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// ASM: a very small and fast Java bytecode manipulation framework
// Copyright (c) 2000-2011 INRIA, France Telecom
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// 3. Neither the name of the copyright holders nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
// THE POSSIBILITY OF SUCH DAMAGE.
package org.objectweb.asm.tree;
import java.util.List;
import org.objectweb.asm.MethodVisitor;
/**
* A node that represents a try catch block.
*
* @author Eric Bruneton
*/
public class TryCatchBlockNode {
/** The beginning of the exception handler's scope (inclusive). */
public LabelNode start;
/** The end of the exception handler's scope (exclusive). */
public LabelNode end;
/** The beginning of the exception handler's code. */
public LabelNode handler;
/**
* The internal name of the type of exceptions handled by the handler. May be {@literal null} to
* catch any exceptions (for "finally" blocks).
*/
public String type;
/** The runtime visible type annotations on the exception handler type. May be {@literal null}. */
public List visibleTypeAnnotations;
/**
* The runtime invisible type annotations on the exception handler type. May be {@literal null}.
*/
public List invisibleTypeAnnotations;
/**
* Constructs a new {@link TryCatchBlockNode}.
*
* @param start the beginning of the exception handler's scope (inclusive).
* @param end the end of the exception handler's scope (exclusive).
* @param handler the beginning of the exception handler's code.
* @param type the internal name of the type of exceptions handled by the handler, or {@literal
* null} to catch any exceptions (for "finally" blocks).
*/
public TryCatchBlockNode(
final LabelNode start, final LabelNode end, final LabelNode handler, final String type) {
this.start = start;
this.end = end;
this.handler = handler;
this.type = type;
}
/**
* Updates the index of this try catch block in the method's list of try catch block nodes. This
* index maybe stored in the 'target' field of the type annotations of this block.
*
* @param index the new index of this try catch block in the method's list of try catch block
* nodes.
*/
public void updateIndex(final int index) {
int newTypeRef = 0x42000000 | (index << 8);
if (visibleTypeAnnotations != null) {
for (int i = 0, n = visibleTypeAnnotations.size(); i < n; ++i) {
visibleTypeAnnotations.get(i).typeRef = newTypeRef;
}
}
if (invisibleTypeAnnotations != null) {
for (int i = 0, n = invisibleTypeAnnotations.size(); i < n; ++i) {
invisibleTypeAnnotations.get(i).typeRef = newTypeRef;
}
}
}
/**
* Makes the given visitor visit this try catch block.
*
* @param methodVisitor a method visitor.
*/
public void accept(final MethodVisitor methodVisitor) {
methodVisitor.visitTryCatchBlock(
start.getLabel(), end.getLabel(), handler == null ? null : handler.getLabel(), type);
if (visibleTypeAnnotations != null) {
for (int i = 0, n = visibleTypeAnnotations.size(); i < n; ++i) {
TypeAnnotationNode typeAnnotation = visibleTypeAnnotations.get(i);
typeAnnotation.accept(
methodVisitor.visitTryCatchAnnotation(
typeAnnotation.typeRef, typeAnnotation.typePath, typeAnnotation.desc, true));
}
}
if (invisibleTypeAnnotations != null) {
for (int i = 0, n = invisibleTypeAnnotations.size(); i < n; ++i) {
TypeAnnotationNode typeAnnotation = invisibleTypeAnnotations.get(i);
typeAnnotation.accept(
methodVisitor.visitTryCatchAnnotation(
typeAnnotation.typeRef, typeAnnotation.typePath, typeAnnotation.desc, false));
}
}
}
}
