/*
* Copyright (C) 2011 Stephane Godbillon
*
* This file is part of BytecodeParser. See the README file in the root
* directory of this project.
*
* BytecodeParser is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
* BytecodeParser 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 Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public License
* along with BytecodeParser. If not, see <http://www.gnu.org/licenses/>.
*/
package bytecodeparser.analysis.opcodes;
import bytecodeparser.Context;
import bytecodeparser.analysis.decoders.DecodedLocalVariableOp;
import bytecodeparser.analysis.decoders.DecodedWideOp;
import javassist.bytecode.Opcode;
/**
* Wide opcode for localvariables (if there is more than 256 local vars in the method's body).
* @author Stephane Godbillon
*
*/
public class WideOpcode extends Op {
private final DecodedWideOp decodedWideOp;
public WideOpcode() {
this(null);
}
private WideOpcode(DecodedWideOp decodedWideOp) {
super(Opcode.WIDE);
this.decodedWideOp = decodedWideOp;
}
@Override
public Op init(Context context, int index) {
return new WideOpcode(new DecodedWideOp(this, context, index));
}
@Override
public DecodedWideOp decode(Context context, int index) {
if(decodedWideOp != null)
return decodedWideOp;
throw new RuntimeException("must be initialized before !");
}
/**
* Gets the wrapped localVariable opcode.
* This op MUST be decoded before invoking this method.
* @return the wrapped localVariable op.
* @throws RuntimeException if this op has not been initialized with init(context, index) before.
*/
public LocalVariableOpcode getWrappedLocalVariableOpcode() {
if(decodedWideOp != null)
return decodedWideOp.op.as(LocalVariableOpcode.class);
throw new RuntimeException("must be initialized before !");
}
/**
* Gets the wrapped decoded localVariable opcode.
* This op MUST be decoded before invoking this method.
* @return the wrapped decoded localVariable op.
* @throws RuntimeException if this op has not been initialized with init(context, index) before.
*/
public DecodedLocalVariableOp getWrappedDecodedLocalVariableOp() {
if(decodedWideOp != null)
return decodedWideOp.wrappedDecodedLocalVariableOp;
throw new RuntimeException("must be initialized before !");
}
}