logitem.java

利用广度优先遍历搜索一定范围内的所有网页,可用于建立搜索引擎和查找网络错误.

package log;



import WebCrawler.*;

public class LogItem {
	private Link source;
	private Link target;
	private String visited;
	
	public LogItem( Link source, Link target, String visited ) {
		this.source = source;
		this.target = target;
		this.visited = visited; 
	}
	public String getSource() {
		return source.toString();
	}
	public String getTarget() {
		return target.toString();
	}
	public Link source() {
		return source;
	}
	public Link target() {
		return target;
	}
	public String visited() {
		return visited;
	}
	public String insertString() {
		return "INSERT INTO link VALUES('"+source.getURL()+"','"+target.getURL()+"', null)";
	}
	public String updateString() {
		return "UPDATE link SET visited=current_timestamp WHERE source='"+source.getURL()+"' AND target='"+target.getURL()+"'";
	}
	public String toString() {
		return "<"+source.getURL()+", "+target.getURL()+", "+visited+">";
	}
}