screenoptionlabeltag.java

j2ee源码

/*
 * Created on 2005/12/5
 */
package com.leeman.common.web.ui.tags;

import java.util.ArrayList;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.tagext.TagSupport;

import org.apache.commons.beanutils.PropertyUtils;

import com.leeman.common.web.ui.ScreenOption;

/**
 * @author Dennis
 */
public class ScreenOptionLabelTag extends TagSupport{
	
	private String listId = null;
	private String name = null;
	private String valueId = null;
	private String value = null;
	private String property = null;
	
	public int doEndTag() throws javax.servlet.jsp.JspException{
		try {
			HttpServletRequest request =(HttpServletRequest)pageContext.getRequest();
			
			Object formBean = request.getAttribute(name);
			
			ArrayList list = (ArrayList)PropertyUtils.getSimpleProperty(formBean, listId);
			
			String optionValue = null;
			
			if (valueId != null && value != null){
				throw new Exception("either valueId and value is allowed.");
			}			
			if (valueId != null){
				if (property != null){
					Object pageObj = pageContext.getAttribute(valueId);
					optionValue = (String)PropertyUtils.getSimpleProperty(pageObj, property);
				}
				else
				{
					int first = valueId.indexOf("(");
					int second = valueId.indexOf(")");
					if (first > 0 && second > first){
						optionValue = (String)PropertyUtils.getMappedProperty(formBean, valueId);
					}
					else{
						optionValue = (String)PropertyUtils.getSimpleProperty(formBean, valueId);
					}
				}				
			}
			else{
				optionValue = value;
			}
			int index = -1;
			for (int i=0; i <list.size(); i++)
			{
				ScreenOption so = (ScreenOption)list.get(i);
				if (so.getValue() != null){
					if (so.getValue().equals(optionValue))
					{
						index = i;
						break;
					}
				}
			}
			
			if (index >= 0)
			{
				ScreenOption opt = (ScreenOption)list.get(index);
				String label = opt.getLabel();
				if (label != null){
					pageContext.getOut().print(label);
				}
			}
		} catch (Exception e)
		{
			throw new javax.servlet.jsp.JspException("Error processing ScreenOptionLabelTag.doEndTag(): " + e.toString());
		}
		return EVAL_PAGE;
	}
	/**
	 * @return
	 */
	public String getListId() {
		return listId;
	}

	/**
	 * @return
	 */
	public String getValueId() {
		return valueId;
	}

	/**
	 * @param string
	 */
	public void setListId(String string) {
		listId = string;
	}

	/**
	 * @param string
	 */
	public void setValueId(String string) {
		valueId = string;
	}

	/**
	 * @return
	 */
	public String getValue() {
		return value;
	}

	/**
	 * @param string
	 */
	public void setValue(String string) {
		value = string;
	}

	/**
	 * @return
	 */
	public String getName() {
		return name;
	}

	/**
	 * @param string
	 */
	public void setName(String string) {
		name = string;
	}

	/**
	 * @return
	 */
	public String getProperty() {
		return property;
	}

	/**
	 * @param string
	 */
	public void setProperty(String string) {
		property = string;
	}

}