com.orientechnologies.lucene.operator

Class OLuceneTextOperator

java.lang.Object

com.orientechnologies.orient.core.sql.operator.OQueryOperator

com.orientechnologies.orient.core.sql.operator.OQueryTargetOperator

com.orientechnologies.lucene.operator.OLuceneTextOperator

public class OLuceneTextOperator
extends OQueryTargetOperator

Nested Class Summary

Nested classes/interfaces inherited from class com.orientechnologies.orient.core.sql.operator.OQueryOperator

OQueryOperator.ORDER

Field Summary

Fields

Modifier and Type	Field and Description
static String	MEMORY_INDEX

Fields inherited from class com.orientechnologies.orient.core.sql.operator.OQueryOperator

DEFAULT_OPERATORS_ORDER, expectedRightWords, expectsParameters, keyword, precedence, unary

Constructor Summary

Constructors

Constructor and Description
OLuceneTextOperator()
OLuceneTextOperator(String iKeyword, int iPrecedence, boolean iLogical)

Method Summary

Modifier and Type	Method and Description
boolean	canBeMerged()
Object	evaluateRecord(OIdentifiable iRecord, ODocument iCurrentResult, OSQLFilterCondition iCondition, Object iLeft, Object iRight, OCommandContext iContext, ODocumentSerializer serializer) At run-time the evaluation per record must return always true since the recordset are filtered at the beginning unless an operator can work in both modes.
Stream<ORawPair<Object,ORID>>	executeIndexQuery(OCommandContext iContext, OIndex index, List<Object> keyParams, boolean ascSortOrder) Performs index query and returns index stream which presents subset of index data which corresponds to result of execution of given operator.
protected Collection<String>	fields(OSQLFilterCondition iCondition)
ORID	getBeginRidRange(Object iLeft, Object iRight)
protected static ODatabaseDocumentInternal	getDatabase()
ORID	getEndRidRange(Object iLeft, Object iRight)
OIndexReuseType	getIndexReuseType(Object iLeft, Object iRight) Returns hint how index can be used to calculate result of operator execution.
OIndexSearchResult	getOIndexSearchResult(OClass iSchemaClass, OSQLFilterCondition iCondition, List<OIndexSearchResult> iIndexSearchResults, OCommandContext context)
protected OLuceneFullTextIndex	involvedIndex(OIdentifiable iRecord, ODocument iCurrentResult, OSQLFilterCondition iCondition, Object iLeft, Object iRight)

Methods inherited from class com.orientechnologies.orient.core.sql.operator.OQueryOperator

canShortCircuit, compare, configure, getSyntax, isSupportingBinaryEvaluate, isUnary, toString, updateProfiler

Methods inherited from class java.lang.Object

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

Field Detail

MEMORY_INDEX

public static final String MEMORY_INDEX

See Also:

Constant Field Values

Constructor Detail

OLuceneTextOperator

public OLuceneTextOperator()

OLuceneTextOperator

public OLuceneTextOperator(String iKeyword,
                           int iPrecedence,
                           boolean iLogical)

Method Detail

getDatabase

protected static ODatabaseDocumentInternal getDatabase()

getIndexReuseType

public OIndexReuseType getIndexReuseType(Object iLeft,
                                         Object iRight)

Description copied from class: OQueryOperator

Returns hint how index can be used to calculate result of operator execution.

Specified by:

getIndexReuseType in class OQueryOperator

Parameters:

iLeft - Value of left query parameter.

iRight - Value of right query parameter.

Returns:

Hint how index can be used to calculate result of operator execution.

getOIndexSearchResult

public OIndexSearchResult getOIndexSearchResult(OClass iSchemaClass,
                                                OSQLFilterCondition iCondition,
                                                List<OIndexSearchResult> iIndexSearchResults,
                                                OCommandContext context)

Overrides:

getOIndexSearchResult in class OQueryOperator

executeIndexQuery

public Stream<ORawPair<Object,ORID>> executeIndexQuery(OCommandContext iContext,
                                                       OIndex index,
                                                       List<Object> keyParams,
                                                       boolean ascSortOrder)

Description copied from class: OQueryOperator

Performs index query and returns index stream which presents subset of index data which corresponds to result of execution of given operator.

Query that should be executed can be presented like: [[property0 = keyParam0] and [property1 = keyParam1] and] propertyN operator keyParamN.

It is supped that index which passed in as parameter is used to index properties listed above and responsibility of given method execute query using given parameters.

Multiple parameters are passed in to implement composite indexes support.

Overrides:

executeIndexQuery in class OQueryOperator

index - Instance of index that will be used to calculate result of operator execution.

keyParams - Parameters of query is used to calculate query result.

ascSortOrder - Data returned by cursors should be sorted in ascending or descending order.

Returns:

Cursor instance if index can be used to evaluate result of execution of given operator and null otherwise.

getBeginRidRange

public ORID getBeginRidRange(Object iLeft,
                             Object iRight)

Specified by:

getBeginRidRange in class OQueryOperator

getEndRidRange

public ORID getEndRidRange(Object iLeft,
                           Object iRight)

Specified by:

getEndRidRange in class OQueryOperator

canBeMerged

public boolean canBeMerged()

Overrides:

canBeMerged in class OQueryOperator

evaluateRecord

public Object evaluateRecord(OIdentifiable iRecord,
                             ODocument iCurrentResult,
                             OSQLFilterCondition iCondition,
                             Object iLeft,
                             Object iRight,
                             OCommandContext iContext,
                             ODocumentSerializer serializer)

Description copied from class: OQueryTargetOperator

At run-time the evaluation per record must return always true since the recordset are filtered at the beginning unless an operator can work in both modes. In this case sub-class must extend it.

Overrides:

evaluateRecord in class OQueryTargetOperator

involvedIndex

protected OLuceneFullTextIndex involvedIndex(OIdentifiable iRecord,
                                             ODocument iCurrentResult,
                                             OSQLFilterCondition iCondition,
                                             Object iLeft,
                                             Object iRight)

fields

protected Collection<String> fields(OSQLFilterCondition iCondition)