com.orientechnologies.orient.core.index

Class OIndexOneValue

java.lang.Object

com.orientechnologies.orient.core.index.OIndexAbstract<OIdentifiable>

com.orientechnologies.orient.core.index.OIndexOneValue

All Implemented Interfaces:

OIndex<OIdentifiable>, OIndexInternal<OIdentifiable>, Comparable<OIndex<OIdentifiable>>

Direct Known Subclasses:

OIndexDictionary, OIndexUnique

public abstract class OIndexOneValue
extends OIndexAbstract<OIdentifiable>

Abstract Index implementation that allows only one value for a key.

Author:

Luca Garulli

Nested Class Summary

Nested classes/interfaces inherited from class com.orientechnologies.orient.core.index.OIndexAbstract

OIndexAbstract.IndexConfiguration, OIndexAbstract.IndexTxSnapshot

Field Summary

Fields inherited from class com.orientechnologies.orient.core.index.OIndexAbstract

apiVersion, binaryFormatVersion, clustersToIndex, CONFIG_MAP_RID, indexId, metadata, storage, valueContainerAlgorithm

Fields inherited from interface com.orientechnologies.orient.core.index.OIndexInternal

ALGORITHM, CONFIG_AUTOMATIC, CONFIG_KEYTYPE, CONFIG_NAME, CONFIG_TYPE, INDEX_DEFINITION, INDEX_DEFINITION_CLASS, INDEX_VERSION, METADATA, VALUE_CONTAINER_ALGORITHM

Fields inherited from interface com.orientechnologies.orient.core.index.OIndex

MERGE_KEYS

Constructor Summary

Constructors

Constructor and Description
OIndexOneValue(String name, String type, String algorithm, int version, OAbstractPaginatedStorage storage, String valueContainerAlgorithm, ODocument metadata, int binaryFormatVersion)

Method Summary

Modifier and Type	Method and Description
long	count(Object iKey) Counts the entries for the key.
OIndexOneValue	create(String name, OIndexDefinition indexDefinition, String clusterIndexName, Set<String> clustersToIndex, boolean rebuild, OProgressListener progressListener) Creates the index.
OIndexCursor	cursor()
OIndexCursor	descCursor()
protected OBinarySerializer	determineValueSerializer()
OIdentifiable	get(Object iKey) Gets the set of records associated with the passed key.
long	getKeySize()
long	getSize()
boolean	isUnique()
OIndexCursor	iterateEntries(Collection<?> keys, boolean ascSortOrder) Returns cursor which presents data associated with passed in keys.
OIndexCursor	iterateEntriesBetween(Object fromKey, boolean fromInclusive, Object toKey, boolean toInclusive, boolean ascOrder) Returns cursor which presents subset of index data between passed in keys.
OIndexCursor	iterateEntriesMajor(Object fromKey, boolean fromInclusive, boolean ascOrder) Returns cursor which presents subset of data which associated with key which is greater than passed in key.
OIndexCursor	iterateEntriesMinor(Object toKey, boolean toInclusive, boolean ascOrder) Returns cursor which presents subset of data which associated with key which is less than passed in key.

Methods inherited from class com.orientechnologies.orient.core.index.OIndexAbstract

acquireAtomicExclusiveLock, acquireExclusiveLock, acquireSharedLock, addCluster, addTxOperation, clear, clearSnapshot, close, commit, commitSnapshot, compareTo, contains, create, delete, doReloadIndexEngine, doRemove, doRemove, equals, flush, getAlgorithm, getClusters, getCollatingValue, getConfiguration, getDatabase, getDatabaseName, getDefinition, getFirstKey, getIndexId, getIndexNameByKey, getInternal, getKeyTypes, getLastKey, getMetadata, getName, getRebuildVersion, getType, getVersion, hashCode, hasRangeQuerySupport, interpretTxKeyChanges, isAutomatic, isRebuilding, keyCursor, loadFromConfiguration, loadMetadata, loadMetadataInternal, onIndexEngineChange, postCommit, putInSnapshot, rebuild, rebuild, releaseExclusiveLock, releaseSharedLock, remove, remove, removeCluster, removeFromSnapshot, setRebuildingFlag, setType, toString, updateConfiguration

