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DefaultClassSetAnalyzer.java
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DefaultClassSetAnalyzer.java
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/*
* Copyright 2013 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.compile.incremental.classpath;
import com.google.common.collect.ImmutableSet;
import org.gradle.api.file.FileVisitDetails;
import org.gradle.api.file.FileVisitor;
import org.gradle.api.internal.file.FileOperations;
import org.gradle.api.internal.tasks.compile.incremental.analyzer.ClassDependenciesAnalyzer;
import org.gradle.api.internal.tasks.compile.incremental.deps.ClassAnalysis;
import org.gradle.api.internal.tasks.compile.incremental.deps.ClassDependentsAccumulator;
import org.gradle.api.internal.tasks.compile.incremental.deps.ClassSetAnalysisData;
import org.gradle.internal.IoActions;
import org.gradle.internal.hash.FileHasher;
import org.gradle.internal.hash.HashCode;
import org.gradle.internal.hash.StreamHasher;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.io.InputStream;
import static org.gradle.internal.FileUtils.hasExtension;
public class DefaultClassSetAnalyzer implements ClassSetAnalyzer {
private static final Logger LOGGER = LoggerFactory.getLogger(DefaultClassSetAnalyzer.class);
private final FileHasher fileHasher;
private final StreamHasher hasher;
private final ClassDependenciesAnalyzer analyzer;
private final FileOperations fileOperations;
public DefaultClassSetAnalyzer(FileHasher fileHasher, StreamHasher streamHasher, ClassDependenciesAnalyzer analyzer, FileOperations fileOperations) {
this.fileHasher = fileHasher;
this.hasher = streamHasher;
this.analyzer = analyzer;
this.fileOperations = fileOperations;
}
public ClassSetAnalysisData analyzeClasspathEntry(File classpathEntry) {
return analyze(classpathEntry, true);
}
@Override
public ClassSetAnalysisData analyzeOutputFolder(File outputFolder) {
return analyze(outputFolder, false);
}
private ClassSetAnalysisData analyze(File classSet, boolean abiOnly) {
final ClassDependentsAccumulator accumulator = new ClassDependentsAccumulator();
try {
visit(classSet, accumulator, abiOnly);
} catch (Exception e) {
accumulator.fullRebuildNeeded(classSet + " could not be analyzed for incremental compilation. See the debug log for more details");
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Could not analyze " + classSet + " for incremental compilation", e);
}
}
return accumulator.getAnalysis();
}
private void visit(File classpathEntry, ClassDependentsAccumulator accumulator, boolean abiOnly) {
if (hasExtension(classpathEntry, ".jar")) {
fileOperations.zipTreeNoLocking(classpathEntry).visit(new JarEntryVisitor(accumulator, abiOnly));
}
if (classpathEntry.isDirectory()) {
fileOperations.fileTree(classpathEntry).visit(new DirectoryEntryVisitor(accumulator, abiOnly));
}
}
private abstract class EntryVisitor implements FileVisitor {
private final ClassDependentsAccumulator accumulator;
private final boolean abiOnly;
public EntryVisitor(ClassDependentsAccumulator accumulator, boolean abiOnly) {
this.accumulator = accumulator;
this.abiOnly = abiOnly;
}
@Override
public void visitDir(FileVisitDetails dirDetails) {
}
@Override
public void visitFile(FileVisitDetails fileDetails) {
if (!fileDetails.getName().endsWith(".class")) {
return;
}
HashCode classFileHash = getHashCode(fileDetails);
try {
ClassAnalysis analysis = maybeStripToAbi(analyzer.getClassAnalysis(classFileHash, fileDetails));
accumulator.addClass(analysis, classFileHash);
} catch (Exception e) {
accumulator.fullRebuildNeeded(fileDetails.getName() + " could not be analyzed for incremental compilation. See the debug log for more details");
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Could not analyze " + fileDetails.getName() + " for incremental compilation", e);
}
}
}
private ClassAnalysis maybeStripToAbi(ClassAnalysis analysis) {
if (abiOnly) {
return new ClassAnalysis(analysis.getClassName(), ImmutableSet.of(), analysis.getAccessibleClassDependencies(), analysis.getDependencyToAllReason(), analysis.getConstants());
} else {
return analysis;
}
}
protected abstract HashCode getHashCode(FileVisitDetails fileDetails);
}
private class JarEntryVisitor extends EntryVisitor {
public JarEntryVisitor(ClassDependentsAccumulator accumulator, boolean abiOnly) {
super(accumulator, abiOnly);
}
@Override
protected HashCode getHashCode(FileVisitDetails fileDetails) {
InputStream inputStream = fileDetails.open();
try {
return hasher.hash(inputStream);
} finally {
IoActions.closeQuietly(inputStream);
}
}
}
private class DirectoryEntryVisitor extends EntryVisitor {
public DirectoryEntryVisitor(ClassDependentsAccumulator accumulator, boolean abiOnly) {
super(accumulator, abiOnly);
}
@Override
protected HashCode getHashCode(FileVisitDetails fileDetails) {
return fileHasher.hash(fileDetails.getFile(), fileDetails.getSize(), fileDetails.getLastModified());
}
}
}