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/*
* Javassist, a Java-bytecode translator toolkit.
* Copyright (C) 1999-2006 Shigeru Chiba. All Rights Reserved.
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. Alternatively, the contents of this file may be used under
* the terms of the GNU Lesser General Public License Version 2.1 or later.
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*/
package javassist.convert;
import javassist.CtClass;
import javassist.NotFoundException;
import javassist.CodeConverter.ArrayAccessReplacementMethodNames;
import javassist.bytecode.BadBytecode;
import javassist.bytecode.CodeIterator;
import javassist.bytecode.ConstPool;
/**
*
* @author <a href="kabir.khan@jboss.com">Kabir Khan</a>
* @version $Revision: 1.3 $
*/
public class TransformAccessArrayField extends Transformer {
// CtClass componentType;
String methodClassname;
ArrayAccessReplacementMethodNames names;
public TransformAccessArrayField(Transformer next, String methodClassname,
ArrayAccessReplacementMethodNames names)
throws NotFoundException
{
super(next);
this.methodClassname = methodClassname;
this.names = names;
}
public int transform(CtClass tclazz, int pos, CodeIterator iterator,
ConstPool cp) throws BadBytecode
{
int c = iterator.byteAt(pos);
if (c == AALOAD || c == BALOAD || c == CALOAD || c == DALOAD
|| c == FALOAD || c == IALOAD || c == LALOAD || c == SALOAD)
replace(cp, iterator, pos, c, getLoadReplacementSignature(c));
else if (c == AASTORE || c == BASTORE || c == CASTORE || c == DASTORE
|| c == FASTORE || c == IASTORE || c == LASTORE || c == SASTORE)
replace(cp, iterator, pos, c, getStoreReplacementSignature(c));
return pos;
}
private void replace(ConstPool cp, CodeIterator iterator,
int pos, int opcode, String signature)
throws BadBytecode
{
String methodName = getMethodName(opcode);
if (methodName != null) {
iterator.insertGap(2);
int mi = cp.addClassInfo(methodClassname);
int methodref = cp.addMethodrefInfo(mi, methodName, signature);
iterator.writeByte(INVOKESTATIC, pos);
iterator.write16bit(methodref, pos + 1);
}
}
private String getMethodName(int opcode) {
String methodName = null;
switch (opcode) {
case AALOAD:
methodName = names.objectRead();
break;
case BALOAD:
methodName = names.byteOrBooleanRead();
break;
case CALOAD:
methodName = names.charRead();
break;
case DALOAD:
methodName = names.doubleRead();
break;
case FALOAD:
methodName = names.floatRead();
break;
case IALOAD:
methodName = names.intRead();
break;
case SALOAD:
methodName = names.shortRead();
break;
case LALOAD:
methodName = names.longRead();
break;
case AASTORE:
methodName = names.objectWrite();
break;
case BASTORE:
methodName = names.byteOrBooleanWrite();
break;
case CASTORE:
methodName = names.charWrite();
break;
case DASTORE:
methodName = names.doubleWrite();
break;
case FASTORE:
methodName = names.floatWrite();
break;
case IASTORE:
methodName = names.intWrite();
break;
case SASTORE:
methodName = names.shortWrite();
break;
case LASTORE:
methodName = names.longWrite();
break;
}
if (methodName.equals(""))
methodName = null;
return methodName;
}
private String getLoadReplacementSignature(int opcode)
throws BadBytecode
{
switch (opcode) {
case AALOAD:
return "(Ljava/lang/Object;I)Ljava/lang/Object;";
case BALOAD:
return "(Ljava/lang/Object;I)B";
case CALOAD:
return "(Ljava/lang/Object;I)C";
case DALOAD:
return "(Ljava/lang/Object;I)D";
case FALOAD:
return "(Ljava/lang/Object;I)F";
case IALOAD:
return "(Ljava/lang/Object;I)I";
case SALOAD:
return "(Ljava/lang/Object;I)S";
case LALOAD:
return "(Ljava/lang/Object;I)J";
}
throw new BadBytecode(opcode);
}
private String getStoreReplacementSignature(int opcode)
throws BadBytecode
{
switch (opcode) {
case AASTORE:
return "(Ljava/lang/Object;ILjava/lang/Object;)V";
case BASTORE:
return "(Ljava/lang/Object;IB)V";
case CASTORE:
return "(Ljava/lang/Object;IC)V";
case DASTORE:
return "(Ljava/lang/Object;ID)V";
case FASTORE:
return "(Ljava/lang/Object;IF)V";
case IASTORE:
return "(Ljava/lang/Object;II)V";
case SASTORE:
return "(Ljava/lang/Object;IS)V";
case LASTORE:
return "(Ljava/lang/Object;IJ)V";
}
throw new BadBytecode(opcode);
}
}
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