IDeclaration

All Known Subinterfaces:

IArgumentDeclaration, IDeclarationBlock, IDeclarationElement

All Known Implementing Classes:

ArgumentDeclaration, Declaration, DeclarationBlock, DeclarationElement, EmptyDeclarationBlock
```
public interface IDeclaration
```
A declaration allows to modify the state and or behavior of an IFunctorCall. The IDeclaration is attached to an object owning an IFunctor and should be executed against the IFunctorCall prior to performing the call.
An example for a declaration is IArgumentDeclaration, allowing for argument naming and ordering and to provide default values when an argument is missing.
Syntax, semantics and application to the IFunctorCall of declarations are up to the client.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`IFunctorCall`	`accept(IFunctorCall call)`	Apply this declaration to `call`.
`java.lang.Object`	`getDeclarationContext()`	An optional declaration context.
`boolean`	`isBlock()`	`true` if this declaration has child elements itself.

- Method Detail
  - accept
```
IFunctorCall accept(IFunctorCall call)
             throws DeclarationException
```
    Apply this declaration to call.
    The semantics of this method is up to the designer.
    
    Parameters:
    
    call - The IFunctorCall to be modified.
    
    Returns:
    
    The modified or new IFunctorCall.
    
    Throws:
    
    DeclarationException
  - getDeclarationContext
```
java.lang.Object getDeclarationContext()
```
    An optional declaration context. This may be for example the object that will launch the IFunctorCall later and has parsed some declarations on startup.
    
    Returns:
    
    An optional declaration context.
  - isBlock
```
boolean isBlock()
```
    true if this declaration has child elements itself.
    A IDeclarationElement may be a IDeclarationBlock, supporting nested declarations. You should not use "instanceof IDeclarationBlock" to check this behavior but this method.
    
    Returns:
    
    true if this declaration has child elements itself.