Module org.apache.lucene.facet
Package org.apache.lucene.facet.taxonomy
Class OrdinalMappingLeafReader
java.lang.Object
org.apache.lucene.index.IndexReader
org.apache.lucene.index.LeafReader
org.apache.lucene.index.FilterLeafReader
org.apache.lucene.facet.taxonomy.OrdinalMappingLeafReader
- All Implemented Interfaces:
Closeable
,AutoCloseable
A
FilterLeafReader
for updating facets ordinal references, based
on an ordinal map. You should use this code in conjunction with merging taxonomies - after you
merge taxonomies, you receive an DirectoryTaxonomyWriter.OrdinalMap
which maps the 'old' ordinals to the 'new'
ones. You can use that map to re-map the doc values which contain the facets information
(ordinals) either before or while merging the indexes.
For re-mapping the ordinals during index merge, do the following:
// merge the old taxonomy with the new one. OrdinalMap map = new MemoryOrdinalMap(); DirectoryTaxonomyWriter.addTaxonomy(srcTaxoDir, map); int[] ordmap = map.getMap(); // Add the index and re-map ordinals on the go DirectoryReader reader = DirectoryReader.open(oldDir); IndexWriterConfig conf = new IndexWriterConfig(VER, ANALYZER); IndexWriter writer = new IndexWriter(newDir, conf); List<LeafReaderContext> leaves = reader.leaves(); LeafReader wrappedLeaves[] = new LeafReader[leaves.size()]; for (int i = 0; i < leaves.size(); i++) { wrappedLeaves[i] = new OrdinalMappingLeafReader(leaves.get(i).reader(), ordmap); } writer.addIndexes(new MultiReader(wrappedLeaves)); writer.commit();
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Nested Class Summary
Nested ClassesModifier and TypeClassDescriptionprivate class
Nested classes/interfaces inherited from class org.apache.lucene.index.FilterLeafReader
FilterLeafReader.FilterFields, FilterLeafReader.FilterPostingsEnum, FilterLeafReader.FilterTerms, FilterLeafReader.FilterTermsEnum
Nested classes/interfaces inherited from class org.apache.lucene.index.IndexReader
IndexReader.CacheHelper, IndexReader.CacheKey, IndexReader.ClosedListener
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Field Summary
FieldsModifier and TypeFieldDescriptionprivate final int[]
Fields inherited from class org.apache.lucene.index.FilterLeafReader
in
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Constructor Summary
ConstructorsConstructorDescriptionOrdinalMappingLeafReader
(LeafReader in, int[] ordinalMap, FacetsConfig srcConfig) Wraps an LeafReader, mapping ordinals according to the ordinalMap, using the providedFacetsConfig
which was used to build the wrapped reader. -
Method Summary
Modifier and TypeMethodDescriptionOptional method: Return aIndexReader.CacheHelper
that can be used to cache based on the content of this leaf regardless of deletions.Optional method: Return aIndexReader.CacheHelper
that can be used to cache based on the content of this reader.getSortedNumericDocValues
(String field) ReturnsSortedNumericDocValues
for this field, or null if noSortedNumericDocValues
were indexed for this field.Methods inherited from class org.apache.lucene.index.FilterLeafReader
checkIntegrity, doClose, getBinaryDocValues, getByteVectorValues, getDelegate, getDocValuesSkipper, getFieldInfos, getFloatVectorValues, getLiveDocs, getMetaData, getNormValues, getNumericDocValues, getPointValues, getSortedDocValues, getSortedSetDocValues, maxDoc, numDocs, searchNearestVectors, searchNearestVectors, storedFields, terms, termVectors, toString, unwrap
Methods inherited from class org.apache.lucene.index.LeafReader
docFreq, getContext, getDocCount, getSumDocFreq, getSumTotalTermFreq, postings, postings, searchNearestVectors, searchNearestVectors, totalTermFreq
Methods inherited from class org.apache.lucene.index.IndexReader
close, decRef, ensureOpen, equals, getRefCount, hasDeletions, hashCode, incRef, leaves, notifyReaderClosedListeners, numDeletedDocs, registerParentReader, tryIncRef
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Field Details
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ordinalMap
private final int[] ordinalMap -
facetFields
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Constructor Details
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OrdinalMappingLeafReader
Wraps an LeafReader, mapping ordinals according to the ordinalMap, using the providedFacetsConfig
which was used to build the wrapped reader.
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Method Details
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getSortedNumericDocValues
Description copied from class:LeafReader
ReturnsSortedNumericDocValues
for this field, or null if noSortedNumericDocValues
were indexed for this field. The returned instance should only be used by a single thread.- Overrides:
getSortedNumericDocValues
in classFilterLeafReader
- Throws:
IOException
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getCoreCacheHelper
Description copied from class:LeafReader
Optional method: Return aIndexReader.CacheHelper
that can be used to cache based on the content of this leaf regardless of deletions. Two readers that have the same data but different sets of deleted documents or doc values updates may be considered equal. Consider usingIndexReader.getReaderCacheHelper()
if you need deletions or dv updates to be taken into account.A return value of
null
indicates that this reader is not suited for caching, which is typically the case for short-lived wrappers that alter the content of the wrapped leaf reader.- Specified by:
getCoreCacheHelper
in classLeafReader
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getReaderCacheHelper
Description copied from class:IndexReader
Optional method: Return aIndexReader.CacheHelper
that can be used to cache based on the content of this reader. Two readers that have different data or different sets of deleted documents will be considered different.A return value of
null
indicates that this reader is not suited for caching, which is typically the case for short-lived wrappers that alter the content of the wrapped reader.- Specified by:
getReaderCacheHelper
in classIndexReader
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