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• Error showing is NullPointerException [duplicate]

  - by user3659612

  This question already has an answer here: How to check a string against null in java? 11 answers I was trying to code a wifi scanner which does 20 scans but it shows NullPointerException at if(bssid[j].equals(null)){ My code is slightly huge package com.example.scanner; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.OutputStreamWriter; import java.text.SimpleDateFormat; import java.util.Date; import java.util.List; import android.annotation.SuppressLint; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.net.wifi.ScanResult; import android.net.wifi.WifiInfo; import android.net.wifi.WifiManager; import android.os.Bundle; import android.os.Environment; import android.support.v7.app.ActionBarActivity; import android.view.Menu; import android.view.View; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.ListView; import android.widget.Toast; public class MainActivity extends ActionBarActivity { WifiManager wifi; WifiScanReceiver wifireciever; WifiInfo info; Button scan, save; List<ScanResult> wifilist; ListView list; String wifis[]; String name; String[] ssid = new String[100]; String[] bssid = new String[100]; int[] lvl = new int[100]; int[] count = new int[100]; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.fragment_main); list=(ListView)findViewById(R.id.listView1); scan=(Button)findViewById(R.id.button1); save=(Button)findViewById(R.id.button2); scan.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub wifi=(WifiManager)getSystemService(Context.WIFI_SERVICE); if (wifi.isWifiEnabled()==false){ wifi.setWifiEnabled(true); } wifireciever = new WifiScanReceiver(); for (int i=0;i<20;i++){ registerReceiver(wifireciever, new IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION)); wifi.startScan(); if (i==19){ Toast.makeText(getBaseContext(), "Scan Finish", Toast.LENGTH_LONG).show(); } } } }); save.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub savedata(); } }); } protected void savedata() { // TODO Auto-generated method stub try { File sdcard = Environment.getExternalStorageDirectory(); File directory = new File(sdcard.getAbsolutePath() + "/WIFI_RESULT"); directory.mkdirs(); name = new SimpleDateFormat("yyyy-MM-dd HH mm ss").format(new Date()); File file = new File(directory,name + "wifi_data.txt"); FileOutputStream fou = new FileOutputStream(file); OutputStreamWriter osw = new OutputStreamWriter(fou); try { for (int i =0; i < list.getCount(); i++){ osw.append(list.getItemAtPosition(i).toString()); } osw.flush(); osw.close(); Toast.makeText(getBaseContext(), "Saved", Toast.LENGTH_LONG).show(); } catch (IOException e){ e.printStackTrace(); } } catch (FileNotFoundException e){ e.printStackTrace(); } } class WifiScanReceiver extends BroadcastReceiver { @SuppressLint("UseValueOf") public void onReceive(Context c, Intent intent) { int a =0; wifi.startScan(); List<ScanResult> wifilist = wifi.getScanResults(); if (a<wifilist.size()){ a=wifilist.size(); } for(int j=0;j<wifilist.size();j++){ if(bssid[j].equals(null)){ ssid[j] = wifilist.get(j).SSID.toString(); bssid[j] = wifilist.get(j).BSSID.toString(); lvl[j] = wifilist.get(j).level; count[j]++; } else if (bssid[j].equals(wifilist.get(j).BSSID.toString())){ lvl[j] = lvl[j] + wifilist.get(j).level; count[j]++; } } wifis = new String[a]; for (int i =0; i<a; i++){ wifis[i] = ("\n" + ssid[i] + "\n AP Address" + bssid[i] + "\n Signal Strength:" + lvl[i]/count[i]).toString(); } list.setAdapter(new ArrayAdapter<String>(getApplicationContext(), android.R.layout.simple_list_item_1,wifis)); } } protected void onDestroy() { unregisterReceiver(wifireciever); super.onPause(); } protected void onResume() { registerReceiver(wifireciever, new IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION)); super.onResume(); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } } NullPointerException at that point mean my array bssid isn't initialize. So I just want to know how to initialize it in main activity so that I can use that string bssid anywhere.

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• Connecting SceneBuilder edited FXML to Java code

