org.springframework.asm

Class Item

java.lang.Object

org.springframework.asm.Item

final class Item
extends java.lang.Object

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

Author:

Eric Bruneton

Field Summary

Fields

Modifier and Type	Field and Description
(package private) int	hashCode The hash code value of this constant pool item.
(package private) int	index Index of this item in the constant pool.
(package private) int	intVal Value of this item, for an integer item.
(package private) long	longVal Value of this item, for a long item.
(package private) Item	next Link to another constant pool item, used for collision lists in the constant pool's hash table.
(package private) java.lang.String	strVal1 First part of the value of this item, for items that do not hold a primitive value.
(package private) java.lang.String	strVal2 Second part of the value of this item, for items that do not hold a primitive value.
(package private) java.lang.String	strVal3 Third part of the value of this item, for items that do not hold a primitive value.
(package private) int	type Type of this constant pool item.

Constructor Summary

Constructors

Constructor and Description
Item() Constructs an uninitialized Item.
Item(int index) Constructs an uninitialized Item for constant pool element at given position.
Item(int index, Item i) Constructs a copy of the given item.

Method Summary

Modifier and Type	Method and Description
(package private) boolean	isEqualTo(Item i) Indicates if the given item is equal to this one.
(package private) void	set(double doubleVal) Sets this item to a double item.
(package private) void	set(float floatVal) Sets this item to a float item.
(package private) void	set(int intVal) Sets this item to an integer item.
(package private) void	set(int position, int hashCode) Sets the item to a BootstrapMethod item.
(package private) void	set(int type, java.lang.String strVal1, java.lang.String strVal2, java.lang.String strVal3) Sets this item to an item that do not hold a primitive value.
(package private) void	set(long longVal) Sets this item to a long item.
(package private) void	set(java.lang.String name, java.lang.String desc, int bsmIndex) Sets the item to an InvokeDynamic item.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

index

int index

Index of this item in the constant pool.

type

int type

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, ClassWriter.MODULE, ClassWriter.PACKAGE, ClassWriter.MTYPE, ClassWriter.INDY. MethodHandle constant 9 variations are stored using a range of 9 values from ClassWriter.HANDLE_BASE + 1 to ClassWriter.HANDLE_BASE + 9. 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.

intVal

int intVal

Value of this item, for an integer item.

longVal

long longVal

Value of this item, for a long item.

strVal1

java.lang.String strVal1

First part of the value of this item, for items that do not hold a primitive value.

strVal2

java.lang.String strVal2

Second part of the value of this item, for items that do not hold a primitive value.

strVal3

java.lang.String strVal3

Third part of the value of this item, for items that do not hold a primitive value.

hashCode

int hashCode

The hash code value of this constant pool item.

next

Item next

Link to another constant pool item, used for collision lists in the constant pool's hash table.

Constructor Detail

Item

Item()

Constructs an uninitialized Item.

Item

Item(int index)

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

Parameters:

index - index of the item to be constructed.

Item

Item(int index,
     Item i)

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.

Method Detail

set

void set(int intVal)

Sets this item to an integer item.

Parameters:

intVal - the value of this item.

set

void set(long longVal)

Sets this item to a long item.

Parameters:

longVal - the value of this item.

set

void set(float floatVal)

Sets this item to a float item.

Parameters:

floatVal - the value of this item.

set

void set(double doubleVal)

Sets this item to a double item.

Parameters:

doubleVal - the value of this item.

set

void set(int type,
         java.lang.String strVal1,
         java.lang.String strVal2,
         java.lang.String strVal3)

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.

set

void set(java.lang.String name,
         java.lang.String desc,
         int bsmIndex)

Sets the item to an InvokeDynamic item.

Parameters:

name - invokedynamic's name.

desc - invokedynamic's desc.

bsmIndex - zero based index into the class attribute BootrapMethods.

set

void set(int position,
         int hashCode)

Sets the item to a BootstrapMethod item.

Parameters:

position - position in byte in the class attribute BootrapMethods.

hashCode - hashcode of the item. This hashcode is processed from the hashcode of the bootstrap method and the hashcode of all bootstrap arguments.

isEqualTo

boolean isEqualTo(Item i)

Indicates if the given item is equal to this one. This method assumes that the two items have the same type.

Parameters:

i - the item to be compared to this one. Both items must have the same type.

Returns:

true if the given item if equal to this one, false otherwise.