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• Is there an "opposite" to the null coalescing operator? (…in any language?)

  - by Jay

  null coalescing translates roughly to return x, unless it is null, in which case return y I often need return null if x is null, otherwise return x.y I can use return x == null ? null : x.y; Not bad, but that null in the middle always bothers me -- it seems superfluous. I'd prefer something like return x :: x.y;, where what follows the :: is evaluated only if what precedes it is not null. I see this as almost an opposite to null coalescence, kind of mixed in with a terse, inline null-check, but I'm [almost] certain that there is no such operator in C#. Are there other languages that have such an operator? If so, what is it called? (I know that I can write a method for it in C#; I use return NullOrValue.of(x, () => x.y);, but if you have anything better, I'd like to see that too.)

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• Java Copy/Paste org.w3c.dom.Node between two running copies of the same program

  - by Jay

  I have a program that shows a tree representation of an XML file. Using a number of sources online I have Copy/Paste within a single instance of the program working. I am using the system Clipboard. What I need though is to be able to copy a node from one instance of the program and paste to a different instance of the same program. I have tried a number of different options, all resulting in the same behavior. When pasting from within the same application the clipboardContent contains a "transferable" object with the correct data along with an isLocal set to "true". When I perform the copy and then attempt the paste from another instance of the same program running the clipboardContent contains a "flavorsToData" HashMap and "flavors" values, the check for isDataFlavorSupported fails (never hits my custom class that represents the new flavor). I have tried using different values for the requestor object in the getContents() call. Likewise I have tried a few different ClipboardOwners for the setContent() call. Neither seem to change the behavior in any way. I am sorely tempted to convert the node that is being copied back into a textual XML format, and then on the paste convert back to the DOM model, but would rather not if possible. This class is used to define the DataFlavor and transferable object: import java.awt.datatransfer.*; import org.w3c.dom.Node; public class NodeCopyPaste implements Transferable { static public DataFlavor NodeFlavor; private DataFlavor [] supportedFlavors = {NodeFlavor}; public Node aNode; public NodeCopyPaste (Node paraNode) { aNode = paraNode; try { NodeFlavor = new DataFlavor (Class.forName ("org.w3c.dom.Node"), "Node"); } catch (ClassNotFoundException e) { e.printStackTrace (); } } public synchronized DataFlavor [] getTransferDataFlavors () { return (supportedFlavors); } public boolean isDataFlavorSupported (DataFlavor nodeFlavor) { return (nodeFlavor.equals (NodeFlavor)); } public synchronized Object getTransferData (DataFlavor nFlavor) throws UnsupportedFlavorException { if (nFlavor.equals (NodeFlavor)) return (this); else throw new UnsupportedFlavorException (nFlavor); } public void lostOwnership (Clipboard parClipboard, Transferable parTransferable) { } } I define a Clipboard object from the main application screen and then tie in copy and paste handlers for the mouse clicks: During initialization I assign the system clipboard: clippy = Toolkit.getDefaultToolkit().getSystemClipboard(); Copy Handler Node copyNode = ((CLIInfo) node.getUserObject()).DOMNode.cloneNode(true); NodeCopyPaste contents = new NodeCopyPaste(copyNode); clippy.setContents (contents, null); Paste Handler Transferable clipboardContent = clippy.getContents (null); Node clonedNode = null; if ((clipboardContent != null) && (clipboardContent.isDataFlavorSupported (NodeCopyPaste.NodeFlavor))) { try { NodeCopyPaste tempNCP = (NodeCopyPaste) clipboardContent.getTransferData (NodeCopyPaste.NodeFlavor); clonedNode = tempNCP.aNode.cloneNode(true); } catch (Exception e) { e.printStackTrace (); } Thanks!

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• How do I place widgets above and below a listview with Relative Layout

  - by Jay Askren

  I have a list view and want to put stuff both above(on the y axis) and below(y axis) it including images, text views, and a row of buttons. Below is a simplified version of what I am creating. Unfortunately the list covers(i.e. above on the z axis) the header so the header text is not visible instead of being underneath (on the y axis) <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="wrap_content" android:layout_height="wrap_content"> <TextView android:id="@+id/footer" android:text="footer" android:layout_height="wrap_content" android:layout_width="fill_parent" android:layout_alignParentBottom="true" /> <ListView android:id="@+id/list_view" android:layout_height="fill_parent" android:layout_width="fill_parent" android:layout_above="@id/footer" android:background="#ff9999ff"/> <TextView android:id="@+id/header" android:text="header" android:layout_height="wrap_content" android:layout_width="fill_parent" android:layout_alignParentTop="true" android:layout_above="@id/list_view" android:baselineAlignBottom="false" /> </RelativeLayout> Here is the corresponding Activity class: public class SampleListActivity extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.list_activity); } }

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• Why can't I send SOAP requests to Ebay finding API with this php?

