simplepiemodel.java

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/* SimplePieModel.java

{{IS_NOTE
	Purpose:
		
	Description:
		
	History:
		Thu Aug 14 11:20:14     2006, Created by henrichen
}}IS_NOTE

Copyright (C) 2006 Potix Corporation. All Rights Reserved.

{{IS_RIGHT
	This program is distributed under GPL Version 2.0 in the hope that
	it will be useful, but WITHOUT ANY WARRANTY.
}}IS_RIGHT
*/
package org.zkoss.zul;

import org.zkoss.lang.Objects;
import org.zkoss.zul.event.ChartDataEvent;
import org.zkoss.zul.event.ChartDataListener;

import org.jfree.data.general.*;

import java.util.Map;
import java.util.List;
import java.util.HashMap;
import java.util.Iterator;
import java.util.ArrayList;
import java.util.Collection;

/**
 * A Pie chart data model implementation of {@link PieModel}.
 * Piechart model is an one series of (Category, value) data objects.
 *
 * @author henrichen
 * @see PieModel
 * @see Chart
 */
public class SimplePieModel extends AbstractChartModel implements PieModel {
	private List _categoryList = new ArrayList(13);
	private Map _categoryMap = new HashMap(13);
	
	//-- PieModel --//
	public Comparable getCategory(int index) {
		return (Comparable) _categoryList.get(index);
	}

	public Collection getCategories() {
		return _categoryList;
	}
	
	public Number getValue(Comparable category) {
		return (Number)_categoryMap.get(category);
	}

	public void setValue(Comparable category, Number value) {
		if (!_categoryMap.containsKey(category)) {
			_categoryList.add(category);
		} else {
			Number ovalue = (Number)_categoryMap.get(category);
			if (Objects.equals(ovalue, value)) {
				return;
			}
		}
		_categoryMap.put(category, value);
		fireEvent(ChartDataEvent.CHANGED, null, category);
	}
	
	public void removeValue(Comparable category) {
		_categoryMap.remove(category);
		_categoryList.remove(category);
		fireEvent(ChartDataEvent.REMOVED, null, category);
	}
	
	public void clear() {
		_categoryMap.clear();
		_categoryList.clear();
		fireEvent(ChartDataEvent.REMOVED, null, null);
	}
}