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/*
* Copyright © 2009-2011 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.handlers;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.List;
import lombok.SneakyThrows;
import lombok.core.AnnotationValues;
import lombok.eclipse.Eclipse;
import lombok.eclipse.EclipseAnnotationHandler;
import lombok.eclipse.EclipseNode;
import org.eclipse.jdt.internal.compiler.ast.ASTNode;
import org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration;
import org.eclipse.jdt.internal.compiler.ast.Annotation;
import org.eclipse.jdt.internal.compiler.ast.Argument;
import org.eclipse.jdt.internal.compiler.ast.ArrayInitializer;
import org.eclipse.jdt.internal.compiler.ast.Block;
import org.eclipse.jdt.internal.compiler.ast.Expression;
import org.eclipse.jdt.internal.compiler.ast.MemberValuePair;
import org.eclipse.jdt.internal.compiler.ast.MessageSend;
import org.eclipse.jdt.internal.compiler.ast.QualifiedNameReference;
import org.eclipse.jdt.internal.compiler.ast.QualifiedTypeReference;
import org.eclipse.jdt.internal.compiler.ast.SingleNameReference;
import org.eclipse.jdt.internal.compiler.ast.SingleTypeReference;
import org.eclipse.jdt.internal.compiler.ast.Statement;
import org.eclipse.jdt.internal.compiler.ast.ThrowStatement;
import org.eclipse.jdt.internal.compiler.ast.TryStatement;
import org.eclipse.jdt.internal.compiler.ast.TypeReference;
import org.mangosdk.spi.ProviderFor;
/**
* Handles the {@code lombok.HandleSneakyThrows} annotation for eclipse.
*/
@ProviderFor(EclipseAnnotationHandler.class)
public class HandleSneakyThrows extends EclipseAnnotationHandler<SneakyThrows> {
private static class DeclaredException {
final String exceptionName;
final ASTNode node;
DeclaredException(String exceptionName, ASTNode node) {
this.exceptionName = exceptionName;
this.node = node;
}
public long getPos() {
return (long)node.sourceStart << 32 | node.sourceEnd;
}
}
@Override public boolean deferUntilPostDiet() {
return true;
}
@Override public void handle(AnnotationValues<SneakyThrows> annotation, Annotation source, EclipseNode annotationNode) {
List<String> exceptionNames = annotation.getRawExpressions("value");
List<DeclaredException> exceptions = new ArrayList<DeclaredException>();
MemberValuePair[] memberValuePairs = source.memberValuePairs();
if (memberValuePairs == null || memberValuePairs.length == 0) {
exceptions.add(new DeclaredException("java.lang.Throwable", source));
} else {
Expression arrayOrSingle = memberValuePairs[0].value;
final Expression[] exceptionNameNodes;
if (arrayOrSingle instanceof ArrayInitializer) {
exceptionNameNodes = ((ArrayInitializer)arrayOrSingle).expressions;
} else exceptionNameNodes = new Expression[] { arrayOrSingle };
if (exceptionNames.size() != exceptionNameNodes.length) {
annotationNode.addError(
"LOMBOK BUG: The number of exception classes in the annotation isn't the same pre- and post- guessing.");
}
int idx = 0;
for (String exceptionName : exceptionNames) {
if (exceptionName.endsWith(".class")) exceptionName = exceptionName.substring(0, exceptionName.length() - 6);
exceptions.add(new DeclaredException(exceptionName, exceptionNameNodes[idx++]));
}
}
EclipseNode owner = annotationNode.up();
switch (owner.getKind()) {
// case FIELD:
// return handleField(annotationNode, (FieldDeclaration)owner.get(), exceptions);
case METHOD:
handleMethod(annotationNode, (AbstractMethodDeclaration)owner.get(), exceptions);
break;
default:
annotationNode.addError("@SneakyThrows is legal only on methods and constructors.");
}
}
// private boolean handleField(Node annotation, FieldDeclaration field, List<DeclaredException> exceptions) {
// if (field.initialization == null) {
// annotation.addError("@SneakyThrows can only be used on fields with an initialization statement.");
// return true;
// }
//
// Expression expression = field.initialization;
// Statement[] content = new Statement[] {new Assignment(
