Class AllowLeadingWildcardProcessor
This processor verifies if ALLOW_LEADING_WILDCARD is defined in the QueryConfigHandler. If it is and leading wildcard is not allowed, it looks for every WildcardQueryNode contained in the query node tree and throws an exception if any of them has a leading wildcard ('*' or '?').
Implements
Inherited Members
Namespace: Lucene.Net.QueryParsers.Flexible.Standard.Processors
Assembly: Lucene.Net.QueryParser.dll
Syntax
public class AllowLeadingWildcardProcessor : QueryNodeProcessor, IQueryNodeProcessorConstructors
AllowLeadingWildcardProcessor()
This processor verifies if ALLOW_LEADING_WILDCARD is defined in the QueryConfigHandler. If it is and leading wildcard is not allowed, it looks for every WildcardQueryNode contained in the query node tree and throws an exception if any of them has a leading wildcard ('*' or '?').
Declaration
public AllowLeadingWildcardProcessor()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
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
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 |