Class QueryNodeProcessor

This is a default implementation for the IQueryNodeProcessor interface, it's an abstract class, so it should be extended by classes that want to process a IQueryNode tree.

This class process IQueryNodes from left to right in the tree. While it's walking down the tree, for every node, PreProcessNode(IQueryNode) is invoked. After a node's children are processed, PostProcessNode(IQueryNode) is invoked for that node. SetChildrenOrder(IList<IQueryNode>) is invoked before PostProcessNode(IQueryNode) only if the node has at least one child, in SetChildrenOrder(IList<IQueryNode>) the implementor might redefine the children order or remove any children from the children list.

Here is an example about how it process the nodes: 

     a
    / \
   b   e
  / \
 c   d

Here is the order the methods would be invoked for the tree described above: 

    PreProcessNode( a );
    PreProcessNode( b );
    PreProcessNode( c );
    PostProcessNode( c );
    PreProcessNode( d );
    PostProcessNode( d );
    SetChildrenOrder( bChildrenList );
    PostProcessNode( b );
    PreProcessNode( e );
    PostProcessNode( e );
    SetChildrenOrder( aChildrenList );
    PostProcessNode( a )
Inheritance
System.Object
QueryNodeProcessor
NoChildOptimizationQueryNodeProcessor
RemoveDeletedQueryNodesProcessor
BooleanModifiersQueryNodeProcessor
AllowLeadingWildcardProcessor
AnalyzerQueryNodeProcessor
BooleanSingleChildOptimizationQueryNodeProcessor
BoostQueryNodeProcessor
DefaultPhraseSlopQueryNodeProcessor
FuzzyQueryNodeProcessor
LowercaseExpandedTermsQueryNodeProcessor
MatchAllDocsQueryNodeProcessor
MultiFieldQueryNodeProcessor
MultiTermRewriteMethodProcessor
NumericQueryNodeProcessor
NumericRangeQueryNodeProcessor
OpenRangeQueryNodeProcessor
PhraseSlopQueryNodeProcessor
RemoveEmptyNonLeafQueryNodeProcessor
TermRangeQueryNodeProcessor
WildcardQueryNodeProcessor
Implements
Inherited Members
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
System.Object.ToString()
Namespace: Lucene.Net.QueryParsers.Flexible.Core.Processors
Assembly: Lucene.Net.QueryParser.dll
Syntax
public abstract class QueryNodeProcessor : IQueryNodeProcessor

Constructors

| Improve this Doc View Source

QueryNodeProcessor()

Declaration
public QueryNodeProcessor()
| Improve this Doc View Source

QueryNodeProcessor(QueryConfigHandler)

Declaration
public QueryNodeProcessor(QueryConfigHandler queryConfigHandler)
Parameters
Type Name Description
QueryConfigHandler queryConfigHandler

Methods

| Improve this Doc View Source

GetQueryConfigHandler()

For reference about this method check: GetQueryConfigHandler().

Declaration
public virtual QueryConfigHandler GetQueryConfigHandler()
Returns
Type Description
QueryConfigHandler

QueryConfigHandler the query configuration handler to be set.
See Also
| Improve this Doc View Source

PostProcessNode(IQueryNode)

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

Declaration
protected abstract 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
Exceptions
Type Condition
QueryNodeException

if something goes wrong during the query node processing
| Improve this Doc View Source

PreProcessNode(IQueryNode)

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

Declaration
protected abstract IQueryNode PreProcessNode(IQueryNode node)
Parameters
Type Name Description
IQueryNode node

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

a query node
Exceptions
Type Condition
QueryNodeException

if something goes wrong during the query node processing
| Improve this Doc View Source

Process(IQueryNode)

Declaration
public virtual IQueryNode Process(IQueryNode queryTree)
Parameters
Type Name Description
IQueryNode queryTree
Returns
Type Description
IQueryNode
| Improve this Doc View Source

ProcessChildren(IQueryNode)

This method is called every time a child is processed.

Declaration
protected virtual void ProcessChildren(IQueryNode queryTree)
Parameters
Type Name Description
IQueryNode queryTree

the query node child to be processed
Exceptions
Type Condition
QueryNodeException

if something goes wrong during the query node processing
| Improve this Doc View Source

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 abstract IList<IQueryNode> SetChildrenOrder(IList<IQueryNode> children)
Parameters
Type Name Description
System.Collections.Generic.IList<IQueryNode> children

the list containing all current node's children
Returns
Type Description
System.Collections.Generic.IList<IQueryNode>

a new list containing all children that should be set to the current node
Exceptions
Type Condition
QueryNodeException

if something goes wrong during the query node processing
| Improve this Doc View Source

SetQueryConfigHandler(QueryConfigHandler)

For reference about this method check: SetQueryConfigHandler(QueryConfigHandler).

Declaration
public virtual void SetQueryConfigHandler(QueryConfigHandler queryConfigHandler)
Parameters
Type Name Description
QueryConfigHandler queryConfigHandler

the query configuration handler to be set.
See Also

Implements

See Also