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DefaultProblemDiagnosticsFactory.java
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DefaultProblemDiagnosticsFactory.java
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/*
* Copyright 2023 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.problems;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Supplier;
import com.google.common.collect.ImmutableList;
import org.gradle.api.NonNullApi;
import org.gradle.internal.code.UserCodeApplicationContext;
import org.gradle.internal.code.UserCodeSource;
import org.gradle.internal.problems.failure.Failure;
import org.gradle.internal.problems.failure.FailureFactory;
import org.gradle.problems.Location;
import org.gradle.problems.ProblemDiagnostics;
import org.gradle.problems.buildtree.ProblemDiagnosticsFactory;
import org.gradle.problems.buildtree.ProblemStream;
import javax.annotation.Nullable;
import javax.inject.Inject;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
public class DefaultProblemDiagnosticsFactory implements ProblemDiagnosticsFactory {
private static class CopyStackTraceTransFormer implements ProblemStream.StackTraceTransformer {
@Override
public List<StackTraceElement> transform(StackTraceElement[] original) {
return ImmutableList.copyOf(original);
}
}
private static final ProblemStream.StackTraceTransformer NO_OP = new CopyStackTraceTransFormer();
private static final Supplier<Throwable> EXCEPTION_FACTORY = new Supplier<Throwable>() {
@Override
public Throwable get() {
return new Exception();
}
};
private final FailureFactory failureFactory;
private final ProblemLocationAnalyzer locationAnalyzer;
private final UserCodeApplicationContext userCodeContext;
private final int maxStackTraces;
@Inject
public DefaultProblemDiagnosticsFactory(
FailureFactory failureFactory,
ProblemLocationAnalyzer locationAnalyzer,
UserCodeApplicationContext userCodeContext
) {
this(failureFactory, locationAnalyzer, userCodeContext, 50);
}
@VisibleForTesting
DefaultProblemDiagnosticsFactory(
FailureFactory failureFactory,
ProblemLocationAnalyzer locationAnalyzer,
UserCodeApplicationContext userCodeContext,
int maxStackTraces
) {
this.failureFactory = failureFactory;
this.locationAnalyzer = locationAnalyzer;
this.userCodeContext = userCodeContext;
this.maxStackTraces = maxStackTraces;
}
@Override
public ProblemStream newStream() {
return new DefaultProblemStream();
}
@Override
public ProblemStream newUnlimitedStream() {
DefaultProblemStream defaultProblemStream = new DefaultProblemStream();
defaultProblemStream.remainingStackTraces.set(Integer.MAX_VALUE);
return defaultProblemStream;
}
@Override
public ProblemDiagnostics forException(Throwable exception) {
return locationFromStackTrace(exception, true, true, NO_OP);
}
private ProblemDiagnostics locationFromStackTrace(@Nullable Throwable throwable, boolean fromException, boolean keepException, ProblemStream.StackTraceTransformer transformer) {
UserCodeApplicationContext.Application applicationContext = userCodeContext.current();
if (applicationContext == null && throwable == null) {
return NoOpProblemDiagnosticsFactory.EMPTY_DIAGNOSTICS;
}
List<StackTraceElement> stackTrace = Collections.emptyList();
Failure stackTracingFailure = null;
Location location = null;
if (throwable != null) {
stackTrace = transformer.transform(throwable.getStackTrace());
stackTracingFailure = failureFactory.create(throwable);
location = locationAnalyzer.locationForUsage(stackTracingFailure, fromException);
}
UserCodeSource source = applicationContext != null ? applicationContext.getSource() : null;
return new DefaultProblemDiagnostics(stackTracingFailure, keepException ? throwable : null, stackTrace, location, source);
}
@NonNullApi
private class DefaultProblemStream implements ProblemStream {
private final AtomicInteger remainingStackTraces = new AtomicInteger();
public DefaultProblemStream() {
remainingStackTraces.set(maxStackTraces);
}
@Override
public ProblemDiagnostics forCurrentCaller(@Nullable Throwable exception) {
if (exception == null) {
return locationFromStackTrace(getImplicitThrowable(EXCEPTION_FACTORY), false, false, NO_OP);
} else {
return locationFromStackTrace(exception, true, true, NO_OP);
}
}
@Override
public ProblemDiagnostics forCurrentCaller() {
return locationFromStackTrace(getImplicitThrowable(EXCEPTION_FACTORY), false, false, NO_OP);
}
@Override
public ProblemDiagnostics forCurrentCaller(Supplier<? extends Throwable> exceptionFactory) {
return locationFromStackTrace(getImplicitThrowable(exceptionFactory), false, true, NO_OP);
}
@Override
public ProblemDiagnostics forCurrentCaller(StackTraceTransformer transformer) {
return locationFromStackTrace(getImplicitThrowable(EXCEPTION_FACTORY), false, false, transformer);
}
@Nullable
private Throwable getImplicitThrowable(Supplier<? extends Throwable> factory) {
if (remainingStackTraces.getAndDecrement() > 0) {
return factory.get();
} else {
return null;
}
}
}
private static class DefaultProblemDiagnostics implements ProblemDiagnostics {
private final Failure failure;
private final Throwable exception;
private final List<StackTraceElement> stackTrace;
private final Location location;
private final UserCodeSource source;
public DefaultProblemDiagnostics(
@Nullable Failure stackTracingFailure,
@Nullable Throwable exception,
List<StackTraceElement> stackTrace,
@Nullable Location location,
@Nullable UserCodeSource source
) {
this.failure = stackTracingFailure;
this.exception = exception;
this.stackTrace = stackTrace;
this.location = location;
this.source = source;
}
@Nullable
@Override
public Failure getFailure() {
return failure;
}
@Nullable
@Override
public Throwable getException() {
return exception;
}
@Override
public List<StackTraceElement> getStack() {
return stackTrace;
}
@Nullable
@Override
public Location getLocation() {
return location;
}
@Nullable
@Override
public UserCodeSource getSource() {
return source;
}
}
}