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/*
* Copyright 2000-2012 JetBrains s.r.o.
*
* 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.jetbrains.jps.incremental.instrumentation;
import com.intellij.compiler.instrumentation.InstrumentationClassFinder;
import com.intellij.compiler.instrumentation.InstrumenterClassWriter;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.util.Key;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.asm4.ClassReader;
import org.jetbrains.asm4.ClassWriter;
import org.jetbrains.jps.ModuleChunk;
import org.jetbrains.jps.incremental.BinaryContent;
import org.jetbrains.jps.incremental.BuilderCategory;
import org.jetbrains.jps.incremental.CompileContext;
import org.jetbrains.jps.incremental.CompiledClass;
import org.jetbrains.jps.incremental.messages.BuildMessage;
import org.jetbrains.jps.incremental.messages.CompilerMessage;
/**
* @author Eugene Zhuravlev
* Date: 11/25/12
*/
public abstract class BaseInstrumentingBuilder extends ClassProcessingBuilder {
private static final Logger LOG = Logger.getInstance("#org.jetbrains.jps.incremental.instrumentation.BaseInstrumentingBuilder");
// every instance of builder must have its own marker!
private final Key<Boolean> IS_INSTRUMENTED_KEY = Key.create("_instrumentation_marker_" + getPresentableName());
public BaseInstrumentingBuilder() {
super(BuilderCategory.CLASS_INSTRUMENTER);
}
@Override
protected final ExitCode performBuild(CompileContext context, ModuleChunk chunk, InstrumentationClassFinder finder, OutputConsumer outputConsumer) {
ExitCode exitCode = ExitCode.NOTHING_DONE;
for (CompiledClass compiledClass : outputConsumer.getCompiledClasses().values()) {
final BinaryContent originalContent = compiledClass.getContent();
final ClassReader reader = new ClassReader(originalContent.getBuffer(), originalContent.getOffset(), originalContent.getLength());
final int version = getClassFileVersion(reader);
if (IS_INSTRUMENTED_KEY.get(compiledClass, Boolean.FALSE) || !canInstrument(compiledClass, version)) {
// do not instrument the same content twice
continue;
}
final ClassWriter writer = new InstrumenterClassWriter(getAsmClassWriterFlags(version), finder);
try {
final BinaryContent instrumented = instrument(context, compiledClass, reader, writer, finder);
if (instrumented != null) {
compiledClass.setContent(instrumented);
finder.cleanCachedData(compiledClass.getClassName());
IS_INSTRUMENTED_KEY.set(compiledClass, Boolean.TRUE);
exitCode = ExitCode.OK;
}
}
catch (Throwable e) {
LOG.info(e);
final String message = e.getMessage();
if (message != null) {
context.processMessage(new CompilerMessage(getPresentableName(), BuildMessage.Kind.ERROR, message, compiledClass.getSourceFile().getPath()));
}
else {
context.processMessage(new CompilerMessage(getPresentableName(), e));
}
}
}
return exitCode;
}
protected abstract boolean canInstrument(CompiledClass compiledClass, int classFileVersion);
@Nullable
protected abstract BinaryContent instrument(CompileContext context,
CompiledClass compiled,
ClassReader reader,
ClassWriter writer,
InstrumentationClassFinder finder);
}
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