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.blob;
018
019import java.io.IOException;
020import java.io.InputStream;
021import javax.jms.JMSException;
022import org.apache.activemq.command.ActiveMQBlobMessage;
023
024
025/**
026 * Mediator for Blob Download
027 */
028public class BlobDownloader {
029
030    private final BlobTransferPolicy blobTransferPolicy;
031    
032    public BlobDownloader(BlobTransferPolicy transferPolicy) {
033        // need to do a defensive copy
034        this.blobTransferPolicy = transferPolicy.copy();
035    }
036    
037    public InputStream getInputStream(ActiveMQBlobMessage message) throws IOException, JMSException {
038        return getStrategy().getInputStream(message);
039    }
040    
041    public void deleteFile(ActiveMQBlobMessage message) throws IOException, JMSException {
042        getStrategy().deleteFile(message);
043    }
044    
045    public BlobTransferPolicy getBlobTransferPolicy() {
046        return blobTransferPolicy;
047    }
048    
049    public BlobDownloadStrategy getStrategy() {
050        return getBlobTransferPolicy().getDownloadStrategy();
051    }
052}