  - by Jay

  This is my code: <?php error_reporting(E_ALL); //new instance of soapClient pointing to Ebay finding api $client = new SoapClient("http://developer.ebay.com/webservices/finding/latest/FindingService.wsdl"); //attach required parameters to soap message header $header_arr = array(); $header_arr[] = new SoapHeader("X-EBAY-SOA-MESSAGE-PROTOCOL", "SOAP11"); $header_arr[] = new SoapHeader("X-EBAY-SOA-SERVICE-NAME", "FindingService"); $header_arr[] = new SoapHeader("X-EBAY-SOA-OPERATION-NAME", "findItemsByKeywords"); $header_arr[] = new SoapHeader("X-EBAY-SOA-SERVICE-VERSION", "1.0.0"); $header_arr[] = new SoapHeader("X-EBAY-SOA-GLOBAL-ID", "EBAY-GB"); $header_arr[] = new SoapHeader("X-EBAY-SOA-SECURITY-APPNAME", "REMOVED"); $header_arr[] = new SoapHeader("X-EBAY-SOA-REQUEST-DATA-FORMAT", "XML"); $header_arr[] = new SoapHeader("X-EBAY-SOA-MESSAGE-PROTOCOL", "XML"); $test = $client->__setSoapHeaders($header_arr); $client->__setLocation("http://svcs.ebay.com/services/search/FindingService/v1");//endpoint $FindItemsByKeywordsRequest = array( "keywords" => "potter" ); $result = $client->__soapCall("findItemsByKeywords", $FindItemsByKeywordsRequest); //print_r($client->__getFunctions()); //print_r($client->__getTypes()); //print_r($result); ? And this is the error I receive: Fatal error: Uncaught SoapFault exception: [axis2ns2:Server] Missing SOA operation name header in C:\xampplite\htdocs\OOP\newfile.php:25 Stack trace: #0 C:\xampplite\htdocs\OOP\newfile.php(25): SoapClient-__soapCall('findItemsByKeyw...', Array) #1 {main} thrown in C:\xampplite\htdocs\OOP\newfile.php on line 25 It doesnt make sense, I have already set the operation name in the header of the request... Does anyone know what is wrong here?

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• I've Heard Global Variables Are Bad, What Alternative Solution Should I Use?

  - by Jay

  I've read all over the place that global variables are bad and alternatives should be used. In Javascript specifically, what solution should I choose. I'm thinking of a function, that when fed two arguments (function globalVariables(Variable,Value)) looks if Variable exists in a local array and if it does set it's value to Value, else, Variable and Value are appended. If the function is called without arguments (function globalVariables()) it returns the array. Perhaps if the function is fired with just one argument (function globalVariables(Variable)) it returns the value of Variable in the array. What do you think? I'd like to hear your alternative solutions and arguments for using global variables.

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• Unresolved External Symbol? error lnk2019

  - by jay

  Hello, I was wondering if anyone knew what this error meant. Thanks error LNK2019: unresolved external symbol "public: void __thiscall LinkedList,class std::allocator ::LocItem *::decreasekey(class PriorityList,class std::allocator ::LocItem * const &)" (?decreasekey@?$LinkedList@HPAVLocItem@?$PriorityList@HV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@@@@QAEXABQAVLocItem@?$PriorityList@HV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@@@Z) referenced in function "public: void __thiscall PriorityList,class std::allocator ::decreasekey(class PriorityList,class std::allocator ::Locator)" (?decreasekey@?$PriorityList@HV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@@QAEXVLocator@1@@Z)

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• Ho to make Histogram Normalize and Equalize in java using JAI library?

