/**
* Copyright 2011 meltmedia
*
* 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.xchain.framework.net;
import java.net.URL;
/**
* Interface for strategies to check if a URL references something that exists. Each UrlExistsStrategy is tied to a protocol.
*
* @author Christian Trimble
* @author Devon Tackett
*/
public interface UrlExistsStrategy
{
/**
* Check if anything exists at the given URL.
*
* @param url The URL to check on.
*
* @return True if something exists at the given URL.
*/
public boolean exists( URL url )
throws Exception;
/**
* @return The protocol this UrlExistsStrategy is for.
*/
public String getProtocol();
}