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  • Return an Object in Java

    - by digby12
    I've been struggling to work out how to return an object. I have the following array of objects. ArrayList<Object> favourites; I want to find an object in the array based on it's "description" property. public Item finditem(String description) { for (Object x : favourites) { if(description.equals(x.getDescription())) { return Object x; else { return null; Can someone please show me how I would write this code. Thanks.

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  • Trouble accessing fields of a serialized object in Java

    - by typoknig
    I have instantized a class that implements Serializable and I am trying to stream that object like this: try{ Socket socket = new Socket("localhost", 8000); ObjectOutputStream toServer = new ObjectOutputStream(socket.getOutputStream()); toServer.writeObject(myObject); } catch (IOException ex) { System.err.println(ex); } All good so far right? Then I am trying to read the fields of that object like this: //This is an inner class class HandleClient implements Runnable{ private ObjectInputStream fromClient; private Socket socket; // This socket was established earlier try { fromClient = new ObjectInputStream(socket.getInputStream()); GetField inputObjectFields = fromClient.readFields(); double myFristVariable = inputObjectFields.get("myFirstVariable", 0); int mySecondVariable = inputObjectFields.get("mySecondVariable", 0); //do stuff } catch (IOException ex) { System.err.println(ex); } catch (ClassNotFoundException ex) { System.err.println(ex); } finally { try { fromClient.close(); } catch (Exception ex) { ex.printStackTrace(); } } } But I always get the error: java.io.NotActiveException: not in call to readObject This is my first time streaming objects instead of primitive data types, what am I doing wrong? BONUS When I do get this working correctly, is the ENTIRE CLASS passed with the serialized object (i.e. will I have access to the methods of the object's class)? My reading suggests that the entire class is passed with the object, but I have been unable to use the objects methods thus far. How exactly do I call on the object's methods? In addition to my code above I also experimented with the readObject method, but I was probably using it wrong too because I couldn't get it to work. Please enlighten me.

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  • SNMP custom script :: OID not increasing

    - by amprantino
    I try to create a custom SNMP oid. I add the following like to snmpd.conf (and restart service) : pass .1.3.6.1.3.2 /bin/myscript.sh cat myscript.sh #!/bin/sh echo .1.3.6.1.3.2 echo gauge exec 100 snmpwalk -c mycommunity -v2c 10.2.1.4 .1.3.6.1.3.2 SNMPv2-SMI::experimental.2 = Gauge32: 100 Error: OID not increasing: SNMPv2-SMI::experimental.2 >= SNMPv2-SMI::experimental.2 Is snmpwalk expecting anything at the end of the query ? snmpget work with no problem! Thank you

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  • How to implement custom domain feature like posterous?

    - by Weiwei
    here is how posterous works, I make a A record of DNS of my domain (blog.mydomainname.com) to posterous IP address 67.207.139.81 , in the manage panel of posterous , i put my custom domain (blog.meetingly.com). Then i can reach my posterous blog http://mydomainname.posterous.com from http://blog.mydomainname.com url. How posterous implements this? Is this a DNS level thing or web server level setting? Thanks a lot!

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  • Avoiding Object Oriented Pitfalls, Migrating from C, What Worked for You?

    - by Stephen
    I've been programming in procedural languages for quite some time now, and my first reaction to a problem is to start breaking it down into tasks to perform rather than to consider the different entities (objects) that exist and their relationships. I have had a university course in OOP, and understand the fundamentals of encapsulation, data abstraction, polymorphism, modularity and inheritance. I read Learning to think in the Object Oriented Way and Learning object oriented thinking, and will be looking at some of the books pointed to in those answers. I think that several of my medium to large sized projects will benefit from effective use of OOP but as a novice I would like to avoid time consuming, common errors. Based on your experiences, what are these pitfalls and what are reasonable ways around them? If you could explain why they are pitfalls, and how your suggestion is effective in addressing the issue it'd be appreciated. I'm thinking along the lines of something like "Is it common to have a fair number of observer and modifier methods and use private variables or are there techniques for consolidating/reducing them?" I'm not worried about using C++ as a pure OO language, if there are good reasons to mix methods. (Reminiscent of the reasons to use GOTOs, albeit sparingly.) Thank you!

