public class

Attribute

extends Object
java.lang.Object
   ↳ org.eclipse.sisu.space.asm.Attribute

Class Overview

A non standard class, field, method or code attribute.

Summary

Fields
public final String type The type of this attribute.
Protected Constructors
Attribute(String type)
Constructs a new empty attribute.
Public Methods
boolean isCodeAttribute()
Returns true if this type of attribute is a code attribute.
boolean isUnknown()
Returns true if this type of attribute is unknown.
Protected Methods
Label[] getLabels()
Returns the labels corresponding to this attribute.
Attribute read(ClassReader cr, int off, int len, char[] buf, int codeOff, Label[] labels)
Reads a type attribute.
ByteVector write(ClassWriter cw, byte[] code, int len, int maxStack, int maxLocals)
Returns the byte array form of this attribute.
[Expand]
Inherited Methods
From class java.lang.Object

Fields

public final String type

The type of this attribute.

Protected Constructors

protected Attribute (String type)

Constructs a new empty attribute.

Parameters
type the type of the attribute.

Public Methods

public boolean isCodeAttribute ()

Returns true if this type of attribute is a code attribute.

Returns
  • true if this type of attribute is a code attribute.

public boolean isUnknown ()

Returns true if this type of attribute is unknown. The default implementation of this method always returns true.

Returns
  • true if this type of attribute is unknown.

Protected Methods

protected Label[] getLabels ()

Returns the labels corresponding to this attribute.

Returns
  • the labels corresponding to this attribute, or null if this attribute is not a code attribute that contains labels.

protected Attribute read (ClassReader cr, int off, int len, char[] buf, int codeOff, Label[] labels)

Reads a type attribute. This method must return a new Attribute object, of type type, corresponding to the len bytes starting at the given offset, in the given class reader.

Parameters
cr the class that contains the attribute to be read.
off index of the first byte of the attribute's content in cr.b. The 6 attribute header bytes, containing the type and the length of the attribute, are not taken into account here.
len the length of the attribute's content.
buf buffer to be used to call readUTF8, readClass or readConst.
codeOff index of the first byte of code's attribute content in cr.b, or -1 if the attribute to be read is not a code attribute. The 6 attribute header bytes, containing the type and the length of the attribute, are not taken into account here.
labels the labels of the method's code, or null if the attribute to be read is not a code attribute.
Returns
  • a new Attribute object corresponding to the given bytes.

protected ByteVector write (ClassWriter cw, byte[] code, int len, int maxStack, int maxLocals)

Returns the byte array form of this attribute.

Parameters
cw the class to which this attribute must be added. This parameter can be used to add to the constant pool of this class the items that corresponds to this attribute.
code the bytecode of the method corresponding to this code attribute, or null if this attribute is not a code attributes.
len the length of the bytecode of the method corresponding to this code attribute, or null if this attribute is not a code attribute.
maxStack the maximum stack size of the method corresponding to this code attribute, or -1 if this attribute is not a code attribute.
maxLocals the maximum number of local variables of the method corresponding to this code attribute, or -1 if this attribute is not a code attribute.
Returns
  • the byte array form of this attribute.