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java.lang.Object org.apache.lucene.queryParser.core.processors.QueryNodeProcessorImpl org.apache.lucene.queryParser.core.processors.RemoveDeletedQueryNodesProcessor
public 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.
Constructor Summary | |
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RemoveDeletedQueryNodesProcessor()
|
Method Summary | |
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protected QueryNode |
postProcessNode(QueryNode node)
This method is invoked for every node when walking up the tree. |
protected QueryNode |
preProcessNode(QueryNode node)
This method is invoked for every node when walking down the tree. |
QueryNode |
process(QueryNode queryTree)
Processes a query node tree. |
protected List<QueryNode> |
setChildrenOrder(List<QueryNode> children)
This method is invoked for every node that has at least on child. |
Methods inherited from class org.apache.lucene.queryParser.core.processors.QueryNodeProcessorImpl |
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getQueryConfigHandler, processChildren, setQueryConfigHandler |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public RemoveDeletedQueryNodesProcessor()
Method Detail |
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public QueryNode process(QueryNode queryTree) throws QueryNodeException
QueryNodeProcessor
null
.
process
in interface QueryNodeProcessor
process
in class QueryNodeProcessorImpl
queryTree
- tree root node
QueryNodeException
protected QueryNode postProcessNode(QueryNode node) throws QueryNodeException
QueryNodeProcessorImpl
postProcessNode
in class QueryNodeProcessorImpl
node
- node the query node to be post-processed
QueryNodeException
- if something goes wrong during the query node processingprotected List<QueryNode> setChildrenOrder(List<QueryNode> children) throws QueryNodeException
QueryNodeProcessorImpl
QueryNodeProcessorImpl.postProcessNode(QueryNode)
is invoked.
setChildrenOrder
in class QueryNodeProcessorImpl
children
- the list containing all current node's children
QueryNodeException
- if something goes wrong during the query node processingprotected QueryNode preProcessNode(QueryNode node) throws QueryNodeException
QueryNodeProcessorImpl
preProcessNode
in class QueryNodeProcessorImpl
node
- the query node to be pre-processed
QueryNodeException
- if something goes wrong during the query node processing
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