/*
* Copyright (C) 2010-2011 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.
*
* Thanks to Stephen Haberman for a patch to solve some NPEs in Eclipse.
*/
package lombok.eclipse.agent;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.List;
import lombok.Lombok;
import org.eclipse.jdt.core.dom.AST;
import org.eclipse.jdt.core.dom.IExtendedModifier;
import org.eclipse.jdt.core.dom.MarkerAnnotation;
import org.eclipse.jdt.core.dom.Modifier;
import org.eclipse.jdt.core.dom.Modifier.ModifierKeyword;
import org.eclipse.jdt.core.dom.Name;
import org.eclipse.jdt.core.dom.QualifiedName;
import org.eclipse.jdt.core.dom.SimpleName;
import org.eclipse.jdt.core.dom.SingleVariableDeclaration;
import org.eclipse.jdt.core.dom.VariableDeclarationStatement;
import org.eclipse.jdt.internal.compiler.ast.ASTNode;
import org.eclipse.jdt.internal.compiler.ast.AbstractVariableDeclaration;
import org.eclipse.jdt.internal.compiler.ast.Annotation;
import org.eclipse.jdt.internal.compiler.ast.ForeachStatement;
import org.eclipse.jdt.internal.compiler.ast.LocalDeclaration;
import org.eclipse.jdt.internal.compiler.ast.SingleTypeReference;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
import org.eclipse.jdt.internal.compiler.parser.Parser;
public class PatchValEclipse {
public static void copyInitializationOfForEachIterable(Parser parser) {
ASTNode[] astStack;
int astPtr;
try {
astStack = (ASTNode[]) Reflection.astStackField.get(parser);
astPtr = (Integer) Reflection.astPtrField.get(parser);
} catch (Exception e) {
// Most likely we're in ecj or some other plugin usage of the eclipse compiler. No need for this.
return;
}
ForeachStatement foreachDecl = (ForeachStatement) astStack[astPtr];
ASTNode init = foreachDecl.collection;
if (init == null) return;
if (foreachDecl.elementVariable == null || !PatchVal.couldBeVal(foreachDecl.elementVariable.type)) return;
try {
if (Reflection.iterableCopyField != null) Reflection.iterableCopyField.set(foreachDecl.elementVariable, init);
} catch (Exception e) {
// In ecj mode this field isn't there and we don't need the copy anyway, so, we ignore the exception.
}
}
public static void copyInitializationOfLocalDeclaration(Parser parser) {
ASTNode[] astStack;
int astPtr;
try {
astStack = (ASTNode[]) Reflection.astStackField.get(parser);
astPtr = (Integer)Reflection.astPtrField.get(parser);
} catch (Exception e) {
// Most likely we're in ecj or some other plugin usage of the eclipse compiler. No need for this.
return;
}
AbstractVariableDeclaration variableDecl = (AbstractVariableDeclaration) astStack[astPtr];
if (!(variableDecl instanceof LocalDeclaration)) return;
ASTNode init = variableDecl.initialization;
if (init == null) return;
if (!PatchVal.couldBeVal(variableDecl.type)) return;
try {
if (Reflection.initCopyField != null) Reflection.initCopyField.set(variableDecl, init);
} catch (Exception e) {
// In ecj mode this field isn't there and we don't need the copy anyway, so, we ignore the exception.
}
}
public static void addFinalAndValAnnotationToSingleVariableDeclaration(Object converter, SingleVariableDeclaration out, LocalDeclaration in) {
@SuppressWarnings("unchecked") List<IExtendedModifier> modifiers = out.modifiers();
addFinalAndValAnnotationToModifierList(converter, modifiers, out.getAST(), in);
}
public static void addFinalAndValAnnotationToVariableDeclarationStatement(Object converter, VariableDeclarationStatement out, LocalDeclaration in) {
@SuppressWarnings("unchecked") List<IExtendedModifier> modifiers = out.modifiers();
addFinalAndValAnnotationToModifierList(converter, modifiers, out.getAST(), in);
}
public static void addFinalAndValAnnotationToModifierList(Object converter, List<IExtendedModifier> modifiers, AST ast, LocalDeclaration in) {
// First check that 'in' has the final flag on, and a @val / @lombok.val annotation.
if ((in.modifiers & ClassFileConstants.AccFinal) == 0) return;
if (in.annotations == null) return;
boolean found = false;
Annotation valAnnotation = null;
for (Annotation ann : in.annotations) {
if (PatchVal.couldBeVal(ann.type)) {
found = true;
valAnnotation = ann;
break;
}
}
if (!found) return;
// Now check that 'out' is missing either of these.
if (modifiers == null) return; // This is null only if the project is 1.4 or less. Lombok doesn't work in that.
