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/*
* Copyright © 2009 Reinier Zwitserloot and Roel Spilker.
*
* 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.eclipse.agent;
import java.lang.instrument.Instrumentation;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import lombok.core.Agent;
import lombok.patcher.Hook;
import lombok.patcher.MethodTarget;
import lombok.patcher.ScriptManager;
import lombok.patcher.StackRequest;
import lombok.patcher.TargetMatcher;
import lombok.patcher.equinox.EquinoxClassLoader;
import lombok.patcher.scripts.ScriptBuilder;
/**
* This is a java-agent that patches some of eclipse's classes so AST Nodes are handed off to Lombok
* for modification before Eclipse actually uses them to compile, render errors, show code outlines,
* create auto-completion dialogs, and anything else eclipse does with java code. See the *Transformer
* classes in this package for more information about which classes are transformed and how they are
* transformed.
*/
public class EclipsePatcher extends Agent {
@Override
public void runAgent(String agentArgs, Instrumentation instrumentation, boolean injected) throws Exception {
registerPatchScripts(instrumentation, injected, injected);
}
private static void registerPatchScripts(Instrumentation instrumentation, boolean reloadExistingClasses, boolean ecjOnly) {
ScriptManager sm = new ScriptManager();
sm.registerTransformer(instrumentation);
if (!ecjOnly) {
EquinoxClassLoader.addPrefix("lombok.");
EquinoxClassLoader.registerScripts(sm);
}
patchAvoidReparsingGeneratedCode(sm);
if (!ecjOnly) {
patchLombokizeAST(sm);
patchCatchReparse(sm);
patchSetGeneratedFlag(sm);
patchHideGeneratedNodes(sm);
patchLiveDebug(sm);
}
if (reloadExistingClasses) sm.reloadClasses(instrumentation);
}
private static void patchHideGeneratedNodes(ScriptManager sm) {
sm.addScript(ScriptBuilder.wrapReturnValue()
.target(new MethodTarget("org.eclipse.jdt.internal.corext.dom.LinkedNodeFinder", "findByNode"))
.target(new MethodTarget("org.eclipse.jdt.internal.corext.dom.LinkedNodeFinder", "findByBinding"))
.wrapMethod(new Hook("lombok.eclipse.agent.PatchFixes", "removeGeneratedSimpleNames", "org.eclipse.jdt.core.dom.SimpleName[]",
"org.eclipse.jdt.core.dom.SimpleName[]"))
.request(StackRequest.RETURN_VALUE).build());
patchRefactorScripts(sm);
patchFormatters(sm);
}
private static void patchFormatters(ScriptManager sm) {
sm.addScript(ScriptBuilder.setSymbolDuringMethodCall()
.target(new MethodTarget("org.eclipse.jdt.internal.ui.text.java.JavaFormattingStrategy", "format", "void"))
.callToWrap(new Hook("org.eclipse.jdt.internal.corext.util.CodeFormatterUtil", "reformat", "org.eclipse.text.edits.TextEdit",
"int", "java.lang.String", "int", "int", "int", "java.lang.String", "java.util.Map"))
.symbol("lombok.disable").build());
}
private static void patchRefactorScripts(ScriptManager sm) {
sm.addScript(ScriptBuilder.exitEarly()
.target(new MethodTarget("org.eclipse.jdt.core.dom.rewrite.ASTRewrite", "replace"))
.target(new MethodTarget("org.eclipse.jdt.core.dom.rewrite.ASTRewrite", "remove"))
.decisionMethod(new Hook("lombok.eclipse.agent.PatchFixes", "skipRewritingGeneratedNodes", "boolean",
"org.eclipse.jdt.core.dom.ASTNode"))
.transplant().request(StackRequest.PARAM1).build());
sm.addScript(ScriptBuilder.wrapMethodCall()
.target(new MethodTarget("org.eclipse.jdt.internal.corext.refactoring.rename.RenameTypeProcessor", "addConstructorRenames"))
.methodToWrap(new Hook("org.eclipse.jdt.core.IType", "getMethods", "org.eclipse.jdt.core.IMethod[]"))
.wrapMethod(new Hook("lombok.eclipse.agent.PatchFixes", "removeGeneratedMethods", "org.eclipse.jdt.core.IMethod[]",
"org.eclipse.jdt.core.IMethod[]"))
.transplant().build());
}
private static void patchCatchReparse(ScriptManager sm) {
sm.addScript(ScriptBuilder.wrapReturnValue()
.target(new MethodTarget("org.eclipse.jdt.core.dom.ASTConverter", "retrieveStartingCatchPosition"))
.wrapMethod(new Hook("lombok.eclipse.agent.PatchFixes", "fixRetrieveStartingCatchPosition", "int", "int"))
.transplant().request(StackRequest.PARAM1).build());
}
private static void patchSetGeneratedFlag(ScriptManager sm) {
sm.addScript(ScriptBuilder.addField()
.targetClass("org.eclipse.jdt.internal.compiler.ast.ASTNode")
.fieldName("$generatedBy")
.fieldType("Lorg/eclipse/jdt/internal/compiler/ast/ASTNode;")
.setPublic().setTransient().build());
sm.addScript(ScriptBuilder.addField()
.targetClass("org.eclipse.jdt.core.dom.ASTNode")
.fieldName("$isGenerated").fieldType("Z")
.setPublic().setTransient().build());
sm.addScript(ScriptBuilder.wrapReturnValue()
.target(new TargetMatcher() {
