程序包 org.hibernate.query.criteria.internal.expression.function

类 AggregationFunction<T>

java.lang.Object

org.hibernate.query.criteria.internal.AbstractNode

org.hibernate.query.criteria.internal.expression.AbstractTupleElement<X>

org.hibernate.query.criteria.internal.expression.SelectionImpl<T>

org.hibernate.query.criteria.internal.expression.ExpressionImpl<X>

org.hibernate.query.criteria.internal.expression.function.BasicFunctionExpression<X>

org.hibernate.query.criteria.internal.expression.function.ParameterizedFunctionExpression<T>

org.hibernate.query.criteria.internal.expression.function.AggregationFunction<T>

所有已实现的接口:

Serializable, javax.persistence.criteria.Expression<T>, javax.persistence.criteria.Selection<T>, javax.persistence.TupleElement<T>, FunctionExpression<T>, ExpressionImplementor<T>, ParameterContainer, Renderable, SelectionImplementor<T>, TupleElementImplementor<T>

直接已知子类:

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).

作者:

Steve Ebersole

另请参阅:

序列化表格

嵌套类概要

嵌套类

修饰符和类型	类	说明
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.

从接口继承的嵌套类/接口 org.hibernate.query.criteria.internal.ParameterContainer

ParameterContainer.Helper

字段概要

从类继承的字段 org.hibernate.query.criteria.internal.expression.function.ParameterizedFunctionExpression

STANDARD_JPA_FUNCTION_NAMES

构造器概要

构造器

构造器	说明
AggregationFunction(CriteriaBuilderImpl criteriaBuilder, Class<T> returnType, String functionName, Object argument)	Constructs an aggregation function with a single literal argument.
AggregationFunction(CriteriaBuilderImpl criteriaBuilder, Class<T> returnType, String functionName, javax.persistence.criteria.Expression<?> argument)	Constructs an aggregation function with a single literal argument.

方法概要

修饰符和类型	方法	说明
boolean	isAggregation()	Is this function a value aggregator (like a COUNT or MAX function e.g.)?
protected boolean	isStandardJpaFunction()

从类继承的方法 org.hibernate.query.criteria.internal.expression.function.ParameterizedFunctionExpression

getArgumentExpressions, properSize, registerParameters, render, renderArguments

从类继承的方法 org.hibernate.query.criteria.internal.expression.function.BasicFunctionExpression

getFunctionName

从类继承的方法 org.hibernate.query.criteria.internal.expression.ExpressionImpl

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

从类继承的方法 org.hibernate.query.criteria.internal.expression.SelectionImpl

alias, getCompoundSelectionItems, getValueHandlers, isCompoundSelection

从类继承的方法 org.hibernate.query.criteria.internal.expression.AbstractTupleElement

forceConversion, getAlias, getJavaType, getValueHandler, resetJavaType, setAlias

从类继承的方法 org.hibernate.query.criteria.internal.AbstractNode

criteriaBuilder

从类继承的方法 java.lang.Object

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

从接口继承的方法 javax.persistence.criteria.Expression

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

从接口继承的方法 org.hibernate.query.criteria.internal.expression.function.FunctionExpression

getFunctionName

从接口继承的方法 javax.persistence.criteria.Selection

alias, getCompoundSelectionItems, isCompoundSelection

从接口继承的方法 org.hibernate.query.criteria.internal.SelectionImplementor

getValueHandlers

从接口继承的方法 javax.persistence.TupleElement

getAlias, getJavaType

从接口继承的方法 org.hibernate.query.criteria.internal.TupleElementImplementor

getValueHandler

构造器详细资料

AggregationFunction

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

Constructs an aggregation function with a single literal argument.

参数:

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,
                           javax.persistence.criteria.Expression<?> argument)

Constructs an aggregation function with a single literal argument.

参数:

criteriaBuilder - The query builder instance.

returnType - The function return type.

functionName - The name of the function.

argument - The argument

方法详细资料

isAggregation

public boolean isAggregation()

从接口复制的说明: FunctionExpression

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

指定者:

isAggregation 在接口中 FunctionExpression<T>

覆盖:

isAggregation 在类中 BasicFunctionExpression<T>

返回:

True if this functions does aggregation.

isStandardJpaFunction

protected boolean isStandardJpaFunction()

覆盖:

isStandardJpaFunction 在类中 ParameterizedFunctionExpression<T>