File Doc Category Size Date Package
ConstantValueAttribute_info.java API Doc Android 1.5 API 4597 Wed May 06 22:41:16 BST 2009 com.vladium.jcd.cls.attribute

ConstantValueAttribute_info

java.lang.Object
- Attribute_info

public final class ConstantValueAttribute_info extends Attribute_info

The ConstantValue attribute is a fixed-length attribute used in the attributes table of the {@link com.vladium.jcd.cls.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.

The ConstantValue attribute has the format

ConstantValue_attribute {
u2 attribute_name_index;
u4 attribute_length;
u2 constantvalue_index;
}

The value of the constantvalue_index item 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, as shown below:

Field Type Entry Type

long CONSTANT_Long

float CONSTANT_Float

double CONSTANT_Double

int, short, char, byte, boolean CONSTANT_Integer

java.lang.String CONSTANT_String

author: (C) 2001, Vlad Roubtsov

Fields Summary
public int
m_value_index
private static final boolean
DEBUG
Constructors Summary
public ConstantValueAttribute_info(int attribute_name_index, int value_index)
super (attribute_name_index, 2); m_value_index = value_index;
ConstantValueAttribute_info(int attribute_name_index, long attribute_length, com.vladium.jcd.lib.UDataInputStream bytes)
super (attribute_name_index, attribute_length); m_value_index = bytes.readU2 (); if (DEBUG) System.out.println ("\tconstantvalue_index: " + m_value_index);
Methods Summary
public void accept(IAttributeVisitor visitor, java.lang.Object ctx)
visitor.visit (this, ctx);
public java.lang.Object clone()
Performs a deep copy.
return super.clone ();
public com.vladium.jcd.cls.constant.CONSTANT_literal_info getValue(com.vladium.jcd.cls.ClassDef cls)
return (CONSTANT_literal_info) cls.getConstants ().get (m_value_index);
public long length()
return 8;
public java.lang.String toString()
// TODO: return more data here return "ConstantValueAttribute_info: [attribute_name_index = " + m_name_index + ", attribute_length = " + m_attribute_length + ']";
public void writeInClassFormat(com.vladium.jcd.lib.UDataOutputStream out)
super.writeInClassFormat (out); out.writeU2 (m_value_index);