ERXRepeatingTable.java

/*
 * Copyright (C) NetStruxr, Inc. All rights reserved.
 *
 * This software is published under the terms of the NetStruxr
 * Public Software License version 0.5, a copy of which has been
 * included with this distribution in the LICENSE.NPL file.  */
package er.extensions.components;

import com.webobjects.appserver.WOComponent;
import com.webobjects.appserver.WOContext;
import com.webobjects.foundation.NSArray;
import com.webobjects.foundation.NSMutableArray;

/**
 * Useful when given a list of n items and you want to display m keys. This will
 * construct a table nxm and push the current indexes up though the bindings.
 * 
 * @binding list
 * @binding item
 * @binding repetetions
 * @binding index
 * @binding row
 * @binding col
 * @binding maxColumns
 * @binding cellBackgroundColor
 */
public class ERXRepeatingTable extends WOComponent {
	/**
	 * Do I need to update serialVersionUID?
	 * See section 5.6 <cite>Type Changes Affecting Serialization</cite> on page 51 of the 
	 * <a href="http://java.sun.com/j2se/1.4/pdf/serial-spec.pdf">Java Object Serialization Spec</a>
	 */
	private static final long serialVersionUID = 1L;

	public ERXRepeatingTable(WOContext aContext) {
		super(aContext);
	}

	@Override
	public boolean isStateless() {
		return true;
	}

	@Override
	public void reset() {
		_repeatingList = null;
		super.reset();
	}

	private NSMutableArray _repeatingList;

	public NSArray repeatingList() {
		if (_repeatingList == null) {
			_repeatingList = new NSMutableArray();
			NSArray list = (NSArray) valueForBinding("list");
			Integer numberOfRepetetions = (Integer) valueForBinding("repetitions");
			if (numberOfRepetetions == null) {
				numberOfRepetetions = (Integer) valueForBinding("repetetions");
			}
			for (int i = 0; i < numberOfRepetetions.intValue(); i++) {
				_repeatingList.addObjectsFromArray(list);
			}
		}
		return _repeatingList;
	}

}