  - by daniel

  Recently I had to answer several questions regarding how to connect an UI built with the JavaFX SceneBuilder 1.0 Developer Preview to Java Code. So I figured out that a short overview might be helpful. But first, let me state the obvious. What is FXML? To make it short, FXML is an XML based declaration format for JavaFX. JavaFX provides an FXML loader which will parse FXML files and from that construct a graph of Java object. It may sound complex when stated like that but it is actually quite simple. Here is an example of FXML file, which instantiate a StackPane and puts a Button inside it: -- <?xml version="1.0" encoding="UTF-8"?> <?import java.lang.*?> <?import java.util.*?> <?import javafx.scene.control.*?> <?import javafx.scene.layout.*?> <?import javafx.scene.paint.*?> <StackPane prefHeight="150.0" prefWidth="200.0" xmlns:fx="http://javafx.com/fxml"> <children> <Button mnemonicParsing="false" text="Button" /> </children> </StackPane> ... and here is the code I would have had to write if I had chosen to do the same thing programatically: import javafx.scene.control.*; import javafx.scene.layout.*; ... final Button button = new Button("Button"); button.setMnemonicParsing(false); final StackPane stackPane = new StackPane(); stackPane.setPrefWidth(200.0); stackPane.setPrefHeight(150.0); stacPane.getChildren().add(button); As you can see - FXML is rather simple to understand - as it is quite close to the JavaFX API. So OK FXML is simple, but why would I use it?Well, there are several answers to that - but my own favorite is: because you can make it with SceneBuilder. What is SceneBuilder? In short SceneBuilder is a layout tool that will let you graphically build JavaFX user interfaces by dragging and dropping JavaFX components from a library, and save it as an FXML file. SceneBuilder can also be used to load and modify JavaFX scenegraphs declared in FXML. Here is how I made the small FXML file above: Start the JavaFX SceneBuilder 1.0 Developer Preview In the Library on the left hand side, click on 'StackPane' and drag it on the content view (the white rectangle) In the Library, select a Button and drag it onto the StackPane on the content view. In the Hierarchy Panel on the left hand side - select the StackPane component, then invoke 'Edit > Trim To Selected' from the menubar That's it - you can now save, and you will obtain the small FXML file shown above. Of course this is only a trivial sample, made for the sake of the example - and SceneBuilder will let you create much more complex UIs. So, I have now an FXML file. But what do I do with it? How do I include it in my program? How do I write my main class? Loading an FXML file with JavaFX Well, that's the easy part - because the piece of code you need to write never changes. You can download and look at the SceneBuilder samples if you need to get convinced, but here is the short version: Create a Java class (let's call it 'Main.java') which extends javafx.application.Application In the same directory copy/save the FXML file you just created using SceneBuilder. Let's name it "simple.fxml" Now here is the Java code for the Main class, which simply loads the FXML file and puts it as root in a stage's scene. /* * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. */ package simple; import java.util.logging.Level; import java.util.logging.Logger; import javafx.application.Application; import javafx.fxml.FXMLLoader; import javafx.scene.Scene; import javafx.scene.layout.StackPane; import javafx.stage.Stage; public class Main extends Application { /** * @param args the command line arguments */ public static void main(String[] args) { Application.launch(Main.class, (java.lang.String[])null); } @Override public void start(Stage primaryStage) { try { StackPane page = (StackPane) FXMLLoader.load(Main.class.getResource("simple.fxml")); Scene scene = new Scene(page); primaryStage.setScene(scene); primaryStage.setTitle("FXML is Simple"); primaryStage.show(); } catch (Exception ex) { Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex); } } } Great! Now I only have to use my favorite IDE to compile the class and run it. But... wait... what does it do? Well nothing. It just displays a button in the middle of a window. There's no logic attached to it. So how do we do that? How can I connect this button to my application logic? Here is how: Connection to code First let's define our application logic. Since this post is only intended to give a very brief overview - let's keep things simple. Let's say that the only thing I want to do is print a message on System.out when the user clicks on my button. To do that, I'll need to register an action handler with my button. And to do that, I'll need to somehow get a handle on my button. I'll need some kind of controller logic that will get my button and add my action handler to it. So how do I get a handle to my button and pass it to my controller? Once again - this is easy: I just need to write a controller class for my FXML. With each FXML file, it is possible to associate a controller class defined for that FXML. That controller class will make the link between the UI (the objects defined in the FXML) and the application logic. To each object defined in FXML we can associate an fx:id. The value of the id must be unique within the scope of the FXML, and is the name of an instance variable inside the controller class, in which the object will be injected. Since I want to have access to my button, I will need to add an fx:id to my button in FXML, and declare an @FXML variable in my controller class with the same name. In other words - I will need to add fx:id="myButton" to my button in FXML: -- <Button fx:id="myButton" mnemonicParsing="false" text="Button" /> and declare @FXML private Button myButton in my controller class @FXML private Button myButton; // value will be injected by the FXMLLoader Let's see how to do this. Add an fx:id to the Button object Load "simple.fxml" in SceneBuilder - if not already done In the hierarchy panel (bottom left), or directly on the content view, select the Button object. Open the Properties sections of the inspector (right panel) for the button object At the top of the section, you will see a text field labelled fx:id. Enter myButton in that field and validate. Associate a controller class with the FXML file Still in SceneBuilder, select the top root object (in our case, that's the StackPane), and open the Code section of the inspector (right hand side) At the top of the section you should see a text field labelled Controller Class. In the field, type simple.SimpleController. This is the name of the class we're going to create manually. If you save at this point, the FXML will look like this: -- <?xml version="1.0" encoding="UTF-8"?> <?import java.lang.*?> <?import java.util.*?> <?import javafx.scene.control.*?> <?import javafx.scene.layout.*?> <?import javafx.scene.paint.*?> <StackPane prefHeight="150.0" prefWidth="200.0" xmlns:fx="http://javafx.com/fxml" fx:controller="simple.SimpleController"> <children> <Button fx:id="myButton" mnemonicParsing="false" text="Button" /> </children> </StackPane> As you can see, the name of the controller class has been added to the root object: fx:controller="simple.SimpleController" Coding the controller class In your favorite IDE, create an empty SimpleController.java class. Now what does a controller class looks like? What should we put inside? Well - SceneBuilder will help you there: it will show you an example of controller skeleton tailored for your FXML. In the menu bar, invoke View > Show Sample Controller Skeleton. A popup appears, displaying a suggestion for the controller skeleton: copy the code displayed there, and paste it into your SimpleController.java: /** * Sample Skeleton for "simple.fxml" Controller Class * Use copy/paste to copy paste this code into your favorite IDE **/ package simple; import java.net.URL; import java.util.ResourceBundle; import javafx.fxml.FXML; import javafx.fxml.Initializable; import javafx.scene.control.Button; public class SimpleController implements Initializable { @FXML // fx:id="myButton" private Button myButton; // Value injected by FXMLLoader @Override // This method is called by the FXMLLoader when initialization is complete public void initialize(URL fxmlFileLocation, ResourceBundle resources) { assert myButton != null : "fx:id=\"myButton\" was not injected: check your FXML file 'simple.fxml'."; // initialize your logic here: all @FXML variables will have been injected } } Note that the code displayed by SceneBuilder is there only for educational purpose: SceneBuilder does not create and does not modify Java files. This is simply a hint of what you can use, given the fx:id present in your FXML file. You are free to copy all or part of the displayed code and paste it into your own Java class. Now at this point, there only remains to add our logic to the controller class. Quite easy: in the initialize method, I will register an action handler with my button: () { @Override public void handle(ActionEvent event) { System.out.println("That was easy, wasn't it?"); } }); ... -- ... // initialize your logic here: all @FXML variables will have been injected myButton.setOnAction(new EventHandler<ActionEvent>() { @Override public void handle(ActionEvent event) { System.out.println("That was easy, wasn't it?"); } }); ... That's it - if you now compile everything in your IDE, and run your application, clicking on the button should print a message on the console! Summary What happens is that in Main.java, the FXMLLoader will load simple.fxml from the jar/classpath, as specified by 'FXMLLoader.load(Main.class.getResource("simple.fxml"))'. When loading simple.fxml, the loader will find the name of the controller class, as specified by 'fx:controller="simple.SimpleController"' in the FXML. Upon finding the name of the controller class, the loader will create an instance of that class, in which it will try to inject all the objects that have an fx:id in the FXML. Thus, after having created '<Button fx:id="myButton" ... />', the FXMLLoader will inject the button instance into the '@FXML private Button myButton;' instance variable found on the controller instance. This is because The instance variable has an @FXML annotation, The name of the variable exactly matches the value of the fx:id Finally, when the whole FXML has been loaded, the FXMLLoader will call the controller's initialize method, and our code that registers an action handler with the button will be executed. For a complete example, take a look at the HelloWorld SceneBuilder sample. Also make sure to follow the SceneBuilder Get Started guide, which will guide you through a much more complete example. Of course, there are more elegant ways to set up an Event Handler using FXML and SceneBuilder. There are also many different ways to work with the FXMLLoader. But since it's starting to be very late here, I think it will have to wait for another post. I hope you have enjoyed the tour! --daniel

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• What are the basic features of an email module in a common web application?

  - by Coral Doe

  When developing an email module, what are the features to have in mind, besides actual email sending? I am talking about an email module that notifies users of events and periodically sends reports. The only other feature I have in mind is maintaining grey/black lists for users that do illegal operations in the system or any other things that may lead to email/domain/IP banning. Is there an etiquette for developing email modules? Are there some references of requirements for such modules?

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• How can I import models from Blender into jMonkeyEngine?

