Item.java revision 325
325N/A/*
325N/A * Copyright (c) 2005, 2009, Oracle and/or its affiliates. All rights reserved.
325N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
325N/A *
325N/A * This code is free software; you can redistribute it and/or modify it
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325N/A * published by the Free Software Foundation. Oracle designates this
325N/A * particular file as subject to the "Classpath" exception as provided
325N/A * by Oracle in the LICENSE file that accompanied this code.
325N/A *
325N/A * This code is distributed in the hope that it will be useful, but WITHOUT
325N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
325N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
325N/A * version 2 for more details (a copy is included in the LICENSE file that
325N/A * accompanied this code).
325N/A *
325N/A * You should have received a copy of the GNU General Public License version
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325N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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325N/A */
325N/A
325N/A/*
325N/A * This file is available under and governed by the GNU General Public
325N/A * License version 2 only, as published by the Free Software Foundation.
325N/A * However, the following notice accompanied the original version of this
325N/A * file:
325N/A *
325N/A * ASM: a very small and fast Java bytecode manipulation framework
325N/A * Copyright (c) 2000-2007 INRIA, France Telecom
325N/A * All rights reserved.
325N/A *
325N/A * Redistribution and use in source and binary forms, with or without
325N/A * modification, are permitted provided that the following conditions
325N/A * are met:
325N/A * 1. Redistributions of source code must retain the above copyright
325N/A * notice, this list of conditions and the following disclaimer.
325N/A * 2. Redistributions in binary form must reproduce the above copyright
325N/A * notice, this list of conditions and the following disclaimer in the
325N/A * documentation and/or other materials provided with the distribution.
325N/A * 3. Neither the name of the copyright holders nor the names of its
325N/A * contributors may be used to endorse or promote products derived from
325N/A * this software without specific prior written permission.
325N/A *
325N/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
325N/A * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
325N/A * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
325N/A * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
325N/A * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
325N/A * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
325N/A * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
325N/A * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
325N/A * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
325N/A * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
325N/A * THE POSSIBILITY OF SUCH DAMAGE.
325N/A */
325N/Apackage com.sun.xml.internal.ws.org.objectweb.asm;
325N/A
325N/A/**
325N/A * A constant pool item. Constant pool items can be created with the 'newXXX'
325N/A * methods in the {@link ClassWriter} class.
325N/A *
325N/A * @author Eric Bruneton
325N/A */
325N/Afinal class Item {
325N/A
325N/A /**
325N/A * Index of this item in the constant pool.
325N/A */
325N/A int index;
325N/A
325N/A /**
325N/A * Type of this constant pool item. A single class is used to represent all
325N/A * constant pool item types, in order to minimize the bytecode size of this
325N/A * package. The value of this field is one of {@link ClassWriter#INT},
325N/A * {@link ClassWriter#LONG}, {@link ClassWriter#FLOAT},
325N/A * {@link ClassWriter#DOUBLE}, {@link ClassWriter#UTF8},
325N/A * {@link ClassWriter#STR}, {@link ClassWriter#CLASS},
325N/A * {@link ClassWriter#NAME_TYPE}, {@link ClassWriter#FIELD},
325N/A * {@link ClassWriter#METH}, {@link ClassWriter#IMETH}.
325N/A *
325N/A * Special Item types are used for Items that are stored in the ClassWriter
325N/A * {@link ClassWriter#typeTable}, instead of the constant pool, in order to
325N/A * avoid clashes with normal constant pool items in the ClassWriter constant
325N/A * pool's hash table. These special item types are
325N/A * {@link ClassWriter#TYPE_NORMAL}, {@link ClassWriter#TYPE_UNINIT} and
325N/A * {@link ClassWriter#TYPE_MERGED}.
325N/A */
325N/A int type;
325N/A
325N/A /**
325N/A * Value of this item, for an integer item.
325N/A */
325N/A int intVal;
325N/A
325N/A /**
325N/A * Value of this item, for a long item.
325N/A */
325N/A long longVal;
325N/A
325N/A /**
325N/A * First part of the value of this item, for items that do not hold a
325N/A * primitive value.
325N/A */
String strVal1;
/**
* Second part of the value of this item, for items that do not hold a
* primitive value.
*/
String strVal2;
/**
* Third part of the value of this item, for items that do not hold a
* primitive value.
*/
String strVal3;
/**
* The hash code value of this constant pool item.
