harpoon.IR.RawClass
Class Attribute

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

Direct Known Subclasses:

AttributeCode, AttributeConstantValue, AttributeExceptions, AttributeInnerClasses, AttributeLineNumberTable, AttributeLocalVariableTable, AttributeSignature, AttributeSourceFile, AttributeSynthetic, AttributeUnknown

public abstract class Attribute
extends Object

Attributes are used in the ClassFile, field_info, method_info, and Code_attribute structures of the class file format. Attribute is the superclass of the different types of attribute information classes.

Version:

$Id: Attribute.java,v 1.4 2003/09/05 21:45:15 cananian Exp $

Author:

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

See Also:

"The Java Virtual Machine Specification, section 4.7", ClassFile, FieldInfo, MethodInfo, AttributeCode

Field Summary

int	attribute_name_index The attribute_name_index must be a valid unsigned 16-bit index into the constant pool of the class.
protected ClassFile	parent ClassFile in which this attribute information is found.

Constructor Summary

protected

Attribute(ClassFile p, int attribute_name_index) Constructor.

Method Summary

abstract long	attribute_length() The value of the attribute_length item indicates the length of the attribute, excluding the initial six bytes.
ConstantUtf8	attribute_name_index()
String	attribute_name()
void	print(PrintWriter pw, int indent) Pretty-print this attribute structure.
static Attribute	read(ClassFile parent, ClassDataInputStream in) Read an Attribute from a ClassDataInputStream.
String	toString() Create a human-readable representation for the Attribute.
abstract void	write(ClassDataOutputStream out) Write Attribute to bytecode file.

Methods inherited from class java.lang.Object

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

Field Detail

parent

protected ClassFile parent

ClassFile in which this attribute information is found.

attribute_name_index

public int attribute_name_index

The attribute_name_index must be a valid unsigned 16-bit index into the constant pool of the class. The constant_pool entry at attribute_name_index must be a CONSTANT_Utf8 string representing the name of the attribute.

Constructor Detail

Attribute

protected Attribute(ClassFile p,
                    int attribute_name_index)

Constructor. Meant for use only by subclasses.

Method Detail

attribute_length

public abstract long attribute_length()

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

read

public static Attribute read(ClassFile parent,
                             ClassDataInputStream in)
                      throws IOException

Read an Attribute from a ClassDataInputStream.

Throws:

IOException

write

public abstract void write(ClassDataOutputStream out)
                    throws IOException

Write Attribute to bytecode file.

Throws:

IOException

attribute_name_index

public ConstantUtf8 attribute_name_index()

attribute_name

public String attribute_name()

toString

public String toString()

Create a human-readable representation for the Attribute.

Overrides:

toString in class Object

print

public void print(PrintWriter pw,
                  int indent)

Pretty-print this attribute structure.