  - by Jay

  I m making App in java using Swing component and JAI library. I make histogram of black and white or gray scale image.Is this method of making histogram correct? iif it is correct then how can i do normalization and Equalization of histogram in my App in java using JAI library?my code is below. in my code i make BufferedImage object and then make and plot histogram of that image . enter code here import java.awt.Color; import java.awt.Graphics; import java.awt.image.BufferedImage; import java.io.IOException; import javax.media.jai.JAI; import javax.media.jai.PlanarImage; import javax.swing.*; public class FinalHistogram extends JPanel { static int[] bins = new int[256]; static int[] newBins = new int[256]; static int x1 = 0, y1 = 0; static PlanarImage image = JAI.create("fileload", "alp_finger.tiff"); static BufferedImage bi = image.getAsBufferedImage(); FinalHistogram(int[] pbins) { for (int i = 0; i < 256; i++) { bins[i] = pbins[i]; newBins[i] = 0; } repaint(); } @Override protected void paintComponent(Graphics g) { for (int i = 0; i < 256; i++) { g.drawLine(150 + i, 300, 150 + i, 300 - (bins[i] / 300)); if (i == 0 || i == 255) { String sr = new Integer((i)).toString(); g.drawString(sr, 150 + i, 305); } System.out.println("bin[" + i + "]===" + bins[i]); } } public static void main(String[] args) throws IOException { int[] sbins = new int[256]; int pixel = 0; int k = 0; for (int x = 0; x < bi.getWidth(); x++) { for (int y = 0; y < bi.getHeight(); y++) { pixel = bi.getRaster().getSample(x, y, 0); k = (int) (pixel / 256); sbins[k]++; //pixel = bi.getRGB(x, y) & 0x000000ff; //k=pixel; //int[] pixels = m_image.getRGB(0, 0, m_image.getWidth(), m_image.getHeight(), null, 0, m_image.getWidth()); //short currentValue = 0; //int red,green,blue; //for(int i = 0; i<pixels.length; i++){ //red = (pixels[i] >> 16) & 0x000000FF; //green = (pixels[i] >>8 ) & 0x000000FF; //blue = pixels[i] & 0x000000FF; //currentValue = (short)((red + green + blue) / 3); //Current value gives the average //Disregard the alpha //assert(currentValue >= 0 && currentValue <= 255); //Something is awfully wrong if this goes off... //m_histogramArray[currentValue] += 1; //Increment the specific value of the array //} } } JTabbedPane jtp = new JTabbedPane(); jtp.addTab("Histogram", new JScrollPane(new FinalHistogram(sbins))); JFrame frame = new JFrame(); frame.setSize(500, 500); frame.add(new JScrollPane(jtp)); frame.setVisible(true); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } }

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• Running time for Dijkstra's algorithm on a priority queue implemented by sorted list/array

  - by jay

  So I'm curious to know what the running time for the algorithm is on on priority queue implemented by a sorted list/array. I know for an unsorted list/array it is O((n^2+m)) where n is the number of vertices and m the number of edges. Thus that equates to O(n^2) time. But would it be faster if i used an sorted list/array...What would the running time be? I know extractmin would be constant time.

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• How do I debug an MPI program?

  - by Jay Conrod

  I have an MPI program which compiles and runs, but I would like to step through it to make sure nothing bizarre is happening. Ideally, I would like a simple way to attach GDB to any particular process, but I'm not really sure whether that's possible or how to do it. An alternative would be having each process write debug output to a separate log file, but this doesn't really give the same freedom as a debugger. Are there better approaches? How do you debug MPI programs?

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• Named ports in windows!

  - by Jay

  I wonder how stuff like this works in windows (xp and other that have telnet): Start-> Run -> cmd -> telnet <xyz.com> http Start-> Run -> cmd -> telnet <xyz.com> pop3 Start-> Run -> cmd -> telnet <xyz.com> smtp Are these "named" ports? Only windows knows that it has to substitute port numbers coz these are standard ports? Is there way I could create such a named port on windows? I would like something like this : telnet <xyz.com> oracle to translate to telnet <xyz.com> 1521

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• Fixing VBSCRIPT inaccurate mathematical results due to rounding

  - by jay

  Try running this in a .VBS file MsgBox(545.14-544.94) You get a neat little answer of 0.199999999999932! This rounding issue also occurs unfortunately in Sin(2 * pi) since VB can only ever see the (user defined) variable pi as accurate as 3.14159265358979. Is rounding it manually (and loosing accuracy) the only way to improve the result? What is the most effective way of dealing with this kind of problem?