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  • AdSense (reports) and custom channels

    - by RobbertT
    Please help me to further understand custom channels. As Google says it is a way to map your ads, but I still have a few questions: Is it correct that a single custom channel per 1 ad is not very useful, since you can specify Ad blocks in the AdSense reports? I have multiple Ads in multiple custom channels. After this I created 1 custom channel and added all the ads to it. I made this channel targetable, so people can target through this channel on all ads at once. Is this a good way to do it? In other words, is it possible to have ads in multiple custom channels (without targeting, just for analyzing) and then create 1 custom channel with targeting that embraces all the (desired) ads? Why is it not possible for me to analyze custom channels (or ad blocks & formats) per site in the Adsense (reports). Or am I doing something wrong? If not, I have to create different custom channels per site to see how certain ads are doing on a site level?

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  • DB Object passing between classes singleton, static or other?

    - by Stephen
    So I'm designing a reporting system at work it's my first project written OOP and I'm stuck on the design choice for the DB class. Obviously I only want to create one instance of the DB class per-session/user and then pass it to each of the classes that need it. What I don't know it what's best practice for implementing this. Currently I have code like the following:- class db { private $user = 'USER'; private $pass = 'PASS'; private $tables = array( 'user','report', 'etc...'); function __construct(){ //SET UP CONNECTION AND TABLES } }; class report{ function __construct ($params = array(), $db, $user) { //Error checking/handling trimed //$db is the database object we created $this->db = $db; //$this->user is the user object for the logged in user $this->user = $user; $this->reportCreate(); } public function setPermission($permissionId = 1) { //Note the $this->db is this the best practise solution? $this->db->permission->find($permissionId) //Note the $this->user is this the best practise solution? $this->user->checkPermission(1) $data=array(); $this->db->reportpermission->insert($data) } };//end report I've been reading about using static classes and have just come across Singletons (though these appear to be passé already?) so what's current best practice for doing this?

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  • redoing object model construction to fit with asynchronous data fetching

    - by Andrew Patterson
    I have a modeled a set of objects that correspond with some real world concepts. TradeDrug, GenericDrug, TradePackage, DrugForm Underlying the simple object model I am trying to provide is a complex medical terminology that uses numeric codes to represent relationships and concepts, all accessible via a REST service - I am trying to hide away some of that complexity with an object wrapper. To give a concrete example I can call TradeDrug d = Searcher.FindTradeDrug("Zoloft") or TradeDrug d = new TradeDrug(34) where 34 might be the code for Zoloft. This will consult a remote server to find out some details about Zoloft. I might then call GenericDrug generic = d.EquivalentGeneric() System.Out.WriteLine(generic.ActiveIngredient().Name) in order to get back the generic drug sertraline as an object (again via a background REST call to the remote server that has all these drug details), and then perhaps find its ingredient. This model works fine and is being used in some applications that involve data processing. Recently however I wanted to do a silverlight application that used and displayed these objects. The silverlight environment only allows asynchronous REST/web service calls. I have no problems with how to make the asychhronous calls - but I am having trouble with what the design should be for my object construction. Currently the constructors for my objects do some REST calls sychronously. public TradeDrug(int code) { form = restclient.FetchForm(code) name = restclient.FetchName(code) etc.. } If I have to use async 'events' or 'actions' in order to use the Silverlight web client (I know silverlight can be forced to be a synchronous client but I am interested in asychronous approaches), does anyone have an guidance or best practice for how to structure my objects. I can pass in an action callback to the constructor public TradeDrug(int code, Action<TradeDrug> constructCompleted) { } but this then allows the user to have a TradeDrug object instance before what I want to construct is actually finished. It also doesn't support an 'event' async pattern because the object doesn't exist to add the event to until it is constructed. Extending that approach might be a factory object that itself has an asynchronous interface to objects factory.GetTradeDrugAsync(code, completedaction) or with a GetTradeDrugCompleted event? Does anyone have any recommendations?

