harpoon.IR.RawClass
Class AttributeConstantValue

java.lang.Object
  harpoon.IR.RawClass.Attribute
      harpoon.IR.RawClass.AttributeConstantValue

public class AttributeConstantValue
extends Attribute

The ConstantValue attribute is a fixed-length attribute used in the attributes table of the field_info structures. A ConstantValue attribute represents the value of a constant field that must be (explicitly or implicitly) static; that is, the ACC_STATIC bit in the flags item of the field_info structure must be set. The field is not required to be final. There can be no more than one ConstantValue attribute in the attributes table of a given field_info structure. The constant field represented by the field_info structure is assigned the value referenced by its ConstantValue attribute as part of its initialization.

CORRECTION FROM ERRATA: If a non-static field has a ConstantValue attribute, then the attribute is silently ignored.

Version:

$Id: AttributeConstantValue.java,v 1.3 2003/09/05 21:45:15 cananian Exp $

Author:

C. Scott Ananian <cananian@alumni.princeton.edu>

See Also:

Attribute, FieldInfo, ClassFile

Field Summary

static String	ATTRIBUTE_NAME The string naming this Attribute type.
int	constantvalue_index The value of the constantvalue_index must be a valid index into the constant_pool table.

Fields inherited from class harpoon.IR.RawClass.Attribute

attribute_name_index, parent

Constructor Summary

AttributeConstantValue(ClassFile parent, int attribute_name_index, int constantvalue_index)
Constructor.

Method Summary

long	attribute_length() The value of the attribute_length item indicates the length of the attribute, excluding the initial six bytes.
Constant	constantvalue_index()
void	print(PrintWriter pw, int indent) Pretty-print the contents of this attribute.
void	write(ClassDataOutputStream out) Write to bytecode stream.

Methods inherited from class harpoon.IR.RawClass.Attribute

attribute_name_index, attribute_name, read, toString

Methods inherited from class java.lang.Object

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

Field Detail

ATTRIBUTE_NAME

public static final String ATTRIBUTE_NAME

The string naming this Attribute type.

See Also:

Constant Field Values

constantvalue_index

public int constantvalue_index

The value of the constantvalue_index must be a valid index into the constant_pool table. The constant_pool entry at that index must give the constant value represented by this attribute.

The constant_pool entry must be of a type appropriate to the field.

Constructor Detail

AttributeConstantValue

public AttributeConstantValue(ClassFile parent,
                              int attribute_name_index,
                              int constantvalue_index)

Constructor.

Method Detail

attribute_length

public long attribute_length()

Description copied from class: Attribute

The value of the attribute_length item indicates the length of the attribute, excluding the initial six bytes.

Specified by:

attribute_length in class Attribute

constantvalue_index

public Constant constantvalue_index()

write

public void write(ClassDataOutputStream out)
           throws IOException

Write to bytecode stream.

Specified by:

write in class Attribute

Throws:

IOException

print

public void print(PrintWriter pw,
                  int indent)

Pretty-print the contents of this attribute.

Overrides:

print in class Attribute

Parameters:

indent - the indentation level to use.