Class AnalyzerQueryNodeProcessor

This processor verifies if ANALYZER is defined in the QueryConfigHandler. If it is and the analyzer is not null, it looks for every FieldQueryNode that is not WildcardQueryNode, FuzzyQueryNode or IRangeQueryNode contained in the query node tree, then it applies the analyzer to that FieldQueryNode object.

If the analyzer return only one term, the returned term is set to the FieldQueryNode and it's returned.

If the analyzer return more than one term, a TokenizedPhraseQueryNode or MultiPhraseQueryNode is created, whether there is one or more terms at the same position, and it's returned.

If no term is returned by the analyzer a NoTokenFoundQueryNode object is returned.

Inheritance

object

QueryNodeProcessor

AnalyzerQueryNodeProcessor

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.Standard.Processors

Assembly: Lucene.Net.QueryParser.dll

Syntax

public class AnalyzerQueryNodeProcessor : QueryNodeProcessor, IQueryNodeProcessor

Constructors

AnalyzerQueryNodeProcessor()

This processor verifies if ANALYZER is defined in the QueryConfigHandler. If it is and the analyzer is not null, it looks for every FieldQueryNode that is not WildcardQueryNode, FuzzyQueryNode or IRangeQueryNode contained in the query node tree, then it applies the analyzer to that FieldQueryNode object.

If the analyzer return only one term, the returned term is set to the FieldQueryNode and it's returned.

If the analyzer return more than one term, a TokenizedPhraseQueryNode or MultiPhraseQueryNode is created, whether there is one or more terms at the same position, and it's returned.

If no term is returned by the analyzer a NoTokenFoundQueryNode object is returned.

Declaration

public AnalyzerQueryNodeProcessor()

See Also

ANALYZER

Analyzer

TokenStream

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

See Also

ANALYZER

Analyzer

TokenStream

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

See Also

ANALYZER

Analyzer

TokenStream

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)

See Also

ANALYZER

Analyzer

TokenStream

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

See Also

ANALYZER

Analyzer

TokenStream

Implements

IQueryNodeProcessor

See Also

ANALYZER

Analyzer

TokenStream