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  • Blob object not working properly even though the class is seralized

    - by GustlyWind
    I have class which is seralized and does convert a very large amount of data object to blob to save it to database.In the same class there is decode method to convert blob to the actual object.Following is the code for encode and decode of the object. private byte[] encode(ScheduledReport schedSTDReport) { byte[] bytes = null; try { ByteArrayOutputStream bos = new ByteArrayOutputStream(); ObjectOutputStream oos = new ObjectOutputStream(bos); oos.writeObject(schedSTDReport); oos.flush(); oos.close(); bos.close(); //byte [] data = bos.toByteArray(); //ByteArrayOutputStream baos = new ByteArrayOutputStream(); //GZIPOutputStream out = new GZIPOutputStream(baos); //XMLEncoder encoder = new XMLEncoder(out); //encoder.writeObject(schedSTDReport); //encoder.close(); bytes = bos.toByteArray(); //GZIPOutputStream out = new GZIPOutputStream(bos); //out.write(bytes); //bytes = bos.toByteArray(); } catch (Exception e) { _log.error("Exception caught while encoding/zipping Scheduled STDReport", e); } decode(bytes); return bytes; } /* * Decode the report definition blob back to the * ScheduledReport object. */ private ScheduledReport decode(byte[] bytes) { ByteArrayInputStream bais = new ByteArrayInputStream(bytes); ScheduledReport sSTDR = null; try { ObjectInputStream ois = new ObjectInputStream(bais); //GZIPInputStream in = new GZIPInputStream(bais); //XMLDecoder decoder = new XMLDecoder(in); sSTDR = (ScheduledReport)ois.readObject();//decoder.readObject(); //decoder.close(); } catch (Exception e) { _log.error("IOException caught while decoding/unzipping Scheduled STDReport", e); } return sSTDR; } The problem here is whenver I change something else in this class means any other method,a new class version is created and so the new version the class is unable to decode the originally encoded blob object. The object which I am passing for encode is also seralized object but this problem exists. Any ideas thanks

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  • Encapsulate update method inside of object or have method which accepts an object to update

    - by Tom
    Hi, I actually have 2 questions related to each other: I have an object (class) called, say MyClass which holds data from my database. Currently I have a list of these objects ( List < MyClass ) that resides in a singleton in a "communal area". I feel it's easier to manage the data this way and I fail to see how passing a class around from object to object is beneficial over a singleton (I would be happy if someone can tell me why). Anyway, the data may change in the database from outside my program and so I have to update the data every so often. To update the list of the MyClass I have a method called say, Update, written in another class which accepts a list of MyClass. This updates all the instances of MyClass in the list. However would it be better instead to encapulate the Update() method inside the MyClass object, so instead I would say foreach(MyClass obj in MyClassList) { obj.update(); } What is a better implementation and why? The update method requires a XML reader. I have written an XML reader class which is basically a wrapper over the standard XML reader the language natively provides which provides application specific data collection. Should the XML reader class be in anyway in the "inheritance path" of the MyClass object - the MyClass objects inherits from the XML reader because it uses a few methods. I can't see why it should. I don't like the idea of declaring an instance of the XML Reader class inside of MyClass and an MyClass object is meant to be a simple "record" from the database and I feel giving it loads of methods, other object instances is a bit messy. Perhaps my XML reader class should be static but C#'s native XMLReader isn't static.? Any comments would be greatly appreciated Thanks Thomas

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  • Izpack: Creating custom panels

