pitt.search.semanticvectors
Class VectorStoreReaderLucene

java.lang.Object
  pitt.search.semanticvectors.VectorStoreReaderLucene

All Implemented Interfaces:

CloseableVectorStore, VectorStore

public class VectorStoreReaderLucene
extends java.lang.Object
implements CloseableVectorStore

This class provides methods for reading a VectorStore from disk.

The serialization currently presumes that the object (in the ObjectVectors) should be serialized as a String.

The implementation uses Lucene's I/O package, which proved much faster than the native java.io.DataOutputStream

See Also:

ObjectVector

Nested Class Summary

class

VectorStoreReaderLucene.VectorEnumeration Implements the hasMoreElements() and nextElement() methods to give Enumeration interface from store on disk.

Constructor Summary

VectorStoreReaderLucene(java.lang.String vectorFileName)

Method Summary

void	close() Release all filesystem or other resources that aren't automatically garbage collected.
org.apache.lucene.store.FSDirectory	fsDirectory()
java.util.Enumeration	getAllVectors()
int	getNumVectors() Trivial (costly) implementation of getNumVectors that iterates and counts vectors.
float[]	getVector(java.lang.Object desiredObject) Given an object, get its corresponding vector This implementation only works for string objects so far

Methods inherited from class java.lang.Object

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

Constructor Detail

VectorStoreReaderLucene

public VectorStoreReaderLucene(java.lang.String vectorFileName)
                        throws java.io.IOException

Throws:

java.io.IOException

Method Detail

fsDirectory

public org.apache.lucene.store.FSDirectory fsDirectory()

close

public void close()

Description copied from interface: CloseableVectorStore

Release all filesystem or other resources that aren't automatically garbage collected.

Specified by:

close in interface CloseableVectorStore

getAllVectors

public java.util.Enumeration getAllVectors()

Specified by:

getAllVectors in interface VectorStore

Returns:

an enumeration of all the object vectors in the store.

getVector

public float[] getVector(java.lang.Object desiredObject)

Given an object, get its corresponding vector
This implementation only works for string objects so far

Specified by:

getVector in interface VectorStore

Parameters:

desiredObject - - the string you're searching for

Returns:

vector from the VectorStore, or null if not found.

getNumVectors

public int getNumVectors()

Trivial (costly) implementation of getNumVectors that iterates and counts vectors.

Specified by:

getNumVectors in interface VectorStore

Returns:

a count of the number of vectors in the store.