bundles/org.simantics.compressions/src/org/simantics/compressions/impl/Channels.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2011 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.compressions.impl;
  13
  14 import java.io.IOException;
  15 import java.io.InputStream;
  16 import java.nio.ByteBuffer;
  17 import java.nio.channels.ReadableByteChannel;
  18
  19 /**
  20  * @author Tuukka Lehtonen
  21  */
  22 public class Channels {
  23
  24     public static int read(ReadableByteChannel channel, ByteBuffer intoBuffer, int expectedBytes) throws IOException {
  25         int read = 0;
  26         while (read < expectedBytes) {
  27             int ret = channel.read(intoBuffer);
  28             if (ret < 0)
  29                 return read; // End-Of-Stream
  30             read += ret;
  31         }
  32         return read;
  33     }
  34
  35     public static int read(ReadableByteChannel channel, ByteBuffer intoBuffer) throws IOException {
  36         return read(channel, intoBuffer, intoBuffer.limit());
  37     }
  38
  39     public static int readStream(InputStream stream, byte[] array, int expectedBytes) throws IOException {
  40         int read = 0;
  41         while (read < expectedBytes) {
  42             int ret = stream.read(array, read, expectedBytes - read);
  43             if (ret < 0)
  44                 return read; // End-Of-Stream
  45             read += ret;
  46         }
  47         return read;
  48     }
  49
  50 }