org.gradle.internal.snapshot.impl.ImplementationSnapshot Maven / Gradle / Ivy
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Gradle 6.9.1 API redistribution.
/*
* Copyright 2017 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.snapshot.impl;
import org.gradle.internal.classloader.ClassLoaderHierarchyHasher;
import org.gradle.internal.hash.HashCode;
import org.gradle.internal.hash.Hasher;
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 org.gradle.internal.snapshot.ValueSnapshot;
import org.gradle.internal.snapshot.ValueSnapshotter;
import javax.annotation.Nullable;
/**
* Identifies a type in a classloader hierarchy. The type is identified by its name,
* the classloader hierarchy by its hash code.
*/
public abstract class ImplementationSnapshot implements ValueSnapshot {
private static final String GENERATED_LAMBDA_CLASS_SUFFIX = "$$Lambda$";
private final String typeName;
public static ImplementationSnapshot of(Class type, ClassLoaderHierarchyHasher classLoaderHasher) {
String className = type.getName();
return of(className, classLoaderHasher.getClassLoaderHash(type.getClassLoader()), type.isSynthetic() && isLambdaClassName(className));
}
public static ImplementationSnapshot of(String className, @Nullable HashCode classLoaderHash) {
return of(className, classLoaderHash, isLambdaClassName(className));
}
private static ImplementationSnapshot of(String typeName, @Nullable HashCode classLoaderHash, boolean lambda) {
if (classLoaderHash == null) {
return new UnknownClassloaderImplementationSnapshot(typeName);
}
if (lambda) {
return new LambdaImplementationSnapshot(typeName);
}
return new DefaultImplementationSnapshot(typeName, classLoaderHash);
}
private static boolean isLambdaClassName(String className) {
return className.contains(GENERATED_LAMBDA_CLASS_SUFFIX);
}
protected ImplementationSnapshot(String typeName) {
this.typeName = typeName;
}
public String getTypeName() {
return typeName;
}
@Nullable
public abstract HashCode getClassLoaderHash();
public abstract boolean isUnknown();
@Nullable
public abstract String getUnknownReason();
@Override
public ValueSnapshot snapshot(Object value, ValueSnapshotter snapshotter) {
ValueSnapshot other = snapshotter.snapshot(value);
if (this.isSameSnapshot(other)) {
return this;
}
return other;
}
protected abstract boolean isSameSnapshot(Object o);
private static class DefaultImplementationSnapshot extends ImplementationSnapshot {
private final HashCode classLoaderHash;
public DefaultImplementationSnapshot(String typeName, HashCode classLoaderHash) {
super(typeName);
this.classLoaderHash = classLoaderHash;
}
@Override
public void appendToHasher(Hasher hasher) {
hasher.putString(ImplementationSnapshot.class.getName());
hasher.putString(getTypeName());
hasher.putHash(classLoaderHash);
}
@Override
protected boolean isSameSnapshot(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
DefaultImplementationSnapshot that = (DefaultImplementationSnapshot) o;
if (!getTypeName().equals(that.getTypeName())) {
return false;
}
return classLoaderHash.equals(that.classLoaderHash);
}
@Override
public HashCode getClassLoaderHash() {
return classLoaderHash;
}
@Override
public boolean isUnknown() {
return false;
}
@Override
@Nullable
public String getUnknownReason() {
return null;
}
@Override
public boolean equals(Object o) {
if (o == null || getClass() != o.getClass()) {
return false;
}
DefaultImplementationSnapshot that = (DefaultImplementationSnapshot) o;
if (this == o) {
return true;
}
if (!getTypeName().equals(that.getTypeName())) {
return false;
}
return classLoaderHash.equals(that.classLoaderHash);
}
@Override
public int hashCode() {
int result = super.hashCode();
result = 31 * result + classLoaderHash.hashCode();
return result;
}
@Override
public String toString() {
return getTypeName() + "@" + classLoaderHash;
}
}
private static class LambdaImplementationSnapshot extends ImplementationSnapshot {
public LambdaImplementationSnapshot(String typeName) {
super(typeName);
}
@Override
public void appendToHasher(Hasher hasher) {
hasher.markAsInvalid(getUnknownReason());
}
@Override
protected boolean isSameSnapshot(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
LambdaImplementationSnapshot that = (LambdaImplementationSnapshot) o;
return getTypeName().equals(that.getTypeName());
}
