com.orientechnologies.orient.core.index

Class OIndexNotUnique

java.lang.Object

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

com.orientechnologies.orient.core.index.OIndexMultiValues

com.orientechnologies.orient.core.index.OIndexNotUnique

All Implemented Interfaces:

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

public class OIndexNotUnique
extends OIndexMultiValues

Index implementation that allows multiple values for the same key.

Author:

Luca Garulli (l.garulli--(at)--orientdb.com)

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

binaryFormatVersion, clustersToIndex, CONFIG_CLUSTERS, CONFIG_MAP_RID, configuration, indexId, metadata, storage, type, 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
OIndexNotUnique(String name, String typeId, String algorithm, int version, OAbstractPaginatedStorage storage, String valueContainerAlgorithm, ODocument metadata, int binaryFormatVersion)

Method Summary

Modifier and Type	Method and Description
boolean	canBeUsedInEqualityOperators() Indicates whether given index can be used to calculate result of OQueryOperatorEquality operators.
protected Iterable<OTransactionIndexChangesPerKey.OTransactionIndexEntry>	interpretTxKeyChanges(OTransactionIndexChangesPerKey changes) Interprets transaction index changes for a certain key.
boolean	supportsOrderedIterations()

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

count, create, cursor, descCursor, determineValueSerializer, get, getKeySize, getSize, iterateEntries, iterateEntriesBetween, iterateEntriesMajor, iterateEntriesMinor, put, remove

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, equals, flush, getAlgorithm, getClusters, getCollatingValue, getConfiguration, getDatabase, getDatabaseName, getDefinition, getEngineProperties, getFirstKey, getIndexId, getIndexNameByKey, getInternal, getKeyTypes, getLastKey, getMetadata, getName, getRebuildVersion, getType, getVersion, hashCode, hasRangeQuerySupport, indexCluster, indexConfigurationInstance, isAutomatic, isRebuilding, isUnique, keyCursor, loadFromConfiguration, loadMetadata, loadMetadataInternal, onIndexEngineChange, populateIndex, postCommit, preCommit, putInSnapshot, rebuild, rebuild, releaseExclusiveLock, releaseSharedLock, remove, removeCluster, removeFromSnapshot, removeFromSnapshot, setRebuildingFlag, setType, toString, updateConfiguration

Methods inherited from class java.lang.Object

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

Constructor Detail

OIndexNotUnique

public OIndexNotUnique(String name,
                       String typeId,
                       String algorithm,
                       int version,
                       OAbstractPaginatedStorage storage,
                       String valueContainerAlgorithm,
                       ODocument metadata,
                       int binaryFormatVersion)

Method Detail

canBeUsedInEqualityOperators

public boolean canBeUsedInEqualityOperators()

Description copied from interface: OIndexInternal

Indicates whether given index can be used to calculate result of OQueryOperatorEquality operators.

Returns:

true if given index can be used to calculate result of OQueryOperatorEquality operators.

supportsOrderedIterations

public boolean supportsOrderedIterations()

interpretTxKeyChanges

protected Iterable<OTransactionIndexChangesPerKey.OTransactionIndexEntry> interpretTxKeyChanges(OTransactionIndexChangesPerKey changes)

Description copied from class: OIndexAbstract

Interprets transaction index changes for a certain key. Override it to customize index behaviour on interpreting index changes. This may be viewed as an optimization, but in some cases this is a requirement. For example, if you put multiple values under the same key during the transaction for single-valued/unique index, but remove all of them except one before commit, there is no point in throwing ORecordDuplicatedException while applying index changes.

Overrides:

interpretTxKeyChanges in class OIndexAbstract<Set<OIdentifiable>>

Parameters:

changes - the changes to interpret.

Returns:

the interpreted index key changes.