Java tutorial
/* * Copyright 2017 the original author or authors. * * 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 org.gradle.api.internal.tasks.properties; import com.google.common.collect.ImmutableSortedSet; import com.google.common.collect.Iterators; import com.google.common.collect.Lists; import org.gradle.api.NonNullApi; import org.gradle.api.internal.tasks.CacheableTaskOutputFilePropertySpec; import org.gradle.api.internal.tasks.CompositeTaskOutputPropertySpec; import org.gradle.api.internal.tasks.TaskOutputFilePropertySpec; import org.gradle.api.internal.tasks.TaskPropertyUtils; import java.io.File; import java.util.List; @NonNullApi public class GetOutputFilesVisitor extends PropertyVisitor.Adapter { private final List<TaskOutputFilePropertySpec> specs = Lists.newArrayList(); private ImmutableSortedSet<TaskOutputFilePropertySpec> fileProperties; private boolean hasDeclaredOutputs; @Override public void visitOutputFileProperty(TaskOutputFilePropertySpec outputFileProperty) { hasDeclaredOutputs = true; if (outputFileProperty instanceof CompositeTaskOutputPropertySpec) { Iterators.addAll(specs, ((CompositeTaskOutputPropertySpec) outputFileProperty).resolveToOutputProperties()); } else { if (outputFileProperty instanceof CacheableTaskOutputFilePropertySpec) { File outputFile = ((CacheableTaskOutputFilePropertySpec) outputFileProperty).getOutputFile(); if (outputFile == null) { return; } } specs.add(outputFileProperty); } } public ImmutableSortedSet<TaskOutputFilePropertySpec> getFileProperties() { if (fileProperties == null) { fileProperties = TaskPropertyUtils.collectFileProperties("output", specs.iterator()); } return fileProperties; } public boolean hasDeclaredOutputs() { return hasDeclaredOutputs; } }