X-Git-Url: https://git.mdrn.pl/pylucene.git/blobdiff_plain/a2e61f0c04805cfcb8706176758d1283c7e3a55c..aaeed5504b982cf3545252ab528713250aa33eed:/lucene-java-3.5.0/lucene/contrib/xml-query-parser/src/test/org/apache/lucene/xmlparser/CachedFilter.xml

diff --git a/lucene-java-3.5.0/lucene/contrib/xml-query-parser/src/test/org/apache/lucene/xmlparser/CachedFilter.xml b/lucene-java-3.5.0/lucene/contrib/xml-query-parser/src/test/org/apache/lucene/xmlparser/CachedFilter.xml
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+++ b/lucene-java-3.5.0/lucene/contrib/xml-query-parser/src/test/org/apache/lucene/xmlparser/CachedFilter.xml
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+<?xml version="1.0" encoding="UTF-8"?>
+<FilteredQuery>
+	<Query>
+		<BooleanQuery fieldName="contents">
+			<Clause occurs="should">
+				<TermQuery>merger</TermQuery>
+			</Clause>
+			<Clause occurs="mustnot">
+				<TermQuery >sumitomo</TermQuery>		
+			</Clause>
+		</BooleanQuery>
+	</Query>
+	
+	<Filter>
+		<!--
+			CachedFilter elements can contain any Query or Filter. 
+			CachedFilters are cached in an LRU Cache keyed on the contained query/filter object. 
+			Using this will speed up overall performance for repeated uses of the same expensive 
+			query/filter. The sorts of queries likely to benefit from caching need not necessarily be 
+			complex - e.g. simple TermQuerys with a large DF (document frequency) can be expensive
+			on large indexes. A good example of this might be a term query on a field with only 2 possible 
+			values - "true" or "false". In a large index, querying or filtering on this field requires 
+			reading millions of document ids from disk which can more usefully be cached as a 
+			QueryFilter bitset.
+			
+			For Queries/Filters to be cached and reused the object must implement hashcode and
+			equals methods correctly so that duplicate queries/filters can be detected in the cache.
+			
+			The CoreParser.maxNumCachedFilters property can be used to control the size
+			of the LRU Cache established during the construction of CoreParser instances.
+			-->
+		<CachedFilter>
+			<!-- Example query to be cached for fast, repeated use -->
+			<TermQuery fieldName="contents">bank</TermQuery> 
+			<!-- Alternatively, a filter object can be cached ....
+				<RangeFilter fieldName="date" lowerTerm="19870409" upperTerm="19870412"/>
+			-->				
+		</CachedFilter>
+	</Filter>
+	
+</FilteredQuery>