    - by bguiz
    Hi, I am trying to create a custom panel for an IzPack installer. This means that I have to extend IzPanel. However, it appears that if I do this, the extended panel needs to be in the com.izforge.izpack.panels package. Then I found this post, which stipulates that: As such, you must include installer.jar from the lib folder of IzPack in the build path of your custom panel project. Your custom panel /must/ extend com.izforge.izpack.installer.IzPanel. Furthermore, it /must/ reside in the com.izforge.izpack.panels package. On top of it all, your build jar's name /must/ be the same as the unqualified name of your custom panel class. I take issue with the 1st and 4th points. They imply that I have to create an additional JAR file for each custom IzPanel that I create. Also, I would have to modify the IzPack installation by adding these JARs to one of its subdirectories. Is this article outdated (2008) and can it be safely ignored, or is this still true? If not how can I avoid this and simply have the extended IzPanel on the classpath instead? Thank you!

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  • Window Installer custom action BEFORE any validation

    - by Marc
    I wrote a Windows Installer custom action based on the tutorial found here: http://www.codeproject.com/kb/install/msicustomaction.aspx My custom action is killing a background process of a given name which could still be opened by the user. The reason is that I don't want users to see the warning that a given EXE is running and must be closed so that setup can continue. This works fine when the MSI passes through the UI sequence as the action is created in "InstallUISequence" table like in the tutorial. However, when the MSI is used silently (right-click and select repair or uninstall), then my custom action isn't executed of course. Where do I have to put my custom action so that it is executed immediately also when run silently? I tried adding it to "InstallExecuteSequence", but the 'app running' warning is still shown. I then tried lowering the sequence number of my custom action to 5, but this also didn't help. Note: I'm using Orca to modify an MSI generated from a Visual Studio setup project. I'm then using the transform file to apply it.

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  • Windows Installer custom action BEFORE any validation

    - by Marc
    I wrote a Windows Installer custom action based on the tutorial found here: http://www.codeproject.com/kb/install/msicustomaction.aspx My custom action is killing a background process of a given name which could still be opened by the user. The reason is that I don't want users to see the warning that a given EXE is running and must be closed so that setup can continue. This works fine when the MSI passes through the UI sequence as the action is created in "InstallUISequence" table like in the tutorial. However, when the MSI is used silently (right-click and select repair or uninstall), then my custom action isn't executed of course. Where do I have to put my custom action so that it is executed immediately also when run silently? I tried adding it to "InstallExecuteSequence", but the 'app running' warning is still shown. I then tried lowering the sequence number of my custom action to 5, but this also didn't help. Note: I'm using Orca to modify an MSI generated from a Visual Studio setup project. I'm then using the transform file to apply it.

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  • Email an image via custom url scheme

    - by Amaresh
    I am using custom url schemes. I can send string messages as parameters to my custom url and emailing this to any person. When any person opens this email attachment in device in it open my app installed in device with the passed parameters in my custom url. Similarly how to email an image via custom url and when any person opens this attachment the image is passed to my app in device. I tried to encode the image in base64 format and tried to append to my url,but not working. Any ideas?? Thanks in advance

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  • WPF Custom Control with Image problem

    - by user311883
    Hi all, I am quite new to WPF/XAML and I am currently facing a problem. I have a solution with two projects in it, the first project is a Custom Control Library with a custom Window form control inside. The second project is a WPF application using my custom window form. All work fine except for the form Icon. In the WPF application project I set my window icon property to "/ProjectTwoNameSpace;component/Resources/Images/Film.ico", and in the WPF custom control I try to show that image that way : <Image Grid.Column="0" Margin="3" Width="27" Height="27"> <Image.Source> <BitmapImage UriSource="{Binding Path=Icon}" /> </Image.Source> </Image> But it doesn't work, I get a error at runtime saying that the property UriSource or StreamSource must be set for my tag. Anyone can help me ? I think it's jsut a WPF newbie problem ^^

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  • Get all custom fields that belong to a certain box in Wordpress

