com.holonplatform.core.query

Interface ConstantExpression<T>

Type Parameters:

T - Expression type

All Superinterfaces:

ConstantConverterExpression<T,T>, ConverterExpression<T>, Expression, QueryProjection<T>, TypedExpression<T>

public interface ConstantExpression<T>
extends ConstantConverterExpression<T,T>, QueryProjection<T>

Constant value expression which can also act as QueryProjection.

Since:

5.0.0

Nested Class Summary

Nested classes/interfaces inherited from interface com.holonplatform.core.Expression

Expression.ExpressionResolverFunction<E extends Expression,R extends Expression>, Expression.InvalidExpressionException

Method Summary

Modifier and Type	Method and Description
static <T> ConstantExpression<T>	create(T value) Create a ConstantExpression which represents a constant value.
static <T> ConstantExpression<T>	create(T value, Class<? extends T> type) Create a ConstantExpression which represents a constant value.
static <T> ConstantExpression<T>	create(TypedExpression<T> expression, T value) Create a ConstantExpression which represents a constant value, using given expression to inherit an ExpressionValueConverter, if available.

Methods inherited from interface com.holonplatform.core.ConstantConverterExpression

getModelValue, getValue

Methods inherited from interface com.holonplatform.core.ConverterExpression

getExpressionValueConverter, getModelType, getModelValue

Methods inherited from interface com.holonplatform.core.TypedExpression

getTemporalType, getType, isCollectionExpression, isConverterExpression

Methods inherited from interface com.holonplatform.core.Expression

validate

Methods inherited from interface com.holonplatform.core.query.QueryProjection

bean, constant, countAll, path, propertySet, propertySet

Method Detail

create

static <T> ConstantExpression<T> create(T value)

Create a ConstantExpression which represents a constant value.

Specified by:

create in interface ConstantConverterExpression<T,T>

Type Parameters:

T - Expression type

Parameters:

value - Constant value

Returns:

A new constant expression

create

static <T> ConstantExpression<T> create(T value,
                                        Class<? extends T> type)

Create a ConstantExpression which represents a constant value.

Specified by:

create in interface ConstantConverterExpression<T,T>

Type Parameters:

T - Expression type

Parameters:

value - Constant value

type - Constant value type (not null)

Returns:

A new constant expression

create

static <T> ConstantExpression<T> create(TypedExpression<T> expression,
                                        T value)

Create a ConstantExpression which represents a constant value, using given expression to inherit an ExpressionValueConverter, if available.

Specified by:

create in interface ConstantConverterExpression<T,T>

Type Parameters:

T - Expression type

Parameters:

expression - Expression form which to inherit an ExpressionValueConverter, if available (not null)

value - Constant value

Returns:

A new constant expression