Class MultiFieldQueryNodeProcessor
This processor is used to expand terms so the query looks for the same term in different fields. It also boosts a query based on its field.
This processor looks for every IFieldableNode contained in the query node tree. If a IFieldableNode is found, it checks if there is a MULTI_FIELDS defined in the QueryConfigHandler. If there is, the IFieldableNode is cloned N times and the clones are added to a BooleanQueryNode together with the original node. N is defined by the number of fields that it will be expanded to. The BooleanQueryNode is returned.Implements
Inherited Members
Namespace: Lucene.Net.QueryParsers.Flexible.Standard.Processors
Assembly: Lucene.Net.QueryParser.dll
Syntax
public class MultiFieldQueryNodeProcessor : QueryNodeProcessor, IQueryNodeProcessorConstructors
MultiFieldQueryNodeProcessor()
This processor is used to expand terms so the query looks for the same term in different fields. It also boosts a query based on its field.
This processor looks for every IFieldableNode contained in the query node tree. If a IFieldableNode is found, it checks if there is a MULTI_FIELDS defined in the QueryConfigHandler. If there is, the IFieldableNode is cloned N times and the clones are added to a BooleanQueryNode together with the original node. N is defined by the number of fields that it will be expanded to. The BooleanQueryNode is returned.Declaration
public MultiFieldQueryNodeProcessor()See Also
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
Exceptions
| Type | Condition |
|---|---|
| QueryNodeException | if something goes wrong during the query node processing |
See Also
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
Exceptions
| Type | Condition |
|---|---|
| QueryNodeException | if something goes wrong during the query node processing |
See Also
ProcessChildren(IQueryNode)
This method is called every time a child is processed.
Declaration
protected override void ProcessChildren(IQueryNode queryTree)Parameters
| Type | Name | Description |
|---|---|---|
| IQueryNode | queryTree | the query node child to be processed |
Overrides
Exceptions
| Type | Condition |
|---|---|
| QueryNodeException | if something goes wrong during the query node processing |
See Also
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
Exceptions
| Type | Condition |
|---|---|
| QueryNodeException | if something goes wrong during the query node processing |