| // 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.nest; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| import com.google.common.collect.ImmutableList; |
| import com.google.devtools.build.android.desugar.io.FileContentProvider; |
| import com.google.devtools.build.android.desugar.langmodel.ClassAttributeRecord; |
| import com.google.devtools.build.android.desugar.langmodel.ClassAttributeRecord.ClassAttributeRecordBuilder; |
| import com.google.devtools.build.android.desugar.langmodel.ClassMemberRecord; |
| import com.google.devtools.build.android.desugar.langmodel.ClassMemberRecord.ClassMemberRecordBuilder; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import org.objectweb.asm.ClassReader; |
| |
| /** |
| * An analyzer that performs nest-based analysis and save the states to {@link ClassMemberRecord} |
| * and generated {@link NestDigest}. |
| */ |
| public class NestAnalyzer { |
| |
| private final ImmutableList<FileContentProvider<? extends InputStream>> inputFileContents; |
| private final ClassMemberRecordBuilder classMemberRecord; |
| private final ClassAttributeRecordBuilder classAttributeRecord; |
| |
| /** |
| * Perform a nest-based analysis of input classes, including tracking private member access |
| * outside its owner. |
| * |
| * @return A manager class for nest companions. |
| */ |
| public static NestDigest analyzeNests( |
| ImmutableList<FileContentProvider<? extends InputStream>> inputFileContents) |
| throws IOException { |
| NestAnalyzer nestAnalyzer = |
| new NestAnalyzer( |
| inputFileContents, ClassAttributeRecord.builder(), ClassMemberRecord.builder()); |
| return nestAnalyzer.analyze(); |
| } |
| |
| private NestAnalyzer( |
| ImmutableList<FileContentProvider<? extends InputStream>> inputFileContents, |
| ClassAttributeRecordBuilder classAttributeRecord, |
| ClassMemberRecordBuilder classMemberRecord) { |
| this.inputFileContents = checkNotNull(inputFileContents); |
| this.classMemberRecord = classMemberRecord; |
| this.classAttributeRecord = classAttributeRecord; |
| } |
| |
| /** Performs class member declaration and usage analysis of files. */ |
| private NestDigest analyze() throws IOException { |
| for (FileContentProvider<? extends InputStream> inputClassFile : inputFileContents) { |
| if (inputClassFile.isClassFile()) { |
| try (InputStream inputStream = inputClassFile.get()) { |
| ClassReader cr = new ClassReader(inputStream); |
| CrossMateMainCollector cv = |
| new CrossMateMainCollector(classMemberRecord, classAttributeRecord); |
| cr.accept(cv, 0); |
| } |
| } |
| } |
| |
| return NestDigest.builder() |
| .setClassMemberRecord(classMemberRecord.build().filterUsedMemberWithTrackedDeclaration()) |
| .setClassAttributeRecord(classAttributeRecord.build()) |
| .build(); |
| } |
| } |