/**
* @(#) NewArrayEvaluator.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.ArrayInstantiationExpression;
import org.jreversepro.ast.expression.Expression;
import org.jreversepro.jvm.TypeInferrer;
import org.jreversepro.reflect.instruction.Instruction;
/**
* @author akkumar
*
*/
public class NewArrayEvaluator extends AbstractInstructionEvaluator {
/**
* @param context
*/
public NewArrayEvaluator(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) {
ArrayInstantiationExpression expr = null;
switch (ins.opcode) {
case OPCODE_NEWARRAY: {
int atype = ins.getArgByte();
Expression arraySize = evalMachine.pop();
char jvmtype = JVM_TYPE_UNDEFINED;
switch (atype) {
case 4:
jvmtype = JVM_TYPE_BOOLEAN;
break;
case 5:
jvmtype = JVM_TYPE_CHAR;
break;
case 6:
jvmtype = JVM_TYPE_FLOAT;
break;
case 7:
jvmtype = JVM_TYPE_DOUBLE;
break;
case 8:
jvmtype = JVM_TYPE_BYTE;
break;
case 9:
jvmtype = JVM_TYPE_SHORT;
break;
case 10:
jvmtype = JVM_TYPE_INT;
break;
case 11:
jvmtype = JVM_TYPE_LONG;
break;
default:
throw new UnsupportedOperationException("Type " + atype
+ " not supported as argument of opcode OPCODE_NEWARRAY");
}
expr = new ArrayInstantiationExpression(jvmtype, arraySize);
break;
}
case OPCODE_ANEWARRAY: {
int offset = ins.getArgUnsignedShort();
String classType = pool.getClassName(offset);
Expression arraySize1 = evalMachine.pop();
expr = new ArrayInstantiationExpression(classType, arraySize1);
break;
}
case OPCODE_MULTIANEWARRAY: {
int offset = ins.getArgUnsignedShort();
// Dimensions. Max 255.
int dimensions = ins.getArgUnsignedByte(2);
if (dimensions > 255) {
throw new IllegalArgumentException(
"OPCODE_MULTIANEWARRAY: Max. Number of dimensions is 255. Received "
+ dimensions);
}
Expression arrayIndices[] = new Expression[dimensions];
// ClassType
String classType = TypeInferrer.getJLSType(pool.getClassName(offset),
false);
// Get all array indices
for (int i = dimensions - 1; i >= 0; i--) {
arrayIndices[i] = evalMachine.pop();
}
expr = new ArrayInstantiationExpression(classType, Arrays
.asList(arrayIndices));
}
}
evalMachine.push(expr);
}
/*
* (non-Javadoc)
*
* @seenet.sf.jrevpro.decompile.evaluator.AbstractInstructionEvaluator#
* getProcessingOpcodes()
*/
@Override
Iterable<Integer> getProcessingOpcodes() {
return Arrays.asList(OPCODE_NEWARRAY, OPCODE_ANEWARRAY,
OPCODE_MULTIANEWARRAY);
}
}