it.unimi.di.mg4j.index.cluster
Class DocumentalConcatenatedCluster

java.lang.Object
  it.unimi.di.mg4j.index.Index
      it.unimi.di.mg4j.index.cluster.IndexCluster
          it.unimi.di.mg4j.index.cluster.DocumentalCluster
              it.unimi.di.mg4j.index.cluster.DocumentalConcatenatedCluster

All Implemented Interfaces:

Serializable

public class DocumentalConcatenatedCluster
extends DocumentalCluster

A DocumentalCluster that concatenates the postings of its local indices.

This class assumes that the global document pointers returned by each index will be increasing. Using this assumption, no merge is performed; simply, when an index iterator is exhausted we look into the next one.

Author:

Alessandro Arrabito, Sebastiano Vigna

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class it.unimi.di.mg4j.index.cluster.IndexCluster

IndexCluster.PropertyKeys

Nested classes/interfaces inherited from class it.unimi.di.mg4j.index.Index

Index.EmptyIndexIterator, Index.UriKeys

Field Summary

Fields inherited from class it.unimi.di.mg4j.index.cluster.DocumentalCluster

allIndices, concatenated, DEFAULT_BUFFER_SIZE, flat, strategy

Fields inherited from class it.unimi.di.mg4j.index.cluster.IndexCluster

BLOOM_EXTENSION, localIndex, STRATEGY_DEFAULT_EXTENSION, termFilter

Fields inherited from class it.unimi.di.mg4j.index.Index

field, hasCounts, hasPayloads, hasPositions, keyIndex, maxCount, numberOfDocuments, numberOfOccurrences, numberOfPostings, numberOfTerms, payload, prefixMap, properties, singletonSet, sizes, termMap, termProcessor

Constructor Summary

DocumentalConcatenatedCluster(Index[] localIndex, DocumentalClusteringStrategy strategy, boolean flat, BloomFilter[] termFilter, int numberOfDocuments, int numberOfTerms, long numberOfPostings, long numberOfOccurences, int maxCount, Payload payload, boolean hasCounts, boolean hasPositions, TermProcessor termProcessor, String field, IntList sizes, Properties properties)

Method Summary

Methods inherited from class it.unimi.di.mg4j.index.cluster.DocumentalCluster

documents, getReader, toString

Methods inherited from class it.unimi.di.mg4j.index.cluster.IndexCluster

getInstance, keyIndex

Methods inherited from class it.unimi.di.mg4j.index.Index

documents, documents, getEmptyIndexIterator, getEmptyIndexIterator, getEmptyIndexIterator, getEmptyIndexIterator, getInstance, getInstance, getInstance, getInstance, getInstance, getReader, getTermProcessor

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

DocumentalConcatenatedCluster

public DocumentalConcatenatedCluster(Index[] localIndex,
                                     DocumentalClusteringStrategy strategy,
                                     boolean flat,
                                     BloomFilter[] termFilter,
                                     int numberOfDocuments,
                                     int numberOfTerms,
                                     long numberOfPostings,
                                     long numberOfOccurences,
                                     int maxCount,
                                     Payload payload,
                                     boolean hasCounts,
                                     boolean hasPositions,
                                     TermProcessor termProcessor,
                                     String field,
                                     IntList sizes,
                                     Properties properties)