com.google.devtools.build.android.dexer.DexFileArchive.java Source code

Introduction

Here is the source code for com.google.devtools.build.android.dexer.DexFileArchive.java

Source

// Copyright 2016 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.android.dexer;

import com.google.common.io.ByteStreams;

import com.android.dex.Dex;
import com.android.dx.dex.file.DexFile;

import java.io.Closeable;
import java.io.IOException;
import java.io.InputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

/**
 * Wrapper around a {@link ZipOutputStream} to simplify writing archives with {@code .dex} files.
 * Adding files generally requires a {@link ZipEntry} in order to control timestamps.
 */
class DexFileArchive implements Closeable {

    private final ZipOutputStream out;

    public DexFileArchive(ZipOutputStream out) {
        this.out = out;
    }

    /**
     * Copies the content of the given {@link InputStream} into an entry with the given details.
     */
    public DexFileArchive copy(ZipEntry entry, InputStream in) throws IOException {
        out.putNextEntry(entry);
        ByteStreams.copy(in, out);
        out.closeEntry();
        return this;
    }

    /**
     * Serializes and adds a {@code .dex} file with the given details.
     */
    public DexFileArchive addFile(ZipEntry entry, DexFile dex) throws IOException {
        return addFile(entry, DexFiles.encode(dex));
    }

    /**
     * Adds a {@code .dex} file with the given details.
     */
    public DexFileArchive addFile(ZipEntry entry, Dex dex) throws IOException {
        entry.setSize(dex.getLength());
        out.putNextEntry(entry);
        dex.writeTo(out);
        out.closeEntry();
        return this;
    }

    @Override
    public void close() throws IOException {
        out.close();
    }

    private DexFileArchive addFile(ZipEntry entry, byte[] content) throws IOException {
        entry.setSize(content.length);
        out.putNextEntry(entry);
        out.write(content);
        out.closeEntry();
        return this;
    }
}