Tapestry Deli

example.application

<application name="example">
    <description>Example Application</description>

    <library id="base" specification-path="/org/mb/tapestry/base/base.library"/>
    <library id="checkboxes" specification-path="/org/mb/tapestry/checkboxes/checkboxes.library"/>
</application>

Home.html

<span jwcid="$content$">

    <body jwcid="@Body">

    <!-- Use of the If, Else, and For components outside a form -->
    <span jwcid="@base:If" condition="true">The outer condition is true</span>
    <span jwcid="@base:Else">The outer condition is false</span>

    <table>    
    <tr jwcid="loop@base:For" source="ognl: { 'Red', 'Green', 'Blue' }">
        <td><span jwcid="@Insert" value="ognl:components.loop.value"/></td>
    </tr>
    </table>
    
    <br>
    <hr>
        
    <!-- Use of the If, Else, and For components inside a form -->
    <!-- Hidden fields are automatically generated and stale links do not occur -->
    <span jwcid="@Form">
        
        <span jwcid="@base:If" condition="false">The inner condition is true</span>
        <span jwcid="@base:Else">The inner condition is false</span>
    
        <span jwcid="@checkboxes:CheckboxGroup">
        <table>
            <tr>
                <th><span jwcid="@checkboxes:ControlCheckbox"/></th>
                <th>Colors</th>
            </tr>
            
            <tr jwcid="cycle@base:For" source="ognl:colors" value="ognl:color" convertor="ognl:convertor">
                <td><span jwcid="@checkboxes:ControlledCheckbox" selected="ognl:selected"/></td>
                <td><span jwcid="@Insert" value="ognl:components.cycle.value"/></td>
            </tr>
        </table>
        </span>
                    
        <span jwcid="@Submit"/>
    </span>
    
    </body>
    
</span>

Home.page

<page-specification class="org.mb.tapestry.test.Home">
    <property-specification name="color" type="java.lang.String"/>
    <property-specification name="colorSet" type="java.util.Set" 
     initial-value="new java.util.HashSet()"/>
</page-specification>

Home.java

package org.mb.tapestry.test;

import java.util.Random;
import java.util.Set;

import org.apache.tapestry.contrib.table.model.IPrimaryKeyConvertor;
import org.apache.tapestry.html.BasePage;

public abstract class Home extends BasePage implements IPrimaryKeyConvertor
{
	public abstract String getColor();
	public abstract Set getColorSet();

	private String[] _colors;
	
	protected void initialize() {
		// shuffle the colors -- the For component should work fine even so
		_colors = new String[] { "White", "Green", "Red" };
		int len = _colors.length;
		Random rand = new Random();
		for (int i = 0; i < len; i++) {
			int idx = rand.nextInt(len);
			String color = _colors[i];
			_colors[i] = _colors[idx];
			_colors[idx] = color;
		}
	}
	
	public String[] getColors()
	{
		return _colors;
	}
	
	public boolean isSelected()
	{
		return getColorSet().contains(getColor());
	}
	
	public void setSelected(boolean selected)
	{
		if (selected)
			getColorSet().add(getColor());
		else
			getColorSet().remove(getColor());
	}

	public IPrimaryKeyConvertor getConvertor()
	{
		return this;
	}
	
	/**
	 * @see org.apache.tapestry.contrib.table.model.IPrimaryKeyConvertor#getPrimaryKey(java.lang.Object)
	 */
	public Object getPrimaryKey(Object objValue) {
		return "XXX" + objValue;
	}

	/**
	 * @see org.apache.tapestry.contrib.table.model.IPrimaryKeyConvertor#getValue(java.lang.Object)
	 */
	public Object getValue(Object objPrimaryKey) {
		return ((String) objPrimaryKey).substring(3);
	}
}