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ASM: a very small and fast Java bytecode manipulation framework Copyright (c) 2000-2007 INRIA, France Telecom 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. Neither the name of the copyright holders nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS 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 COPYRIGHT OWNER OR 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.
 
 package org.objectweb.asm;

A constant pool item. Constant pool items can be created with the 'newXXX' methods in the ClassWriter class.

Author(s):
Eric Bruneton
 
 final class Item {

    
Index of this item in the constant pool.
 
     int 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 ClassWriter.INT, ClassWriter.LONG, ClassWriter.FLOAT, ClassWriter.DOUBLE, ClassWriter.UTF8, ClassWriter.STR, ClassWriter.CLASS, ClassWriter.NAME_TYPE, ClassWriter.FIELD, ClassWriter.METH, ClassWriter.IMETH. Special Item types are used for Items that are stored in the ClassWriter ClassWriter.typeTable, instead of the constant pool, in order to avoid clashes with normal constant pool items in the ClassWriter constant pool's hash table. These special item types are ClassWriter.TYPE_NORMAL, ClassWriter.TYPE_UNINIT and ClassWriter.TYPE_MERGED.
 
     int type;

    
Value of this item, for an integer item.
 
     int intVal;

    
Value of this item, for a long item.
 
     long longVal;

    
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 Item.
    Item() {
    }

    
Constructs an uninitialized Item for constant pool element at given position.

Parameters:
index index of the item to be constructed.
    Item(final int index) {
        this. = index;
    }

    
Constructs a copy of the given item.

Parameters:
index index of the item to be constructed.
i the item that must be copied into the item to be constructed.
    Item(final int indexfinal Item i) {
        this. = index;
         = i.type;
         = i.intVal;
         = i.longVal;
         = i.strVal1;
         = i.strVal2;
         = i.strVal3;
         = i.hashCode;
    }

    
Sets this item to an integer item.

Parameters:
intVal the value of this item.
    void set(final int intVal) {
        this. = .;
        this. = intVal;
        this. = 0x7FFFFFFF & ( + intVal);
    }

    
Sets this item to a long item.

Parameters:
longVal the value of this item.
    void set(final long longVal) {
        this. = .;
        this. = longVal;
        this. = 0x7FFFFFFF & ( + (intlongVal);
    }

    
Sets this item to a float item.

Parameters:
floatVal the value of this item.
    void set(final float floatVal) {
        this. = .;
        this. = Float.floatToRawIntBits(floatVal);
        this. = 0x7FFFFFFF & ( + (intfloatVal);
    }

    
Sets this item to a double item.

Parameters:
doubleVal the value of this item.
    void set(final double doubleVal) {
        this. = .;
        this. = Double.doubleToRawLongBits(doubleVal);
        this. = 0x7FFFFFFF & ( + (intdoubleVal);
    }

    
Sets this item to an item that do not hold a primitive value.

Parameters:
type the type of this item.
strVal1 first part of the value of this item.
strVal2 second part of the value of this item.
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;
        this. = strVal1;
        this. = strVal2;
        this. = strVal3;
        switch (type) {
            case .:
            case .:
            case .:
            case .:
                 = 0x7FFFFFFF & (type + strVal1.hashCode());
                return;
            case .:
                 = 0x7FFFFFFF & (type + strVal1.hashCode()
                        * strVal2.hashCode());
                return;
                // ClassWriter.FIELD:
                // ClassWriter.METH:
                // ClassWriter.IMETH:
            default:
                 = 0x7FFFFFFF & (type + strVal1.hashCode()
                        * strVal2.hashCode() * strVal3.hashCode());
        }
    }

    
Indicates if the given item is equal to this one.

Parameters:
i the item to be compared to this one.
Returns:
true if the given item if equal to this one, false otherwise.
    boolean isEqualTo(final Item i) {
        if (i.type == ) {
            switch () {
                case .:
                case .:
                    return i.intVal == ;
                case .:
                case .:
                case .:
                    return i.longVal == ;
                case .:
                case .:
                case .:
                case .:
                    return i.strVal1.equals();
                case .:
                    return i.intVal ==  && i.strVal1.equals();
                case .:
                    return i.strVal1.equals()
                            && i.strVal2.equals();
                    // ClassWriter.FIELD:
                    // ClassWriter.METH:
                    // ClassWriter.IMETH:
                default:
                    return i.strVal1.equals()
                            && i.strVal2.equals()
                            && i.strVal3.equals();
            }
        }
        return false;
    }
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