  - by Nathan Sabruka

  I have some blender model files (Blender version 2.6) which I would like to use with the jMonkeyEngine SDK. However, when I use Blender's native .obj exporter, I can't import it in jMonkeyEngine (the model simply fails to import or looks messed up). I've tried importing .obj files or .blend files directly into the jMonkeyEngine SDK to no avail. I've also tried to use various OGRE exporters to export .scene and .material files, but only the .scene file is created. Is there a simple way to simply export files from Blender into the jMonkeyEngine SDK? EDIT: I seem to have found something in Blender. When I go under addons, there's a warning in the OGRE exporter; "'.mesh' output requires OgreCommandLineTools". However, I have already installed those tools under the C drive. Has anyone else encountered this issue?

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• How to import mass accounts into iKode Newsletter Server?

  - by Brownsithily Smith

  I have sent out emails to my 6.2k subscribers through iKode Newsletter Server. And about 50 to be considered as spam. It is less than 1%. It is amazing! The web based email marketing software of iKode also provides double opt-in subscription form which is effective to target special audience. However, if I want to import mailing list to this software, I need to add the address one by one, which is a waste of time. Does iKode provides mass account import ability? Or just need to upload a mailing list file?

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• Suspend fails and I know the module causing it. What can I do?

  - by ch0wn

  My suspend did not correctly since I installed a USB 3 extension card in my PC. Instead of going to S3, the computer just woke up instantly. dmesg gave the hint "usb_dev_suspend+0x0/0x20 returns -2" so I rmmod'ed the "xhci_hcd" module which did the trick. Is there a good way for me to work around this? The builds from the Kernel Mainline PPA did not help, unfortunately, and blacklisting the module is not my favorite option. Where is the best place for me to report this issue?

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• Sortable & Filterable PrimeFaces DataTable

  - by Geertjan

  <h:form> <p:dataTable value="#{resultManagedBean.customers}" var="customer"> <p:column id="nameHeader" filterBy="#{customer.name}" sortBy="#{customer.name}"> <f:facet name="header"> <h:outputText value="Name" /> </f:facet> <h:outputText value="#{customer.name}" /> </p:column> <p:column id="cityHeader" filterBy="#{customer.city}" sortBy="#{customer.city}"> <f:facet name="header"> <h:outputText value="City" /> </f:facet> <h:outputText value="#{customer.city}" /> </p:column> </p:dataTable> </h:form> That gives me this: And here's the filter in action: Behind this, I have: import com.mycompany.mavenproject3.entities.Customer; import java.io.Serializable; import java.util.List; import javax.annotation.PostConstruct; import javax.ejb.EJB; import javax.faces.bean.RequestScoped; import javax.inject.Named; @Named(value = "resultManagedBean") @RequestScoped public class ResultManagedBean implements Serializable { @EJB private CustomerSessionBean customerSessionBean; public ResultManagedBean() { } private List<Customer> customers; @PostConstruct public void init(){ customers = customerSessionBean.getCustomers(); } public List<Customer> getCustomers() { return customers; } public void setCustomers(List<Customer> customers) { this.customers = customers; } } And the above refers to the EJB below, which is a standard EJB that I create in all my Java EE 6 demos: import com.mycompany.mavenproject3.entities.Customer; import java.io.Serializable; import java.util.List; import javax.ejb.Stateless; import javax.persistence.EntityManager; import javax.persistence.PersistenceContext; @Stateless public class CustomerSessionBean implements Serializable{ @PersistenceContext EntityManager em; public List getCustomers() { return em.createNamedQuery("Customer.findAll").getResultList(); } } Only problem is that the columns are only sortable after the first time I use the filter.

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• NetBeans arrête le support du module Ruby on Rails et concentre ses efforts sur l'intégration de Java SE 7

  NetBeans arrête le support du module Ruby on Rails Et concentre ses efforts sur l'intégration de Java SE 7 NetBeans 7.0, actuellement en bêta et prévu en version définitive pour avril, n'offrira plus de module pour Ruby on Rails. En cause, la faible utilisation de l'IDE d'Oracle par les développeurs Rails et la volonté de l'équipe du projet de se concentrer sur une meilleure intégration de Java 7. La décision est assez peu surprenante. Les développeurs Ruby ont généralement un penchant pour des IDE ...

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• A class meant for an alfresco behavior and its bean, how do they work and how are they deployed trough eclipse

