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:

java.lang.Cloneable, ExprNode

public final class UndefinedNode
extends AbstractExprNode

An empty class used for Undefined Nodes.

Version:

$Rev$, $Date$

Field Summary

Fields

Modifier and Type	Field and Description
static UndefinedNode	UNDEFINED_NODE A static instance of this node

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

annotations, assertionType, isSchemaAware

Constructor Summary

Constructors

Modifier	Constructor and Description
private	UndefinedNode() Creates a new instance of UndefinedNode.

Method Summary

Modifier and Type	Method and Description
java.lang.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.
java.lang.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 UndefinedNode UNDEFINED_NODE

A static instance of this node

Constructor Detail

UndefinedNode

private UndefinedNode()

Creates a new instance of UndefinedNode.

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 java.lang.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 java.lang.String toString()

Overrides:

toString in class AbstractExprNode

See Also:

Object.toString()