001    /*
002     * Copyright (c) 2011, Cloudera, Inc. All Rights Reserved.
003     *
004     * Cloudera, Inc. licenses this file to you under the Apache License,
005     * Version 2.0 (the "License"). You may not use this file except in
006     * compliance with the License. You may obtain a copy of the License at
007     *
008     *     http://www.apache.org/licenses/LICENSE-2.0
009     *
010     * This software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
011     * CONDITIONS OF ANY KIND, either express or implied. See the License for
012     * the specific language governing permissions and limitations under the
013     * License.
014     */
015    package com.cloudera.lib.wsrs;
016    
017    import com.cloudera.lib.io.IOUtils;
018    
019    import javax.ws.rs.core.StreamingOutput;
020    import java.io.IOException;
021    import java.io.InputStream;
022    import java.io.OutputStream;
023    
024    public class InputStreamEntity implements StreamingOutput {
025      private InputStream is;
026      private long offset;
027      private long len;
028    
029      public InputStreamEntity(InputStream is, long offset, long len) {
030        this.is = is;
031        this.offset = offset;
032        this.len = len;
033      }
034    
035      public InputStreamEntity(InputStream is) {
036        this(is, 0, -1);
037      }
038    
039      @Override
040      public void write(OutputStream os) throws IOException {
041        IOUtils.copy(is, os, offset, len);
042      }
043    }