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     */
017    package org.apache.activemq.blob;
018    
019    import java.io.IOException;
020    import java.io.InputStream;
021    import java.net.URL;
022    import javax.jms.JMSException;
023    import org.apache.activemq.command.ActiveMQBlobMessage;
024    
025    /**
026     * A default implementation of {@link BlobDownloadStrategy} which uses the URL
027     * class to download files or streams from a remote URL
028     */
029    public class DefaultBlobDownloadStrategy implements BlobDownloadStrategy{
030    
031        public InputStream getInputStream(ActiveMQBlobMessage message) throws IOException, JMSException {
032            URL value = message.getURL();
033            if (value == null) {
034                return null;
035            }
036            return value.openStream();
037        }
038    
039    }