alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

What this is

This file is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Other links

The source code

// $Header: /home/cvs/jakarta-jmeter/src/protocol/http/org/apache/jmeter/protocol/http/parser/URLCollection.java,v 1.4 2004/03/30 18:08:09 sebb Exp $
/*
 * Copyright 2004 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
*/

package org.apache.jmeter.protocol.http.parser;

import java.net.MalformedURLException;
import java.net.URL;
import java.util.Collection;
import java.util.Iterator;

/**
 * Collection class designed for handling URLs
 * 
 * Before a URL is added to the collection, it is wrapped in a URLString class.
 * The iterator unwraps the URL before return.
 * 
 * N.B.
 * Designed for use by HTMLParser, so is not a full implementation 
 * - e.g. does not support remove()
 * 
 * @version $Revision: 1.4 $ $Date: 2004/03/30 18:08:09 $
 */
public class URLCollection
{
	Collection coll;

    // Inaccessible default constructor
    private URLCollection(){}
    
    /**
     * Creates a new URLCollection from an existing Collection
     * 
     */
    public URLCollection(Collection c)
    {
        coll = c;
    }

    /**
     * Adds the URL to the Collection, first wrapping
     * it in the URLString class
     * 
     * @param u URL to add
     * @return boolean condition returned by the add() method of the underlying collection
     */
    public boolean add(URL u)
    {
    	return coll.add(new URLString(u));
    }
    
	/*
	 * Adds the string to the Collection, first wrapping
	 * it in the URLString class
	 * 
	 * @param s string to add
	 * @return boolean condition returned by the add() method of the underlying collection
	 */
	private boolean add(String s)
	{
		return coll.add(new URLString(s));
	}
    
    /**
     * Convenience method for adding URLs to the collection
     * If the url parameter is null or empty, nothing is done
     * 
     * @param url String, may be null or empty
     * @param baseUrl
     * @return boolean condition returned by the add() method of the underlying collection
     */
    public boolean addURL(String url, URL baseUrl)
	{
		if (url == null || url.length() == 0) return false;
		boolean b=false;
		try
		{
			b=this.add(new URL(baseUrl, url));
		}
		catch(MalformedURLException mfue)
		{
			//TODO log a warning message?
			b=this.add(url);// Add the string if cannot create the URL
		}
		return b;
	}
    
    
	public Iterator iterator()
	{
		return new UrlIterator(coll.iterator());
	}

    /*
     * Private iterator used to unwrap the URL from the URLString class
     * 
     */
	private static class UrlIterator implements Iterator
	{
		Iterator iter;
		
		UrlIterator(Iterator i)
		{
			iter=i;
		}
	
		public boolean hasNext()
		{
			return iter.hasNext();
		}
	
		/*
		 * Unwraps the URLString class to return the URL 
		 */
		public Object next()
		{
			return ((URLString) iter.next()).getURL();
		}
	
		public void remove()
		{
			throw new UnsupportedOperationException();
		}
	}
}
... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.