com.gigaspaces.internal.query

Class NullValueIndexScanner

java.lang.Object

com.gigaspaces.internal.query.AbstractQueryIndex

com.gigaspaces.internal.query.NullValueIndexScanner

All Implemented Interfaces:

IQueryIndexScanner, Externalizable, Serializable

public class NullValueIndexScanner
extends AbstractQueryIndex

Scans only the entries that have a null index value

Since:

7.1

Author:

anna

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface com.gigaspaces.internal.query.IQueryIndexScanner

IQueryIndexScanner.ResultIndicator

Field Summary

Fields inherited from interface com.gigaspaces.internal.query.IQueryIndexScanner

RESULT_IGNORE_INDEX, RESULT_NO_MATCH

Constructor Summary

Constructors

Constructor and Description
NullValueIndexScanner()
NullValueIndexScanner(String indexName)

Method Summary

Modifier and Type	Method and Description
protected IObjectsList	getEntriesByIndex(Context context, TypeData typeData, TypeDataIndex<Object> index, boolean fifoGroupsScan)
Object	getIndexValue() The value of the index - objects are indexed and stored according to specific index value.
protected boolean	hasIndexValue()
boolean	requiresOrderedIndex() Returns true if this index scanner requires an ordered index
boolean	requiresValueForIndexSearch()
boolean	supportsFifoOrder() equality matching preserves fifo order
boolean	supportsTemplateIndex() Returns true if this index scanner supports template indexing

Methods inherited from class com.gigaspaces.internal.query.AbstractQueryIndex

getIndexedEntriesByType, getIndexName, isUidsScanner, readExternal, writeExternal

Methods inherited from class java.lang.Object

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

Constructor Detail

NullValueIndexScanner

public NullValueIndexScanner()

NullValueIndexScanner

public NullValueIndexScanner(String indexName)

Parameters:

indexName -

indexValue -

Method Detail

getEntriesByIndex

protected IObjectsList getEntriesByIndex(Context context,
                                         TypeData typeData,
                                         TypeDataIndex<Object> index,
                                         boolean fifoGroupsScan)

Specified by:

getEntriesByIndex in class AbstractQueryIndex

requiresOrderedIndex

public boolean requiresOrderedIndex()

Description copied from interface: IQueryIndexScanner

Returns true if this index scanner requires an ordered index

hasIndexValue

protected boolean hasIndexValue()

Specified by:

hasIndexValue in class AbstractQueryIndex

getIndexValue

public Object getIndexValue()

Description copied from interface: IQueryIndexScanner

The value of the index - objects are indexed and stored according to specific index value. This value will be used to search the index structure for entries that match this value .

supportsFifoOrder

public boolean supportsFifoOrder()

equality matching preserves fifo order

Specified by:

supportsFifoOrder in interface IQueryIndexScanner

Overrides:

supportsFifoOrder in class AbstractQueryIndex

supportsTemplateIndex

public boolean supportsTemplateIndex()

Description copied from interface: IQueryIndexScanner

Returns true if this index scanner supports template indexing

requiresValueForIndexSearch

public boolean requiresValueForIndexSearch()

Overrides:

requiresValueForIndexSearch in class AbstractQueryIndex