@Override public boolean matches(String classSpec, String methodName, String descriptor) {
if (!"convert".equals(methodName)) return false;
List<String> fullDesc = MethodTarget.decomposeFullDesc(descriptor);
if ("V".equals(fullDesc.get(0))) return false;
if (fullDesc.size() < 2) return false;
if (!fullDesc.get(1).startsWith("Lorg/eclipse/jdt/internal/compiler/ast/")) return false;
return true;
}
@Override public Collection<String> getAffectedClasses() {
return Collections.singleton("org.eclipse.jdt.core.dom.ASTConverter");
}
}).request(StackRequest.PARAM1, StackRequest.RETURN_VALUE)
.wrapMethod(new Hook("lombok.eclipse.agent.PatchFixes", "setIsGeneratedFlag", "void",
"org.eclipse.jdt.core.dom.ASTNode", "org.eclipse.jdt.internal.compiler.ast.ASTNode"))
.transplant().build());
sm.addScript(ScriptBuilder.wrapMethodCall()
.target(new TargetMatcher() {
@Override public boolean matches(String classSpec, String methodName, String descriptor) {
if (!methodName.startsWith("convert")) return false;
List<String> fullDesc = MethodTarget.decomposeFullDesc(descriptor);
if (fullDesc.size() < 2) return false;
if (!fullDesc.get(1).startsWith("Lorg/eclipse/jdt/internal/compiler/ast/")) return false;
return true;
}
@Override public Collection<String> getAffectedClasses() {
return Collections.singleton("org.eclipse.jdt.core.dom.ASTConverter");
}
}).methodToWrap(new Hook("org.eclipse.jdt.core.dom.SimpleName", "<init>", "void", "org.eclipse.jdt.core.dom.AST"))
.requestExtra(StackRequest.PARAM1)
.wrapMethod(new Hook("lombok.eclipse.agent.PatchFixes", "setIsGeneratedFlagForSimpleName", "void",
"org.eclipse.jdt.core.dom.SimpleName", "java.lang.Object"))
.transplant().build());
}
/**
* XXX LIVE DEBUG
*
* Adds patches to improve error reporting in cases of extremely rare bugs that are hard to reproduce. These should be removed
* once the issue has been solved!
*/
private static void patchLiveDebug(ScriptManager sm) {
sm.addScript(ScriptBuilder.exitEarly()
.target(new MethodTarget(
"org.eclipse.jdt.internal.compiler.ast.MethodDeclaration", "resolveStatements", "void"))
.decisionMethod(new Hook("lombok.eclipse.agent.PatchFixes", "debugPrintStateOfScope", "boolean", "java.lang.Object"))
.request(StackRequest.THIS).build());
}
private static void patchAvoidReparsingGeneratedCode(ScriptManager sm) {
final String PARSER_SIG = "org.eclipse.jdt.internal.compiler.parser.Parser";
sm.addScript(ScriptBuilder.exitEarly()
.target(new MethodTarget(PARSER_SIG, "parse", "void",
"org.eclipse.jdt.internal.compiler.ast.MethodDeclaration",
"org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration"))
.decisionMethod(new Hook("lombok.eclipse.agent.PatchFixes", "checkBit24", "boolean", "java.lang.Object"))
.request(StackRequest.PARAM1).build());
sm.addScript(ScriptBuilder.exitEarly()
.target(new MethodTarget(PARSER_SIG, "parse", "void",
"org.eclipse.jdt.internal.compiler.ast.ConstructorDeclaration",
"org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration", "boolean"))
.decisionMethod(new Hook("lombok.eclipse.agent.PatchFixes", "checkBit24", "boolean", "java.lang.Object"))
.request(StackRequest.PARAM1).build());
sm.addScript(ScriptBuilder.exitEarly()
.target(new MethodTarget(PARSER_SIG, "parse", "void",
"org.eclipse.jdt.internal.compiler.ast.Initializer",
"org.eclipse.jdt.internal.compiler.ast.TypeDeclaration",
"org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration"))
.decisionMethod(new Hook("lombok.eclipse.agent.PatchFixes", "checkBit24", "boolean", "java.lang.Object"))
.request(StackRequest.PARAM1).build());
}
private static void patchLombokizeAST(ScriptManager sm) {
sm.addScript(ScriptBuilder.addField()
.targetClass("org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration")
.fieldName("$lombokAST").fieldType("Ljava/lang/Object;")
.setPublic().setTransient().build());
final String PARSER_SIG = "org.eclipse.jdt.internal.compiler.parser.Parser";
final String CUD_SIG = "org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration";
sm.addScript(ScriptBuilder.wrapReturnValue()
.target(new MethodTarget(PARSER_SIG, "getMethodBodies", "void", CUD_SIG))
.wrapMethod(new Hook("lombok.eclipse.TransformEclipseAST", "transform", "void", PARSER_SIG, CUD_SIG))
.request(StackRequest.THIS, StackRequest.PARAM1).build());
sm.addScript(ScriptBuilder.wrapReturnValue()
.target(new MethodTarget(PARSER_SIG, "endParse", CUD_SIG, "int"))
.wrapMethod(new Hook("lombok.eclipse.TransformEclipseAST", "transform_swapped", "void", CUD_SIG, PARSER_SIG))
.request(StackRequest.THIS, StackRequest.RETURN_VALUE).build());
}
}
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