org.teiid.internal.core.index

Class Index

java.lang.Object

org.teiid.internal.core.index.Index

All Implemented Interfaces:

IIndex

public class Index
extends Object
implements IIndex

An Index is used to create an index on the disk, and to make queries. It uses a set of indexers and a mergeFactory. The index fills an inMemoryIndex up to it reaches a certain size, and then merges it with a main index on the disk.

The changes are only taken into account by the queries after a merge.

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	doCache
static int	MAX_FOOTPRINT Maximum size of the index in memory.
String	toString String representation of this index.

Constructor Summary

Constructors

Constructor and Description
Index(VDBResource f)

Method Summary

Modifier and Type	Method and Description
void	close() Closes the index file if open
protected BlocksIndexInput	getBlocksIndexInput()
BlocksIndexInput	getCachedInput()
int	getNumDocuments() Returns the number of documents indexed.
int	getNumWords() Returns the number of unique words indexed.
String	getResourceFileName()
void	initialize() Initialises the indexGenerator.
IQueryResult[]	query(String word) Returns the paths of the documents containing the given word.
IEntryResult[]	queryEntries(char[] prefix) Returns all entries for a given word.
IEntryResult[]	queryEntries(char[] prefix, boolean isCaseSensitive) Overloaded the method in Index to allow a user to specify if the query should be case sensitive.
IEntryResult[]	queryEntriesMatching(char[] prefix, boolean isCaseSensitive) Overloaded the method in Index to allow a user to specify if the query should be case sensitive.
IQueryResult[]	queryInDocumentNames(String word) Returns the paths of the documents whose names contain the given word.
IQueryResult[]	queryPrefix(char[] prefix) Returns the paths of the documents containing the given word prefix.
void	setCachedInput(BlocksIndexInput theCachedInput)
void	setDoCache(boolean theDoCache) sets a boolean indicating the index file will be cached and should remain open and in-memory
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

MAX_FOOTPRINT

public static final int MAX_FOOTPRINT

Maximum size of the index in memory.

See Also:

Constant Field Values

doCache

protected boolean doCache

toString

public String toString

String representation of this index.

Constructor Detail

Index

public Index(VDBResource f)
      throws IOException

Throws:

IOException

Method Detail

getNumDocuments

public int getNumDocuments()
                    throws IOException

Description copied from interface: IIndex

Returns the number of documents indexed.

Specified by:

getNumDocuments in interface IIndex

Throws:

IOException

See Also:

IIndex.getNumDocuments()

getNumWords

public int getNumWords()
                throws IOException

Description copied from interface: IIndex

Returns the number of unique words indexed.

Specified by:

getNumWords in interface IIndex

Throws:

IOException

See Also:

IIndex.getNumWords()

initialize

public void initialize()
                throws IOException

Initialises the indexGenerator.

Throws:

IOException

query

public IQueryResult[] query(String word)
                     throws IOException

Description copied from interface: IIndex

Returns the paths of the documents containing the given word.

Specified by:

query in interface IIndex

Throws:

IOException

See Also:

IIndex.query(java.lang.String)

queryEntries

public IEntryResult[] queryEntries(char[] prefix)
                            throws IOException

Description copied from interface: IIndex

Returns all entries for a given word.

Specified by:

queryEntries in interface IIndex

Throws:

IOException

queryInDocumentNames

public IQueryResult[] queryInDocumentNames(String word)
                                    throws IOException

Description copied from interface: IIndex

Returns the paths of the documents whose names contain the given word.

Specified by:

queryInDocumentNames in interface IIndex

Throws:

IOException

See Also:

IIndex.queryInDocumentNames(java.lang.String)

queryPrefix

public IQueryResult[] queryPrefix(char[] prefix)
                           throws IOException

Description copied from interface: IIndex

Returns the paths of the documents containing the given word prefix.

Specified by:

queryPrefix in interface IIndex

Throws:

IOException

See Also:

IIndex.queryPrefix(char[])

queryEntriesMatching

public IEntryResult[] queryEntriesMatching(char[] prefix,
                                           boolean isCaseSensitive)
                                    throws IOException

Overloaded the method in Index to allow a user to specify if the query should be case sensitive.

Throws:

IOException

queryEntries

public IEntryResult[] queryEntries(char[] prefix,
                                   boolean isCaseSensitive)
                            throws IOException

Overloaded the method in Index to allow a user to specify if the query should be case sensitive.

Throws:

IOException

getBlocksIndexInput

protected BlocksIndexInput getBlocksIndexInput()

close

public void close()

Description copied from interface: IIndex

Closes the index file if open

Specified by:

close in interface IIndex

toString

public String toString()

Overrides:

toString in class Object

setDoCache

public void setDoCache(boolean theDoCache)

Description copied from interface: IIndex

sets a boolean indicating the index file will be cached and should remain open and in-memory

Specified by:

setDoCache in interface IIndex

getCachedInput

public BlocksIndexInput getCachedInput()

setCachedInput

public void setCachedInput(BlocksIndexInput theCachedInput)

getResourceFileName

public String getResourceFileName()