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.orientechnologies.orient.core.index.OIndexInternal

canBeUsedInEqualityOperators, doPut, isNativeTxSupported

Methods inherited from interface com.orientechnologies.orient.core.index.OIndex

put, supportsOrderedIterations

Constructor Detail

OIndexOneValue

public OIndexOneValue(String name,
                      String type,
                      String algorithm,
                      int version,
                      OAbstractPaginatedStorage storage,
                      String valueContainerAlgorithm,
                      ODocument metadata,
                      int binaryFormatVersion)

Method Detail

get

public OIdentifiable get(Object iKey)

Description copied from interface: OIndex

Gets the set of records associated with the passed key.

Parameters:

iKey - The key to search

Returns:

The Record set if found, otherwise an empty Set

count

public long count(Object iKey)

Description copied from interface: OIndex

Counts the entries for the key.

Specified by:

count in interface OIndex<OIdentifiable>

Overrides:

count in class OIndexAbstract<OIdentifiable>

create

public OIndexOneValue create(String name,
                             OIndexDefinition indexDefinition,
                             String clusterIndexName,
                             Set<String> clustersToIndex,
                             boolean rebuild,
                             OProgressListener progressListener)

Description copied from interface: OIndex

Creates the index.

clusterIndexName - Cluster name where to place the TreeMap

iterateEntries

public OIndexCursor iterateEntries(Collection<?> keys,
                                   boolean ascSortOrder)

Description copied from interface: OIndex

Returns cursor which presents data associated with passed in keys.

Parameters:

keys - Keys data of which should be returned.

ascSortOrder - Flag which determines whether data iterated by cursor should be in ascending or descending order.

Returns:

cursor which presents data associated with passed in keys.

iterateEntriesBetween

public OIndexCursor iterateEntriesBetween(Object fromKey,
                                          boolean fromInclusive,
                                          Object toKey,
                                          boolean toInclusive,
                                          boolean ascOrder)

Description copied from interface: OIndex

Returns cursor which presents subset of index data between passed in keys.

Parameters:

fromKey - Lower border of index data.

fromInclusive - Indicates whether lower border should be inclusive or exclusive.

toKey - Upper border of index data.

toInclusive - Indicates whether upper border should be inclusive or exclusive.

ascOrder - Flag which determines whether data iterated by cursor should be in ascending or descending order.

Returns:

Cursor which presents subset of index data between passed in keys.

iterateEntriesMajor

public OIndexCursor iterateEntriesMajor(Object fromKey,
                                        boolean fromInclusive,
                                        boolean ascOrder)

Description copied from interface: OIndex

Returns cursor which presents subset of data which associated with key which is greater than passed in key.

Parameters:

fromKey - Lower border of index data.

fromInclusive - Indicates whether lower border should be inclusive or exclusive.

ascOrder - Flag which determines whether data iterated by cursor should be in ascending or descending order.

Returns:

cursor which presents subset of data which associated with key which is greater than passed in key.

iterateEntriesMinor

public OIndexCursor iterateEntriesMinor(Object toKey,
                                        boolean toInclusive,
                                        boolean ascOrder)

Description copied from interface: OIndex

Returns cursor which presents subset of data which associated with key which is less than passed in key.

Parameters:

toKey - Upper border of index data.

toInclusive - Indicates Indicates whether upper border should be inclusive or exclusive.

ascOrder - Flag which determines whether data iterated by cursor should be in ascending or descending order.

Returns:

cursor which presents subset of data which associated with key which is less than passed in key.

getSize

public long getSize()

Returns:

number of entries in the index.

getKeySize

public long getKeySize()

Returns:

Number of keys in index

cursor

public OIndexCursor cursor()

descCursor

public OIndexCursor descCursor()

isUnique

public boolean isUnique()

Specified by:

isUnique in interface OIndex<OIdentifiable>

Overrides:

isUnique in class OIndexAbstract<OIdentifiable>

determineValueSerializer

protected OBinarySerializer determineValueSerializer()

Specified by:

determineValueSerializer in class OIndexAbstract<OIdentifiable>