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// 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;
import static java.nio.charset.StandardCharsets.UTF_8;
import com.google.common.collect.Ordering;
import java.io.Flushable;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.StandardOpenOption;
import java.util.HashMap;
import java.util.Map;
/**
* Writer for UnwrittenMergedAndroidData.
*/
// TODO(corysmith): Profile this class on large datasets and look for bottlenecks, as this class
// does all the IO.
public class AndroidDataWriter implements Flushable, AndroidDataWritingVisitor {
private final Path destination;
private final Map<FullyQualifiedName, Iterable<String>> valueFragments = new HashMap<>();
private Path resourceDirectory;
private Path assetDirectory;
private AndroidDataWriter(Path destination, Path resourceDirectory, Path assetsDirectory) {
this.destination = destination;
this.resourceDirectory = resourceDirectory;
this.assetDirectory = assetsDirectory;
}
public static AndroidDataWriter from(Path destination) {
return new AndroidDataWriter(
destination, destination.resolve("res"), destination.resolve("assets"));
}
@Override
public Path copyManifest(Path sourceManifest) throws IOException {
// aapt won't read any manifest that is not named AndroidManifest.xml,
// so we hard code it here.
Path destinationManifest = destination.resolve("AndroidManifest.xml");
copy(sourceManifest, destinationManifest);
return destinationManifest;
}
public Path assetDirectory() {
return assetDirectory;
}
public Path resourceDirectory() {
return resourceDirectory;
}
@Override
public void copyAsset(Path source, String relativeDestinationPath) throws IOException {
copy(source, assetDirectory.resolve(relativeDestinationPath));
}
@Override
public void copyResource(Path source, String relativeDestinationPath) throws IOException {
copy(source, resourceDirectory.resolve(relativeDestinationPath));
}
private void copy(Path sourcePath, Path destinationPath) throws IOException {
Files.createDirectories(destinationPath.getParent());
Files.copy(sourcePath, destinationPath);
}
/**
* Finalizes all operations and flushes the buffers.
*/
@Override
public void flush() throws IOException {
Path values = Files.createDirectories(resourceDirectory().resolve("values"));
try (FileChannel channel =
FileChannel.open(
values.resolve("values.xml"),
StandardOpenOption.CREATE_NEW,
StandardOpenOption.WRITE)) {
channel.write(ByteBuffer.wrap("<resources>".getBytes(UTF_8)));
for (FullyQualifiedName key : Ordering.natural().sortedCopy(valueFragments.keySet())) {
for (String line : valueFragments.get(key)) {
channel.write(ByteBuffer.wrap(line.getBytes(UTF_8)));
}
}
channel.write(ByteBuffer.wrap("</resources>".getBytes(UTF_8)));
}
valueFragments.clear();
}
@Override
public void writeToValuesXml(FullyQualifiedName key, Iterable<String> xmlFragment) {
valueFragments.put(key, xmlFragment);
}
}
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