org.apache.lucene.queryParser.standard.processors

Class ParametricRangeQueryNodeProcessor

java.lang.Object

org.apache.lucene.queryParser.core.processors.QueryNodeProcessorImpl

org.apache.lucene.queryParser.standard.processors.ParametricRangeQueryNodeProcessor

All Implemented Interfaces:

QueryNodeProcessor

public class ParametricRangeQueryNodeProcessor
extends QueryNodeProcessorImpl

This processor converts ParametricRangeQueryNode objects to RangeQueryNode objects. It reads the lower and upper bounds value from the ParametricRangeQueryNode object and try to parse their values using a DateFormat. If the values cannot be parsed to a date value, it will only create the RangeQueryNode using the non-parsed values.

If a LocaleAttribute is defined in the QueryConfigHandler it will be used to parse the date, otherwise Locale.getDefault() will be used.

If a DateResolutionAttribute is defined and the DateTools.Resolution is not null it will also be used to parse the date value.

This processor will also try to retrieve a RangeCollatorAttribute from the QueryConfigHandler. If a RangeCollatorAttribute is found and the Collator is not null, it's set on the RangeQueryNode.

See Also:

RangeCollatorAttribute, DateResolutionAttribute, LocaleAttribute, RangeQueryNode, ParametricRangeQueryNode

Constructor Summary

Constructors

Constructor and Description
ParametricRangeQueryNodeProcessor()

Method Summary

Methods

Modifier and Type	Method and Description
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

ParametricRangeQueryNodeProcessor

public ParametricRangeQueryNodeProcessor()

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