org.apache.lucene.queryParser.standard.processors
Class BoostQueryNodeProcessor
java.lang.Object
org.apache.lucene.queryParser.core.processors.QueryNodeProcessorImpl
org.apache.lucene.queryParser.standard.processors.BoostQueryNodeProcessor
- All Implemented Interfaces:
- QueryNodeProcessor
public class BoostQueryNodeProcessor
- extends QueryNodeProcessorImpl
This processor iterates the query node tree looking for every
FieldableNode
that has the attribute BoostAttribute
in its
config. If there is, the boost is applied to that FieldableNode
.
- See Also:
BoostAttribute
,
QueryConfigHandler
,
FieldableNode
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
BoostQueryNodeProcessor
public BoostQueryNodeProcessor()
postProcessNode
protected QueryNode postProcessNode(QueryNode node)
throws QueryNodeException
- Description copied from class:
QueryNodeProcessorImpl
- This method is invoked for every node when walking up the tree.
- Specified by:
postProcessNode
in class QueryNodeProcessorImpl
- Parameters:
node
- node the query node to be post-processed
- Returns:
- a query node
- Throws:
QueryNodeException
- if something goes wrong during the query node processing
preProcessNode
protected QueryNode preProcessNode(QueryNode node)
throws QueryNodeException
- Description copied from class:
QueryNodeProcessorImpl
- This method is invoked for every node when walking down the tree.
- Specified by:
preProcessNode
in class QueryNodeProcessorImpl
- Parameters:
node
- the query node to be pre-processed
- Returns:
- a query node
- Throws:
QueryNodeException
- if something goes wrong during the query node processing
setChildrenOrder
protected List<QueryNode> setChildrenOrder(List<QueryNode> children)
throws QueryNodeException
- Description copied from class:
QueryNodeProcessorImpl
- This method is invoked for every node that has at least on child. It's
invoked right before
QueryNodeProcessorImpl.postProcessNode(QueryNode)
is invoked.
- Specified by:
setChildrenOrder
in class QueryNodeProcessorImpl
- Parameters:
children
- the list containing all current node's children
- Returns:
- a new list containing all children that should be set to the
current node
- Throws:
QueryNodeException
- if something goes wrong during the query node processing
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