  - by MrHappy

  (This is a partial repost of a question asked 10 days ago because only 1 part was answered(not included), I've rewritten it into a way better question and added 3 more tags) where do I put the DeleteAsset.class or why isn't it being found? I've put the compiled class from the bin of the workspace of eclipse into alfresco-4.2.c/tomcat/webapps/alfresco/WEB-INF/classes/com/openerp/behavior/ and right now it's giving me Error loading class [com.openerp.behavior.DeleteAsset] for bean with name 'deletionBehavior' defined in URL [file:/home/openerp/alfresco-4.2.c/tomcat/shared/classes/alfresco/extension/cust??om-web-context.xml]: problem with class file or dependent class; nested exception is java.lang.NoClassDefFoundError: com/openerp/behavior/DeleteAsset (wrong name: DeleteAsset) when I put it in there. (See bean below!) The code(I'd trying to work without the model class, idk if I made any silly mistakes on that): package com.openerp.behavior; import java.util.List; import java.net.*; import java.io.*; import org.alfresco.repo.node.NodeServicePolicies; import org.alfresco.repo.policy.Behaviour; import org.alfresco.repo.policy.JavaBehaviour; import org.alfresco.repo.policy.PolicyComponent; import org.alfresco.repo.policy.Behaviour.NotificationFrequency; import org.alfresco.repo.security.authentication.AuthenticationUtil; import org.alfresco.repo.security.authentication.AuthenticationUtil.RunAsWork; import org.alfresco.service.cmr.repository.ChildAssociationRef; import org.alfresco.service.cmr.repository.NodeRef; import org.alfresco.service.cmr.repository.NodeService; import org.alfresco.service.namespace.NamespaceService; import org.alfresco.service.namespace.QName; import org.alfresco.service.transaction.TransactionService; import org.apache.log4j.Logger; //this is the newer version //import com.openerp.model.openerpJavaModel; public class DeleteAsset implements NodeServicePolicies.BeforeDeleteNodePolicy { private PolicyComponent policyComponent; private Behaviour beforeDeleteNode; private NodeService nodeService; public void init() { this.beforeDeleteNode = new JavaBehaviour(this,"beforeDeleteNode",NotificationFrequency.EVERY_EVENT); this.policyComponent.bindClassBehaviour(QName.createQName("http://www.someco.com/model/content/1.0","beforeDeleteNode"), QName.createQName("http://www.someco.com/model/content/1.0","sc:doc"), this.beforeDeleteNode); } public setNodeService(NodeService nodeService){ this.nodeService = nodeService; } @Override public void beforeDeleteNode(NodeRef node) { System.out.println("beforeDeleteNode!"); try { QName attachmentID1= QName.createQName("http://www.someco.com/model/content/1.0", "OpenERPattachmentID1"); // this could/shoul be defined in your OpenERPModel-class int attachmentid = (Integer)nodeService.getProperty(node, attachmentID1); //int attachmentid = 123; URL oracle = new URL("http://0.0.0.0:1885/delete/%20?attachmentid=" + attachmentid); URLConnection yc = oracle.openConnection(); BufferedReader in = new BufferedReader(new InputStreamReader( yc.getInputStream())); String inputLine; while ((inputLine = in.readLine()) != null) //System.out.println(inputLine); in.close(); } catch(Exception e) { e.printStackTrace(); } } } This is my full custom-web-context file: <?xml version='1.0' encoding='UTF-8'?> <!DOCTYPE beans PUBLIC '-//SPRING//DTD BEAN//EN' 'http://www.springframework.org/dtd/spring-beans.dtd'> <beans> <!-- Registration of new models --> <bean id="smartsolution.dictionaryBootstrap" parent="dictionaryModelBootstrap" depends-on="dictionaryBootstrap"> <property name="models"> <list> <value>alfresco/extension/scOpenERPModel.xml</value> </list> </property> </bean> <!-- deletion of attachments within openERP when delete is initiated in Alfresco--> <bean id="DeleteAsset" class="com.openerp.behavior.DeleteAsset" init-method="init"> <property name="NodeService"> <ref bean="NodeService" /> </property> <property name="PolicyComponent"> <ref bean="PolicyComponent" /> </property> </bean> and content type: <type name="sc:doc"> <title>OpenERP Document</title> <parent>cm:content</parent> There's also this when I open share An error has occured in the Share component: /share/service/components/dashlets/my-sites. It responded with a status of 500 - Internal Error. Error Code Information: 500 - An error inside the HTTP server which prevented it from fulfilling the request. Error Message: 09230001 Failed to execute script 'classpath*:alfresco/site-webscripts/org/alfresco/components/dashlets/my-sites.get.js': 09230000 09230001 Failed during processing of IMAP server status configuration from Alfresco: 09230000 Unable to retrieve IMAP server status from Alfresco: 404 Server: Alfresco Spring WebScripts - v1.2.0 (Release 1207) schema 1,000 Time: Oct 23, 2013 11:40:06 AM Click here to view full technical information on the error. Exception: org.alfresco.error.AlfrescoRuntimeException - 09230001 Failed during processing of IMAP server status configuration from Alfresco: 09230000 Unable to retrieve IMAP server status from Alfresco: 404 org.alfresco.web.scripts.SingletonValueProcessorExtension.getSingletonValue(SingletonValueProcessorExtension.java:108) org.alfresco.web.scripts.SingletonValueProcessorExtension.getSingletonValue(SingletonValueProcessorExtension.java:59) org.alfresco.web.scripts.ImapServerStatus.getEnabled(ImapServerStatus.java:49) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) java.lang.reflect.Method.invoke(Method.java:606) org.mozilla.javascript.MemberBox.invoke(MemberBox.java:155) org.mozilla.javascript.JavaMembers.get(JavaMembers.java:117) org.mozilla.javascript.NativeJavaObject.get(NativeJavaObject.java:113) org.mozilla.javascript.ScriptableObject.getProperty(ScriptableObject.java:1544) org.mozilla.javascript.ScriptRuntime.getObjectProp(ScriptRuntime.java:1375) org.mozilla.javascript.ScriptRuntime.getObjectProp(ScriptRuntime.java:1364) org.mozilla.javascript.gen.c6._c1(file:/opt/alfresco-4.2.c/tomcat/webapps/share/WEB-INF/classes/alfresco/site-webscripts/org/alfresco/components/dashlets/my-sites.get.js:4) org.mozilla.javascript.gen.c6.call(file:/opt/alfresco-4.2.c/tomcat/webapps/share/WEB-INF/classes/alfresco/site-webscripts/org/alfresco/components/dashlets/my-sites.get.js) org.mozilla.javascript.optimizer.OptRuntime.callName0(OptRuntime.java:108) org.mozilla.javascript.gen.c6._c0(file:/opt/alfresco-4.2.c/tomcat/webapps/share/WEB-INF/classes/alfresco/site-webscripts/org/alfresco/components/dashlets/my-sites.get.js:51) org.mozilla.javascript.gen.c6.call(file:/opt/alfresco-4.2.c/tomcat/webapps/share/WEB-INF/classes/alfresco/site-webscripts/org/alfresco/components/dashlets/my-sites.get.js) org.mozilla.javascript.ContextFactory.doTopCall(ContextFactory.java:393) org.mozilla.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:2834) org.mozilla.javascript.gen.c6.call(file:/opt/alfresco-4.2.c/tomcat/webapps/share/WEB-INF/classes/alfresco/site-webscripts/org/alfresco/components/dashlets/my-sites.get.js) org.mozilla.javascript.gen.c6.exec(file:/opt/alfresco-4.2.c/tomcat/webapps/share/WEB-INF/classes/alfresco/site-webscripts/org/alfresco/components/dashlets/my-sites.get.js) org.springframework.extensions.webscripts.processor.JSScriptProcessor.executeScriptImpl(JSScriptProcessor.java:318) org.springframework.extensions.webscripts.processor.JSScriptProcessor.executeScript(JSScriptProcessor.java:192) org.springframework.extensions.webscripts.AbstractWebScript.executeScript(AbstractWebScript.java:1305) org.springframework.extensions.webscripts.DeclarativeWebScript.execute(DeclarativeWebScript.java:86) org.springframework.extensions.webscripts.PresentationContainer.executeScript(PresentationContainer.java:70) org.springframework.extensions.webscripts.LocalWebScriptRuntimeContainer.executeScript(LocalWebScriptRuntimeContainer.java:240) org.springframework.extensions.webscripts.AbstractRuntime.executeScript(AbstractRuntime.java:377) org.springframework.extensions.webscripts.AbstractRuntime.executeScript(AbstractRuntime.java:209) org.springframework.extensions.webscripts.WebScriptProcessor.executeBody(WebScriptProcessor.java:310) org.springframework.extensions.surf.render.AbstractProcessor.execute(AbstractProcessor.java:57) org.springframework.extensions.surf.render.RenderService.process(RenderService.java:599) org.springframework.extensions.surf.render.RenderService.renderSubComponent(RenderService.java:505) org.springframework.extensions.surf.render.RenderService.renderChromeInclude(RenderService.java:1284) org.springframework.extensions.directives.ChromeIncludeFreeMarkerDirective.execute(ChromeIncludeFreeMarkerDirective.java:81) freemarker.core.Environment.visit(Environment.java:274) freemarker.core.UnifiedCall.accept(UnifiedCall.java:126) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.MixedContent.accept(MixedContent.java:92) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.IfBlock.accept(IfBlock.java:82) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.MixedContent.accept(MixedContent.java:92) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.Environment.process(Environment.java:199) org.springframework.extensions.webscripts.processor.FTLTemplateProcessor.process(FTLTemplateProcessor.java:171) org.springframework.extensions.webscripts.WebTemplateProcessor.executeBody(WebTemplateProcessor.java:438) org.springframework.extensions.surf.render.AbstractProcessor.execute(AbstractProcessor.java:57) org.springframework.extensions.surf.render.RenderService.processRenderable(RenderService.java:204) org.springframework.extensions.surf.render.bean.ChromeRenderer.body(ChromeRenderer.java:95) org.springframework.extensions.surf.render.AbstractRenderer.render(AbstractRenderer.java:77) org.springframework.extensions.surf.render.bean.ChromeRenderer.render(ChromeRenderer.java:86) org.springframework.extensions.surf.render.RenderService.processComponent(RenderService.java:432) org.springframework.extensions.surf.render.bean.ComponentRenderer.body(ComponentRenderer.java:94) org.springframework.extensions.surf.render.AbstractRenderer.render(AbstractRenderer.java:77) org.springframework.extensions.surf.render.RenderService.renderComponent(RenderService.java:961) org.springframework.extensions.surf.render.RenderService.renderRegionComponents(RenderService.java:900) org.springframework.extensions.surf.render.RenderService.renderChromeInclude(RenderService.java:1263) org.springframework.extensions.directives.ChromeIncludeFreeMarkerDirective.execute(ChromeIncludeFreeMarkerDirective.java:81) freemarker.core.Environment.visit(Environment.java:274) freemarker.core.UnifiedCall.accept(UnifiedCall.java:126) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.MixedContent.accept(MixedContent.java:92) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.Environment.process(Environment.java:199) org.springframework.extensions.webscripts.processor.FTLTemplateProcessor.process(FTLTemplateProcessor.java:171) org.springframework.extensions.webscripts.WebTemplateProcessor.executeBody(WebTemplateProcessor.java:438) org.springframework.extensions.surf.render.AbstractProcessor.execute(AbstractProcessor.java:57) org.springframework.extensions.surf.render.RenderService.processRenderable(RenderService.java:204) org.springframework.extensions.surf.render.bean.ChromeRenderer.body(ChromeRenderer.java:95) org.springframework.extensions.surf.render.AbstractRenderer.render(AbstractRenderer.java:77) org.springframework.extensions.surf.render.bean.ChromeRenderer.render(ChromeRenderer.java:86) org.springframework.extensions.surf.render.bean.RegionRenderer.body(RegionRenderer.java:99) org.springframework.extensions.surf.render.AbstractRenderer.render(AbstractRenderer.java:77) org.springframework.extensions.surf.render.RenderService.renderRegion(RenderService.java:851) org.springframework.extensions.directives.RegionDirectiveData.render(RegionDirectiveData.java:91) org.springframework.extensions.surf.extensibility.impl.ExtensibilityModelImpl.merge(ExtensibilityModelImpl.java:408) org.springframework.extensions.surf.extensibility.impl.AbstractExtensibilityDirective.merge(AbstractExtensibilityDirective.java:169) org.springframework.extensions.surf.extensibility.impl.AbstractExtensibilityDirective.execute(AbstractExtensibilityDirective.java:137) freemarker.core.Environment.visit(Environment.java:274) freemarker.core.UnifiedCall.accept(UnifiedCall.java:126) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:179) freemarker.core.Environment.visit(Environment.java:428) freemarker.core.IteratorBlock.accept(IteratorBlock.java:102) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.MixedContent.accept(MixedContent.java:92) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:179) freemarker.core.Environment.visit(Environment.java:428) freemarker.core.IteratorBlock.accept(IteratorBlock.java:102) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.MixedContent.accept(MixedContent.java:92) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.Macro$Context.runMacro(Macro.java:172) freemarker.core.Environment.visit(Environment.java:614) freemarker.core.UnifiedCall.accept(UnifiedCall.java:106) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.IfBlock.accept(IfBlock.java:82) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.Macro$Context.runMacro(Macro.java:172) freemarker.core.Environment.visit(Environment.java:614) freemarker.core.UnifiedCall.accept(UnifiedCall.java:106) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.MixedContent.accept(MixedContent.java:92) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.Environment$3.render(Environment.java:246) org.springframework.extensions.surf.extensibility.impl.DefaultExtensibilityDirectiveData.render(DefaultExtensibilityDirectiveData.java:119) org.springframework.extensions.surf.extensibility.impl.ExtensibilityModelImpl.merge(ExtensibilityModelImpl.java:408) org.springframework.extensions.surf.extensibility.impl.AbstractExtensibilityDirective.merge(AbstractExtensibilityDirective.java:169) org.springframework.extensions.surf.extensibility.impl.AbstractExtensibilityDirective.execute(AbstractExtensibilityDirective.java:137) freemarker.core.Environment.visit(Environment.java:274) freemarker.core.UnifiedCall.accept(UnifiedCall.java:126) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.MixedContent.accept(MixedContent.java:92) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.Environment.visit(Environment.java:406) freemarker.core.BodyInstruction.accept(BodyInstruction.java:93) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.MixedContent.accept(MixedContent.java:92) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.Macro$Context.runMacro(Macro.java:172) freemarker.core.Environment.visit(Environment.java:614) freemarker.core.UnifiedCall.accept(UnifiedCall.java:106) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.MixedContent.accept(MixedContent.java:92) freemarker.core.Environment.visit(Environment.java:221) freemarker.core.Environment.process(Environment.java:199) org.springframework.extensions.webscripts.processor.FTLTemplateProcessor.process(FTLTemplateProcessor.java:171) org.springframework.extensions.webscripts.WebTemplateProcessor.executeBody(WebTemplateProcessor.java:438) org.springframework.extensions.surf.render.AbstractProcessor.execute(AbstractProcessor.java:57) org.springframework.extensions.surf.render.RenderService.processTemplate(RenderService.java:721) org.springframework.extensions.surf.render.bean.TemplateInstanceRenderer.body(TemplateInstanceRenderer.java:140) org.springframework.extensions.surf.render.AbstractRenderer.render(AbstractRenderer.java:77) org.springframework.extensions.surf.render.bean.PageRenderer.body(PageRenderer.java:85) org.springframework.extensions.surf.render.AbstractRenderer.render(AbstractRenderer.java:77) org.springframework.extensions.surf.render.RenderService.renderPage(RenderService.java:762) org.springframework.extensions.surf.mvc.PageView.dispatchPage(PageView.java:411) org.springframework.extensions.surf.mvc.PageView.renderView(PageView.java:306) org.springframework.extensions.surf.mvc.AbstractWebFrameworkView.renderMergedOutputModel(AbstractWebFrameworkView.java:316) org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:250) org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1047) org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:817) org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719) org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644) org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:549) javax.servlet.http.HttpServlet.service(HttpServlet.java:621) javax.servlet.http.HttpServlet.service(HttpServlet.java:722) org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) org.alfresco.web.site.servlet.MTAuthenticationFilter.doFilter(MTAuthenticationFilter.java:74) org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) org.alfresco.web.site.servlet.SSOAuthenticationFilter.doFilter(SSOAuthenticationFilter.java:374) org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222) org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123) org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99) org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929) org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1002) org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585) org.apache.tomcat.util.net.AprEndpoint$SocketWithOptionsProcessor.run(AprEndpoint.java:1771) java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) java.lang.Thread.run(Thread.java:724) Exception: org.springframework.extensions.webscripts.WebScriptException - 09230000 09230001 Failed during processing of IMAP server status configuration from Alfresco: 09230000 Unable to retrieve IMAP server status from Alfresco: 404 org.springframework.extensions.webscripts.processor.JSScriptProcessor.executeScriptImpl(JSScriptProcessor.java:324) Exception: org.springframework.extensions.webscripts.WebScriptException - 09230001 Failed to execute script 'classpath*:alfresco/site-webscripts/org/alfresco/components/dashlets/my-sites.get.js': 09230000 09230001 Failed during processing of IMAP server status configuration from Alfresco: 09230000 Unable to retrieve IMAP server status from Alfresco: 404 org.springframework.extensions.webscripts.processor.JSScriptProcessor.executeScript(JSScriptProcessor.java:200) UPDATE: I think I've found the problem. Being a newbie to eclipse I haven't managed the dependecies well I think. Could anyone link me to a tutorial describing how to get org.alfresco.repo.node.NodeServicePolicies; as seen in import org.alfresco.repo.node.NodeServicePolicies; and other such imports into eclipse, I've got the alfresco source from svn but the tutorial I've found seems to fail me. java/lang/Error\00\F1Unresolved compilation problems: The declared package "com.openerp.behavior" does not match the expected package "java.com.openerp.behavior" The import org.alfresco cannot be resolved The import org.alfresco cannot be resolved The import org.alfresco cannot be resolved The import org.alfresco cannot be resolved The import org.alfresco cannot be resolved The import org.alfresco cannot be resolved The import org.alfresco cannot be resolved The import org.alfresco cannot be resolved The import org.alfresco cannot be resolved The import org.alfresco cannot be resolved The import org.alfresco cannot be resolved The import org.alfresco cannot be resolved The import org.alfresco cannot be resolved The import org.apache cannot be resolved The import com.openerp cannot be resolved NodeServicePolicies cannot be resolved to a type PolicyComponent cannot be resolved to a type Behaviour cannot be resolved to a type NodeService cannot be resolved to a type Behaviour cannot be resolved to a type JavaBehaviour cannot be resolved to a type NotificationFrequency cannot be resolved to a variable PolicyComponent cannot be resolved to a type QName cannot be resolved QName cannot be resolved Behaviour cannot be resolved to a type Return type for the method is missing NodeService cannot be resolved to a type NodeService cannot be resolved to a type NodeRef cannot be resolved to a type QName cannot be resolved to a type QName cannot be resolved NodeService cannot be resolved to a type \00\00\00\00\00(Ljava/lang/String;)V\00LineNumberTable\00LocalVariableTable\00this\00'Ljava/com/openerp/behavior/DeleteAsset;\00init\008Unresolved compilation problems: Behaviour cannot be resolved to a type JavaBehaviour cannot be resolved to a type NotificationFrequency cannot be resolved to a variable PolicyComponent cannot be resolved to a type QName cannot be resolved QName cannot be resolved Behaviour cannot be resolved to a type \00(LNodeRef;)V\00\00\B0Unresolved compilation problems: NodeRef cannot be resolved to a type QName cannot be resolved to a type QName cannot be resolved NodeService cannot be resolved to a type

