package org.aspectj.apache.bcel.generic;
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2001 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" and
* "Apache BCEL" must not be used to endorse or promote products
* derived from this software without prior written permission. For
* written permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* "Apache BCEL", nor may "Apache" appear in their name, without
* prior written permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
import java.io.DataOutputStream;
import java.io.IOException;
import org.aspectj.apache.bcel.Constants;
import org.aspectj.apache.bcel.classfile.Constant;
import org.aspectj.apache.bcel.classfile.ConstantClass;
import org.aspectj.apache.bcel.classfile.ConstantDouble;
import org.aspectj.apache.bcel.classfile.ConstantFloat;
import org.aspectj.apache.bcel.classfile.ConstantInteger;
import org.aspectj.apache.bcel.classfile.ConstantLong;
import org.aspectj.apache.bcel.classfile.ConstantPool;
import org.aspectj.apache.bcel.classfile.ConstantString;
import org.aspectj.apache.bcel.classfile.ConstantUtf8;
Class for instructions that use an index into the constant pool such as LDC, INVOKEVIRTUAL, etc.
Author: M. Dahm Version: $Id: InstructionCP.java,v 1.6 2009/10/05 17:35:36 aclement Exp $
/**
* Class for instructions that use an index into the constant pool such as LDC, INVOKEVIRTUAL, etc.
*
* @version $Id: InstructionCP.java,v 1.6 2009/10/05 17:35:36 aclement Exp $
* @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
*/
public class InstructionCP extends Instruction {
protected int index;
public InstructionCP(short opcode, int index) {
super(opcode);
this.index = index;
}
@Override
public void dump(DataOutputStream out) throws IOException {
if (opcode == LDC_W && index < 256) {
out.writeByte(LDC);
out.writeByte(index);
} else {
out.writeByte(opcode);
if (Constants.iLen[opcode] == 2) {
if (index > 255) {
throw new IllegalStateException();
}
out.writeByte(index);
} else {
out.writeShort(index);
}
}
}
@Override
public int getLength() {
if (opcode == LDC_W && index < 256) {
return 2;
} else {
return super.getLength();
}
}
Long output format:
<name of opcode> "["<opcode number>"]" "("<length of instruction>")" "<"< constant pool
index>">"
Params: - verbose – long/short format switch
Returns: mnemonic for instruction
/**
* Long output format:
*
* <name of opcode> "["<opcode number>"]" "("<length of instruction>")" "<"< constant pool
* index>">"
*
* @param verbose long/short format switch
* @return mnemonic for instruction
*/
@Override
public String toString(boolean verbose) {
return super.toString(verbose) + " " + index;
}
Returns: mnemonic for instruction with symbolic references resolved
/**
* @return mnemonic for instruction with symbolic references resolved
*/
public String toString(ConstantPool cp) {
Constant c = cp.getConstant(index);
String str = cp.constantToString(c);
if (c instanceof ConstantClass) {
str = str.replace('.', '/');
}
return org.aspectj.apache.bcel.Constants.OPCODE_NAMES[opcode] + " " + str;
}
Returns: index in constant pool referred by this instruction.
/**
* @return index in constant pool referred by this instruction.
*/
@Override
public final int getIndex() {
return index;
}
@Override
public void setIndex(int index) {
this.index = index;
if (this.index > 255 && opcode == LDC) {
// promote it
opcode = LDC_W;
}
}
@Override
public Type getType(ConstantPool cpg) {
switch (cpg.getConstant(index).getTag()) {
case CONSTANT_String:
return Type.STRING;
case CONSTANT_Float:
return Type.FLOAT;
case CONSTANT_Integer:
return Type.INT;
case CONSTANT_Long:
return Type.LONG;
case CONSTANT_Double:
return Type.DOUBLE;
case CONSTANT_Class:
String name = cpg.getConstantString_CONSTANTClass(index);
// ConstantPool cp = cpg.getConstantPool();
// String name = cp.getConstantString(index, CONSTANT_Class);
if (!name.startsWith("[")) {
StringBuffer sb = new StringBuffer();
sb.append("L").append(name).append(";");
return Type.getType(sb.toString());
} else {
return Type.getType(name);
}
default:
throw new RuntimeException("Unknown or invalid constant type at " + index);
}
}
@Override
public Object getValue(ConstantPool constantPool) {
Constant constant = constantPool.getConstant(index);
switch (constant.getTag()) {
case Constants.CONSTANT_String:
int i = ((ConstantString) constant).getStringIndex();
constant = constantPool.getConstant(i);
return ((ConstantUtf8) constant).getValue();
case Constants.CONSTANT_Float:
return ((ConstantFloat) constant).getValue();
case Constants.CONSTANT_Integer:
return ((ConstantInteger) constant).getValue();
case Constants.CONSTANT_Long:
return ((ConstantLong) constant).getValue();
case Constants.CONSTANT_Double:
return ((ConstantDouble) constant).getValue();
default:
throw new RuntimeException("Unknown or invalid constant type at " + index);
}
}
public boolean equals(Object other) {
if (!(other instanceof InstructionCP)) {
return false;
}
InstructionCP o = (InstructionCP) other;
return o.opcode == opcode && o.index == index;
}
public int hashCode() {
return opcode * 37 + index;
}
}