org.apache.directory.api.ldap.model.filter
Class UndefinedNode

java.lang.Object
  org.apache.directory.api.ldap.model.filter.AbstractExprNode
      org.apache.directory.api.ldap.model.filter.UndefinedNode

All Implemented Interfaces:

Cloneable, ExprNode

public final class UndefinedNode
extends AbstractExprNode

An empty class used for Undefined Nodes.

Version:

$Rev$, $Date$

Author:

Apache Directory Project

Field Summary

static ExprNode

UNDEFINED_NODE A static instance of this node

Fields inherited from class org.apache.directory.api.ldap.model.filter.AbstractExprNode

annotations, assertionType, isSchemaAware

Method Summary

Object	accept(FilterVisitor visitor) Element/node accept method for visitor pattern.
boolean	isLeaf() Tests to see if this node is a leaf or branch node.
String	toString()

Methods inherited from class org.apache.directory.api.ldap.model.filter.AbstractExprNode

clone, equals, escapeFilterValue, get, getAnnotations, getAssertionType, hashCode, isSchemaAware, printRefinementToBuffer, set

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

UNDEFINED_NODE

public static final ExprNode UNDEFINED_NODE

A static instance of this node

Method Detail

isLeaf

public boolean isLeaf()

Tests to see if this node is a leaf or branch node. This implementation always returns false.

Returns:

true if the node is a leaf,false otherwise

accept

public Object accept(FilterVisitor visitor)

Element/node accept method for visitor pattern. This implementation always returns null.

Parameters:

visitor - the filter expression tree structure visitor TODO - what is this modified element ?

Returns:

the modified element

toString

public String toString()

Overrides:

toString in class AbstractExprNode

See Also:

Object.toString()