/jEdit/tags/jedit-4-5-pre1/org/gjt/sp/jedit/bsh/org/objectweb/asm/Item.java
Java | 256 lines | 98 code | 41 blank | 117 comment | 8 complexity | 5004aa512c1682caac8bce2b6e60787a MD5 | raw file
Possible License(s): BSD-3-Clause, AGPL-1.0, Apache-2.0, LGPL-2.0, LGPL-3.0, GPL-2.0, CC-BY-SA-3.0, LGPL-2.1, GPL-3.0, MPL-2.0-no-copyleft-exception, IPL-1.0
- /***
- * ASM: a very small and fast Java bytecode manipulation framework
- * Copyright (C) 2000 INRIA, France Telecom
- * Copyright (C) 2002 France Telecom
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- * Contact: Eric.Bruneton@rd.francetelecom.com
- *
- * Author: Eric Bruneton
- */
- package org.gjt.sp.jedit.bsh.org.objectweb.asm;
- /**
- * A constant pool item. Constant pool items can be created with the 'newXXX'
- * methods in the {@link ClassWriter} class.
- */
- final class Item {
- /**
- * Index of this item in the constant pool.
- */
- short index;
- /**
- * Type of this constant pool item. A single class is used to represent all
- * constant pool item types, in order to minimize the bytecode size of this
- * package. The value of this field is one of the constants defined in the
- * {@link ClassWriter ClassWriter} class.
- */
- int type;
- /**
- * Value of this item, for a {@link ClassWriter#INT INT} item.
- */
- int intVal;
- /**
- * Value of this item, for a {@link ClassWriter#LONG LONG} item.
- */
- long longVal;
- /**
- * Value of this item, for a {@link ClassWriter#FLOAT FLOAT} item.
- */
- float floatVal;
- /**
- * Value of this item, for a {@link ClassWriter#DOUBLE DOUBLE} item.
- */
- double doubleVal;
- /**
- * First part of the value of this item, for items that do not hold a
- * primitive value.
- */
- 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} object.
- */
- Item () {
- }
- /**
- * 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 short index, final Item i) {
- this.index = index;
- type = i.type;
- intVal = i.intVal;
- longVal = i.longVal;
- floatVal = i.floatVal;
- doubleVal = i.doubleVal;
- strVal1 = i.strVal1;
- strVal2 = i.strVal2;
- strVal3 = i.strVal3;
- hashCode = i.hashCode;
- }
- /**
- * Sets this item to an {@link ClassWriter#INT INT} item.
- *
- * @param intVal the value of this item.
- */
- void set (final int intVal) {
- this.type = ClassWriter.INT;
- this.intVal = intVal;
- this.hashCode = type + intVal;
- }
- /**
- * Sets this item to a {@link ClassWriter#LONG LONG} item.
- *
- * @param longVal the value of this item.
- */
- void set (final long longVal) {
- this.type = ClassWriter.LONG;
- this.longVal = longVal;
- this.hashCode = type + (int)longVal;
- }
- /**
- * Sets this item to a {@link ClassWriter#FLOAT FLOAT} item.
- *
- * @param floatVal the value of this item.
- */
- void set (final float floatVal) {
- this.type = ClassWriter.FLOAT;
- this.floatVal = floatVal;
- this.hashCode = type + (int)floatVal;
- }
- /**
- * Sets this item to a {@link ClassWriter#DOUBLE DOUBLE} item.
- *
- * @param doubleVal the value of this item.
- */
- void set (final double doubleVal) {
- this.type = ClassWriter.DOUBLE;
- this.doubleVal = doubleVal;
- this.hashCode = 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:
- hashCode = type + strVal1.hashCode();
- return;
- case ClassWriter.NAME_TYPE:
- hashCode = type + strVal1.hashCode()*strVal2.hashCode();
- return;
- //case ClassWriter.FIELD:
- //case ClassWriter.METH:
- //case ClassWriter.IMETH:
- default:
- hashCode = type + strVal1.hashCode()*strVal2.hashCode()*strVal3.hashCode();
- return;
- }
- }
- /**
- * 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:
- return i.intVal == intVal;
- case ClassWriter.LONG:
- return i.longVal == longVal;
- case ClassWriter.FLOAT:
- return i.floatVal == floatVal;
- case ClassWriter.DOUBLE:
- return i.doubleVal == doubleVal;
- case ClassWriter.UTF8:
- case ClassWriter.STR:
- case ClassWriter.CLASS:
- return i.strVal1.equals(strVal1);
- case ClassWriter.NAME_TYPE:
- return i.strVal1.equals(strVal1) &&
- i.strVal2.equals(strVal2);
- //case ClassWriter.FIELD:
- //case ClassWriter.METH:
- //case ClassWriter.IMETH:
- default:
- return i.strVal1.equals(strVal1) &&
- i.strVal2.equals(strVal2) &&
- i.strVal3.equals(strVal3);
- }
- }
- return false;
- }
- }