@Override
public HashCode getClassLoaderHash() {
return null;
}
@Override
public boolean isUnknown() {
return true;
}
@Override
@Nullable
public String getUnknownReason() {
return "was implemented by the Java lambda '" + getTypeName() + "'. Using Java lambdas is not supported, use an (anonymous) inner class instead.";
}
@Override
public boolean equals(Object o) {
return false;
}
@Override
public int hashCode() {
return getTypeName().hashCode();
}
@Override
public String toString() {
return getTypeName();
}
}
private static class UnknownClassloaderImplementationSnapshot extends ImplementationSnapshot {
public UnknownClassloaderImplementationSnapshot(String typeName) {
super(typeName);
}
@Override
public void appendToHasher(Hasher hasher) {
hasher.markAsInvalid(getUnknownReason());
}
@Override
protected boolean isSameSnapshot(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
UnknownClassloaderImplementationSnapshot that = (UnknownClassloaderImplementationSnapshot) o;
return getTypeName().equals(that.getTypeName());
}
@Override
public HashCode getClassLoaderHash() {
return null;
}
@Override
public boolean isUnknown() {
return true;
}
@Override
@Nullable
public String getUnknownReason() {
return "was loaded with an unknown classloader (class '" + getTypeName() + "').";
}
@Override
public boolean equals(Object o) {
return false;
}
@Override
public int hashCode() {
return getTypeName().hashCode();
}
@Override
public String toString() {
return getTypeName() + "@" + "";
}
}
public static class SerializerImpl implements Serializer {
private enum ImplementationSnapshotSerializer implements Serializer {
DEFAULT {
@Override
protected ImplementationSnapshot doRead(String typeName, Decoder decoder) throws Exception {
HashCode classLoaderHash = hashCodeSerializer.read(decoder);
return new DefaultImplementationSnapshot(typeName, classLoaderHash);
}
@Override
public void writeAdditionalData(Encoder encoder, ImplementationSnapshot implementationSnapshot) throws Exception {
hashCodeSerializer.write(encoder, implementationSnapshot.getClassLoaderHash());
}
},
UNKNOWN_CLASSLOADER {
@Override
protected ImplementationSnapshot doRead(String typeName, Decoder decoder) {
return new UnknownClassloaderImplementationSnapshot(typeName);
}
},
LAMBDA {
@Override
protected ImplementationSnapshot doRead(String typeName, Decoder decoder) {
return new LambdaImplementationSnapshot(typeName);
}
};
@Override
public void write(Encoder encoder, ImplementationSnapshot implementationSnapshot) throws Exception {
encoder.writeString(implementationSnapshot.getTypeName());
writeAdditionalData(encoder, implementationSnapshot);
}
@Override
public ImplementationSnapshot read(Decoder decoder) throws Exception {
String typeName = decoder.readString();
return doRead(typeName, decoder);
}
protected final Serializer hashCodeSerializer = new HashCodeSerializer();
protected abstract ImplementationSnapshot doRead(String typeName, Decoder decoder) throws Exception;
protected void writeAdditionalData(Encoder encoder, ImplementationSnapshot implementationSnapshot) throws Exception {
}
}
@Override
public ImplementationSnapshot read(Decoder decoder) throws Exception {
ImplementationSnapshotSerializer serializer = ImplementationSnapshotSerializer.values()[decoder.readSmallInt()];
return serializer.read(decoder);
}
@Override
public void write(Encoder encoder, ImplementationSnapshot implementationSnapshot) throws Exception {
ImplementationSnapshotSerializer serializer = determineSerializer(implementationSnapshot);
encoder.writeSmallInt(serializer.ordinal());
serializer.write(encoder, implementationSnapshot);
}
private ImplementationSnapshotSerializer determineSerializer(ImplementationSnapshot implementationSnapshot) {
if (implementationSnapshot instanceof DefaultImplementationSnapshot) {
return ImplementationSnapshotSerializer.DEFAULT;
}
if (implementationSnapshot instanceof UnknownClassloaderImplementationSnapshot) {
return ImplementationSnapshotSerializer.UNKNOWN_CLASSLOADER;
}
if (implementationSnapshot instanceof LambdaImplementationSnapshot) {
return ImplementationSnapshotSerializer.LAMBDA;
}
throw new IllegalArgumentException("Unknown implementation snapshot type: " + implementationSnapshot.getClass().getName());
}
}
}
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