// new SingleNameReference(field.name, 0), expression, 0)};
// field.initialization = null;
//
// for (DeclaredException exception : exceptions) {
// content = new Statement[] { buildTryCatchBlock(content, exception) };
// }
//
// Block block = new Block(0);
// block.statements = content;
//
// Node typeNode = annotation.up().up();
//
// Initializer initializer = new Initializer(block, field.modifiers & Modifier.STATIC);
// initializer.sourceStart = expression.sourceStart;
// initializer.sourceEnd = expression.sourceEnd;
// initializer.declarationSourceStart = expression.sourceStart;
// initializer.declarationSourceEnd = expression.sourceEnd;
// injectField(typeNode, initializer);
//
// typeNode.rebuild();
//
// return true;
// }
private void handleMethod(EclipseNode annotation, AbstractMethodDeclaration method, List<DeclaredException> exceptions) {
if (method.isAbstract()) {
annotation.addError("@SneakyThrows can only be used on concrete methods.");
return;
}
if (method.statements == null) return;
Statement[] contents = method.statements;
for (DeclaredException exception : exceptions) {
contents = new Statement[] { buildTryCatchBlock(contents, exception, exception.node) };
}
method.statements = contents;
annotation.up().rebuild();
}
private Statement buildTryCatchBlock(Statement[] contents, DeclaredException exception, ASTNode source) {
long p = exception.getPos();
int pS = (int)(p >> 32), pE = (int)p;
TryStatement tryStatement = new TryStatement();
Eclipse.setGeneratedBy(tryStatement, source);
tryStatement.tryBlock = new Block(0);
tryStatement.tryBlock.sourceStart = pS; tryStatement.tryBlock.sourceEnd = pE;
Eclipse.setGeneratedBy(tryStatement.tryBlock, source);
tryStatement.tryBlock.statements = contents;
TypeReference typeReference;
if (exception.exceptionName.indexOf('.') == -1) {
typeReference = new SingleTypeReference(exception.exceptionName.toCharArray(), p);
typeReference.statementEnd = pE;
} else {
String[] x = exception.exceptionName.split("\\.");
char[][] elems = new char[x.length][];
long[] poss = new long[x.length];
int start = pS;
for (int i = 0; i < x.length; i++) {
elems[i] = x[i].trim().toCharArray();
int end = start + x[i].length();
poss[i] = (long)start << 32 | end;
start = end + 1;
}
typeReference = new QualifiedTypeReference(elems, poss);
}
Eclipse.setGeneratedBy(typeReference, source);
Argument catchArg = new Argument("$ex".toCharArray(), p, typeReference, Modifier.FINAL);
Eclipse.setGeneratedBy(catchArg, source);
catchArg.declarationSourceEnd = catchArg.declarationEnd = catchArg.sourceEnd = pE;
catchArg.declarationSourceStart = catchArg.modifiersSourceStart = catchArg.sourceStart = pS;
tryStatement.catchArguments = new Argument[] { catchArg };
MessageSend sneakyThrowStatement = new MessageSend();
Eclipse.setGeneratedBy(sneakyThrowStatement, source);
sneakyThrowStatement.receiver = new QualifiedNameReference(new char[][] { "lombok".toCharArray(), "Lombok".toCharArray() }, new long[] { p, p }, pS, pE);
Eclipse.setGeneratedBy(sneakyThrowStatement.receiver, source);
sneakyThrowStatement.receiver.statementEnd = pE;
sneakyThrowStatement.selector = "sneakyThrow".toCharArray();
SingleNameReference exRef = new SingleNameReference("$ex".toCharArray(), p);
Eclipse.setGeneratedBy(exRef, source);
exRef.statementEnd = pE;
sneakyThrowStatement.arguments = new Expression[] { exRef };
sneakyThrowStatement.nameSourcePosition = p;
sneakyThrowStatement.sourceStart = pS;
sneakyThrowStatement.sourceEnd = sneakyThrowStatement.statementEnd = pE;
Statement rethrowStatement = new ThrowStatement(sneakyThrowStatement, pS, pE);
Eclipse.setGeneratedBy(rethrowStatement, source);
Block block = new Block(0);
block.sourceStart = pS;
block.sourceEnd = pE;
Eclipse.setGeneratedBy(block, source);
block.statements = new Statement[] { rethrowStatement };
tryStatement.catchBlocks = new Block[] { block };
tryStatement.sourceStart = pS;
tryStatement.sourceEnd = pE;
return tryStatement;
}
}
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