    - by user252160
    How can I get all custom fields that belong to a certain box only. For example, I am using the "more fields" plugin which allows me to create boxes of custom fields for instance a box called "hotel features" with different custom fields as the particular features. Teh point is that when I extract meta data in the template, there is no way, known to me, how to get only the fields that belong to the "hotel features box", say. Please, help with suggestions

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  • flex custom events bubbling

    - by Rajeshbabu TRC
    Dear Richard Szalay, i go through your answers regarding bubbling, i want explore bubbling more. Please see my sample below <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" xmlns:view="com.view.*" > } ]] In my custom event class i set bubbling=true, cancelable=true I can understand from previous answer that bubbling only affects UI components; events fired from custom classes will not bubble, even if the bubbles argument is set to true. My question is how can i prevent panelClickHandler function got fired when i click button in the "Load" (custom component)?? pleas explain bubbling with good example ( like to have with custom event classes)?

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  • Wordpress show next 3 x number adjacent custom posts from existing

    - by user2463284
    On a single/detail Custom Post Page I would like to display a custom nav of li's or divs in a sidebar that displays both title, excerpt and permalink for the next 3 posts within the custom post series. So if we are on custom post 3 then it would show 4, 5, 6 in the sidebar. The closest I've found to this is :-= global $post; $current_post = $post; // remember the current post for($i = 1; $i <= 3; $i++){ $post = get_previous_post(); // this uses $post->ID setup_postdata($post); // do your stuff here the_title(); } $post = $current_post; // restore Problem is this only shows the first next post and I need to show 3. Thanks Glennyboy

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  • NetBeans create and instantiate programatically custom swing widgets

    - by RenegadeAndy
    Hey! I have a problem I know how I would solve easily developing under eclipse - but not so easily developing under net beans. I want to create a custom swing widget - which I can instantiate by code as many as I need and attach them to my main panel. I have developed the rest of the GUI using the GUIBuilder. The problem is - im not entirely sure how to do this. Say I got 20 results back from a web service, I would wana loop round - and add 20 of these custom swing widgets - the custom swing widgets would look as follows : :Picture: :Label: :Label: Can anybody please help me, im not entirely sure how to do the custom widget either! Thanks in advance for any support. Andy

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  • C# custom control: Use internal content as Text field

    - by Ed Woodcock
    I'm creating a custom control, and I want to get all the stuff within the tags and use it as a string Text field on my control: i.e. <custom:control ID="C" runat="server">This text should go into the text property</custom:control> Does anyone know how to achieve this? I've tried the following attributes on my text field (copied from the Literal control) but it doesn't seem to work! [DefaultValue(""), Bindable(true), Localizable(true)]

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  • Using Zope object unique id ( _p_oid ) to access object itself

    - by Alex M
    Every Zope object has it's own unique id ( _p_oid ). To convert it into integer value: from Shared.DC.xml.ppml import u64 as decodeObjectId oid = decodeObjectId(getattr(<Object instance>, '_p_oid')) Is it possible to get object itself having it's _p_oid? I tried this: from ZODB.utils import p64 object = <RootObject instance>._p_jar[p64(oid)] But it seems it's a wrong way

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  • Custom 403 Error page not showing

    - by Rahul Sekhar
    I want to restrict access to certain folders (includes, xml and logs for example) and so I've given them 700 permissions, and all files within them 600 permissions. Firstly, is this the right approach to restrict access? I have a .htaccess file in my root that handles rewriting and error documents. There are two pages in the root - 403.php and 404.php - for 403 and 404 errors. And I have these rules added to my .htaccess file: ErrorDocument 404 /404.php ErrorDocument 403 /403.php Now, the 404 page works just fine. The 403 page does not show when I try to access the 'includes' folder - I get the standard apache 403 error page instead, saying 'Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.' However, when I try going to the .htaccess file (in the web root) in my browser, I get my custom 403 error page. Why is this happening?

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