com.saperion.database.query.predicates

Class IsEmpty<ElementType,CollectionType extends Collection<ElementType>>

java.lang.Object

com.saperion.database.query.NodeExpression<ResultExpressionType>

com.saperion.database.query.UnaryOperator<CollectionType,Boolean>

com.saperion.database.query.predicates.IsEmpty<ElementType,CollectionType>

All Implemented Interfaces:

QueryExpression<Boolean>, Serializable

public class IsEmpty<ElementType,CollectionType extends Collection<ElementType>>
extends UnaryOperator<CollectionType,Boolean>

A QueryExpression that checks whether its operand is an empty list.

Author:

jschwarz

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static String	OPERATOR_IDENTIFIER

Constructor Summary

Constructors

Constructor and Description
IsEmpty(QueryExpression<? extends CollectionType> operand)

Method Summary

Methods

Modifier and Type	Method and Description
QueryExpression<Boolean>	copy()

Methods inherited from class com.saperion.database.query.UnaryOperator

appendQueryParameters, asQueryLanguage, getOperand, precedence, queryStringSizeGuess, setOperand, toString

Methods inherited from class com.saperion.database.query.NodeExpression

getChildren, getExpressionType, listDescendantsOfType, listParentsOfDescendantsOfType, setChild

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.saperion.database.query.QueryExpression

getExpressionType, listDescendantsOfType, listParentsOfDescendantsOfType

Field Detail

OPERATOR_IDENTIFIER

public static final String OPERATOR_IDENTIFIER

See Also:

Constant Field Values

Constructor Detail

IsEmpty

public IsEmpty(QueryExpression<? extends CollectionType> operand)

Method Detail

copy

public QueryExpression<Boolean> copy()