boolean finalIsPresent = false;
boolean valIsPresent = false;
for (Object present : modifiers) {
if (present instanceof Modifier) {
ModifierKeyword keyword = ((Modifier)present).getKeyword();
if (keyword == null) continue;
if (keyword.toFlagValue() == Modifier.FINAL) finalIsPresent = true;
}
if (present instanceof org.eclipse.jdt.core.dom.Annotation) {
Name typeName = ((org.eclipse.jdt.core.dom.Annotation) present).getTypeName();
if (typeName != null) {
String fullyQualifiedName = typeName.getFullyQualifiedName();
if ("val".equals(fullyQualifiedName) || "lombok.val".equals(fullyQualifiedName)) {
valIsPresent = true;
}
}
}
}
if (!finalIsPresent) {
modifiers.add(
createModifier(ast, ModifierKeyword.FINAL_KEYWORD, valAnnotation.sourceStart, valAnnotation.sourceEnd));
}
if (!valIsPresent) {
MarkerAnnotation newAnnotation = createValAnnotation(ast, valAnnotation, valAnnotation.sourceStart, valAnnotation.sourceEnd);
try {
Reflection.astConverterRecordNodes.invoke(converter, newAnnotation, valAnnotation);
Reflection.astConverterRecordNodes.invoke(converter, newAnnotation.getTypeName(), valAnnotation.type);
} catch (IllegalAccessException e) {
throw Lombok.sneakyThrow(e);
} catch (InvocationTargetException e) {
throw Lombok.sneakyThrow(e.getCause());
}
modifiers.add(newAnnotation);
}
}
public static Modifier createModifier(AST ast, ModifierKeyword keyword, int start, int end) {
Modifier modifier = null;
try {
modifier = Reflection.modifierConstructor.newInstance(ast);
} catch (InstantiationException e) {
throw Lombok.sneakyThrow(e);
} catch (IllegalAccessException e) {
throw Lombok.sneakyThrow(e);
} catch (InvocationTargetException e) {
throw Lombok.sneakyThrow(e);
}
if (modifier != null) {
modifier.setKeyword(keyword);
modifier.setSourceRange(start, end - start + 1);
}
return modifier;
}
public static MarkerAnnotation createValAnnotation(AST ast, Annotation original, int start, int end) {
MarkerAnnotation out = null;
try {
out = Reflection.markerAnnotationConstructor.newInstance(ast);
} catch (InstantiationException e) {
throw Lombok.sneakyThrow(e);
} catch (IllegalAccessException e) {
throw Lombok.sneakyThrow(e);
} catch (InvocationTargetException e) {
throw Lombok.sneakyThrow(e);
}
if (out != null) {
SimpleName valName = ast.newSimpleName("val");
valName.setSourceRange(start, end - start + 1);
if (original.type instanceof SingleTypeReference) {
out.setTypeName(valName);
setIndex(valName, 1);
} else {
SimpleName lombokName = ast.newSimpleName("lombok");
lombokName.setSourceRange(start, end - start + 1);
setIndex(lombokName, 1);
setIndex(valName, 2);
QualifiedName fullName = ast.newQualifiedName(lombokName, valName);
setIndex(fullName, 1);
fullName.setSourceRange(start, end - start + 1);
out.setTypeName(fullName);
}
out.setSourceRange(start, end - start + 1);
}
return out;
}
private static final Field FIELD_NAME_INDEX;
static {
Field f = null;
try {
f = Name.class.getDeclaredField("index");
f.setAccessible(true);
} catch (Throwable t) {
// Leave it null, in which case we don't set index. That'll result in error log messages but its better than crashing here.
}
FIELD_NAME_INDEX = f;
}
private static void setIndex(Name name, int index) {
try {
if (FIELD_NAME_INDEX != null) FIELD_NAME_INDEX.set(name, index);
} catch (Exception e) {
// Don't do anything - safest fallback behaviour.
}
}
public static final class Reflection {
private static final Field initCopyField, iterableCopyField;
private static final Field astStackField, astPtrField;
private static final Constructor<Modifier> modifierConstructor;
private static final Constructor<MarkerAnnotation> markerAnnotationConstructor;
private static final Method astConverterRecordNodes;
static {
Field a = null, b = null, c = null, d = null;
Constructor<Modifier> f = null;
Constructor<MarkerAnnotation> g = null;
Method h = null;
try {
a = LocalDeclaration.class.getDeclaredField("$initCopy");
b = LocalDeclaration.class.getDeclaredField("$iterableCopy");
} catch (Throwable t) {
//ignore - no $initCopy exists when running in ecj.
}
try {
c = Parser.class.getDeclaredField("astStack");
c.setAccessible(true);
d = Parser.class.getDeclaredField("astPtr");
d.setAccessible(true);
f = Modifier.class.getDeclaredConstructor(AST.class);
f.setAccessible(true);
g = MarkerAnnotation.class.getDeclaredConstructor(AST.class);
g.setAccessible(true);
Class<?> z = Class.forName("org.eclipse.jdt.core.dom.ASTConverter");
h = z.getDeclaredMethod("recordNodes", org.eclipse.jdt.core.dom.ASTNode.class, org.eclipse.jdt.internal.compiler.ast.ASTNode.class);
h.setAccessible(true);
} catch (Throwable t) {
// Most likely we're in ecj or some other plugin usage of the eclipse compiler. No need for this.
}
initCopyField = a;
iterableCopyField = b;
astStackField = c;
astPtrField = d;
modifierConstructor = f;
markerAnnotationConstructor = g;
astConverterRecordNodes = h;
}
}
}