| // 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.android.SdkConstants; |
| import com.google.common.base.MoreObjects; |
| import com.google.common.base.Objects; |
| import com.google.common.collect.ImmutableSet; |
| import com.google.devtools.build.android.proto.SerializeFormat.ProtoSource; |
| import java.io.BufferedInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.nio.file.FileSystem; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.nio.file.attribute.BasicFileAttributeView; |
| |
| /** Represents where the DataValue was derived from. */ |
| public class DataSource implements Comparable<DataSource> { |
| |
| public static DataSource from(ProtoSource protoSource, FileSystem currentFileSystem) { |
| Path path = currentFileSystem.getPath(protoSource.getFilename()); |
| return of(path); |
| } |
| |
| public static DataSource of(Path sourcePath) { |
| return new DataSource(sourcePath, ImmutableSet.<DataSource>of()); |
| } |
| |
| private final Path path; |
| private final ImmutableSet<DataSource> overrides; |
| |
| private DataSource(Path path, ImmutableSet<DataSource> overrides) { |
| this.path = path; |
| this.overrides = overrides; |
| } |
| |
| public Path getPath() { |
| return path; |
| } |
| |
| public long getFileSize() throws IOException { |
| return Files.getFileAttributeView(path, BasicFileAttributeView.class).readAttributes().size(); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| if (o == null || getClass() != o.getClass()) { |
| return false; |
| } |
| return Objects.equal(path, ((DataSource) o).path) |
| && Objects.equal(overrides, ((DataSource) o).overrides); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hashCode(path, overrides); |
| } |
| |
| @Override |
| public int compareTo(DataSource o) { |
| return path.compareTo(o.path); |
| } |
| |
| public InputStream newBufferedInputStream() throws IOException { |
| return new BufferedInputStream(Files.newInputStream(path)); |
| } |
| |
| /** Selects which DataSource should be considered the authoritative source of a value. */ |
| // TODO(corysmith): Combine the sources so that we know both of the originating libraries. |
| // For now, prefer sources that have explicit definitions (values/ and not layout/), since the |
| // values are ultimately written out to a merged values.xml. Sources from layout/menu, etc. |
| // can come from "@+id" definitions. |
| public DataSource combine(DataSource otherSource) { |
| boolean thisInValuesFolder = isInValuesFolder(); |
| boolean otherInValuesFolder = otherSource.isInValuesFolder(); |
| if (thisInValuesFolder && !otherInValuesFolder) { |
| return this; |
| } |
| if (!thisInValuesFolder && otherInValuesFolder) { |
| return otherSource; |
| } |
| return this; |
| } |
| |
| public DataSource overwrite(DataSource... sources) { |
| ImmutableSet.Builder<DataSource> overridesBuilder = |
| ImmutableSet.<DataSource>builder().addAll(this.overrides); |
| for (DataSource dataSource : sources) { |
| // A DataSource cannot overwrite itself. |
| // This will be an error once the depot can be assured not have source files. |
| if (!dataSource.path.equals(path)) { |
| // Flatten the DataSource to a placeholder to avoid building trees, which end up being |
| // expensive, slow, and hard to reason about. |
| overridesBuilder.add(of(dataSource.path)); |
| } |
| overridesBuilder.addAll(dataSource.overrides); |
| } |
| return new DataSource(path, overridesBuilder.build()); |
| } |
| |
| public ImmutableSet<DataSource> overrides() { |
| return overrides; |
| } |
| |
| public boolean isInValuesFolder() { |
| return path.getParent().getFileName().toString().startsWith(SdkConstants.FD_RES_VALUES); |
| } |
| |
| public boolean hasOveridden(DataSource source) { |
| return overrides.contains(source); |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper(getClass()) |
| .add("path", path) |
| .add("overrides", overrides) |
| .toString(); |
| } |
| |
| /** Returns a representation suitible for a conflict message. */ |
| public String asConflictString() { |
| return path.toString(); |
| } |
| } |