Package uk.ac.gla.terrier.structures

Provides the classes that implement the data structures used for retrieval with the Terrier platform.

See:
Description

Interface Summary

Closeable

Marks an index structure class that can be closed.

Class Summary

BlockDirectIndex	Extended direct index that saves both block and field information about the terms that appear in a document.
BlockDirectIndexInputStream	This class reads the block field direct index structure sequentially, as an input stream.
BlockInvertedIndex	This class implements the block field inverted index for performing retrieval.
BlockLexicon	A lexicon class that saves the number of different blocks a term appears in.
BlockLexiconInputStream	An input stream for accessing sequentially the entries of a block lexicon.
BlockLexiconOutputStream	An output stream for writing the lexicon to a file sequentially.
CollectionStatistics	This class provides basic statistics for the indexed collection of documents, such as the average length of documents, or the total number of documents in the collection.
DirectIndex	A class that implements the direct index and saves information about whether a term appears in one of the specified fields.
DirectIndexInputStream	This class reads the direct index structure, sequentially, as an input stream.
DocumentIndex	This class provides an interface for accessing the document index file.
DocumentIndexEncoded	A document index class which reads the .docid file and keeps its contents in a array of bytes in memory.
DocumentIndexInMemory	This class extends DocumentIndex, but instead of accessing the disk file each time, the data are loaded into memory, in order to decrease access time.
DocumentIndexInputStream	This class provides access to the document index file sequentially, as a stream.
DocumentIndexOutputStream	A DocumentIndexOutputStream.
ExpansionTerms	This class implements a data structure of terms in the top-retrieved documents.
FilePosition	Models a position within a file as the offset in bytes and the offset in bits in that byte.
Index	This class encapsulates all the Indexes at retrieval time.
InvertedIndex	This class implements the inverted index for performing retrieval, with field information optionally.
Lexicon	The class that implements the lexicon structure.
LexiconEntry	Contains all the information about one entry in the Lexicon.
LexiconInputStream	This class implements an input stream for the lexicon structure.
LexiconOutputStream	This class implements an output stream for the lexicon structure.
Query	Deprecated.
SingleLineTRECQuery	This class can be used to extract batch queries from a simpler format than the TREC format.
TRECQuery	This class is used for reading the queries from TREC topic files.
UTFBlockLexicon	A lexicon class that saves the number of different blocks a term appears in, using UTF encoding of Strings.
UTFBlockLexiconInputStream	An input stream for accessing sequentially the entries of a block lexicon.
UTFBlockLexiconOutputStream	An output stream for writing the lexicon to a file sequentially.
UTFLexicon	The class that implements the lexicon structure.
UTFLexiconInputStream	This class implements an input stream for the lexicon structure.
UTFLexiconOutputStream	This class implements an output stream for the lexicon structure.

Package uk.ac.gla.terrier.structures Description

Provides the classes that implement the data structures used for retrieval with the Terrier platform.

These include the implementations of the inverted index, the direct index, the lexicon and the document index.