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Written By : ISHTEK
Title :
Struts2

Description :
Tags such as IF Iterator Tags
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Title :
Struts Eclipse MVC

Description :
Step by step demonstration
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Written By : Girish
Title :
Struts Tiles I18N Example

Description :
Code with Sample Action
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Written By : ISHTEK
Title :
Struts2 questions

Description :
open for discussion
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Title :
Struts2 Tiles Example

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with Code and article
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Title :
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with code explained article
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Title :
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Description :
Tutorial
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Tags/Keywords : Struts, Struts2 Tutorial, Struts 2 Example, Struts2
Author : ISHTEK
Date (Year/Month/Date): 2010-05-29
Example using Struts2 Plugin for DOJO - Tree Structure from a POJO Object Graph

Please be informed that NONE of the design/code/matter from this page is claiming to be some
sort of best practice and we DO NOT expect any of our visitor/reader of this page to assume
this as some sort of best practice for any context and should not be using this as it is
without appropriate evaluation.
This page intends only to provide bits and pieces of known ways  for doing some sort of example
and may not be fit for any other purpose.

In spite of all precautions taken to provide accurate and avoid any typo in these pages,
there might be some issues like grammatical mistakes and typo being observed in these pages,
We extend our sincerest apologies for the same.



There could be many ways of creating Tree structure while working
with DOJO, Struts2 Plugin for DOJO.

In this example I shall try to cover a very simple way of putting
various pieces of code together to come up with a Tree Layout for
displaying set of Books as a case study.

In this example this particular Tree structure will be formed out
of a dynamically populated object at server side.

This object will have a parent-child association with multiple instances
of the same class as child to the root node.

This means, if Book is a case study class in this example, then it
can have other Book instances as child stored inside the parent Book
object with a data type as List.

Book.java
package example;
import java.util.List;

public class Book
{
  private String bookId;
  private String bookName;
  private List<Book> booksList;

  public void setBookId(String bookId) {
	  this.bookId = bookId;
  }
  public String getBookId() {
	  return this.bookId;
  }
  public void setBookName(String bookName) {
	  this.bookName = bookName;
  }
  public String getBookName() {
	  return this.bookName;
  }
  public void setBooksList(List booksList) {
	  this.booksList = booksList;
  }
  public List<Book> getBooksList() {
	  return this.booksList;
  }

}


Now, the actual Tree widget values will be mapped to this Book instance
that is created within a method of this example Action class, as follows:

BooksTreeAction.java
package example;
import java.util.List;
import java.util.ArrayList;

import com.opensymphony.xwork2.ActionSupport;

public class BooksTreeAction extends ActionSupport
{
    public Book getBooksTree() {

      Book bk = new Book();
      bk.setBookId("BK001");
      bk.setBookName("Java Books");

      Book bk1 = new Book();
      bk1.setBookId("C001");
      bk1.setBookName("Books");
      List list = new ArrayList();
      list.add(bk);
      bk1.setBooksList(list);

      return bk1;
   }
}


In order to make this example work, it is needed to complete
action mapping in struts.xml file and writing the appropriate
JSP file as mentioned in ths action result.

struts.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
    <package name="dojo-tree-example1" namespace="/example1"
                 extends="struts-default">
        <action name="tree-example1" class="example.BooksTreeAction">
                <result>/sample.jsp</result>
        </action>
    </package>

</struts>


and the sample.jsp file

<%@ taglib uri="/struts-dojo-tags" prefix="s2d"%>
<html>
<head><title></title>
<s2d:head cache="true"/>
</head>
<body>
<div>
  <s2d:tree id="treeOfBooks" rootNode="%{booksTree}" 
            nodeIdProperty="bookId" nodeTitleProperty="bookName" 
            childCollectionProperty="booksList"/>

</div>
</body>
</html>


This rootNode (value of this attribute is booksTree) should be inline
with the getter method name in the action mapping which is getBooksTree
in this case. Other attributes of the tree tag are pretty straight 
forward to co-relate.

In order to test this example, the URL is as follows:

http://localhost:8080/struts2-and-dojo/example1/tree-example1

where localhost being the local machine and 8080 being the Tomcat
web server listening port for this example's runtime environment.
example1  being the namespace and tree-example1 being the action
name.

Hope this helps.

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