| // Copyright 2017 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.resources; |
| |
| import static java.nio.charset.StandardCharsets.UTF_8; |
| |
| import com.android.SdkConstants; |
| import com.android.resources.ResourceType; |
| import com.google.common.collect.Iterables; |
| import java.io.BufferedWriter; |
| import java.io.IOException; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.util.Map; |
| import java.util.Map.Entry; |
| |
| /** Writes out an R.java source. */ |
| public class RSourceGenerator { |
| |
| public static RSourceGenerator with( |
| Path outputBasePath, FieldInitializers initializers, boolean finalFields) { |
| return new RSourceGenerator(outputBasePath, initializers, finalFields); |
| } |
| |
| private final Path outputBasePath; |
| private final FieldInitializers values; |
| private final boolean finalFields; |
| |
| private RSourceGenerator( |
| Path outputBasePath, FieldInitializers initializers, boolean finalFields) { |
| this.outputBasePath = outputBasePath; |
| this.values = initializers; |
| this.finalFields = finalFields; |
| } |
| |
| /** Writes the java source with the writer values to the specified package and derived dir. */ |
| public void write(String packageName) throws IOException { |
| writeSource(packageName, values); |
| } |
| |
| /** |
| * Writes the java source with the passed subset of the writer values. |
| * |
| * @param packageName The package and the dir to write the R java source to under the output path. |
| * @param symbolsToWrite A map of ResourceType to resource name that will be written. If the map |
| * specifies a resource that does not exist in the writer values, it will be ignored. |
| */ |
| public void write(String packageName, FieldInitializers symbolsToWrite) throws IOException { |
| writeSource(packageName, values.filter(symbolsToWrite)); |
| } |
| |
| private void writeSource( |
| String packageName, |
| Iterable<Entry<ResourceType, Map<String, FieldInitializer>>> initializersToWrite) |
| throws IOException { |
| String packageDir = packageName.replace('.', '/'); |
| Path packagePath = outputBasePath.resolve(packageDir); |
| Path rJavaPath = packagePath.resolve(SdkConstants.FN_RESOURCE_CLASS); |
| Files.createDirectories(rJavaPath.getParent()); |
| |
| if (Iterables.isEmpty(initializersToWrite)) { |
| return; |
| } |
| |
| try (BufferedWriter writer = Files.newBufferedWriter(rJavaPath, UTF_8)) { |
| writer.write("/* AUTO-GENERATED FILE. DO NOT MODIFY.\n"); |
| writer.write(" *\n"); |
| writer.write(" * This class was automatically generated by the\n"); |
| writer.write(" * bazel tool from the resource data it found. It\n"); |
| writer.write(" * should not be modified by hand.\n"); |
| writer.write(" */\n"); |
| writer.write(String.format("package %s;\n", packageName)); |
| writer.write("public final class R {\n"); |
| for (Entry<ResourceType, Map<String, FieldInitializer>> entry : initializersToWrite) { |
| writer.write( |
| String.format(" public static final class %s {\n", entry.getKey().getName())); |
| for (Entry<String, FieldInitializer> fieldEntry : entry.getValue().entrySet()) { |
| fieldEntry.getValue().writeInitSource(fieldEntry.getKey(), writer, finalFields); |
| } |
| writer.write(" }\n"); |
| } |
| writer.write("}"); |
| } |
| } |
| } |