Package org.teiid.query.sql.lang

Class IsDistinctCriteria

java.lang.Object

org.teiid.query.sql.lang.Criteria

org.teiid.query.sql.lang.PredicateCriteria

org.teiid.query.sql.lang.IsDistinctCriteria

All Implemented Interfaces:

Cloneable, PredicateCriteria.Negatable, LanguageObject, Expression

public class IsDistinctCriteria
extends PredicateCriteria
implements PredicateCriteria.Negatable

Represents criteria such as: "<expression> IS DISTINCT FROM <expression>". However due to a lack of direct support for new/old groups as row values, we reference group symbols here instead.

Nested Class Summary

Nested classes/interfaces inherited from class org.teiid.query.sql.lang.PredicateCriteria

PredicateCriteria.Negatable

Nested classes/interfaces inherited from interface org.teiid.query.sql.LanguageObject

LanguageObject.Util

Constructor Summary

Constructors

Constructor	Description
IsDistinctCriteria()	Constructs a default instance of this class.

Method Summary

Modifier and Type	Method	Description
void	acceptVisitor(LanguageVisitor visitor)	Method for accepting a visitor.
Object	clone()	Deep copy of object
boolean	equals(Object obj)	Compares this criteria to another object for equality
LanguageObject	getLeftRowValue()
LanguageObject	getRightRowValue()
int	hashCode()	Get hash code.
boolean	isNegated()	Returns whether this criteria is negated.
void	negate()
void	setLeftRowValue(LanguageObject leftRowValue)
void	setNegated(boolean negationFlag)	Sets the negation flag for this criteria.
void	setRightRowValue(LanguageObject rightRowValue)

Methods inherited from class org.teiid.query.sql.lang.Criteria

applyDemorgan, combineCriteria, combineCriteria, combineCriteria, getType, separateCriteriaByAnd, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

IsDistinctCriteria

public IsDistinctCriteria()

Constructs a default instance of this class.

Method Detail

setLeftRowValue

public void setLeftRowValue(LanguageObject leftRowValue)

setRightRowValue

public void setRightRowValue(LanguageObject rightRowValue)

getLeftRowValue

public LanguageObject getLeftRowValue()

getRightRowValue

public LanguageObject getRightRowValue()

isNegated

public boolean isNegated()

Returns whether this criteria is negated.

Returns:

flag indicating whether this criteria contains a NOT

setNegated

public void setNegated(boolean negationFlag)

Sets the negation flag for this criteria.

Parameters:

negationFlag - true if this criteria contains a NOT; false otherwise

negate

public void negate()

Specified by:

negate in interface PredicateCriteria.Negatable

acceptVisitor

public void acceptVisitor(LanguageVisitor visitor)

Description copied from interface: LanguageObject

Method for accepting a visitor. It is the responsibility of the language object to call back on the visitor.

Specified by:

acceptVisitor in interface LanguageObject

Parameters:

visitor - Visitor being used

hashCode

public int hashCode()

Get hash code. WARNING: The hash code is based on data in the criteria. If data values are changed, the hash code will change - don't hash this object and change values.

Overrides:

hashCode in class Object

Returns:

Hash code for object

equals

public boolean equals(Object obj)

Compares this criteria to another object for equality

Overrides:

equals in class Object

Parameters:

obj - Other object

Returns:

True if objects are equal

clone

public Object clone()

Deep copy of object

Specified by:

clone in interface LanguageObject

Specified by:

clone in class PredicateCriteria

Returns:

Deep copy of object