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FileCollectionFingerprintSerializer.java
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FileCollectionFingerprintSerializer.java
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/*
* Copyright 2018 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.internal.execution.history.impl;
import com.google.common.collect.ImmutableMultimap;
import com.google.common.collect.Interner;
import org.gradle.internal.fingerprint.FileCollectionFingerprint;
import org.gradle.internal.fingerprint.FileSystemLocationFingerprint;
import org.gradle.internal.hash.HashCode;
import org.gradle.internal.serialize.Decoder;
import org.gradle.internal.serialize.Encoder;
import org.gradle.internal.serialize.HashCodeSerializer;
import org.gradle.internal.serialize.Serializer;
import java.io.IOException;
import java.util.Map;
public class FileCollectionFingerprintSerializer implements Serializer<FileCollectionFingerprint> {
private final FingerprintMapSerializer fingerprintMapSerializer;
private final Interner<String> stringInterner;
private final HashCodeSerializer hashCodeSerializer;
public FileCollectionFingerprintSerializer(Interner<String> stringInterner) {
this.fingerprintMapSerializer = new FingerprintMapSerializer(stringInterner);
this.stringInterner = stringInterner;
this.hashCodeSerializer = new HashCodeSerializer();
}
@Override
public FileCollectionFingerprint read(Decoder decoder) throws IOException {
Map<String, FileSystemLocationFingerprint> fingerprints = fingerprintMapSerializer.read(decoder);
if (fingerprints.isEmpty()) {
return FileCollectionFingerprint.EMPTY;
}
ImmutableMultimap<String, HashCode> rootHashes = readRootHashes(decoder);
HashCode strategyConfigurationHash = hashCodeSerializer.read(decoder);
return new SerializableFileCollectionFingerprint(fingerprints, rootHashes, strategyConfigurationHash);
}
private ImmutableMultimap<String, HashCode> readRootHashes(Decoder decoder) throws IOException {
int numberOfRoots = decoder.readSmallInt();
if (numberOfRoots == 0) {
return ImmutableMultimap.of();
}
ImmutableMultimap.Builder<String, HashCode> builder = ImmutableMultimap.builder();
for (int i = 0; i < numberOfRoots; i++) {
String absolutePath = stringInterner.intern(decoder.readString());
HashCode rootHash = hashCodeSerializer.read(decoder);
builder.put(absolutePath, rootHash);
}
return builder.build();
}
@Override
public void write(Encoder encoder, FileCollectionFingerprint value) throws Exception {
fingerprintMapSerializer.write(encoder, value.getFingerprints());
if (!value.getFingerprints().isEmpty()) {
writeRootHashes(encoder, value.getRootHashes());
hashCodeSerializer.write(encoder, ((SerializableFileCollectionFingerprint) value).getStrategyConfigurationHash());
}
}
private void writeRootHashes(Encoder encoder, ImmutableMultimap<String, HashCode> rootHashes) throws IOException {
encoder.writeSmallInt(rootHashes.size());
for (Map.Entry<String, HashCode> entry : rootHashes.entries()) {
encoder.writeString(entry.getKey());
hashCodeSerializer.write(encoder, entry.getValue());
}
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
FileCollectionFingerprintSerializer that = (FileCollectionFingerprintSerializer) o;
return fingerprintMapSerializer.equals(that.fingerprintMapSerializer) && hashCodeSerializer.equals(that.hashCodeSerializer);
}
@Override
public int hashCode() {
int result = fingerprintMapSerializer.hashCode();
result = 31 * result + hashCodeSerializer.hashCode();
return result;
}
}