de.unidu.is.retrieval
Class OrQueryNode

java.lang.Object
  de.unidu.is.retrieval.BooleanQueryNode
      de.unidu.is.retrieval.OrQueryNode

All Implemented Interfaces:

QueryNode

public class OrQueryNode

extends BooleanQueryNode

A query node representing an OR.

Since:

2004-05-22

Version:

$Revision: 1.7 $, $Date: 2005/02/28 22:27:55 $

Author:

Henrik Nottelmann

Field Summary

Fields inherited from class de.unidu.is.retrieval.BooleanQueryNode

children

Constructor Summary

OrQueryNode()
Creates a new object.

OrQueryNode(java.util.Set children)
Creates a new object.

Method Summary

protected java.lang.String	getConnector() Returns a XIRQL representation of the connector represented by this node.
boolean	isDF() Returns true iff the node is in disjunctive form.
protected BooleanQueryNode	newNode() Returns a new, empty node of this type.
protected boolean	sameClass(QueryNode node) Returns true iff the specified query node represents the same class as this node.
QueryNode	toDF() Converts the node and its subtree into disjunctive form.

Methods inherited from class de.unidu.is.retrieval.BooleanQueryNode

add, cloneNode, equals, getChildren, hashCode, iterator, setChildren, simplifiedNode, toPrefix, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

OrQueryNode

public OrQueryNode()

Creates a new object.

OrQueryNode

public OrQueryNode(java.util.Set children)

Creates a new object.

Parameters:

children - children children nodes

Method Detail

getConnector

protected java.lang.String getConnector()

Description copied from class: BooleanQueryNode

Returns a XIRQL representation of the connector represented by this node.

Specified by:

getConnector in class BooleanQueryNode

Returns:

XIRQL representation of the connector

sameClass

protected boolean sameClass(QueryNode node)

Description copied from class: BooleanQueryNode

Returns true iff the specified query node represents the same class as this node.

Specified by:

sameClass in class BooleanQueryNode

Parameters:

node - query node to compare

Returns:

true iff the specified query node represents the same class as this node

toDF

public QueryNode toDF()

Description copied from interface: QueryNode

Converts the node and its subtree into disjunctive form.

Returns:

node in disjunctive form (or this node, if no simplication is required)

isDF

public boolean isDF()

Description copied from interface: QueryNode

Returns true iff the node is in disjunctive form.

Returns:

true iff the node is in disjunctive form

newNode

protected BooleanQueryNode newNode()

Description copied from class: BooleanQueryNode

Returns a new, empty node of this type.

Specified by:

newNode in class BooleanQueryNode

Returns:

new, empty node of this type