org.apache.lucene.facet.util
Class OrdinalMappingAtomicReader
java.lang.Object
org.apache.lucene.index.IndexReader
org.apache.lucene.index.AtomicReader
org.apache.lucene.index.FilterAtomicReader
org.apache.lucene.facet.util.OrdinalMappingAtomicReader
- All Implemented Interfaces:
- Closeable
public class OrdinalMappingAtomicReader
- extends FilterAtomicReader
A FilterAtomicReader
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<AtomicReaderContext> leaves = reader.leaves();
AtomicReader wrappedLeaves[] = new AtomicReader[leaves.size()];
for (int i = 0; i < leaves.size(); i++) {
wrappedLeaves[i] = new OrdinalMappingAtomicReader(leaves.get(i).reader(), ordmap);
}
writer.addIndexes(new MultiReader(wrappedLeaves));
writer.commit();
- WARNING: This API is experimental and might change in incompatible ways in the next release.
Methods inherited from class org.apache.lucene.index.FilterAtomicReader |
doClose, document, fields, getCombinedCoreAndDeletesKey, getCoreCacheKey, getFieldInfos, getLiveDocs, getNormValues, getNumericDocValues, getSortedDocValues, getSortedSetDocValues, getTermVectors, hasDeletions, maxDoc, numDocs, toString |
Methods inherited from class org.apache.lucene.index.IndexReader |
addReaderClosedListener, close, decRef, document, document, ensureOpen, equals, getRefCount, getTermVector, hashCode, incRef, leaves, numDeletedDocs, open, open, open, open, open, registerParentReader, removeReaderClosedListener, tryIncRef |
OrdinalMappingAtomicReader
public OrdinalMappingAtomicReader(AtomicReader in,
int[] ordinalMap)
- Wraps an AtomicReader, mapping ordinals according to the ordinalMap.
Calls
OrdinalMappingAtomicReader(in, ordinalMap, new DefaultFacetIndexingParams())
OrdinalMappingAtomicReader
public OrdinalMappingAtomicReader(AtomicReader in,
int[] ordinalMap,
FacetIndexingParams indexingParams)
- Wraps an AtomicReader, mapping ordinals according to the ordinalMap,
using the provided indexingParams.
getBinaryDocValues
public BinaryDocValues getBinaryDocValues(String field)
throws IOException
- Overrides:
getBinaryDocValues
in class FilterAtomicReader
- Throws:
IOException
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