org.apache.lucene.queryParser.standard.processors
Class NumericRangeQueryNodeProcessor

java.lang.Object
  org.apache.lucene.queryParser.core.processors.QueryNodeProcessorImpl
      org.apache.lucene.queryParser.standard.processors.NumericRangeQueryNodeProcessor

All Implemented Interfaces:

QueryNodeProcessor

public class NumericRangeQueryNodeProcessor
extends QueryNodeProcessorImpl

This processor is used to convert ParametricRangeQueryNodes to NumericRangeQueryNodes. It looks for StandardQueryConfigHandler.ConfigurationKeys.NUMERIC_CONFIG set in the FieldConfig of every ParametricRangeQueryNode found. If StandardQueryConfigHandler.ConfigurationKeys.NUMERIC_CONFIG is found, it considers that ParametricRangeQueryNode to be a numeric range query and convert it to NumericRangeQueryNode.

See Also:

StandardQueryConfigHandler.ConfigurationKeys.NUMERIC_CONFIG, ParametricRangeQueryNode, NumericConfig, NumericRangeQueryNode

Constructor Summary

NumericRangeQueryNodeProcessor()
Constructs an empty NumericRangeQueryNode object.

Method Summary

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.
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

getQueryConfigHandler, process, processChildren, setQueryConfigHandler

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

NumericRangeQueryNodeProcessor

public NumericRangeQueryNodeProcessor()

Constructs an empty NumericRangeQueryNode object.

Method Detail

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