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/*
* Copyright (C) 2009 The Project Lombok Authors.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package lombok.javac.disableCheckedExceptions;
import java.lang.instrument.Instrumentation;
import java.util.Set;
import javax.annotation.processing.AbstractProcessor;
import javax.annotation.processing.ProcessingEnvironment;
import javax.annotation.processing.RoundEnvironment;
import javax.annotation.processing.SupportedAnnotationTypes;
import javax.annotation.processing.SupportedSourceVersion;
import javax.lang.model.SourceVersion;
import javax.lang.model.element.Element;
import javax.lang.model.element.TypeElement;
import javax.tools.Diagnostic.Kind;
import lombok.patcher.ClassRootFinder;
import lombok.patcher.Hook;
import lombok.patcher.MethodTarget;
import lombok.patcher.ScriptManager;
import lombok.patcher.inject.LiveInjector;
import lombok.patcher.scripts.ScriptBuilder;
@SupportedAnnotationTypes("*")
@SupportedSourceVersion(SourceVersion.RELEASE_6)
public class DisableCheckedExceptionsAgent extends AbstractProcessor {
private String errorToShow;
/** Inject an agent if we're on a sun-esque JVM. */
@Override public void init(ProcessingEnvironment procEnv) {
super.init(procEnv);
String className = procEnv.getClass().getName();
if (className.startsWith("org.eclipse.jdt.")) {
errorToShow = "This version of disableCheckedExceptions is not compatible with eclipse. javac only; sorry.";
procEnv.getMessager().printMessage(Kind.WARNING, errorToShow);
} else if (!procEnv.getClass().getName().equals("com.sun.tools.javac.processing.JavacProcessingEnvironment")) {
procEnv.getMessager().printMessage(Kind.WARNING, "You aren't using a compiler based around javac v1.6, so disableCheckedExceptions will not work.\n" +
"Your processor class is: " + className);
} else {
new LiveInjector().inject(ClassRootFinder.findClassRootOfClass(DisableCheckedExceptionsAgent.class));
}
}
/** Does nothing - we just wanted the init method so we can inject an agent. */
@Override public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
if (errorToShow != null) {
if (errorToShow != null) {
Set<? extends Element> rootElements = roundEnv.getRootElements();
if (!rootElements.isEmpty()) {
processingEnv.getMessager().printMessage(Kind.WARNING, errorToShow, rootElements.iterator().next());
errorToShow = null;
}
}
}
return false;
}
public static void agentmain(String agentArgs, Instrumentation instrumentation) throws Exception {
registerPatchScripts(instrumentation, true);
}
public static void premain(String agentArgs, Instrumentation instrumentation) throws Exception {
registerPatchScripts(instrumentation, false);
}
private static void registerPatchScripts(Instrumentation instrumentation, boolean reloadExistingClasses) {
ScriptManager sm = new ScriptManager();
sm.registerTransformer(instrumentation);
patchExceptions(sm);
if (reloadExistingClasses) sm.reloadClasses(instrumentation);
}
private static void patchExceptions(ScriptManager sm) {
sm.addScript(ScriptBuilder.exitEarly()
.target(new MethodTarget("com.sun.tools.javac.comp.Check", "isUnchecked",
"boolean", "com.sun.tools.javac.code.Symbol$ClassSymbol"))
.decisionMethod(new Hook("lombok.javac.disableCheckedExceptions.DisableCheckedExceptionsAgent", "retTrue", "boolean"))
.valueMethod(new Hook("lombok.javac.disableCheckedExceptions.DisableCheckedExceptionsAgent", "retTrue", "boolean"))
.insert().build());
}
public static boolean retTrue() {
return true;
}
}
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