Value

Type Parameters:

T - the value type

All Known Subinterfaces:

Dependency, Service<T>, ServiceController<S>

All Known Implementing Classes:

AbstractService, CachedValue, CheckedValue, ClassOfValue, ConstructedValue, DefaultValue, EnvironmentPropertyValue, FieldValue, ImmediateValue, InjectedSetValue, InjectedValue, ListItemValue, ListValue, MapEntryValue, MapItemValue, MapValue, MethodValue, NullService, OptionalDependency, ReferenceValue, ServiceControllerImpl, ServiceRegistrationImpl, SetValue, SystemPropertyValue, ThreadLocalValue, ValueInjectionService, ValueService
```
public interface Value<T>
```
An indirect value. A value may be available trivially (without any computation), or it may involve a complex calculation to produce. The value may also be time-sensitive, such that it is only available under certain circumstances (e.g. when the corresponding service is "up").

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  T getValue()
  Get the actual value.

- Method Detail
  - getValue
```
T getValue()
    throws java.lang.IllegalStateException,
           java.lang.IllegalArgumentException
```
    Get the actual value.
    
    Returns:
    
    the actual value
    
    Throws:
    
    java.lang.IllegalStateException - if the value is time-sensitive and the current state does not allow retrieval.
    
    java.lang.IllegalArgumentException - when the value cannot be read due to misconfiguration