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• Modified jQuery innerfade sluggish

  - by Jay Hankins

  HI. I am using the jQuery innerfade plugin to scroll through some images on my site. Innerfade is sluggish to move on Firefox 3.6.3, and IE 8. IE 8 is much worse than Firefox, and Chrome runs smoothly. Can you analyze my code to see what the problem is? I've used the modified innerfade from here: http://www.stylephp.com/2009/01/17/customizing-jquery-innerfade-plug-in-adding-controls-navigation-and-caption/ My sites are here: Without bg image: http://dl.dropbox.com/u/145908/doozie2/index.html With bg image: http://dl.dropbox.com/u/145908/doozie2/index2.html Removing my background image fixes the situation; it's not that big of a file. I don't understand why that is an issue. I am using a technique to resize the image to fit the browser window, as you can see in the CSS. Thanks so much. P.S. Sorry, I'm a new user so I can't post more than one link. Please copy and paste the address between <.

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• Full screen caller for Android

  - by jay

  Hi i am new to android. i want this functionality in my project i want when some one is calling me than i want fullscreen photo of that caller to be appeared in my screen means fullscreen caller id.so how can i place full screen photo at top of the incoming screen.. any example..? my be i should use broadcast receiver or something like that ?? Any sample code for this functionality ?? thanks jaimin.

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• Ruby Net::SMTP - Send email with bcc: recipients

  - by Jay Godse

  I would like to use Ruby Net::SMTP to send email. The routine send_message( msgstr, from_addr, *to_addrs ) works well in my code for sending email, but it is not clear from this API how to send email to a list of people that need to be blind copied (bcc:). Am I missing something, or is it just not possible with Net::SMTP?

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• Comma Seperated Values and LIKE php/mysql Troubles

  - by Jay

  The Set up This is more or less a follow up question to something I had previously posted regarding comma separated values (explode,implode). Here's the scenario which has been stomping me the last few days as I'm a noob--sorry for the lengthy post. I'm passing a variable via the url (index.php?id=variable), I then check the database to find the rows containing that variable using SELECT * FROM table WHERE column LIKE '%$variable%' I'm using the wildcards because the results are a comma separated value with the variable appearing multiple times in the database. So if we were assigning-- say schools to popular tv shows..my database is set up so that the user can assign more than one school to the tv show. IE. South Park-- fsu, nyu ,mit Archer -- harvard, nyu Index.php?id=nyu would display Sourth Park & Archer. The Problem Because I am using Like '%variable%' If I have the following: South Park--uark Archer--ua index.php?=ua Instead of just Archer showing, Southpark would also show. Which makes sense due to the wildcards...but can anyone think of a way to do this achieving the results I want?..Is there any way achieve more precise results using a comma separated value?..I'm completely stomped and will appreciate any help.

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• Unresolved External symbol

  - by jay

  Hello, I am getting a linking error, and I'm not sure what its referring to. Here is the error 1Main.obj : error LNK2019: unresolved external symbol "public: void __thiscall BinaryHeap,class std::allocator ,class Comp,class std::allocator ::insert(class Item,class std::allocator const &)" (?insert@?$BinaryHeap@V?$Item@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@@V?$Comp@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@@@@QAEXABV?$Item@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@@@Z) referenced in function "public: void __thiscall PriorityQueue,class std::allocator ::insertItem(int,class std::basic_string,class std::allocator const &)" (?insertItem@?$PriorityQueue@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@@QAEXHABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z) The code is rather long, however if you want me to post it I will. thanks

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• Oracle T4CPreparedStatement memory leaks?

  - by Jay

  A little background on the application that I am gonna talk about in the next few lines: XYZ is a data masking workbench eclipse RCP application: You give it a source table column, and a target table column, it would apply a trasformation (encryption/shuffling/etc) and copy the row data from source table to target table. Now, when I mask n tables at a time, n threads are launched by this app. Here is the issue: I have run into a production issue on first roll out of the above said app. Unfortunately, I don't have any logs to get to the root. However, I tried to run this app in test region and do a stress test. When I collected .hprof files and ran 'em through an analyzer (yourKit), I noticed that objects of oracle.jdbc.driver.T4CPreparedStatement was retaining heap. The analysis also tells me that one of my classes is holding a reference to this preparedstatement object and thereby, n threads have n such objects. T4CPreparedStatement seemed to have character arrays: lastBoundChars and bindChars each of size char[300000]. So, I researched a bit (google!), obtained ojdbc6.jar and tried decompiling T4CPreparedStatement. I see that T4CPreparedStatement extends OraclePreparedStatement, which dynamically manages array size of lastBoundChars and bindChars. So, my questions here are: Have you ever run into an issue like this? Do you know the significance of lastBoundChars / bindChars? I am new to profiling, so do you think I am not doing it correct? (I also ran the hprofs through MAT - and this was the main identified issue - so, I don't really think I could be wrong?) I have found something similar on the web here: http://forums.oracle.com/forums/thread.jspa?messageID=2860681 Appreciate your suggestions / advice.

