Class RemoveDeletedQueryNodesProcessor

A QueryNodeProcessorPipeline class removes every instance of DeletedQueryNode from a query node tree. If the resulting root node is a DeletedQueryNode, MatchNoDocsQueryNode is returned.

Inheritance

object

QueryNodeProcessor

RemoveDeletedQueryNodesProcessor

Implements

IQueryNodeProcessor

Inherited Members

QueryNodeProcessor.ProcessChildren(IQueryNode)

QueryNodeProcessor.SetQueryConfigHandler(QueryConfigHandler)

QueryNodeProcessor.GetQueryConfigHandler()

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: Lucene.Net.QueryParsers.Flexible.Core.Processors

Assembly: Lucene.Net.QueryParser.dll

Syntax

public class RemoveDeletedQueryNodesProcessor : QueryNodeProcessor, IQueryNodeProcessor

Constructors

RemoveDeletedQueryNodesProcessor()

A QueryNodeProcessorPipeline class removes every instance of DeletedQueryNode from a query node tree. If the resulting root node is a DeletedQueryNode, MatchNoDocsQueryNode is returned.

Declaration

public RemoveDeletedQueryNodesProcessor()

Methods

PostProcessNode(IQueryNode)

This method is invoked for every node when walking up the tree.

Declaration

protected override IQueryNode PostProcessNode(IQueryNode node)

Parameters

Type	Name	Description
IQueryNode	node	node the query node to be post-processed

Returns

Type	Description
IQueryNode	a query node

Overrides

QueryNodeProcessor.PostProcessNode(IQueryNode)

Exceptions

Type	Condition
QueryNodeException	if something goes wrong during the query node processing

PreProcessNode(IQueryNode)

This method is invoked for every node when walking down the tree.

Declaration

protected override IQueryNode PreProcessNode(IQueryNode node)

Parameters

Type	Name	Description
IQueryNode	node	the query node to be pre-processed

Returns

Type	Description
IQueryNode	a query node

Overrides

QueryNodeProcessor.PreProcessNode(IQueryNode)

Exceptions

Type	Condition
QueryNodeException	if something goes wrong during the query node processing

Process(IQueryNode)

Processes a query node tree. It may return the same or another query tree. I should never return null.

Declaration

public override IQueryNode Process(IQueryNode queryTree)

Parameters

Type	Name	Description
IQueryNode	queryTree	tree root node

Returns

Type	Description
IQueryNode	the processed query tree

Overrides

QueryNodeProcessor.Process(IQueryNode)

SetChildrenOrder(IList<IQueryNode>)

This method is invoked for every node that has at least on child. It's invoked right before PostProcessNode(IQueryNode) is invoked.

Declaration

protected override IList<IQueryNode> SetChildrenOrder(IList<IQueryNode> children)

Parameters

Type	Name	Description
IList<IQueryNode>	children	the list containing all current node's children

Returns

Type	Description
IList<IQueryNode>	a new list containing all children that should be set to the current node

Overrides

QueryNodeProcessor.SetChildrenOrder(IList<IQueryNode>)

Exceptions

Type	Condition
QueryNodeException	if something goes wrong during the query node processing

Implements

IQueryNodeProcessor