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• How is Perl's @INC constructed? (aka What are all the ways of affecting where Perl modules are searc

  - by DVK

  What are all the ways of affecting where Perl modules are searched for? or, How is Perl's @INC constructed? As we know, Perl uses @INC array containing directory names to determine where to search for Perl module files. There does not seem to be a comprehensive "@INC" FAQ-type post on StackOverflow, so this question is intended as one.

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• Importing a large dataset into a database

  - by peaceful

  I'm a beginning programmer in the relevant areas to this question, so if possible, it'd be helpful to avoid assuming I know a lot already. I'm trying to import the OpenLibrary dataset into a local Postgres database. After it's imported, I plan to use it as a starting seed for a Ruby on Rails application that will include information on books. The OpenLibrary datasets are available here, in a modified JSON format: http://openlibrary.org/dev/docs/jsondump I only need very basic information for my application, much less than what is provided in the dumps. I'm only trying to get out book titles, author names, and relationships between books and authors. Below are two typical entries from their dataset, the first for an author, and the second for a book (they seem to have an entry for each edition of a book). The entries seem to lead off with a primary key, and then with a type, before including the actual JSON database dump. /a/OL2A /type/author {"name": "U. Venkatakrishna Rao", "personal_name": "U. Venkatakrishna Rao", "last_modified": {"type": "/type/datetime", "value": "2008-09-10 08:44:01.978456"}, "key": "/a/OL2A", "birth_date": "1904", "type": {"key": "/type/author"}, "id": 99, "revision": 3} /b/OL345M /type/edition {"publishers": ["Social Science Research Project, Dept. of Geography, University of Dacca"], "pagination": "ii, 54 p.", "title": "Land use in Fayadabad area", "lccn": ["sa 65000491"], "subject_place": ["East Pakistan", "Dacca region."], "number_of_pages": 54, "languages": [{"comment": "initial import", "code": "eng", "name": "English", "key": "/l/eng"}], "lc_classifications": ["S471.P162 E23"], "publish_date": "1963", "publish_country": "pk ", "key": "/b/OL345M", "authors": [{"birth_date": "1911", "name": "Nafis Ahmad", "key": "/a/OL302A", "personal_name": "Nafis Ahmad"}], "publish_places": ["Dacca, East Pakistan"], "by_statement": "[by] Nafis Ahmad and F. Karim Khan.", "oclc_numbers": ["4671066"], "contributions": ["Khan, Fazle Karim, joint author."], "subjects": ["Land use -- East Pakistan -- Dacca region."]} The size of the uncompressed dumps are enormous, about 2GB for the authors list, and 18GB for the book editions list. OpenLibrary does not provide any tools for this themselves, they provide a simple unoptimized Python script for reading in sample data (which unlike the actual dumps comes in pure JSON format), but they estimate if that was modified for use on their actual data it would take 2 months (!) to finish loading the data. How can I read this into the database? I assume I'll need to write a program to do this. What language and any guidance on how I should do it to finish in a reasonable amount of time? The only scripting language I have any experience with is Ruby.

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• codepad.org Perl runner limitations

  - by Lemurik

  Sometimes I see people use http://codepad.org as a way to quickly run/test their Perl snippets (it supports doing that with a wide variety of languages, from C to Scheme to Perl). It's pretty obious that there must be some limitations as to what code/features can be tested with codepad - does anyone know what those limitations are for Perl runner? I'll get the ball rolling on my own observation: not every CPAN module is avialable :(

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• Wn32 PHP extension development

  - by Olaseni

  What are first steps creating a loadable DLL module extension for PHP to create native support for my own library on Windows? Would it require re-compiling PHP on windows? What are the tools needed? I don't want to have to use exec and the command line.

