/*
* Copyright (C) 2014 hu
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
package cn.edu.hfut.dmic.webcollector.generator;
import cn.edu.hfut.dmic.webcollector.generator.Generator;
import cn.edu.hfut.dmic.webcollector.model.CrawlDatum;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
/**
* 爬取指定集合中的url列表的爬取任务生成器
* @author hu
*/
public class CollectionGenerator implements Generator{
private ArrayList<CrawlDatum> data=new ArrayList<CrawlDatum>();
public CollectionGenerator(){
iterator=data.iterator();
}
public CollectionGenerator(Collection<CrawlDatum> crawldatums){
for(CrawlDatum crawldatum:crawldatums){
data.add(crawldatum);
}
iterator=data.iterator();
}
public void addUrls(Collection<String> urls){
for(String url:urls){
CrawlDatum crawldatum=new CrawlDatum();
crawldatum.setUrl(url);
crawldatum.setFetchTime(CrawlDatum.FETCHTIME_UNDEFINED);
crawldatum.setStatus(CrawlDatum.STATUS_DB_UNFETCHED);
data.add(crawldatum);
}
iterator=data.iterator();
}
public void addUrl(String url){
CrawlDatum crawldatum=new CrawlDatum();
crawldatum.setUrl(url);
crawldatum.setFetchTime(CrawlDatum.FETCHTIME_UNDEFINED);
crawldatum.setStatus(CrawlDatum.STATUS_DB_UNFETCHED);
data.add(crawldatum);
iterator=data.iterator();
}
public void addCrawlDatums(Collection<CrawlDatum> crawldatums){
data.addAll(crawldatums);
iterator=data.iterator();
}
private Iterator<CrawlDatum> iterator;
@Override
public CrawlDatum next() {
if(iterator.hasNext()){
return iterator.next();
}else{
return null;
}
}
/*
public static void main(String[] args){
CollectionGenerator generator=new CollectionGenerator();
generator.addUrl("http://abc1.com");
generator.addUrl("http://abc2.com");
CrawlDatum crawldatum;
while((crawldatum=generator.next())!=null){
System.out.println(crawldatum.getUrl());
}
}
*/
}