/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.wicket.util.collections;
import java.io.Serializable;
import java.net.URL;
import java.util.Comparator;
/**
* A comparator of URL instances.
*
* Comparing URLs with their implementation of #equals() is
* bad because it may cause problems like DNS resolving, or other
* slow checks. This comparator uses the external form of an URL
* to make a simple comparison of two Strings.
*
* @since 1.5.6
*/
public class UrlExternalFormComparator implements Comparator<URL>, Serializable
{
private static final long serialVersionUID = 1L;
@Override
public int compare(URL url1, URL url2)
{
return url1.toExternalForm().compareTo(url2.toExternalForm());
}
}