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• Mocking ImportError in Python

  - by Attila Oláh

  I'm trying this for almost two hours now, without any luck. I have a module that looks like this: try: from zope.cpomonent import queryUtility # and things like this except ImportError: # do some fallback operations <-- how to test this? Later in the code: try: queryUtility(foo) except NameError: # do some fallback actions <-- this one is easy with mocking # zope.component.queryUtility to raise a NameError Any ideas?

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• Please Explain Drupal schema and drupal_write_record

  - by Aaron

  Hi. A few questions. 1) Where is the best place to populate a new database table when a module is first installed, enabled? I need to go and get some data from an external source and want to do it transparently when the user installs/enables my custom module. I create the schema in {mymodule}_schema(), do drupal_install_schema({tablename}); in hook_install. Then I try to populate the table in hook_enable using drupal_write_record. I confirmed the table was created, I get no errors when hook_enable executes, but when I query the new table, I get no rows back--it's empty. Here's one variation of the code I've tried: /** * Implementation of hook_schema() */ function ncbi_subsites_schema() { // we know it's MYSQL, so no need to check $schema['ncbi_subsites_sites'] = array( 'description' => 'The base table for subsites', 'fields' => array( 'site_id' => array( 'description' => 'Primary id for site', 'type' => 'serial', 'unsigned' => TRUE, 'not null' => TRUE, ), // end site_id 'title' => array( 'description' => 'The title of the subsite', 'type' => 'varchar', 'length' => 255, 'not null' => TRUE, 'default' => '', ), //end title field 'url' => array( 'description' => 'The URL of the subsite in Production', 'type' => 'varchar', 'length' => 255, 'default' => '', ), //end url field ), //end fields 'unique keys' => array( 'site_id'=> array('site_id'), 'title' => array('title'), ), //end unique keys 'primary_key' => array('site_id'), ); // end schema return $schema; } Here's hook_install: function ncbi_subsites_install() { drupal_install_schema('ncbi_subsites'); } Here's hook_enable: function ncbi_subsites_enable() { drupal_get_schema('ncbi_subsites_site'); // my helper function to get data for table (not shown) $subsites = ncbi_subsites_get_subsites(); foreach( $subsites as $name=>$attrs ) { $record = new stdClass(); $record->title = $name; $record->url = $attrs['homepage']; drupal_write_record( 'ncbi_subsites_sites', $record ); } } Can someone tell me what I'm missing?

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• Importing a dmp with partitioned tables into Oracle XE

  - by Paul

  I've got a schema containing partitioned tables. I can use exp to create a .dmp, but when I import that into Oracle XE, I get errors because Oracle XE doesn't support partitioned tables. How do I get the .dmp imported into Oracle XE? I think pre-creating the tables might do it, but how do I extract the DDL in some automated way to do this? Or can I create the exp somehow without partitions?

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• Python importing

  - by Algorist

  Hi, If I have a file myfile.py, which imports Class1 from file.py and file.py contains imports to different classes in file2.py, file3.py, file4.py. In my myfile.py, can I access these classes or do I need to again import file2.py, file3.py etc... My question is whether python automatically add all the imports included in the file I imported, and can I use them automatically. Thank you. Bala

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• JSON error Caused by: java.lang.NullPointerException

