simplexymodel.java

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/* SimpleXYModel.java

{{IS_NOTE
	Purpose:
		
	Description:
		
	History:
		Thu Aug 14 11:30:51     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.xy.*;

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 XY data model implementation of {@link XYModel}.
 * A XY model is an N series of (X, Y) data objects .
 *
 * @author henrichen
 * @see XYModel
 * @see Chart
 */
public class SimpleXYModel extends AbstractChartModel implements XYModel {
	private Map _seriesMap = new HashMap(13); //(series, SimplePieModel)
	private List _seriesList = new ArrayList(13);
	private boolean _autoSort = true;
	
	//-- XYModel --//
	public Comparable getSeries(int index) {
		return (Comparable)_seriesList.get(index);
	}
	
	public Collection getSeries() {
		return _seriesList;
	}
	
	public int getDataCount(Comparable series) {
		final List xyPairs = (List) _seriesMap.get(series);
		return xyPairs != null ? xyPairs.size() : 0;
	}

	public Number getX(Comparable series, int index) {
		final List xyPairs = (List) _seriesMap.get(series);
		
		if (xyPairs != null) {
			return ((XYPair)xyPairs.get(index)).getX();
		}
		return null;
	}

	public Number getY(Comparable series, int index) {
		final List xyPairs = (List) _seriesMap.get(series);
		
		if (xyPairs != null) {
			return ((XYPair)xyPairs.get(index)).getY();
		}
		return null;
	}
	
	public void addValue(Comparable series, Number x, Number y) {
		List xyPairs = (List) _seriesMap.get(series);
		if (xyPairs == null) {
			xyPairs = new ArrayList(13);
			_seriesMap.put(series, xyPairs);
			_seriesList.add(series);
		}
		xyPairs.add(new XYPair(x, y));
		fireEvent(ChartDataEvent.CHANGED, series, null);
	}

	public void setAutoSort(boolean auto) {
		_autoSort = auto;
	}

	public boolean isAutoSort() {
		return _autoSort;
	}
	
	public void removeSeries(Comparable series) {
		_seriesMap.remove(series);
		_seriesList.remove(series);
		fireEvent(ChartDataEvent.REMOVED, (String)series, null);
	}
	
	public void removeValue(Comparable series, int index) {
		List xyPairs = (List) _seriesMap.get(series);
		if (xyPairs == null) {
			return;
		}
		xyPairs.remove(index);
		fireEvent(ChartDataEvent.REMOVED, series, null);
	}
	
	public void clear() {
		_seriesMap.clear();
		_seriesList.clear();
		fireEvent(ChartDataEvent.REMOVED, null, null);
	}
	
	//-- internal class --//
	private static class XYPair {
		private Number _x;
		private Number _y;
		
		private XYPair(Number x, Number y) {
			_x = x;
			_y = y;
		}
		
		private Number getX() {
			return _x;
		}
		
		private Number getY() {
			return _y;
		}
	}
}