SimplePieModel.java :  » Ajax » zk » org » zkoss » zul » Java Open Source

/* SimplePieModel.java

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

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

{{IS_RIGHT
  This program is distributed under LGPL Version 3.0 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 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 static final long serialVersionUID = 20091008183556L;
  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);
  }
}