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package org.aspectj.apache.bcel.classfile;
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2001 The Apache Software Foundation. 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. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" and
* "Apache BCEL" must not be used to endorse or promote products
* derived from this software without prior written permission. For
* written permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* "Apache BCEL", nor may "Apache" appear in their name, without
* prior written permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR
* ITS 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
import org.aspectj.apache.bcel.Constants;
import java.io.*;
/**
* This class represents an entry in the exception table of the <em>Code</em>
* attribute and is used only there. It contains a range in which a
* particular exception handler is active.
*
* @version $Id: CodeException.java,v 1.1 2004/11/18 14:48:11 aclement Exp $
* @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
* @see Code
*/
public final class CodeException
implements Cloneable, Constants, Node, Serializable
{
private int start_pc; // Range in the code the exception handler is
private int end_pc; // active. start_pc is inclusive, end_pc exclusive
private int handler_pc; /* Starting address of exception handler, i.e.,
* an offset from start of code.
*/
private int catch_type; /* If this is zero the handler catches any
* exception, otherwise it points to the
* exception class which is to be caught.
*/
/**
* Initialize from another object.
*/
public CodeException(CodeException c) {
this(c.getStartPC(), c.getEndPC(), c.getHandlerPC(), c.getCatchType());
}
/**
* Construct object from file stream.
* @param file Input stream
* @throws IOException
*/
CodeException(DataInputStream file) throws IOException
{
this(file.readUnsignedShort(), file.readUnsignedShort(),
file.readUnsignedShort(), file.readUnsignedShort());
}
/**
* @param start_pc Range in the code the exception handler is active,
* start_pc is inclusive while
* @param end_pc is exclusive
* @param handler_pc Starting address of exception handler, i.e.,
* an offset from start of code.
* @param catch_type If zero the handler catches any
* exception, otherwise it points to the exception class which is
* to be caught.
*/
public CodeException(int start_pc, int end_pc, int handler_pc,
int catch_type)
{
this.start_pc = start_pc;
this.end_pc = end_pc;
this.handler_pc = handler_pc;
this.catch_type = catch_type;
}
/**
* Called by objects that are traversing the nodes of the tree implicitely
* defined by the contents of a Java class. I.e., the hierarchy of methods,
* fields, attributes, etc. spawns a tree of objects.
*
* @param v Visitor object
*/
public void accept(Visitor v) {
v.visitCodeException(this);
}
/**
* Dump code exception to file stream in binary format.
*
* @param file Output file stream
* @throws IOException
*/
public final void dump(DataOutputStream file) throws IOException
{
file.writeShort(start_pc);
file.writeShort(end_pc);
file.writeShort(handler_pc);
file.writeShort(catch_type);
}
/**
* @return 0, if the handler catches any exception, otherwise it points to
* the exception class which is to be caught.
*/
public final int getCatchType() { return catch_type; }
/**
* @return Exclusive end index of the region where the handler is active.
*/
public final int getEndPC() { return end_pc; }
/**
* @return Starting address of exception handler, relative to the code.
*/
public final int getHandlerPC() { return handler_pc; }
/**
* @return Inclusive start index of the region where the handler is active.
*/
public final int getStartPC() { return start_pc; }
/**
* @param catch_type.
*/
public final void setCatchType(int catch_type) {
this.catch_type = catch_type;
}
/**
* @param end_pc end of handled block
*/
public final void setEndPC(int end_pc) {
this.end_pc = end_pc;
}
/**
* @param handler_pc where the actual code is
*/
public final void setHandlerPC(int handler_pc) {
this.handler_pc = handler_pc;
}
/**
* @param start_pc start of handled block
*/
public final void setStartPC(int start_pc) {
this.start_pc = start_pc;
}
/**
* @return String representation.
*/
public final String toString() {
return "CodeException(start_pc = " + start_pc +
", end_pc = " + end_pc +
", handler_pc = " + handler_pc + ", catch_type = " + catch_type + ")";
}
/**
* @return String representation.
*/
public final String toString(ConstantPool cp, boolean verbose) {
String str;
if(catch_type == 0)
str = "<Any exception>(0)";
else
str = Utility.compactClassName(cp.getConstantString(catch_type, CONSTANT_Class), false) +
(verbose? "(" + catch_type + ")" : "");
return start_pc + "\t" + end_pc + "\t" + handler_pc + "\t" + str;
}
public final String toString(ConstantPool cp) {
return toString(cp, true);
}
/**
* @return deep copy of this object
*/
public CodeException copy() {
try {
return (CodeException)clone();
} catch(CloneNotSupportedException e) {}
return null;
}
}
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