*/
int hashCode;
/**
* Link to another constant pool item, used for collision lists in the
* constant pool's hash table.
*/
Item next;
/**
* Constructs an uninitialized {@link Item}.
*/
Item() {
}
/**
* Constructs an uninitialized {@link Item} for constant pool element at
* given position.
*
* @param index index of the item to be constructed.
*/
Item(final int index) {
this.index = index;
}
/**
* Constructs a copy of the given item.
*
* @param index index of the item to be constructed.
* @param i the item that must be copied into the item to be constructed.
*/
Item(final int index, final Item i) {
this.index = index;
type = i.type;
intVal = i.intVal;
longVal = i.longVal;
strVal1 = i.strVal1;
strVal2 = i.strVal2;
strVal3 = i.strVal3;
hashCode = i.hashCode;
}
/**
* Sets this item to an integer item.
*
* @param intVal the value of this item.
*/
void set(final int intVal) {
this.type = ClassWriter.INT;
this.intVal = intVal;
this.hashCode = 0x7FFFFFFF & (type + intVal);
}
/**
* Sets this item to a long item.
*
* @param longVal the value of this item.
*/
void set(final long longVal) {
this.type = ClassWriter.LONG;
this.longVal = longVal;
this.hashCode = 0x7FFFFFFF & (type + (int) longVal);
}
/**
* Sets this item to a float item.
*
* @param floatVal the value of this item.
*/
void set(final float floatVal) {
this.type = ClassWriter.FLOAT;
this.intVal = Float.floatToRawIntBits(floatVal);
this.hashCode = 0x7FFFFFFF & (type + (int) floatVal);
}
/**
* Sets this item to a double item.
*
* @param doubleVal the value of this item.
*/
void set(final double doubleVal) {
this.type = ClassWriter.DOUBLE;
this.longVal = Double.doubleToRawLongBits(doubleVal);
this.hashCode = 0x7FFFFFFF & (type + (int) doubleVal);
}
/**
* Sets this item to an item that do not hold a primitive value.
*
* @param type the type of this item.
* @param strVal1 first part of the value of this item.
* @param strVal2 second part of the value of this item.
* @param strVal3 third part of the value of this item.
*/
void set(
final int type,
final String strVal1,
final String strVal2,
final String strVal3)
{
this.type = type;
this.strVal1 = strVal1;
this.strVal2 = strVal2;
this.strVal3 = strVal3;
switch (type) {
case ClassWriter.UTF8:
case ClassWriter.STR:
case ClassWriter.CLASS:
case ClassWriter.TYPE_NORMAL:
hashCode = 0x7FFFFFFF & (type + strVal1.hashCode());
return;
case ClassWriter.NAME_TYPE:
hashCode = 0x7FFFFFFF & (type + strVal1.hashCode()
* strVal2.hashCode());
return;
// ClassWriter.FIELD:
// ClassWriter.METH:
// ClassWriter.IMETH:
default:
hashCode = 0x7FFFFFFF & (type + strVal1.hashCode()
* strVal2.hashCode() * strVal3.hashCode());
}
}
/**
* Indicates if the given item is equal to this one.
*
* @param i the item to be compared to this one.
* @return <tt>true</tt> if the given item if equal to this one,
* <tt>false</tt> otherwise.
*/
boolean isEqualTo(final Item i) {
if (i.type == type) {
switch (type) {
case ClassWriter.INT:
case ClassWriter.FLOAT:
return i.intVal == intVal;
case ClassWriter.TYPE_MERGED:
case ClassWriter.LONG:
case ClassWriter.DOUBLE:
return i.longVal == longVal;
case ClassWriter.UTF8:
case ClassWriter.STR:
case ClassWriter.CLASS:
case ClassWriter.TYPE_NORMAL:
return i.strVal1.equals(strVal1);
case ClassWriter.TYPE_UNINIT:
return i.intVal == intVal && i.strVal1.equals(strVal1);
case ClassWriter.NAME_TYPE:
return i.strVal1.equals(strVal1)
&& i.strVal2.equals(strVal2);
// ClassWriter.FIELD:
// ClassWriter.METH:
// ClassWriter.IMETH:
default:
return i.strVal1.equals(strVal1)
&& i.strVal2.equals(strVal2)
&& i.strVal3.equals(strVal3);
}
}
return false;
}
}