Package org.apache.thrift
Class Option<T>
java.lang.Object
org.apache.thrift.Option<T>
- Direct Known Subclasses:
Option.None
,Option.Some
Implementation of the Option type pattern
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Nested Class Summary
Modifier and TypeClassDescriptionstatic class
The None type, representing an absent value (instead of "null")static class
The Some type, representing an existence of some value -
Constructor Summary
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Method Summary
Modifier and TypeMethodDescriptionstatic <T> Option<T>
fromNullable
(T value) Wraps value in an Option type, depending on whether or not value is nullabstract T
get()
Get the value of the Option (if it is defined)abstract boolean
Whether the Option is defined or notstatic <T> Option.None<T>
none()
Get the contained value (if defined) or else return a default valuestatic <T> Option.Some<T>
some
(T value) Wrap value in a Some type (NB!Turn this Option into Java 8 Optional type
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Constructor Details
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Option
public Option()
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Method Details
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isDefined
public abstract boolean isDefined()Whether the Option is defined or not- Returns:
- true if the Option is defined (of type Some) false if the Option is not defined (of type None)
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get
Get the value of the Option (if it is defined)- Returns:
- the value
- Throws:
IllegalStateException
- if called on a None
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or
Get the contained value (if defined) or else return a default value- Parameters:
other
- what to return if the value is not defined (a None)- Returns:
- either the value, or other if the value is not defined
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toOptional
Turn this Option into Java 8 Optional type- Returns:
- Java 8+ Optional Type
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fromNullable
Wraps value in an Option type, depending on whether or not value is null- Type Parameters:
T
- the type of value- Parameters:
value
- the value to wrap in Option- Returns:
- Some(value) if value is not null, None if value is null
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some
Wrap value in a Some type (NB! value must not be null!)- Type Parameters:
T
- the type of value- Parameters:
value
- the value to wrap.- Returns:
- a new Some(value)
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none
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