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/*
* ProGuard -- shrinking, optimization, obfuscation, and preverification
* of Java bytecode.
*
* Copyright (c) 2002-2013 Eric Lafortune (eric@graphics.cornell.edu)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package proguard.classfile.editor;
import proguard.classfile.attribute.ExceptionsAttribute;
/**
* This class can add exceptions to a given exceptions attribute.
* Exceptions to be added must have been added to the constant pool and filled
* out beforehand.
*
* @author Eric Lafortune
*/
public class ExceptionsAttributeEditor
{
private ExceptionsAttribute targetExceptionsAttribute;
/**
* Creates a new ExceptionsAttributeEditor that will edit exceptions in the
* given exceptions attribute.
*/
public ExceptionsAttributeEditor(ExceptionsAttribute targetExceptionsAttribute)
{
this.targetExceptionsAttribute = targetExceptionsAttribute;
}
/**
* Adds a given exception to the exceptions attribute.
*/
public void addException(int exceptionIndex)
{
int exceptionIndexTableLength = targetExceptionsAttribute.u2exceptionIndexTableLength;
int[] exceptionIndexTable = targetExceptionsAttribute.u2exceptionIndexTable;
// Make sure there is enough space for the new exception.
if (exceptionIndexTable.length <= exceptionIndexTableLength)
{
targetExceptionsAttribute.u2exceptionIndexTable = new int[exceptionIndexTableLength+1];
System.arraycopy(exceptionIndexTable, 0,
targetExceptionsAttribute.u2exceptionIndexTable, 0,
exceptionIndexTableLength);
exceptionIndexTable = targetExceptionsAttribute.u2exceptionIndexTable;
}
// Add the exception.
exceptionIndexTable[targetExceptionsAttribute.u2exceptionIndexTableLength++] = exceptionIndex;
}
}
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