    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}