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• Rails: Ajax: Changes Onload

  - by Jay Godse

  Hi. I have a web layout of a for that looks something like this <html> <head> </head> <body> <div id="posts"> <div id="post1" class="post" > <!--stuff 1--> </div> <div id="post2" class="post" > <!--stuff 1--> </div> <!-- 96 more posts --> <div id="post99" class="post" > <!--stuff 1--> </div> </div> </body> </html> I would like to be able to load and render the page with a blank , and then have a function called when the page is loaded which goes in and load up the posts and updates the page dynamically. In Rails, I tried using "link_to_remote" to update with all of the elements. I also tweaked the posts controller to render the collection of posts if it was an ajax request (request.xhr?). It worked fine and very fast. However the update of the blank div is triggered by clicking the link. I would like the same action to happen when the page is loaded so that I don't have to put in a link. Is there a Rails Ajax helper or RJS function or something in Rails that I could use to trigger the loading of the "posts" after the page has loaded and rendered (without the posts)? (If putsch comes to shove, I will just copy the generated JS code from the link_to_remote call and have it called from the onload handler on the body).

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• jquery addresses and live method

  - by Jay

  //deep linking $.fn.ajaxAnim = function() { $(this).animW(); $(this).html('<div class="load-prog">loading...</div>'); } $("document").ready(function(){ contM = $('#main-content'); contS = $('#second-content'); $(contM).hide(); $(contM).addClass('hidden'); $(contS).hide(); $(contS).addClass('hidden'); function loadURL(URL) { //console.log("loadURL: " + URL); $.ajax({ url: URL, beforeSend: function(){$(contM).ajaxAnim();}, type: "POST", dataType: 'html', data: {post_loader: 1}, success: function(data){ $(contM).html(data); $('.post-content').initializeScroll(); } }); } // Event handlers $.address.init(function(event) { //console.log("init: " + $('[rel=address:' + event.value + ']').attr('href')); }).change(function(event) { evVal = event.value; if(evVal == '/'){return false;} else{ $.ajax({ url: $('[rel=address:' + evVal + ']').attr('href'), beforeSend: function(){$(contM).ajaxAnim();}, type: "POST", dataType: 'html', data: {post_loader: 1}, success: function(data){ $(contM).html(data); $('.post-content').initializeScroll(); }}); } //console.log("change"); }) $('.update-main a, a.update-main').live('click', function(){ loadURL($(this).attr('href')); return false; }); $(".update-second a, a.update-second").live('click', function() { var link = $(this); $.ajax({ url: link.attr("href"), beforeSend: function(){$(contS).ajaxAnim();}, type: "POST", dataType: 'html', data: {post_loader: 1}, success: function(data){ $(contS).html(data); $('.post-content').initializeScroll(); }}); return false; }); }); I'm using jquery addresses to update content while maintaining a useful url. When clicking on links in a main nav, the url is updated properly, but when links are loaded dynamically with ajax, the url address function breaks. I have made 'click' events live, allowing for content to be loaded via dynamically loaded links, but I can't seem to make the address event listener live, but this seems to be the only way to make this work. Is my syntax wrong if I change this : $.address.change(function(event) { to this: $.address.live('change', function(event) { or does the live method not work with this plugin?

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• Suggestion for a Data Structure!

  - by Jay

  I have the following requirements for a data structure: Direct access to an element with the help of a key (Key will be an integer, range is also same as integer range) Avoid memory allocation in chunks (Allocate contigous memory for the data structure including the data) Should be able to grow the data structure size dynamically Which data structure would you suggest? Any pointers in the direction will also be of help.

