Package org.apache.bcel.classfile

Class ConstantValue

java.lang.Object

org.apache.bcel.classfile.Attribute

org.apache.bcel.classfile.ConstantValue

All Implemented Interfaces:

Cloneable, Node

public final class ConstantValue
extends Attribute

This class is derived from Attribute and represents a constant value, i.e., a default value for initializing a class field. This class is instantiated by the Attribute.readAttribute() method.

See Also:

• Attribute

Field Summary

Fields

Modifier and Type	Field	Description
private int	constantvalue_index

Fields inherited from class org.apache.bcel.classfile.Attribute

constant_pool, length, name_index, tag

Constructor Summary

Constructors

Constructor	Description
ConstantValue(int name_index, int length, int constantvalue_index, ConstantPool constant_pool)
ConstantValue(int name_index, int length, DataInput input, ConstantPool constant_pool)	Construct object from input stream.
ConstantValue(ConstantValue c)	Initialize from another object.

Method Summary

Modifier and Type	Method	Description
void	accept(Visitor v)	Called by objects that are traversing the nodes of the tree implicitely defined by the contents of a Java class.
Attribute	copy(ConstantPool _constant_pool)
void	dump(DataOutputStream file)	Dump constant value attribute to file stream on binary format.
int	getConstantValueIndex()
void	setConstantValueIndex(int constantvalue_index)
String	toString()

Methods inherited from class org.apache.bcel.classfile.Attribute

addAttributeReader, addAttributeReader, clone, getConstantPool, getLength, getName, getNameIndex, getTag, println, readAttribute, readAttribute, removeAttributeReader, setConstantPool, setLength, setNameIndex

Methods inherited from class java.lang.Object

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

Field Details

constantvalue_index

private int constantvalue_index

Constructor Details

ConstantValue

public ConstantValue(ConstantValue c)

Initialize from another object. Note that both objects use the same references (shallow copy). Use clone() for a physical copy.

ConstantValue

ConstantValue(int name_index,
 int length,
 DataInput input,
 ConstantPool constant_pool)
       throws IOException

Construct object from input stream.

Parameters:

name_index - Name index in constant pool

length - Content length in bytes

input - Input stream

constant_pool - Array of constants

Throws:

IOException

ConstantValue

public ConstantValue(int name_index,
 int length,
 int constantvalue_index,
 ConstantPool constant_pool)

Parameters:

name_index - Name index in constant pool

length - Content length in bytes

constantvalue_index - Index in constant pool

constant_pool - Array of constants

Method Details

accept

public void accept(Visitor v)

Called by objects that are traversing the nodes of the tree implicitely defined by the contents of a Java class. I.e., the hierarchy of methods, fields, attributes, etc. spawns a tree of objects.

Specified by:

accept in interface Node

Specified by:

accept in class Attribute

Parameters:

v - Visitor object

dump

public void dump(DataOutputStream file)
          throws IOException

Dump constant value attribute to file stream on binary format.

Overrides:

dump in class Attribute

Parameters:

file - Output file stream

Throws:

IOException

getConstantValueIndex

public int getConstantValueIndex()

Returns:

Index in constant pool of constant value.

setConstantValueIndex

public void setConstantValueIndex(int constantvalue_index)

Parameters:

constantvalue_index - the index info the constant pool of this constant value

toString

public String toString()

Overrides:

toString in class Attribute

Returns:

String representation of constant value.

copy

public Attribute copy(ConstantPool _constant_pool)

Specified by:

copy in class Attribute

Returns:

deep copy of this attribute