/*
* Copyright 2016 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.changedetection.state;
import com.google.common.hash.HashCode;
import com.google.common.hash.Hasher;
import com.google.common.hash.Hashing;
import com.google.common.io.ByteStreams;
import org.gradle.api.internal.tasks.compile.ApiClassExtractor;
import org.gradle.caching.internal.BuildCacheHasher;
import org.gradle.internal.IoActions;
import org.gradle.util.DeprecationLogger;
import org.gradle.util.internal.Java9ClassReader;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.Collections;
import java.util.zip.ZipEntry;
public class AbiExtractingClasspathResourceHasher implements ResourceHasher {
private HashCode hashClassBytes(InputStream inputStream) throws IOException {
// Use the ABI as the hash
byte[] classBytes = ByteStreams.toByteArray(inputStream);
ApiClassExtractor extractor = new ApiClassExtractor(Collections.<String>emptySet());
Java9ClassReader reader = new Java9ClassReader(classBytes);
if (extractor.shouldExtractApiClassFrom(reader)) {
byte[] signature = extractor.extractApiClassFrom(reader);
if (signature != null) {
Hasher hasher = Hashing.md5().newHasher();
hasher.putBytes(signature);
return hasher.hash();
}
}
return null;
}
@Override
public HashCode hash(RegularFileSnapshot fileSnapshot) {
String name = fileSnapshot.getName();
if (!isClassFile(name)) {
return null;
}
InputStream inputStream = null;
try {
inputStream = Files.newInputStream(Paths.get(fileSnapshot.getPath()));
return hashClassBytes(inputStream);
} catch (Exception e) {
DeprecationLogger.nagUserWith("Malformed class file [" + name + "] found on compile classpath, which means that this class will cause a compile error if referenced in a source file. Gradle 5.0 will no longer allow malformed classes on compile classpath.");
return fileSnapshot.getContent().getContentMd5();
} finally {
IoActions.closeQuietly(inputStream);
}
}
@Override
public HashCode hash(ZipEntry zipEntry, InputStream zipInput) throws IOException {
if (!isClassFile(zipEntry.getName())) {
return null;
}
return hashClassBytes(zipInput);
}
private boolean isClassFile(String name) {
return name.endsWith(".class");
}
@Override
public void appendConfigurationToHasher(BuildCacheHasher hasher) {
hasher.putString(getClass().getName());
}
}