Class PermittedSubclasses

java.lang.Object

org.apache.bcel.classfile.Attribute

org.apache.bcel.classfile.PermittedSubclasses

All Implemented Interfaces:

Cloneable, Node

public final class PermittedSubclasses
extends Attribute

This class is derived from Attribute and records the classes and interfaces that are permitted to extend or implement the current class or interface. There may be at most one PermittedSubclasses attribute in a ClassFile structure.

Since:

6.13.0

See Also:

• Attribute

Field Summary

Fields inherited from class Attribute

constant_pool, EMPTY_ARRAY, length, name_index, tag

Constructor Summary

Constructors

Constructor	Description
PermittedSubclasses(int nameIndex, int length, int[] classes, ConstantPool constantPool)	Constructs object from table of class indices in constant pool.
PermittedSubclasses(PermittedSubclasses 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 implicitly defined by the contents of a Java class.
Attribute	copy(ConstantPool constantPool)	Creates a deep clone of this object given constant pool.
void	dump(DataOutputStream file)	Dumps PermittedSubclasses attribute to file stream in binary format.
int[]	getClasses()	Gets the class indices in constant pool.
String[]	getClassNames()	Gets permitted class names.
int	getNumberClasses()	Gets the number of classes.
void	setClasses(int[] classes)	Sets class indices.
String	toString()	String representation of PermittedSubclasses (for debugging purposes).

Methods inherited from class Attribute

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

Methods inherited from class Object

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

Constructor Details

PermittedSubclasses

public PermittedSubclasses(int nameIndex,
 int length,
 int[] classes,
 ConstantPool constantPool)

Constructs object from table of class indices in constant pool.

Parameters:

nameIndex - Index in constant pool.

length - Content length in bytes.

classes - Table of indices in constant pool.

constantPool - Array of constants.

PermittedSubclasses

public PermittedSubclasses(PermittedSubclasses c)

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

Parameters:

c - Source to copy.

Method Details

accept

public void accept(Visitor v)

Called by objects that are traversing the nodes of the tree implicitly 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.

copy

public Attribute copy(ConstantPool constantPool)

Creates a deep clone of this object given constant pool.

Specified by:

copy in class Attribute

Parameters:

constantPool - constant pool to save.

Returns:

deep copy of this attribute.

dump

public void dump(DataOutputStream file)
          throws IOException

Dumps PermittedSubclasses attribute to file stream in binary format.

Overrides:

dump in class Attribute

Parameters:

file - Output file stream.

Throws:

IOException - Thrown if an I/O error occurs.

getClasses

public int[] getClasses()

Gets the class indices in constant pool.

Returns:

array of indices into constant pool of class names.

getClassNames

public String[] getClassNames()

Gets permitted class names.

Returns:

string array of class names.

getNumberClasses

public int getNumberClasses()

Gets the number of classes.

Returns:

Length of classes table.

setClasses

public void setClasses(int[] classes)

Sets class indices.

Parameters:

classes - The list of class indexes Also redefines number_of_classes according to table length.

toString

public String toString()

String representation of PermittedSubclasses (for debugging purposes).

Overrides:

toString in class Attribute

Returns:

String representation, that is, a list of permitted subclasses.