Package com.sap.cds.ql.cqn

Interface CqnValue

All Superinterfaces:

CqnToken, JSONizable

All Known Subinterfaces:

BooleanFunction, CqnArithmeticExpression, CqnArithmeticNegation, CqnBooleanLiteral, CqnComparisonPredicate, CqnConnectivePredicate, CqnContainmentTest, CqnElementRef, CqnExistsSubquery, CqnExpression, CqnFunc, CqnInPredicate, CqnListValue, CqnLiteral<T>, CqnMatchPredicate, CqnNegation, CqnNullValue, CqnNumericLiteral<N>, CqnParameter, CqnPlain, CqnPredicate, CqnSearchPredicate, CqnStringLiteral, CqnStructuredLiteral, CqnTemporalLiteral<E>, ElementRef<T>, FunctionCall<T>, Literal<T>, Parameter<T>, Predicate, Value<T>

public interface CqnValue
extends CqnToken

Method Summary

Modifier and Type	Method	Description
default <T extends CqnValue> T	as(Class<T> type)	Casts this type to the given type.
default CqnExpression	asExpression()	Casts this value to CqnExpression.
default CqnFunc	asFunction()	Casts this value to CqnFunc.
default CqnListValue	asList()	Casts this value to CqnListValue.
default CqnLiteral<?>	asLiteral()	Casts this value to CqnLiteral.
default CqnNullValue	asNullValue()	Casts this value to CqnNullValue.
default CqnParameter	asParameter()	Casts this value to CqnParameter.
default CqnPlain	asPlain()	Casts this value to CqnPlain.
default CqnElementRef	asRef()	Casts this value to CqnElementRef.
default boolean	isExpression()	Returns true if this is a CqnExpression.
default boolean	isFunction()	Returns true if this is a CqnFunc.
default boolean	isList()	Returns true if this is a CqnListValue value.
default boolean	isLiteral()	Returns true if this is a CqnLiteral.
default boolean	isNullValue()	Returns true if this is a CqnNullValue.
default boolean	isParameter()	Returns true if this is a CqnParameter.
default boolean	isPlain()	Returns true if this is a CqnPlain value.
default boolean	isRef()	Returns true if this is a CqnElementRef.
default Stream<CqnElementRef>	ofRef()
default Optional<String>	type()	Returns the optional CDS type of this value.

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

accept, tokens

Methods inherited from interface com.sap.cds.JSONizable

toJson

Method Detail

type

default Optional<String> type()

Returns the optional CDS type of this value.

Returns:

the optional CDS type

isRef

default boolean isRef()

Returns true if this is a CqnElementRef.

Returns:

true if this is an element ref, otherwise false

isExpression

default boolean isExpression()

Returns true if this is a CqnExpression.

Returns:

true if this is an expression, otherwise false

isFunction

default boolean isFunction()

Returns true if this is a CqnFunc.

Returns:

true if this is a function, otherwise false

isLiteral

default boolean isLiteral()

Returns true if this is a CqnLiteral.

Returns:

true if this is a literal, otherwise false

isNullValue

default boolean isNullValue()

Returns true if this is a CqnNullValue.

Returns:

true if this is a null value, otherwise false

isParameter

default boolean isParameter()

Returns true if this is a CqnParameter.

Returns:

true if this is a parameter, otherwise false

isPlain

default boolean isPlain()

Returns true if this is a CqnPlain value.

Returns:

true if this is a plain value, otherwise false

isList

default boolean isList()

Returns true if this is a CqnListValue value.

Returns:

true if this is a list value, otherwise false

asRef

default CqnElementRef asRef()

Casts this value to CqnElementRef.

Returns:

this value as an element ref

Throws:

ClassCastException - if this value is not an element ref

ofRef

default Stream<CqnElementRef> ofRef()

asExpression

default CqnExpression asExpression()

Casts this value to CqnExpression.

Returns:

this value as an expression

Throws:

ClassCastException - if this value is not an expression

asFunction

default CqnFunc asFunction()

Casts this value to CqnFunc.

Returns:

this value as a function

Throws:

ClassCastException - if this value is not a function

asLiteral

default CqnLiteral<?> asLiteral()

Casts this value to CqnLiteral.

Returns:

this value as a literal

Throws:

ClassCastException - if this value is not a literal

asNullValue

default CqnNullValue asNullValue()

Casts this value to CqnNullValue.

Returns:

this value as a null value

Throws:

ClassCastException - if this value is not a null value

asParameter

default CqnParameter asParameter()

Casts this value to CqnParameter.

Returns:

this value as a parameter

Throws:

ClassCastException - if this value is not a parameter

asPlain

default CqnPlain asPlain()

Casts this value to CqnPlain.

Returns:

this value as a plain value

Throws:

ClassCastException - if this value is not a plain value

asList

default CqnListValue asList()

Casts this value to CqnListValue.

Returns:

this value as a list value

Throws:

ClassCastException - if this value is not a list value

as

default <T extends CqnValue> T as(Class<T> type)

Casts this type to the given type.

Type Parameters:

T - the return type

Parameters:

type - the subtype of CqnValue to cast to

Returns:

this type casted to the given type class