| /* |
| * Copyright 2020 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.desugar.io; |
| |
| import static com.google.common.collect.ImmutableSet.toImmutableSet; |
| |
| import com.google.common.collect.ImmutableSet; |
| import com.google.devtools.build.android.desugar.langmodel.ClassName; |
| import com.google.devtools.build.android.desugar.langmodel.DependencyGraph; |
| import java.util.function.Predicate; |
| |
| /** |
| * Static utilities for finding referenced type symbols recursively according to the given filter. |
| * |
| * <p>For example, if Class A references Class B which references Class C, the reachable types from |
| * A is {A, B, C}. |
| */ |
| public final class FileBasedTypeReferenceClosure { |
| |
| private final Predicate<ClassName> typeFilter; |
| private final ClassFileBatchProvider classFileBatchProvider; |
| |
| public FileBasedTypeReferenceClosure( |
| Predicate<ClassName> typeFilter, ClassFileBatchProvider classFileBatchProvider) { |
| this.typeFilter = typeFilter; |
| this.classFileBatchProvider = classFileBatchProvider; |
| } |
| |
| public ImmutableSet<ClassName> findReachableReferencedTypes( |
| ImmutableSet<ClassName> initialTypes) { |
| return DependencyGraph.findAllReachableNodes( |
| initialTypes.stream() |
| .map( |
| className -> |
| FileBasedTypeReferenceNode.create( |
| className, typeFilter, classFileBatchProvider)) |
| .collect(toImmutableSet())) |
| .stream() |
| .map(FileBasedTypeReferenceNode::className) |
| .collect(toImmutableSet()); |
| } |
| } |