1 /******************************************************************************* 2 * Copyright (c) 2009, 2018 Mountainminds GmbH & Co. KG and Contributors 3 * All rights reserved. This program and the accompanying materials 4 * are made available under the terms of the Eclipse Public License v1.0 5 * which accompanies this distribution, and is available at 6 * http://www.eclipse.org/legal/epl-v10.html 7 * 8 * Contributors: 9 * Marc R. Hoffmann - initial API and implementation 10 * 11 *******************************************************************************/ 12 package org.jacoco.core.internal; 13 14 import java.io.ByteArrayInputStream; 15 import java.io.ByteArrayOutputStream; 16 import java.io.FilterInputStream; 17 import java.io.IOException; 18 import java.io.InputStream; 19 import java.io.OutputStream; 20 import java.util.jar.JarInputStream; 21 import java.util.jar.JarOutputStream; 22 import java.util.jar.Pack200; 23 24 /** 25 * Internal wrapper for the weird Pack200 Java API to allow usage with streams. 26 */ 27 public final class Pack200Streams { 28 29 /** 30 * Unpack a stream in Pack200 format into a stream in JAR/ZIP format. 31 * 32 * @param input 33 * stream in Pack200 format 34 * @return stream in JAR/ZIP format 35 * @throws IOException 36 * in case of errors with the streams 37 */ 38 public static InputStream unpack(final InputStream input) 39 throws IOException { 40 final ByteArrayOutputStream buffer = new ByteArrayOutputStream(); 41 final JarOutputStream jar = new JarOutputStream(buffer); 42 Pack200.newUnpacker().unpack(new NoCloseInput(input), jar); 43 jar.finish(); 44 return new ByteArrayInputStream(buffer.toByteArray()); 45 } 46 47 /** 48 * Packs a buffer in JAR/ZIP format into a stream in Pack200 format. 49 * 50 * @param source 51 * source in JAR/ZIP format 52 * @param output 53 * stream in Pack200 format 54 * @throws IOException 55 * in case of errors with the streams 56 */ 57 public static void pack(final byte[] source, final OutputStream output) 58 throws IOException { 59 final JarInputStream jar = new JarInputStream(new ByteArrayInputStream( 60 source)); 61 Pack200.newPacker().pack(jar, output); 62 } 63 64 private static class NoCloseInput extends FilterInputStream { 65 protected NoCloseInput(final InputStream in) { 66 super(in); 67 } 68 69 @Override 70 public void close() throws IOException { 71 // do not close the underlying stream 72 } 73 } 74 75 private Pack200Streams() { 76 } 77 78 } 79
