Package com.sap.cds.ql.cqn

Interface CqnLiteral<T>

All Superinterfaces:

CqnToken, CqnValue, JSONizable

All Known Subinterfaces:

CqnBooleanLiteral, CqnNumericLiteral<N>, CqnStringLiteral, CqnStructuredLiteral, CqnTemporalLiteral<E>, Literal<T>

public interface CqnLiteral<T>
extends CqnValue

Method Summary

Modifier and Type	Method	Description
default CqnBooleanLiteral	asBoolean()	Casts this literal to CqnBooleanLiteral.
default CqnLiteral<?>	asLiteral()	Casts this value to CqnLiteral.
default CqnNumericLiteral<?>	asNumber()	Casts this literal to CqnNumericLiteral.
default CqnStringLiteral	asString()	Casts this literal to CqnStringLiteral.
default CqnStructuredLiteral	asStructured()	Casts this literal to CqnStructuredLiteral.
default CqnTemporalLiteral<?>	asTemporal()	Casts this literal to CqnTemporalLiteral.
default boolean	isBoolean()	Returns true if this is a CqnBooleanLiteral.
default boolean	isConstant()	Defines if the CqnLiteral can be handled as a constant value during query execution.
default boolean	isLiteral()	Returns true if this is a CqnLiteral.
default boolean	isNumeric()	Returns true if this is a CqnNumericLiteral.
default boolean	isString()	Returns true if this is a CqnStringLiteral.
default boolean	isStructured()	Returns true if this is a CqnStructuredLiteral.
default boolean	isTemporal()	Returns true if this is a CqnTemporalLiteral.
T	value()	Returns the literal value.

Methods inherited from interface com.sap.cds.ql.cqn.CqnToken

accept, tokens

Methods inherited from interface com.sap.cds.ql.cqn.CqnValue

as, asExpression, asFunction, asList, asNullValue, asParameter, asPlain, asRef, isExpression, isFunction, isList, isNullValue, isParameter, isPlain, isRef, ofRef, type

Methods inherited from interface com.sap.cds.JSONizable

toJson

Method Detail

value

T value()

Returns the literal value.

Returns:

the literal value

isConstant

default boolean isConstant()

Defines if the CqnLiteral can be handled as a constant value during query execution.

Returns:

true if the literal can be handled as a constant value

asLiteral

default CqnLiteral<?> asLiteral()

Description copied from interface: CqnValue

Casts this value to CqnLiteral.

Specified by:

asLiteral in interface CqnValue

Returns:

this value as a literal

isLiteral

default boolean isLiteral()

Description copied from interface: CqnValue

Returns true if this is a CqnLiteral.

Specified by:

isLiteral in interface CqnValue

Returns:

true if this is a literal, otherwise false

isBoolean

default boolean isBoolean()

Returns true if this is a CqnBooleanLiteral.

Returns:

true if this is a boolean literal, otherwise false

isNumeric

default boolean isNumeric()

Returns true if this is a CqnNumericLiteral.

Returns:

true if this is a numeric literal, otherwise false

isString

default boolean isString()

Returns true if this is a CqnStringLiteral.

Returns:

true if this is a string literal, otherwise false

isTemporal

default boolean isTemporal()

Returns true if this is a CqnTemporalLiteral.

Returns:

true if this is a temporal literal, otherwise false

isStructured

default boolean isStructured()

Returns true if this is a CqnStructuredLiteral.

Returns:

true if this is a structured literal, otherwise false

asBoolean

default CqnBooleanLiteral asBoolean()

Casts this literal to CqnBooleanLiteral.

Returns:

this literal as a boolean literal

Throws:

ClassCastException - if this literal is not boolean

asString

default CqnStringLiteral asString()

Casts this literal to CqnStringLiteral.

Returns:

this literal as a string literal

Throws:

ClassCastException - if this literal is not a string literal

asNumber

default CqnNumericLiteral<?> asNumber()

Casts this literal to CqnNumericLiteral.

Returns:

this literal as a numeric literal

Throws:

ClassCastException - if this literal is not numeric

asTemporal

default CqnTemporalLiteral<?> asTemporal()

Casts this literal to CqnTemporalLiteral.

Returns:

this literal as a temporal literal

Throws:

ClassCastException - if this literal is not temporal

asStructured

default CqnStructuredLiteral asStructured()

Casts this literal to CqnStructuredLiteral.

Returns:

this literal as a structured literal

Throws:

ClassCastException - if this literal is not structured