org.hibernate.ejb.criteria.expression.function

Class AggregationFunction<T>

java.lang.Object

org.hibernate.ejb.criteria.AbstractNode

org.hibernate.ejb.criteria.expression.AbstractTupleElement<X>

org.hibernate.ejb.criteria.expression.SelectionImpl<T>

org.hibernate.ejb.criteria.expression.ExpressionImpl<X>

org.hibernate.ejb.criteria.expression.function.BasicFunctionExpression<X>

org.hibernate.ejb.criteria.expression.function.ParameterizedFunctionExpression<T>

org.hibernate.ejb.criteria.expression.function.AggregationFunction<T>

All Implemented Interfaces:

Serializable, Expression<T>, Selection<T>, TupleElement<T>, FunctionExpression<T>, ExpressionImplementor<T>, ParameterContainer, Renderable, SelectionImplementor<T>, TupleElementImplementor<T>

Direct Known Subclasses:

AggregationFunction.AVG, AggregationFunction.COUNT, AggregationFunction.GREATEST, AggregationFunction.LEAST, AggregationFunction.MAX, AggregationFunction.MIN, AggregationFunction.SUM

public class AggregationFunction<T>
extends ParameterizedFunctionExpression<T>
implements Serializable

Models SQL aggregation functions (MIN, MAX, COUNT, etc).

Author:

Steve Ebersole

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	AggregationFunction.AVG Implementation of a AVG function providing convenience in construction.
static class	AggregationFunction.COUNT Implementation of a COUNT function providing convenience in construction.
static class	AggregationFunction.GREATEST<X extends Comparable<X>> Models the MAX function in terms of non-numeric expressions.
static class	AggregationFunction.LEAST<X extends Comparable<X>> Models the MIN function in terms of non-numeric expressions.
static class	AggregationFunction.MAX<N extends Number> Implementation of a MAX function providing convenience in construction.
static class	AggregationFunction.MIN<N extends Number> Implementation of a MIN function providing convenience in construction.
static class	AggregationFunction.SUM<N extends Number> Implementation of a SUM function providing convenience in construction.

Nested classes/interfaces inherited from interface org.hibernate.ejb.criteria.ParameterContainer

ParameterContainer.Helper

Constructor Summary

Constructors

Constructor and Description
AggregationFunction(CriteriaBuilderImpl criteriaBuilder, Class<T> returnType, String functionName, Expression<?> argument) Constructs an aggregation function with a single literal argument.
AggregationFunction(CriteriaBuilderImpl criteriaBuilder, Class<T> returnType, String functionName, Object argument) Constructs an aggregation function with a single literal argument.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	isAggregation() Is this function a value aggregator (like a COUNT or MAX function e.g.)?

Methods inherited from class org.hibernate.ejb.criteria.expression.function.ParameterizedFunctionExpression

getArgumentExpressions, properSize, registerParameters, render, renderArguments, wrapAsLiterals

Methods inherited from class org.hibernate.ejb.criteria.expression.function.BasicFunctionExpression

getFunctionName, renderProjection

Methods inherited from class org.hibernate.ejb.criteria.expression.ExpressionImpl

as, asBigDecimal, asBigInteger, asDouble, asFloat, asInteger, asLong, asString, in, in, in, in, isNotNull, isNull

Methods inherited from class org.hibernate.ejb.criteria.expression.SelectionImpl

alias, getCompoundSelectionItems, getValueHandlers, isCompoundSelection

Methods inherited from class org.hibernate.ejb.criteria.expression.AbstractTupleElement

forceConversion, getAlias, getJavaType, getValueHandler, resetJavaType, setAlias

Methods inherited from class org.hibernate.ejb.criteria.AbstractNode

criteriaBuilder

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.hibernate.ejb.criteria.expression.function.FunctionExpression

getFunctionName

Methods inherited from interface javax.persistence.criteria.Expression

as, in, in, in, in, isNotNull, isNull

Methods inherited from interface javax.persistence.criteria.Selection

alias, getCompoundSelectionItems, isCompoundSelection

Methods inherited from interface javax.persistence.TupleElement

getAlias, getJavaType

Methods inherited from interface org.hibernate.ejb.criteria.SelectionImplementor

getValueHandlers

Methods inherited from interface org.hibernate.ejb.criteria.TupleElementImplementor

getValueHandler

Constructor Detail

AggregationFunction

public AggregationFunction(CriteriaBuilderImpl criteriaBuilder,
                   Class<T> returnType,
                   String functionName,
                   Object argument)

Constructs an aggregation function with a single literal argument.

Parameters:

criteriaBuilder - The query builder instance.

returnType - The function return type.

functionName - The name of the function.

argument - The literal argument

AggregationFunction

public AggregationFunction(CriteriaBuilderImpl criteriaBuilder,
                   Class<T> returnType,
                   String functionName,
                   Expression<?> argument)

Constructs an aggregation function with a single literal argument.

Parameters:

criteriaBuilder - The query builder instance.

returnType - The function return type.

functionName - The name of the function.

argument - The argument

Method Detail

isAggregation

public boolean isAggregation()

Description copied from interface: FunctionExpression

Is this function a value aggregator (like a COUNT or MAX function e.g.)?

Specified by:

isAggregation in interface FunctionExpression<T>

Overrides:

isAggregation in class BasicFunctionExpression<T>

Returns:

True if this functions does aggregation.