Lucene example source code file (query.xsl)

This example Lucene source code file (query.xsl) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Lucene tags/keywords

booleanfilter, booleanquery, cachedfilter, cachedfilter, clause, clause, constantscorequery, constantscorequery, license, license, north, see, termsfilter, userquery

The Lucene query.xsl source code

<?xml version="1.0" encoding="ISO-8859-1"?>
<!--
 Licensed to the Apache Software Foundation (ASF) under one or more
 contributor license agreements.  See the NOTICE file distributed with
 this work for additional information regarding copyright ownership.
 The ASF licenses this file to You under the Apache License, Version 2.0
 (the "License"); you may not use this file except in compliance with
 the License.  You may obtain a copy of the License at

     http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
-->
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="/Document">
<BooleanQuery>
	<!-- Clause if user selects a preference for type of job - apply choice of 
	     permanent/contract filter and cache -->
	<xsl:if test="type">
	    <Clause occurs="must">
	    	<ConstantScoreQuery>
	    	   <CachedFilter>
	    	     	<TermsFilter fieldName="type">
	    	   </CachedFilter>
	    	 </ConstantScoreQuery>
	   </Clause>
	</xsl:if>
		
	<!-- Use standard Lucene query parser for any job description input -->
	<xsl:if test="description">
		<Clause occurs="must">
			<UserQuery fieldName="description">
		</Clause>
	</xsl:if>      
	
	<!-- If any of the location fields are set OR them ALL in a Boolean filter and cache individual filters -->
	<xsl:if test="South|North|East|West">
		<Clause occurs="must">
			<ConstantScoreQuery>
				<BooleanFilter>
					<xsl:for-each select="South|North|East|West">
					<Clause occurs="should">
						<CachedFilter>
							<TermsFilter fieldName="location">
						</CachedFilter>
				  	</Clause>
					</xsl:for-each>					
				</BooleanFilter>
	     		</ConstantScoreQuery>
	 	</Clause>
	</xsl:if>   	
	
	<!-- Use XSL functions to split and zero pad salary range value -->
	<xsl:if test="salaryRange">
		<Clause occurs="must">
			<ConstantScoreQuery>
				<RangeFilter fieldName="salary" >
					<xsl:attribute name="lowerTerm">
						<xsl:value-of select='format-number( substring-before(salaryRange,"-"), "000" )' />
					</xsl:attribute> 
					<xsl:attribute name="upperTerm">
						<xsl:value-of select='format-number( substring-after(salaryRange,"-"), "000" )' />
					</xsl:attribute> 
				</RangeFilter>
			</ConstantScoreQuery>
		</Clause>
	</xsl:if>	
</BooleanQuery>
</xsl:template>
</xsl:stylesheet>