com.vladium.jcd.cls
Interface IInterfaceCollection

All Superinterfaces:

java.lang.Cloneable, IClassFormatOutput

All Known Implementing Classes:

InterfaceCollection

public interface IInterfaceCollection

extends java.lang.Cloneable, IClassFormatOutput

An abstraction of the 'interfaces' component of .class format. The contents are constant pool indices of CONSTANT_Class_info structures corresponding to direct superinterfaces of this class/interface. The order in which they appear is the left-to-right order of their declaration in the implements/extends clause.

Author:

(C) 2001, Vlad Roubtsov

Method Summary

void	accept(IClassDefVisitor visitor, java.lang.Object ctx)
int	add(int interface_index) Appends a new superinterface pointer to the collection.
java.lang.Object	clone()
int	get(int offset) Returns the CONSTANT_Class_info constant pool index for offset'th direct superinterface.
int	set(int offset, int interface_index) Replaces superinterface pointer number 'offset' with new value 'interface_index'.
int	size() Returns the number of direct superinterfaces for this class/interface.

Methods inherited from interface com.vladium.jcd.compiler.IClassFormatOutput

writeInClassFormat

Method Detail

get

public int get(int offset)

Returns the CONSTANT_Class_info constant pool index for offset'th direct superinterface.

Parameters:

offset - superinterface number [must be in [0, size()) range]

Returns:

constant pool index [always positive]

Throws:

java.lang.IndexOutOfBoundsException - if 'offset' is outside of valid range

size

public int size()

Returns the number of direct superinterfaces for this class/interface.

Returns:

int number of direct superinterfaces [can be 0]

clone

public java.lang.Object clone()

accept

public void accept(IClassDefVisitor visitor,
                   java.lang.Object ctx)

add

public int add(int interface_index)

Appends a new superinterface pointer to the collection. No duplicate checks are made.

Parameters:

interface_index - constant pool index [must be positive; input not validated]

Returns:

offset of the new pointer [same as size()-1 when called after this method]

set

public int set(int offset,
               int interface_index)

Replaces superinterface pointer number 'offset' with new value 'interface_index'. No duplicate checks are made. It is the responsibility of the caller to ensure that the relevant CONSTANT_Class_info descriptor will be found in the constant pool, in the slot pointed to by 'interface_index'.

Parameters:

offset - offset of the superinterface pointer to replace [must be in [0, size()) range]

interface_index - constant pool index [must be positive; input not validated]

Returns:

previous value at the given index [always positive]

Throws:

java.lang.IndexOutOfBoundsException - if 'offset' is outside of valid range