stanza.java

XML 解释器（字符串变量）： 通常的XML解释

package com.hiany.xml;

import java.util.HashMap;
import java.util.Set;

import org.apache.log4j.Logger;

/**
 * XML节点对象，代表XML的一个节点 如“<message from="1" to="2">hello,world!</message>”
 * 
 */
public class Stanza {
	/**
	 * 部分
	 */
	public class Part {
		/**
		 * 前
		 */
		public static final int FRONT = 1;
	
		/**
		 * 中
		 */
		public static final int BODY = 2;
	
		/**
		 * 后
		 */
		public static final int BACK = 3;
	}

	static Logger logger = Logger.getLogger(Stanza.class);

	/**
	 * 节点名
	 */
	private String name;

	/**
	 * 属性
	 */
	private HashMap<String, String> attributes = new HashMap<String, String>();

	/**
	 * 文本
	 */
	private String text = "";

	/**
	 * XML节点是否已经闭合 注：若未闭合，则text值为NULL。
	 */
	private boolean closed;

	/**
	 * @param attribute
	 *            The attribute to get.
	 */
	public String getAttribute(String attr) {
		return this.attributes.get(attr);
	}

	/**
	 * @param attribute
	 *            The attribute to set.
	 */
	public void setAttribute(String attr, String value) {
		this.attributes.put(attr, value);
	}

	/**
	 * @return Returns the text.
	 */
	public String getText() {
		return text;
	}

	/**
	 * @param text
	 *            The text to set.
	 */
	public void setText(String content) {
		this.text = content;
	}

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

	/**
	 * @param name
	 *            The name to set.
	 */
	public void setName(String name) {
		if (name != null) {
			this.name = name.toLowerCase();
		}
	}

	/**
	 * @return Returns the closed.
	 */
	public boolean isClosed() {
		return closed;
	}

	/**
	 * @param closed
	 *            The closed to set.
	 */
	public void setClosed(boolean completed) {
		this.closed = completed;
	}

	/**
	 * 合并两个Stanza <br />
	 * 合并前提：两个Stanza的name必须相同，this必须是未闭合的，secondhalf必须是闭合的。<br />
	 * 合并规则：属性取this的，text取secondhalf的，设置返回的Stanza（也是this）为闭合。
	 * 
	 * @param secondhalf
	 * @return this
	 */
	public Stanza merge(Stanza secondhalf) {
		if (this.getName().equals(secondhalf.getName()) && !this.isClosed()
				&& secondhalf.isClosed()) {
			this.setText(secondhalf.getText());
			this.setClosed(true);
		}

		return this;
	}

	/**
	 * @return the attributes
	 */
	public Set getAttributeNames() {
		return attributes.keySet();
	}
}