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• Refresh/Reset View

  - by Jay

  Hi, I'm using MVP in WPF and I came across a design doubt and I would to get your opinion on this: At some point I need to refresh my view and perform the same initial queries, like when the view was loading. The view's DataContext is my presenter and I have a couple of collections and other variables that are bound to the view. When I need to refresh the view, I'm clearing the collections and the variables and setting the DataContext to null. After that I fetch new data, populate the collections and set the DataContext. Is this the best way to achieve this? The issue with this, is that i'm affraid that when my app grows bigger I forget to reset some variable...the ideal would be to reload the view again in some way without having to worry with the variables I have. Best regards.

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• Running a GWT application inside an IFRAME from an ASP.NET 3.5 app?

  - by Jay Stevens

  We are looking at integrating a full-blown GWT (Google Web Toolkit 2.0) application with an existing ASP.NET 3.5 application. My first gut reaction is that this is a horrible frankenstein idea. However, the customer has insisted that we use this application developed by a third-party. I have almost NO CONTROL over the development of the GWT app. My first thought is to actually attempt to embed this in an iFrame. Because GWT is running under Tomcat/Jakarta, it is hosted on a different server from the .NET app so the iFrame src will be to a URL on the other machine. I need to utilize our own ASP.NET authorization scheme to restrict access to the embedded GWT application. The GWT app also uses embedded java applets, which don't seem to be working right now inside the iframe. Any major problems with this approach that anyone can see? Will GWT work on an iframe while hosted on a different machine?

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• Bluray Burner in Java - Where to start?

  - by Jay

  Like the subject of this post suggests, I am looking at developing a suite like nero which helps burn bluray discs. I am kind of clueless as to where to start. Is there anything in Java API that lets you do this? If I were to start from scratch, would I need to start with the bluray disc spec? Are there any open source tools which are already doing this? I tried searching at sourceforge.net and found nothing useful. Any help is much appreciated.

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• OSLO, ANTLR or other parser grammar, for parsing QUERY EXPRESSION

  - by Jay Allard

  Greetings I'm working on a project that requires me to write queries in text form, then convert them to some easily processed nodes to be processed by some abiguous repository. Of everything there, the part I'm least interested is the part that converts the text to nodes. I'm hoping it's already done somewhere. Because I'm making stuff up as I go, I chose to use a LINQish expression syntax. from m in Movie select m.A, m.B I started parsing it manually and got the basics, but it's pretty cheesy. I'm looking for the better solution. I made some progress using MGrammar, but it would be nice if such a thing already existed. Does anyone know of anything that already does this? I looked for existing ANTLR templates, but no luck. Thanks for the help.

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• Oracle sample data problems

  - by Jay

  So, I have this java based data trasformation / masking tool, which I wanted to test out on Oracle 10g. The good part with Oracle 10g is that you get a load of sample schemas with half a million records in some. The schemas are : SH, OE, HR, IX and etc. So, I installed 10g, found out that the installation scripts are under ORACLE_HOME/demo/scripts. I customized these scripts a bit to run in batch mode. That solves one half of my requirement - to create source data for my testing my data transformation software. The second half of the requirement is that I create the same schemas under different names (TR_HR, TR_OE and so on...) without any data. These schemas would represent my target schemas. So, in short, my software would pick up data from a table in a schema and load it up in to the same table in a different schema. Now, I have two issues in creating my target schema and emptying it. I would like this in a batch job. But the oracle scripts you get, the sample schema names are not configurable. So, I tried creating a script, replacing OE with TR_OE, HR with TR_HR and so on. However, this approach is kind of irritating coz the sample schemas are kind of complicated in the way they are created; Oracle creates synonyms, views, materialized views, data types and lot of weird stuff. I would like the target schemas (TR_HR, TR_OE,...) to be empty. But some of the schemas have circular references, which would not allow me to delete data. The only work around seems to be removing certain foreign keys, deleting data and then adding the constraints back. Is there any easy way to all this, without all this fuss? I would need a complicated data set for my testing (complicated as in tables with triggers, multiple hierarchies.. for instance.. a child table that has children up to 5 levels, a parent table that refers to an IOT table and an IOT table that refers to a non-IOT table etc..). The sample schemas are just about perfect from a data set perspective. The only challenge I see is in automating this whole process of loading up the source schemas, and then creating the target schemas and emptying them. Appreciate your help and suggestions.

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