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Posted to cvs@cocoon.apache.org by up...@apache.org on 2003/10/06 16:38:39 UTC
cvs commit: cocoon-2.1/src/java/org/apache/cocoon/bean/helpers Crawler.java
upayavira 2003/10/06 07:38:39
Added: src/java/org/apache/cocoon/bean/helpers Crawler.java
Log:
Missed out Crawer.java from previous commit
Revision Changes Path
1.1 cocoon-2.1/src/java/org/apache/cocoon/bean/helpers/Crawler.java
Index: Crawler.java
===================================================================
/*
============================================================================
The Apache Software License, Version 1.1
============================================================================
Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
Redistribution and use in source and binary forms, with or without modifica-
tion, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
3. The end-user documentation included with the redistribution, if any, must
include the following acknowledgment: "This product includes software
developed by the Apache Software Foundation (http://www.apache.org/)."
Alternately, this acknowledgment may appear in the software itself, if
and wherever such third-party acknowledgments normally appear.
4. The names "Apache Cocoon" and "Apache Software Foundation" must not be
used to endorse or promote products derived from this software without
prior written permission. For written permission, please contact
apache@apache.org.
5. Products derived from this software may not be called "Apache", nor may
"Apache" appear in their name, without prior written permission of the
Apache Software Foundation.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
This software consists of voluntary contributions made by many individuals
on behalf of the Apache Software Foundation and was originally created by
Stefano Mazzocchi <st...@apache.org>. For more information on the Apache
Software Foundation, please see <http://www.apache.org/>.
*/
package org.apache.cocoon.bean.helpers;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.apache.cocoon.bean.Target;
import org.apache.cocoon.ProcessingException;
/**
* A simple Cocoon crawler
*
* @author <a href="mailto:uv@upaya.co.uk">Upayavira</a>
* @version CVS $Id: Crawler.java,v 1.1 2003/10/06 14:38:39 upayavira Exp $
*/
public class Crawler {
private Map allTranslatedLinks;
private Map stillNotVisited;
private Set visitedAlready;
public Crawler() {
visitedAlready = new HashSet();
stillNotVisited = new HashMap();
allTranslatedLinks = new HashMap();
}
/**
* Add a target for future processing
*/
public boolean addTarget(Target target) {
String targetString = target.toString();
if (!visitedAlready.contains(targetString)) {
if (!stillNotVisited.containsKey(targetString)) {
stillNotVisited.put(targetString, target);
return true;
}
}
return false;
}
/**
* Returns the number of targets for processing
*/
public int getRemainingCount() {
return stillNotVisited.size();
}
public int getProcessedCount() {
return visitedAlready.size();
}
public int getTranslatedCount() {
return allTranslatedLinks.size();
}
public void addTranslatedLink(Target target) throws ProcessingException {
allTranslatedLinks.put(target.getSourceURI(), target.getDestinationURI());
}
public boolean hasTranslatedLink(Target link) {
return allTranslatedLinks.get(link.getSourceURI())!=null;
}
/**
* Returns an iterator for reading targets
*/
public CrawlingIterator iterator() {
return new CrawlingIterator(visitedAlready, stillNotVisited);
}
public class CrawlingIterator implements Iterator {
private Map stillNotVisited;
private Set visitedAlready;
public CrawlingIterator(Set visitedAlready, Map stillNotVisited) {
this.visitedAlready = visitedAlready;
this.stillNotVisited = stillNotVisited;
}
/**
* Check if list of not visited URIs is empty
*
* @return boolean true iff list of not visited URIs is not empty
*/
public boolean hasNext() {
return !stillNotVisited.isEmpty();
}
/**
* Removing objects is not supported, and will always throw
* a <code>UnsupportedOperationException</code>.
*/
public void remove(){
throw new UnsupportedOperationException();
}
/**
* Get next not visited URIs
*
* @return object from list of not visited URIs, move it immediatly
* to set of visited URIs
*/
public Object next() {
// could this be simpler:
Object nextKey = stillNotVisited.keySet().toArray()[0];
Object nextElement = stillNotVisited.remove(nextKey);
visitedAlready.add(nextKey);
return nextElement;
}
}
}