Module io.helidon.data.codegen.query

Package io.helidon.data.codegen.query

Class ProjectionExpression

java.lang.Object

io.helidon.data.codegen.query.ProjectionExpression

public class ProjectionExpression
extends Object

Projection expression.

Method Summary

Modifier and Type	Method	Description
static ProjectionExpression	createAvg()	Create projection expression with ProjectionOperator.Avg operator.
static ProjectionExpression	createCount()	Create projection expression with ProjectionOperator.Count operator.
static ProjectionExpression	createExists()	Create projection expression with ProjectionOperator.Exists operator.
static ProjectionExpression	createFirst(int count)	Create projection expression with ProjectionOperator.First operator.
static ProjectionExpression	createMax()	Create projection expression with ProjectionOperator.Max operator.
static ProjectionExpression	createMin()	Create projection expression with ProjectionOperator.Min operator.
static ProjectionExpression	createSum()	Create projection expression with ProjectionOperator.Sum operator.
ProjectionOperator	operator()	Projection expression operator.
Optional<ProjectionParameter<?>>	parameter()	Projection expression parameter.

Methods inherited from class java.lang.Object

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

Method Details

createFirst

public static ProjectionExpression createFirst(int count)

Create projection expression with ProjectionOperator.First operator.

Parameters:

count - count parameter of the First operator.

Returns:

new instance of projection expression

createCount

public static ProjectionExpression createCount()

Create projection expression with ProjectionOperator.Count operator.

Returns:

new instance of projection expression

createExists

public static ProjectionExpression createExists()

Create projection expression with ProjectionOperator.Exists operator.

Returns:

new instance of projection expression

createMin

public static ProjectionExpression createMin()

Create projection expression with ProjectionOperator.Min operator.

Returns:

new instance of projection expression

createMax

public static ProjectionExpression createMax()

Create projection expression with ProjectionOperator.Max operator.

Returns:

new instance of projection expression

createSum

public static ProjectionExpression createSum()

Create projection expression with ProjectionOperator.Sum operator.

Returns:

new instance of projection expression

createAvg

public static ProjectionExpression createAvg()

Create projection expression with ProjectionOperator.Avg operator.

Returns:

new instance of projection expression

operator

public ProjectionOperator operator()

Projection expression operator.

Returns:

the operator

parameter

public Optional<ProjectionParameter<?>> parameter()

Projection expression parameter. Required when ProjectionOperator.hasParameter() returns true. Currently only ProjectionOperator.First requires single numeric parameter.

Returns:

the parameter