/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source 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.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
* Free SoftwareFoundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.bytecode;
import com.caucho.vfs.TempBuffer;
import com.caucho.vfs.TempStream;
import com.caucho.vfs.WriteStream;
import java.io.IOException;
import java.util.ArrayList;
/**
* Represents a generic attribute
*/
public class ExceptionsAttribute extends Attribute {
private ArrayList<String> _exceptions = new ArrayList<String>();
ExceptionsAttribute(String name)
{
super(name);
}
/**
* Adds an exception
*/
public void addException(String exn)
{
_exceptions.add(exn);
}
/**
* Returns the exceptions.
*/
public ArrayList<String> getExceptionList()
{
return _exceptions;
}
/**
* Writes the field to the output.
*/
public void read(ByteCodeParser in)
throws IOException
{
int length = in.readInt();
int exnCount = in.readShort();
for (int i = 0; i < exnCount; i++) {
int index = in.readShort();
if (index == 0)
_exceptions.add(null);
_exceptions.add(in.getConstantPool().getClass(index).getName());
}
}
/**
* Writes the field to the output.
*/
public void write(ByteCodeWriter out)
throws IOException
{
out.writeUTF8Const(getName());
TempStream ts = new TempStream();
ts.openWrite();
WriteStream ws = new WriteStream(ts);
ByteCodeWriter o2 = new ByteCodeWriter(ws, out.getJavaClass());
o2.writeShort(_exceptions.size());
for (int i = 0; i < _exceptions.size(); i++) {
String exn = _exceptions.get(i);
o2.writeClass(exn);
}
ws.close();
out.writeInt(ts.getLength());
TempBuffer ptr = ts.getHead();
for (; ptr != null; ptr = ptr.getNext())
out.write(ptr.getBuffer(), 0, ptr.getLength());
ts.destroy();
}
/**
* Clones the attribute
*/
public Attribute export(JavaClass cl, JavaClass target)
{
ConstantPool cp = target.getConstantPool();
cp.addUTF8(getName());
ExceptionsAttribute attr = new ExceptionsAttribute(getName());
for (int i = 0; i < _exceptions.size(); i++) {
String exn = _exceptions.get(i);
cp.addClass(exn);
attr.addException(exn);
}
return attr;
}
public String toString()
{
return "ExceptionsAttribute[" + getName() + "]";
}
}