CqnValue (cds4j:api 1.15.1 API)

All Superinterfaces:

CqnToken, JSONizable

All Known Subinterfaces:

BooleanFunction, CqnArithmeticExpression, CqnArithmeticNegation, CqnBooleanLiteral, CqnComparisonPredicate, CqnConnectivePredicate, CqnContainmentTest, CqnElementRef, CqnExpression, CqnFunc, CqnInPredicate, CqnLiteral<T>, CqnMatchPredicate, CqnNegation, CqnNullValue, CqnNumericLiteral<N>, CqnParameter, CqnPlain, CqnPredicate, CqnSearchPredicate, CqnStringLiteral, CqnTemporalLiteral<E>, CqnXpr, ElementRef<T>, FunctionCall<T>, Literal<T>, Parameter<T>, Predicate, Value<T>
```
public interface CqnValue
extends CqnToken
```

Method Summary

All Methods Instance Methods Default Methods
Modifier and Type	Method and 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 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`	`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 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
  - 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
  - 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
  - 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

Interface CqnValue

Method Summary

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

Methods inherited from interface com.sap.cds.JSONizable

Method Detail

type

isRef

isExpression

isFunction

isLiteral

isNullValue

isParameter

isPlain

asRef

asExpression

asFunction

asLiteral

asNullValue

asParameter

asPlain

as