  - by user3821853

  im trying to make a register page on android using JSON. everytime i press register button on avd, i get an error "unfortunately database has stopped". i have a error on my logcat that i cannot understand. this my code. please someone help me. this my register.java import android.app.Activity; import android.app.ProgressDialog; import android.os.AsyncTask; import android.os.Bundle; import android.util.Log; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; import org.apache.http.NameValuePair; import org.apache.http.message.BasicNameValuePair; import org.json.JSONException; import org.json.JSONObject; import java.util.ArrayList; import java.util.List; public class Register extends Activity implements OnClickListener{ private EditText user, pass; private Button mRegister; // Progress Dialog private ProgressDialog pDialog; // JSON parser class JSONParser jsonParser = new JSONParser(); //php register script //localhost : //testing on your device //put your local ip instead, on windows, run CMD > ipconfig //or in mac's terminal type ifconfig and look for the ip under en0 or en1 // private static final String REGISTER_URL = "http://xxx.xxx.x.x:1234/webservice/register.php"; //testing on Emulator: private static final String REGISTER_URL = "http://10.0.2.2:1234/webservice/register.php"; //testing from a real server: //private static final String REGISTER_URL = "http://www.mybringback.com/webservice/register.php"; //ids private static final String TAG_SUCCESS = "success"; private static final String TAG_MESSAGE = "message"; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.register); user = (EditText)findViewById(R.id.username); pass = (EditText)findViewById(R.id.password); mRegister = (Button)findViewById(R.id.register); mRegister.setOnClickListener(this); } @Override public void onClick(View v) { // TODO Auto-generated method stub new CreateUser().execute(); } class CreateUser extends AsyncTask<String, String, String> { @Override protected void onPreExecute() { super.onPreExecute(); pDialog = new ProgressDialog(Register.this); pDialog.setMessage("Creating User..."); pDialog.setIndeterminate(false); pDialog.setCancelable(true); pDialog.show(); } @Override protected String doInBackground(String... args) { // TODO Auto-generated method stub // Check for success tag int success; String username = user.getText().toString(); String password = pass.getText().toString(); try { // Building Parameters List<NameValuePair> params = new ArrayList<NameValuePair>(); params.add(new BasicNameValuePair("username", username)); params.add(new BasicNameValuePair("password", password)); Log.d("request!", "starting"); //Posting user data to script JSONObject json = jsonParser.makeHttpRequest( REGISTER_URL, "POST", params); // full json response Log.d("Registering attempt", json.toString()); // json success element success = json.getInt(TAG_SUCCESS); if (success == 1) { Log.d("User Created!", json.toString()); finish(); return json.getString(TAG_MESSAGE); }else{ Log.d("Registering Failure!", json.getString(TAG_MESSAGE)); return json.getString(TAG_MESSAGE); } } catch (JSONException e) { e.printStackTrace(); } return null; } protected void onPostExecute(String file_url) { // dismiss the dialog once product deleted pDialog.dismiss(); if (file_url != null){ Toast.makeText(Register.this, file_url, Toast.LENGTH_LONG).show(); } } } } this is JSONparser.java import android.util.Log; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.NameValuePair; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.HttpGet; import org.apache.http.client.methods.HttpPost; import org.apache.http.client.utils.URLEncodedUtils; import org.apache.http.impl.client.DefaultHttpClient; import org.json.JSONException; import org.json.JSONObject; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.UnsupportedEncodingException; import java.util.List; public class JSONParser { static InputStream is = null; static JSONObject jObj = null; static String json = ""; // constructor public JSONParser() { } public JSONObject getJSONFromUrl(final String url) { // Making HTTP request try { // Construct the client and the HTTP request. DefaultHttpClient httpClient = new DefaultHttpClient(); HttpPost httpPost = new HttpPost(url); // Execute the POST request and store the response locally. HttpResponse httpResponse = httpClient.execute(httpPost); // Extract data from the response. HttpEntity httpEntity = httpResponse.getEntity(); // Open an inputStream with the data content. is = httpEntity.getContent(); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } try { // Create a BufferedReader to parse through the inputStream. BufferedReader reader = new BufferedReader(new InputStreamReader( is, "iso-8859-1"), 8); // Declare a string builder to help with the parsing. StringBuilder sb = new StringBuilder(); // Declare a string to store the JSON object data in string form. String line = null; // Build the string until null. while ((line = reader.readLine()) != null) { sb.append(line + "\n"); } // Close the input stream. is.close(); // Convert the string builder data to an actual string. json = sb.toString(); } catch (Exception e) { Log.e("Buffer Error", "Error converting result " + e.toString()); } // Try to parse the string to a JSON object try { jObj = new JSONObject(json); } catch (JSONException e) { Log.e("JSON Parser", "Error parsing data " + e.toString()); } // Return the JSON Object. return jObj; } // function get json from url // by making HTTP POST or GET mehtod public JSONObject makeHttpRequest(String url, String method, List<NameValuePair> params) { // Making HTTP request try { // check for request method if(method == "POST"){ // request method is POST // defaultHttpClient DefaultHttpClient httpClient = new DefaultHttpClient(); HttpPost httpPost = new HttpPost(url); httpPost.setEntity(new UrlEncodedFormEntity(params)); HttpResponse httpResponse = httpClient.execute(httpPost); HttpEntity httpEntity = httpResponse.getEntity(); is = httpEntity.getContent(); }else if(method == "GET"){ // request method is GET DefaultHttpClient httpClient = new DefaultHttpClient(); String paramString = URLEncodedUtils.format(params, "utf-8"); url += "?" + paramString; HttpGet httpGet = new HttpGet(url); HttpResponse httpResponse = httpClient.execute(httpGet); HttpEntity httpEntity = httpResponse.getEntity(); is = httpEntity.getContent(); } } catch (UnsupportedEncodingException e) { e.printStackTrace(); } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } try { BufferedReader reader = new BufferedReader(new InputStreamReader( is, "iso-8859-1"), 8); StringBuilder sb = new StringBuilder(); String line = null; while ((line = reader.readLine()) != null) { sb.append(line + "\n"); } is.close(); json = sb.toString(); } catch (Exception e) { Log.e("Buffer Error", "Error converting result " + e.toString()); } // try parse the string to a JSON object try { jObj = new JSONObject(json); } catch (JSONException e) { Log.e("JSON Parser", "Error parsing data " + e.toString()); } // return JSON String return jObj; } } and this my error 08-18 23:40:02.381 2000-2018/com.example.blackcustomzier.database E/Buffer Error? Error converting result java.lang.NullPointerException: lock == null 08-18 23:40:02.381 2000-2018/com.example.blackcustomzier.database E/JSON Parser? Error parsing data org.json.JSONException: End of input at character 0 of 08-18 23:40:02.391 2000-2018/com.example.blackcustomzier.database W/dalvikvm? threadid=15: thread exiting with uncaught exception (group=0xb0f37648) 08-18 23:40:02.391 2000-2018/com.example.blackcustomzier.database E/AndroidRuntime? FATAL EXCEPTION: AsyncTask #4 java.lang.RuntimeException: An error occured while executing doInBackground() at android.os.AsyncTask$3.done(AsyncTask.java:299) at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:352) at java.util.concurrent.FutureTask.setException(FutureTask.java:219) at java.util.concurrent.FutureTask.run(FutureTask.java:239) at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573) at java.lang.Thread.run(Thread.java:841) Caused by: java.lang.NullPointerException at com.example.blackcustomzier.database.Register$CreateUser.doInBackground(Register.java:108) at com.example.blackcustomzier.database.Register$CreateUser.doInBackground(Register.java:74) at android.os.AsyncTask$2.call(AsyncTask.java:287) at java.util.concurrent.FutureTask.run(FutureTask.java:234)             at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)             at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)             at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)             at java.lang.Thread.run(Thread.java:841) 08-18 23:40:02.501 2000-2000/com.example.blackcustomzier.database W/EGL_emulation? eglSurfaceAttrib not implemented 08-18 23:40:02.591 2000-2000/com.example.blackcustomzier.database W/EGL_emulation? eglSurfaceAttrib not implemented 08-18 23:40:02.981 2000-2000/com.example.blackcustomzier.database E/WindowManager? Activity com.example.blackcustomzier.database.Register has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{b1294c60 V.E..... R......D 0,0-1026,288} that was originally added here android.view.WindowLeaked: Activity com.example.blackcustomzier.database.Register has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{b1294c60 V.E..... R......D 0,0-1026,288} that was originally added here at android.view.ViewRootImpl.<init>(ViewRootImpl.java:345) at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:239) at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69) at android.app.Dialog.show(Dialog.java:281) at com.example.blackcustomzier.database.Register$CreateUser.onPreExecute(Register.java:85) at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:586) at android.os.AsyncTask.execute(AsyncTask.java:534) at com.example.blackcustomzier.database.Register.onClick(Register.java:70) at android.view.View.performClick(View.java:4240) at android.view.View.onKeyUp(View.java:7928) at android.widget.TextView.onKeyUp(TextView.java:5606) at android.view.KeyEvent.dispatch(KeyEvent.java:2647) at android.view.View.dispatchKeyEvent(View.java:7343) at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1393) at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1393) at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1393) at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1393) at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchKeyEvent(PhoneWindow.java:1933) at com.android.internal.policy.impl.PhoneWindow.superDispatchKeyEvent(PhoneWindow.java:1408) at android.app.Activity.dispatchKeyEvent(Activity.java:2384) at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:1860) at android.view.ViewRootImpl$ViewPostImeInputStage.processKeyEvent(ViewRootImpl.java:3791) at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:3774) at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379) at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3429) at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3398) at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3483) at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3406) at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:3540) at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379) at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3429) at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3398) at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3406) at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379) at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3429) at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3398) at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3516) at android.view.ViewRootImpl$ImeInputStage.onFinishedInputEvent(ViewRootImpl.java:3666) at android.view.inputmethod.InputMethodManager$PendingEvent.run(InputMethodManager.java:1982) at android.view.inputmethod.InputMethodManager.invokeFinishedInputEventCallback(InputMethodManager.java:1698) at android.view.inputmethod.InputMethodManager.finishedInputEvent(InputMethodManager.java:1689) at android.view.inputmethod.InputMethodManager$ImeInputEventSender.onInputEventFinished(InputMethodManager.java:1959) at android.view.InputEventSender.dispatchInputEventFinished(InputEventSender.java:141) at android.os.MessageQueue.nativePollOnce(Native Method) at android.os.MessageQueue.next(MessageQueue.java:132) at android.os.Looper.loop(Looper.java:124) at android.app.ActivityThread.main(ActivityThread.java:5103) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:525) at com.android.internal.os.ZygoteInit$MethodAndArgsCal please help me to solve this thx

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