Lucene example source code file (NestedBooleanQuery.xml)

This example Lucene source code file (NestedBooleanQuery.xml) 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

all, booleanquery, booleanquery, booleanquerybuilder, clause, clause, termquery, termquery, this, this, utf-8, xml

The Lucene NestedBooleanQuery.xml source code

<?xml version="1.0" encoding="UTF-8"?>
<!--
	This query was added to demonstrate nested boolean queries - there
	was a bug in the XML parser which added ALL child <Clause> tags to 
	the top level tags ie. took child and grandchild elements instead
	of just child elements. This was due to the use of the 
	Element.getElementsByTagName() call in BooleanQueryBuilder
-->	
<BooleanQuery fieldName="contents">	
	<Clause occurs="should">
		<BooleanQuery fieldName="contents">
			<Clause occurs="must">
				<TermQuery>doesNotExistButShouldBeOKBecauseOtherClauseExists
			</Clause>
		</BooleanQuery>
	</Clause>
	<Clause occurs="should">
		<TermQuery>bank
	</Clause>
</BooleanQuery>