| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * 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.android.build.gradle.internal.tasks; |
| import com.android.ide.common.res2.FileStatus; |
| import com.android.ide.common.res2.SourceSet; |
| import com.google.common.collect.Lists; |
| import com.google.common.collect.Maps; |
| |
| import org.gradle.api.Action; |
| import org.gradle.api.tasks.Optional; |
| import org.gradle.api.tasks.OutputDirectory; |
| import org.gradle.api.tasks.TaskAction; |
| import org.gradle.api.tasks.incremental.IncrementalTaskInputs; |
| import org.gradle.api.tasks.incremental.InputFileDetails; |
| |
| import java.io.File; |
| import java.util.List; |
| import java.util.Map; |
| |
| public abstract class IncrementalTask extends BaseTask { |
| |
| private File incrementalFolder; |
| |
| public void setIncrementalFolder(File incrementalFolder) { |
| this.incrementalFolder = incrementalFolder; |
| } |
| |
| @OutputDirectory @Optional |
| public File getIncrementalFolder() { |
| return incrementalFolder; |
| } |
| |
| /** |
| * Whether this task can support incremental update. |
| * |
| * @return whether this task can support incremental update. |
| */ |
| protected boolean isIncremental() { |
| return false; |
| } |
| |
| /** |
| * Actual task action. This is called when a full run is needed, which is always the case if |
| * {@link #isIncremental()} returns false. |
| * |
| */ |
| protected abstract void doFullTaskAction(); |
| |
| /** |
| * Optional incremental task action. |
| * Only used if {@link #isIncremental()} returns true. |
| * |
| * @param changedInputs the changed input files. |
| */ |
| protected void doIncrementalTaskAction(Map<File, FileStatus> changedInputs) { |
| // do nothing. |
| } |
| |
| /** |
| * Actual entry point for the action. |
| * Calls out to the doTaskAction as needed. |
| */ |
| @TaskAction |
| void taskAction(IncrementalTaskInputs inputs) { |
| if (!isIncremental()) { |
| doFullTaskAction(); |
| return; |
| } |
| |
| if (!inputs.isIncremental()) { |
| getProject().getLogger().info("Unable do incremental execution: full task run"); |
| doFullTaskAction(); |
| return; |
| } |
| |
| final Map<File, FileStatus> changedInputs = Maps.newHashMap(); |
| inputs.outOfDate(new Action<InputFileDetails>() { |
| @Override |
| public void execute(InputFileDetails change) { |
| changedInputs.put(change.getFile(), change.isAdded() ? FileStatus.NEW : FileStatus.CHANGED); |
| } |
| }); |
| |
| inputs.removed(new Action<InputFileDetails>() { |
| @Override |
| public void execute(InputFileDetails change) { |
| |
| changedInputs.put(change.getFile(), FileStatus.REMOVED); |
| } |
| }); |
| |
| doIncrementalTaskAction(changedInputs); |
| } |
| |
| public static List<File> flattenSourceSets(List<? extends SourceSet> resourceSets) { |
| List<File> list = Lists.newArrayList(); |
| |
| for (SourceSet sourceSet : resourceSets) { |
| list.addAll(sourceSet.getSourceFiles()); |
| } |
| |
| return list; |
| } |
| } |