| 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. |
| * |
| * @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>">" |
| * |
| * @param verbose long/short format switch |
| * @return mnemonic for instruction |
| */ |
| @Override |
| public String toString(boolean verbose) { |
| return super.toString(verbose) + " " + index; |
| } |
| |
| /** |
| * @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; |
| } |
| |
| /** |
| * @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; |
| } |
| |
| } |