| // Copyright 2019 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.base.Preconditions.checkState; |
| |
| import java.io.InputStream; |
| import javax.inject.Provider; |
| |
| /** |
| * A provider of an input stream with a file path label. The struct can be used to index byte code |
| * files in a jar file, and serve as the reading source for the ASM library's class reader {@link |
| * org.objectweb.asm.ClassReader}. |
| */ |
| public final class FileContentProvider<S extends InputStream> implements Provider<S> { |
| |
| private final String binaryPathName; |
| private final Provider<S> inputStreamProvider; |
| |
| public FileContentProvider(String inArchiveBinaryPathName, Provider<S> inputStreamProvider) { |
| checkState( |
| !inArchiveBinaryPathName.startsWith("/"), |
| "Expect inArchiveBinaryPathName is relative: (%s)", |
| inArchiveBinaryPathName); |
| this.binaryPathName = inArchiveBinaryPathName; |
| this.inputStreamProvider = inputStreamProvider; |
| } |
| |
| public String getBinaryPathName() { |
| return binaryPathName; |
| } |
| |
| @Override |
| public S get() { |
| return inputStreamProvider.get(); |
| } |
| |
| public boolean isClassFile() { |
| return binaryPathName.endsWith(".class"); |
| } |
| |
| @Override |
| public String toString() { |
| return String.format("Binary Path: (%s)", binaryPathName); |
| } |
| } |