106 lines
3.6 KiB
Java
106 lines
3.6 KiB
Java
/*
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* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.io.IOException;
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import java.io.OutputStream;
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import java.nio.file.Files;
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import java.nio.file.Paths;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.jar.Attributes;
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import java.util.jar.JarEntry;
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import java.util.jar.JarOutputStream;
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import java.util.jar.Manifest;
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public class JarBuilder {
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final private String name;
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final private Attributes attributes = new Attributes();
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final private List<Entry> entries = new ArrayList<>();
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public JarBuilder(String name) {
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this.name = name;
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attributes.putValue("Manifest-Version", "1.0");
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attributes.putValue("Created-By", "1.9.0-internal (Oracle Corporation)");
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}
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public JarBuilder addAttribute(String name, String value) {
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attributes.putValue(name, value);
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return this;
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}
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public JarBuilder addEntry(String name, byte[] bytes) {
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entries.add(new Entry(name, bytes));
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return this;
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}
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public void build() throws IOException {
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try (OutputStream os = Files.newOutputStream(Paths.get(name));
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JarOutputStream jos = new JarOutputStream(os)) {
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JarEntry me = new JarEntry("META-INF/MANIFEST.MF");
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jos.putNextEntry(me);
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Manifest manifest = new Manifest();
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manifest.getMainAttributes().putAll(attributes);
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manifest.write(jos);
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jos.closeEntry();
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entries.forEach(e -> {
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JarEntry je = new JarEntry(e.name);
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try {
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jos.putNextEntry(je);
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jos.write(e.bytes);
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jos.closeEntry();
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} catch (IOException iox) {
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throw new RuntimeException(iox);
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}
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});
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} catch (RuntimeException x) {
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Throwable t = x.getCause();
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if (t instanceof IOException) {
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IOException iox = (IOException)t;
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throw iox;
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}
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throw x;
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}
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}
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private static class Entry {
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String name;
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byte[] bytes;
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Entry(String name, byte[] bytes) {
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this.name = name;
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this.bytes = bytes;
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}
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}
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public static void main(String[] args) throws IOException {
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JarBuilder jb = new JarBuilder("version.jar");
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jb.addAttribute("Multi-Release", "true");
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String s = "something to say";
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byte[] bytes = s.getBytes();
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jb.addEntry("version/Version.class", bytes);
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jb.addEntry("README", bytes);
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jb.addEntry("version/Version.java", bytes);
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jb.build();
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}
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}
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