001/** 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018 019package org.apache.hadoop.lib.wsrs; 020 021import org.apache.hadoop.classification.InterfaceAudience; 022import org.apache.hadoop.io.IOUtils; 023 024import javax.ws.rs.core.StreamingOutput; 025import java.io.IOException; 026import java.io.InputStream; 027import java.io.OutputStream; 028 029@InterfaceAudience.Private 030public class InputStreamEntity implements StreamingOutput { 031 private InputStream is; 032 private long offset; 033 private long len; 034 035 public InputStreamEntity(InputStream is, long offset, long len) { 036 this.is = is; 037 this.offset = offset; 038 this.len = len; 039 } 040 041 public InputStreamEntity(InputStream is) { 042 this(is, 0, -1); 043 } 044 045 @Override 046 public void write(OutputStream os) throws IOException { 047 IOUtils.skipFully(is, offset); 048 if (len == -1) { 049 IOUtils.copyBytes(is, os, 4096, true); 050 } else { 051 IOUtils.copyBytes(is, os, len, true); 052 } 053 } 054}