| // Copyright 2015 The Bazel Authors. All rights reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package com.google.devtools.build.singlejar; |
| |
| import static java.nio.charset.StandardCharsets.ISO_8859_1; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.zip.CRC32; |
| import java.util.zip.ZipEntry; |
| import java.util.zip.ZipOutputStream; |
| |
| /** |
| * A helper class to create zip files for testing. |
| */ |
| public class ZipFactory { |
| |
| static class Entry { |
| private final String name; |
| private final byte[] content; |
| private final boolean compressed; |
| private Entry(String name, byte[] content, boolean compressed) { |
| this.name = name; |
| this.content = content; |
| this.compressed = compressed; |
| } |
| } |
| |
| private final List<Entry> entries = new ArrayList<>(); |
| |
| // Assumes that content was created locally. Does not perform a defensive copy! |
| private void addEntry(String name, byte[] content, boolean compressed) { |
| entries.add(new Entry(name, content, compressed)); |
| } |
| |
| public ZipFactory addFile(String name, String content) { |
| addEntry(name, content.getBytes(ISO_8859_1), true); |
| return this; |
| } |
| |
| public ZipFactory addFile(String name, byte[] content) { |
| addEntry(name, content.clone(), true); |
| return this; |
| } |
| |
| public ZipFactory addFile(String name, String content, boolean compressed) { |
| addEntry(name, content.getBytes(ISO_8859_1), compressed); |
| return this; |
| } |
| |
| public ZipFactory addFile(String name, byte[] content, boolean compressed) { |
| addEntry(name, content.clone(), compressed); |
| return this; |
| } |
| |
| public byte[] toByteArray() { |
| try { |
| ByteArrayOutputStream out = new ByteArrayOutputStream(); |
| ZipOutputStream zipper = new ZipOutputStream(out); |
| for (Entry entry : entries) { |
| ZipEntry zipEntry = new ZipEntry(entry.name); |
| if (entry.compressed) { |
| zipEntry.setMethod(ZipEntry.DEFLATED); |
| } else { |
| zipEntry.setMethod(ZipEntry.STORED); |
| zipEntry.setSize(entry.content.length); |
| zipEntry.setCrc(calculateCrc32(entry.content)); |
| } |
| zipEntry.setTime(ZipCombiner.DOS_EPOCH.getTime()); |
| zipper.putNextEntry(zipEntry); |
| zipper.write(entry.content); |
| zipper.closeEntry(); |
| } |
| zipper.close(); |
| return out.toByteArray(); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| public InputStream toInputStream() { |
| return new ByteArrayInputStream(toByteArray()); |
| } |
| |
| public static long calculateCrc32(byte[] content) { |
| CRC32 crc = new CRC32(); |
| crc.update(content); |
| return crc.getValue(); |
| } |
| } |