com.orientechnologies.orient.core.sql.parser

Class OIsNullCondition

java.lang.Object

com.orientechnologies.orient.core.sql.parser.SimpleNode

com.orientechnologies.orient.core.sql.parser.OBooleanExpression

com.orientechnologies.orient.core.sql.parser.OIsNullCondition

All Implemented Interfaces:

Node

public class OIsNullCondition
extends OBooleanExpression

Field Summary

Fields

Modifier and Type	Field and Description
protected OExpression	expression

Fields inherited from class com.orientechnologies.orient.core.sql.parser.OBooleanExpression

FALSE, TRUE

Fields inherited from class com.orientechnologies.orient.core.sql.parser.SimpleNode

children, firstToken, id, lastToken, parent, parser, value

Constructor Summary

Constructors

Constructor and Description
OIsNullCondition(int id)
OIsNullCondition(OrientSql p, int id)

Method Summary

Modifier and Type	Method and Description
boolean	evaluate(OIdentifiable currentRecord, OCommandContext ctx)
OExpression	getExpression()
protected List<Object>	getExternalCalculationConditions()
List<String>	getMatchPatternInvolvedAliases()
protected int	getNumberOfExternalCalculations()
Object	jjtAccept(OrientSqlVisitor visitor, Object data) Accept the visitor.
void	setExpression(OExpression expression)
boolean	supportsBasicCalculation()
void	toString(Map<Object,Object> params, StringBuilder builder)

Methods inherited from class com.orientechnologies.orient.core.sql.parser.OBooleanExpression

encapsulateInAndBlock, flatten, getIndexedFunctionConditions

Methods inherited from class com.orientechnologies.orient.core.sql.parser.SimpleNode

childrenAccept, dump, getDatabase, getValue, jjtAddChild, jjtClose, jjtGetChild, jjtGetFirstToken, jjtGetLastToken, jjtGetNumChildren, jjtGetParent, jjtGetValue, jjtOpen, jjtSetFirstToken, jjtSetLastToken, jjtSetParent, jjtSetValue, toString, toString

Methods inherited from class java.lang.Object

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

Field Detail

expression

protected OExpression expression

Constructor Detail

OIsNullCondition

public OIsNullCondition(int id)

OIsNullCondition

public OIsNullCondition(OrientSql p,
                        int id)

Method Detail

jjtAccept

public Object jjtAccept(OrientSqlVisitor visitor,
                        Object data)

Accept the visitor.

Specified by:

jjtAccept in interface Node

Overrides:

jjtAccept in class OBooleanExpression

evaluate

public boolean evaluate(OIdentifiable currentRecord,
                        OCommandContext ctx)

Specified by:

evaluate in class OBooleanExpression

getExpression

public OExpression getExpression()

setExpression

public void setExpression(OExpression expression)

toString

public void toString(Map<Object,Object> params,
                     StringBuilder builder)

Overrides:

toString in class SimpleNode

supportsBasicCalculation

public boolean supportsBasicCalculation()

Specified by:

supportsBasicCalculation in class OBooleanExpression

Returns:

true if this expression can be calculated in plain Java, false otherwise (eg. LUCENE operator)

getNumberOfExternalCalculations

protected int getNumberOfExternalCalculations()

Specified by:

getNumberOfExternalCalculations in class OBooleanExpression

Returns:

the number of sub-expressions that have to be calculated using an external engine (eg. LUCENE)

getExternalCalculationConditions

protected List<Object> getExternalCalculationConditions()

Specified by:

getExternalCalculationConditions in class OBooleanExpression

Returns:

the sub-expressions that have to be calculated using an external engine (eg. LUCENE)

getMatchPatternInvolvedAliases

public List<String> getMatchPatternInvolvedAliases()

Specified by:

getMatchPatternInvolvedAliases in class OBooleanExpression