Thread: [Webwork-user] Name collision

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Rickard, 

To try and explain this clearer I will denote jsp params by enclosing them in *'ss.

I am having some problems implementing selectmap.jsp using *key* and *value* as variables.  The problem is when the *key* has the same name as *name*.  This causes every option to be CHECKED.  This is because I can't figure out a way to explicitly access a parent property while at a child level.  The only way I know how is to cause the name to miss at the child level.

What I'm looking for is something like <webwork:property name="../$name"/> or <webwork:property name="/$name">.  IIRC, this is how its done in XSLT.

I was able to change one of the attribute names to get the example to work, but it may be an issue with with others.

Following is the actual code that is causing the problem:

I have added this class to test a collection with selectmap.jsp that looks like this:

===========================================================

/*
 * WebWork, Web Application Framework
 *
 * Distributable under LGPL license.
 * See terms of license at opensource.org
 */
package webwork.test;

import java.util.List;
import java.util.ArrayList;
import java.util.StringTokenizer;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.BufferedReader;
import java.io.IOException;

import webwork.ActionSupport;

/**
 *	A list of books
 *      
 *	@see <related>
 *	@author <firstname> <lastname> (<email>)
 *	@version $Revision: 1.2 $
 */
public class BookList
   extends ActionSupport
{
   // Attributes ----------------------------------------------------
   static List books;

   static
   {
      // This never changes, so we do it once only
      books = new ArrayList();

   class Book
   {
	   String title;
	   String author;
	   String publisher;

	   public String getTitle()
	   {
	      return title;
	   }

	   public void setTitle(String title)
	   {
	      this.title = title;
	   }

	   public String getAuthor()
	   {
	      return author;
	   }

	   public void setAuthor(String author)
	   {
	      this.author = author;
	   }

	   public String getPublisher()
	   {
	      return publisher;
	   }

	   public void setPublisher(String publisher)
	   {
	      this.publisher = publisher;
	   }
   }

      // We read the values from a file so that it is easy to change
      try
      {
         InputStream resource = BookList.class.getResourceAsStream("books.txt");
         BufferedReader in = new BufferedReader(new InputStreamReader(resource));
         String bookInfo;
         while ((bookInfo = in.readLine()) != null)
         {
            StringTokenizer tokens = new StringTokenizer(bookInfo, ",");
            Book book = new Book();
            book.setTitle(tokens.nextToken());
            book.setAuthor(tokens.nextToken());
            book.setPublisher(tokens.nextToken());
            books.add(book);
         }
         in.close();   
      } catch (IOException e)
      {
         e.printStackTrace(System.err);
         System.err.println("Could not read list of books");
      }
   }

   // Public --------------------------------------------------------
   public List getBooks()
   {
      return books;
   }

}

===========================================================

I also added setAuthor() and getAuthor() to FormTestForm but didn't include them here (obvious implemention).  

===========================================================

<%@ taglib uri="webwork" prefix="webwork" %>

<jsp:include page="/template/standard/controlheader.jsp" flush="true"/>

		<select name="<%=request.getParameter("name")%>">
			<webwork:iterator name="$list">
				<option  
						 value="<webwork:property name="$key"/>"
				         <webwork:equals name="$key" value="$name">SELECTED</webwork:equals> >
						<webwork:property name="$value"/>
				</option>
			</webwork:iterator>
		</select>

<jsp:include page="/template/standard/controlfooter.jsp" flush="true"/>

===========================================================

Added this to formtest.jsp:

===========================================================

	<jsp:include page="BookList.action?result=/template/standard/selectmap.jsp" flush="true">
	  <jsp:param name="label" value="Book:"/>
	  <jsp:param name="name" value="author"/>
	  <jsp:param name="list" value="books"/>
	  <jsp:param name="key" value="author"/>
	  <jsp:param name="value" value="title"/>
	</jsp:include>

Later,

Maurice

Thread: [Webwork-user] Name collision

webwork-user