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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 com.google.common.base.MoreObjects;
import com.google.common.base.Preconditions;
import com.google.devtools.build.android.proto.SerializeFormat;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.file.FileSystem;
import java.nio.file.Path;
import java.util.Objects;
/**
* Represents a DataKey for assets.
*
* <p>Assets are added to a single directory inside an apk by aapt. Therefore, to determine
* overwritten and conflicting assets we take the relative from the asset directory and turn it into
* a DataKey. This serves as the unique identifier for each apk stored asset.
*
* <p>Note: Assets have no qualifiers or packages.
*/
public class RelativeAssetPath implements DataKey {
/** A Factory that creates RelativeAssetsPath objects whose paths are relative to a given path. */
public static class Factory {
private final Path assetRoot;
private Factory(Path assetRoot) {
this.assetRoot = assetRoot;
}
/** Creates a new factory with the asset directory that contains assets. */
public static Factory of(Path assetRoot) {
return new Factory(Preconditions.checkNotNull(assetRoot));
}
public RelativeAssetPath create(Path assetPath) {
if (!assetPath.startsWith(assetRoot)) {
throw new IllegalArgumentException(
String.format("Asset path %s should reside under asset root %s", assetPath, assetRoot));
}
return RelativeAssetPath.of(assetRoot.relativize(assetPath));
}
}
/** Reconstitutes the relative asset path from a protocol buffer and {@link FileSystem}. */
static RelativeAssetPath fromProto(SerializeFormat.DataKey serialized, FileSystem fileSystem) {
return of(fileSystem.getPath(serialized.getKeyValue()));
}
private final Path relativeAssetPath;
private RelativeAssetPath(Path relativeAssetPath) {
this.relativeAssetPath = relativeAssetPath;
}
public static RelativeAssetPath of(Path relativeAssetPath) {
return new RelativeAssetPath(relativeAssetPath);
}
@Override
public boolean equals(Object other) {
if (this == other) {
return true;
}
if (other == null || getClass() != other.getClass()) {
return false;
}
RelativeAssetPath that = (RelativeAssetPath) other;
return Objects.equals(relativeAssetPath, that.relativeAssetPath);
}
public String toPathString() {
return this.relativeAssetPath.toString();
}
@Override
public int hashCode() {
return relativeAssetPath.hashCode();
}
@Override
public String toString() {
return MoreObjects.toStringHelper(this).add("relativeAssetPath", relativeAssetPath).toString();
}
@Override
public int compareTo(DataKey otherKey) {
if (!(otherKey instanceof RelativeAssetPath)) {
return getKeyType().compareTo(otherKey.getKeyType());
}
RelativeAssetPath otherAssetPath = (RelativeAssetPath) otherKey;
return this.relativeAssetPath.compareTo(otherAssetPath.relativeAssetPath);
}
@Override
public KeyType getKeyType() {
return KeyType.ASSET_PATH;
}
@Override
public void serializeTo(OutputStream output, int valueSize) throws IOException {
SerializeFormat.DataKey.newBuilder()
.setKeyValue(relativeAssetPath.toString())
.setValueSize(valueSize)
.build()
.writeDelimitedTo(output);
}
@Override
public String toPrettyString() {
return "asset:" + relativeAssetPath;
}
}
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