org.apache.directory.shared.ldap.filter
Class AssertionNode

java.lang.Object
  org.apache.directory.shared.ldap.filter.AbstractExprNode
      org.apache.directory.shared.ldap.filter.AssertionNode

All Implemented Interfaces:

ExprNode

public class AssertionNode
extends AbstractExprNode

Node used for the application of arbitrary predicates on return candidates. Applies dynamic and programatic criteria for the selection of candidates for return. Nodes of this type may be introduced into the filter expression to provided the opportunity to constrain the search further without altering the search algorithm.

Version:

$Revision: 656886 $

Author:

Apache Directory Project

Field Summary

Fields inherited from class org.apache.directory.shared.ldap.filter.AbstractExprNode

annotations, assertionType

Constructor Summary

AssertionNode(Assertion assertion)
Creates an AssertionNode using an arbitrary candidate assertion.

AssertionNode(Assertion assertion, java.lang.String desc)
Creates an AssertionNode using an arbitrary candidate assertion with a descriptions used for filter AST walker dumps.

Method Summary

java.lang.Object	accept(FilterVisitor visitor) Element/node accept method for visitor pattern.
Assertion	getAssertion() Gets the Assertion used by this assertion node.
int	hashCode()
boolean	isLeaf() Always returns true since an AssertionNode has no children.
java.lang.String	toString()

Methods inherited from class org.apache.directory.shared.ldap.filter.AbstractExprNode

equals, get, getAnnotations, getAssertionType, printRefinementToBuffer, set

Methods inherited from class java.lang.Object

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

Constructor Detail

AssertionNode

public AssertionNode(Assertion assertion)

Creates an AssertionNode using an arbitrary candidate assertion.

Parameters:

assertion - the arbitrary selection logic.

AssertionNode

public AssertionNode(Assertion assertion,
                     java.lang.String desc)

Creates an AssertionNode using an arbitrary candidate assertion with a descriptions used for filter AST walker dumps.

Parameters:

assertion - the arbitrary selection logic.

desc - the printout representation for filter prints.

Method Detail

getAssertion

public Assertion getAssertion()

Gets the Assertion used by this assertion node.

Returns:

the assertion used by this node

isLeaf

public boolean isLeaf()

Always returns true since an AssertionNode has no children.

Specified by:

isLeaf in interface ExprNode

Specified by:

isLeaf in class AbstractExprNode

Returns:

true if the node is a leaf,false otherwise

See Also:

ExprNode.isLeaf()

hashCode

public int hashCode()

Overrides:

hashCode in class AbstractExprNode

Returns:

the instance's hash code

See Also:

Object.hashCode()

accept

public java.lang.Object accept(FilterVisitor visitor)

Description copied from interface: ExprNode

Element/node accept method for visitor pattern.

Parameters:

visitor - the filter expression tree structure visitor

Returns:

The modified element

See Also:

ExprNode.accept( org.apache.directory.shared.ldap.filter.FilterVisitor)

toString

public java.lang.String toString()

Overrides:

toString in class AbstractExprNode

Returns:

A string representing the AndNode

See Also:

Object.toString()