/**
* @(#) NonStaticFieldAccessorEvaluator.java
*
* JReversePro - Java Decompiler / Disassembler.
* Copyright (C) 2008 Karthik Kumar.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
package org.jreversepro.ast.evaluator;
import java.util.Arrays;
import org.jreversepro.ast.expression.Assignment;
import org.jreversepro.ast.expression.Expression;
import org.jreversepro.ast.expression.FieldAccessExpression;
import org.jreversepro.ast.expression.InstanceFieldAccessExpression;
import org.jreversepro.ast.intermediate.CompleteLine;
import org.jreversepro.reflect.instruction.Instruction;
/**
* @author akkumar
*
*/
public class InstanceFieldReferenceEvaluator extends
AbstractInstructionEvaluator {
/**
* @param context
*/
public InstanceFieldReferenceEvaluator(EvaluatorContext context) {
super(context);
}
/*
* (non-Javadoc)
*
* @see
* net.sf.jrevpro.decompile.evaluator.AbstractInstructionEvaluator#evaluate
* (net.sf.jrevpro.reflect.instruction.Instruction)
*/
@Override
void evaluate(Instruction ins) {
switch (ins.opcode) {
case OPCODE_GETFIELD: {
Expression op1 = evalMachine.pop();
int offset = ins.getArgUnsignedShort();
int fieldPtr = pool.getPtr2(offset);
String fieldName = pool.getFieldName(fieldPtr);
String fieldType = pool.getFieldType(fieldPtr);
FieldAccessExpression expr = new InstanceFieldAccessExpression(op1, fieldName,
fieldType);
evalMachine.push(expr);
break;
}
case OPCODE_PUTFIELD: {
Expression rhs = evalMachine.pop();
Expression accessTarget = evalMachine.pop();
int offset = ins.getArgUnsignedShort();
int fieldPtr = pool.getPtr2(offset);
String fieldName = pool.getFieldName(fieldPtr);
String fieldType = pool.getFieldType(fieldPtr);
FieldAccessExpression expr = new InstanceFieldAccessExpression(accessTarget,
fieldName, fieldType);
Assignment assign = new Assignment(expr, rhs);
statements.append(new CompleteLine(ins, assign));
break;
}
}
}
/*
* (non-Javadoc)
*
* @seenet.sf.jrevpro.decompile.evaluator.AbstractInstructionEvaluator#
* getProcessingOpcodes()
*/
@Override
Iterable<Integer> getProcessingOpcodes() {
return Arrays.asList(OPCODE_GETFIELD, OPCODE_PUTFIELD);
}
}