001// Copyright 2006, 2007, 2008, 2009, 2011, 2012 The Apache Software Foundation
002//
003// Licensed under the Apache License, Version 2.0 (the "License");
004// you may not use this file except in compliance with the License.
005// You may obtain a copy of the License at
006//
007// http://www.apache.org/licenses/LICENSE-2.0
008//
009// Unless required by applicable law or agreed to in writing, software
010// distributed under the License is distributed on an "AS IS" BASIS,
011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012// See the License for the specific language governing permissions and
013// limitations under the License.
014
015package org.apache.tapestry5.internal.services;
016
017import org.apache.tapestry5.commons.Resource;
018import org.apache.tapestry5.commons.services.InvalidationListener;
019
020import java.util.Map;
021
022public class ResourceDigestManagerImpl implements ResourceDigestManager
023{
024    public String getDigest(Resource resource)
025    {
026        return null;
027    }
028
029    public boolean requiresDigest(Resource resource)
030    {
031        return false;
032    }
033
034    public void addInvalidationListener(InvalidationListener listener)
035    {
036    }
037
038    public void addInvalidationCallback(Runnable callback)
039    {
040    }
041
042    public void clearOnInvalidation(Map<?, ?> map)
043    {
044    }
045}