JEXLTooltipTemplate.java

/*
 * JavaXYQ Source Code
 * by kylixs
 * at 2010-5-29
 * please visit http://javaxyq.googlecode.com
 * or mail to kylixs@qq.com
 */
package com.javaxyq.ui;

import java.util.HashMap;
import java.util.Map;

import org.apache.commons.jexl2.JexlContext;
import org.apache.commons.jexl2.JexlEngine;
import org.apache.commons.jexl2.MapContext;
import org.apache.commons.jexl2.UnifiedJEXL;
import org.apache.commons.jexl2.UnifiedJEXL.Expression;

import com.javaxyq.core.ApplicationHelper;
import com.javaxyq.core.Context;
import com.javaxyq.widget.Player;

/**
 * @author gongdewei
 * @date 2010-5-29 create
 */
public class JEXLTooltipTemplate implements TooltipTemplate {

	private Context context;
	private Map<String,Expression> expressions;
	
	public JEXLTooltipTemplate(Context context) {
		super();
		this.context = context;
		expressions = new HashMap<String, Expression>();
	}

	@Override
	public String getTooltipText(String tpl) {
		Expression expression = expressions.get(tpl);
		if (expression == null) {
			try {
				JexlEngine jexl = new JexlEngine();
		        UnifiedJEXL ujexl = new UnifiedJEXL(jexl);
		        expression = ujexl.parse(tpl);
		        expressions.put(tpl, expression);
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
		if (expression != null) {
			Map<String, Object> properties = null;
			Player player = context.getPlayer();
			if(player != null) {
				properties = ApplicationHelper.getApplication().getDataManager().getProperties(player);
			}else {
				properties = new HashMap<String, Object>();
			}
	        JexlContext jexlcontext = new MapContext(properties);
	        String result = expression.evaluate(jexlcontext).toString();
			return result;
		}
		return null;
	}

}