| // 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.desugar; |
| |
| import static com.google.common.base.Preconditions.checkState; |
| |
| import com.google.common.collect.ImmutableMap; |
| import java.util.LinkedHashMap; |
| import java.util.Map; |
| import org.objectweb.asm.ClassVisitor; |
| import org.objectweb.asm.tree.ClassNode; |
| |
| /** |
| * Simple wrapper around a map that holds generated classes so they can be processed later. |
| */ |
| class GeneratedClassStore { |
| |
| /** Map from internal names to generated classes with deterministic iteration order. */ |
| private final Map<String, ClassNode> classes = new LinkedHashMap<>(); |
| |
| /** |
| * Adds a class for the given internal name. It's the caller's responsibility to {@link |
| * ClassVisitor#visit} the returned object to initialize the desired class, and to avoid |
| * confusion, this method throws if the class had already been present. |
| */ |
| public ClassVisitor add(String internalClassName) { |
| ClassNode result = new ClassNode(); |
| checkState( |
| classes.put(internalClassName, result) == null, "Already present: %s", internalClassName); |
| return result; |
| } |
| |
| public ImmutableMap<String, ClassNode> drain() { |
| ImmutableMap<String, ClassNode> result = ImmutableMap.copyOf(classes); |
| classes.clear(); |
| return result; |
| } |
| } |