1 /* 2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package jdk.tools.jmod; 27 28 import java.io.BufferedOutputStream; 29 import java.io.File; 30 import java.io.IOException; 31 import java.io.InputStream; 32 import java.io.OutputStream; 33 import java.io.UncheckedIOException; 34 import java.nio.file.Files; 35 import java.nio.file.Path; 36 import java.nio.file.Paths; 37 import java.util.zip.ZipEntry; 38 import java.util.zip.ZipOutputStream; 39 40 import static jdk.internal.jmod.JmodFile.*; 41 42 /** 43 * Output stream to write to JMOD file 44 */ 45 class JmodOutputStream extends OutputStream implements AutoCloseable { 46 /** 47 * This method creates (or overrides, if exists) the JMOD file, 48 * returning the the output stream to write to the JMOD file. 49 */ 50 static JmodOutputStream newOutputStream(Path file) throws IOException { 51 OutputStream out = Files.newOutputStream(file); 52 BufferedOutputStream bos = new BufferedOutputStream(out); 53 return new JmodOutputStream(bos); 54 } 55 56 private final ZipOutputStream zos; 57 private JmodOutputStream(OutputStream out) { 58 this.zos = new ZipOutputStream(out); 59 try { 60 out.write(JMOD_MAGIC_NUMBER); 61 } catch (IOException e) { 62 throw new UncheckedIOException(e); 63 } 64 } 65 66 /** 67 * Writes the input stream to the named entry of the given section. 68 */ 69 public void writeEntry(InputStream in, Section section, String name) 70 throws IOException 71 { 72 ZipEntry ze = newEntry(section, name); 73 zos.putNextEntry(ze); 74 in.transferTo(zos); 75 zos.closeEntry(); 76 } 77 78 /** 79 * Writes the given bytes to the named entry of the given section. 80 */ 81 public void writeEntry(byte[] bytes, Section section, String path) 82 throws IOException 83 { 84 ZipEntry ze = newEntry(section, path); 85 zos.putNextEntry(ze); 86 zos.write(bytes); 87 zos.closeEntry(); 88 } 89 90 /** 91 * Writes the given entry to the given input stream. 92 */ 93 public void writeEntry(InputStream in, Entry e) throws IOException { 94 zos.putNextEntry(e.zipEntry()); 95 zos.write(in.readAllBytes()); 96 zos.closeEntry(); 97 } 98 99 private ZipEntry newEntry(Section section, String path) { 100 String prefix = section.jmodDir(); 101 String name = Paths.get(prefix, path).toString() 102 .replace(File.separatorChar, '/'); 103 return new ZipEntry(name); 104 } 105 106 @Override 107 public void write(int b) throws IOException { 108 zos.write(b); 109 } 110 111 @Override 112 public void close() throws IOException { 113 zos.close(); 114 } 115 } 116