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202 lines
7.4 KiB
202 lines
7.4 KiB
package com.fr.third.aspectj.apache.bcel.generic; |
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/* ==================================================================== |
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* The Apache Software License, Version 1.1 |
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* |
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* Copyright (c) 2001 The Apache Software Foundation. All rights |
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* reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. The end-user documentation included with the redistribution, |
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* if any, must include the following acknowledgment: |
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* "This product includes software developed by the |
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* Apache Software Foundation (http://www.apache.org/)." |
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* Alternately, this acknowledgment may appear in the software itself, |
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* if and wherever such third-party acknowledgments normally appear. |
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* |
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* 4. The names "Apache" and "Apache Software Foundation" and |
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* "Apache BCEL" must not be used to endorse or promote products |
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* derived from this software without prior written permission. For |
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* written permission, please contact apache@apache.org. |
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* |
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* 5. Products derived from this software may not be called "Apache", |
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* "Apache BCEL", nor may "Apache" appear in their name, without |
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* prior written permission of the Apache Software Foundation. |
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* |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This software consists of voluntary contributions made by many |
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* individuals on behalf of the Apache Software Foundation. For more |
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* information on the Apache Software Foundation, please see |
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* <http://www.apache.org/>. |
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*/ |
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import com.fr.third.aspectj.apache.bcel.classfile.CodeException; |
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import com.fr.third.aspectj.apache.bcel.classfile.ConstantPool; |
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/** |
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* This class represents an exception handler, i.e., specifies the region where |
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* a handler is active and an instruction where the actual handling is done. |
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* pool as parameters. Opposed to the JVM specification the end of the handled |
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* region is set to be inclusive, i.e. all instructions between start and end |
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* are protected including the start and end instructions (handles) themselves. |
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* The end of the region is automatically mapped to be exclusive when calling |
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* getCodeException(), i.e., there is no difference semantically. |
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* |
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* @version $Id: CodeExceptionGen.java,v 1.5 2008/05/28 23:52:56 aclement Exp $ |
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* @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> |
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* @see MethodGen |
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* @see CodeException |
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* @see InstructionHandle |
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*/ |
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public final class CodeExceptionGen |
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implements InstructionTargeter, Cloneable, java.io.Serializable { |
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private InstructionHandle start_pc; |
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private InstructionHandle end_pc; |
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private InstructionHandle handler_pc; |
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private ObjectType catch_type; |
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/** |
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* Add an exception handler, i.e., specify region where a handler is active and an |
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* instruction where the actual handling is done. |
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* |
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* @param start_pc Start of handled region (inclusive) |
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* @param end_pc End of handled region (inclusive) |
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* @param handler_pc Where handling is done |
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* @param catch_type which exception is handled, null for ANY |
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*/ |
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public CodeExceptionGen(InstructionHandle start_pc, InstructionHandle end_pc, |
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InstructionHandle handler_pc, ObjectType catch_type) { |
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setStartPC(start_pc); |
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setEndPC(end_pc); |
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setHandlerPC(handler_pc); |
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this.catch_type = catch_type; |
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} |
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/** |
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* Get CodeException object.<BR> |
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* |
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* This relies on that the instruction list has already been dumped |
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* to byte code or or that the `setPositions' methods has been |
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* called for the instruction list. |
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* |
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* @param cp constant pool |
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*/ |
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public CodeException getCodeException(ConstantPool cp) { |
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return new CodeException(start_pc.getPosition(), |
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end_pc.getPosition() + end_pc.getInstruction().getLength(), |
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handler_pc.getPosition(), |
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(catch_type == null)? 0 : cp.addClass(catch_type)); |
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} |
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/* Set start of handler |
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* @param start_pc Start of handled region (inclusive) |
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*/ |
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public void setStartPC(InstructionHandle start_pc) { |
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InstructionBranch.notifyTarget(this.start_pc, start_pc, this); |
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this.start_pc = start_pc; |
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} |
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/* Set end of handler |
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* @param end_pc End of handled region (inclusive) |
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*/ |
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public void setEndPC(InstructionHandle end_pc) { |
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InstructionBranch.notifyTarget(this.end_pc, end_pc, this); |
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this.end_pc = end_pc; |
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} |
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/* Set handler code |
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* @param handler_pc Start of handler |
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*/ |
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public void setHandlerPC(InstructionHandle handler_pc) { |
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InstructionBranch.notifyTarget(this.handler_pc, handler_pc, this); |
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this.handler_pc = handler_pc; |
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} |
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/** |
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* @param old_ih old target, either start or end |
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* @param new_ih new target |
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*/ |
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public void updateTarget(InstructionHandle old_ih, InstructionHandle new_ih) { |
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boolean targeted = false; |
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if(start_pc == old_ih) { |
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targeted = true; |
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setStartPC(new_ih); |
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} |
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if(end_pc == old_ih) { |
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targeted = true; |
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setEndPC(new_ih); |
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} |
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if(handler_pc == old_ih) { |
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targeted = true; |
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setHandlerPC(new_ih); |
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} |
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if(!targeted) |
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throw new ClassGenException("Not targeting " + old_ih + ", but {" + start_pc + ", " + |
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end_pc + ", " + handler_pc + "}"); |
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} |
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/** |
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* @return true, if ih is target of this handler |
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*/ |
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public boolean containsTarget(InstructionHandle ih) { |
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return (start_pc == ih) || (end_pc == ih) || (handler_pc == ih); |
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} |
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/** Sets the type of the Exception to catch. Set 'null' for ANY. */ |
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public void setCatchType(ObjectType catch_type) { this.catch_type = catch_type; } |
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/** Gets the type of the Exception to catch, 'null' for ANY. */ |
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public ObjectType getCatchType() { return catch_type; } |
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/** @return start of handled region (inclusive) |
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*/ |
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public InstructionHandle getStartPC() { return start_pc; } |
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/** @return end of handled region (inclusive) |
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*/ |
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public InstructionHandle getEndPC() { return end_pc; } |
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/** @return start of handler |
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*/ |
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public InstructionHandle getHandlerPC() { return handler_pc; } |
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public String toString() { |
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return "CodeExceptionGen(" + start_pc + ", " + end_pc + ", " + handler_pc + ")"; |
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} |
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public Object clone() { |
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try { |
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return super.clone(); |
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} catch(CloneNotSupportedException e) { |
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System.err.println(e); |
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return null; |
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} |
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} |
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}
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