001/**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.activemq.console.command.store.amq;
018
019import java.io.ByteArrayInputStream;
020import java.io.InputStream;
021import java.util.HashMap;
022
023import org.apache.commons.collections.ExtendedProperties;
024import org.apache.velocity.exception.ResourceNotFoundException;
025import org.apache.velocity.runtime.RuntimeServices;
026import org.apache.velocity.runtime.resource.Resource;
027import org.apache.velocity.runtime.resource.loader.FileResourceLoader;
028import org.apache.velocity.runtime.resource.loader.ResourceLoader;
029
030public class CustomResourceLoader extends ResourceLoader {
031        
032        private final static ThreadLocal<HashMap<String, String>> resourcesTL = new ThreadLocal<HashMap<String, String>>();
033        private final FileResourceLoader fileResourceLoader = new FileResourceLoader();
034        
035        @Override
036        public void commonInit(RuntimeServices rs, ExtendedProperties configuration) {
037                super.commonInit(rs, configuration);
038                fileResourceLoader.commonInit(rs, configuration);
039        }
040        
041    public void init( ExtendedProperties configuration)
042    {
043        fileResourceLoader.init(configuration);
044    }
045    
046    /**
047     */
048    public synchronized InputStream getResourceStream( String name )
049        throws ResourceNotFoundException
050    {
051        InputStream result = null;
052        
053        if (name == null || name.length() == 0)
054        {
055            throw new ResourceNotFoundException ("No template name provided");
056        }
057        
058        String value = null;
059        HashMap<String, String> resources = resourcesTL.get();
060        if( resources!=null ) {
061                value = resources.get(name);
062        }
063        
064        if( value == null ) {
065                result = this.fileResourceLoader.getResourceStream(name);
066        } else {
067            try 
068            {
069                result = new ByteArrayInputStream(value.getBytes());
070            }
071            catch( Exception e )
072            {
073                throw new ResourceNotFoundException( e.getMessage() );
074            }
075        }
076        return result;
077    }
078    
079    public boolean isSourceModified(Resource resource)
080    {
081        return false;
082    }
083
084    public long getLastModified(Resource resource)
085    {
086        return 0;
087    }
088
089        static public HashMap<String, String> getResources() {
090                return resourcesTL.get();
091        }
092
093        static public void setResources(HashMap<String, String> arg0) {
094                resourcesTL.set(arg0);
095        }
096
097}