Precondition (ecp-parent 1.27.0-SNAPSHOT API)

```
@Target(TYPE)
@Retention(RUNTIME)
public @interface Precondition
```
Annotation to allow Vendors to specify a Precondition, which must be present in the BazaarContext. A Precondition specifies a key and a value, This key value pair must be present in the BazaarContext, otherwise the Vendor is not asked for a Bid.

Author:

jonas

- Field Summary
  
  Fields
  Modifier and Type Fields Description
  
  static java.lang.String UNASSIGNED
  default for values.
- Required Element Summary
  
  Required Elements
  Modifier and Type Required Element Description
  
  java.lang.String key
- Optional Element Summary
  
  Optional Elements
  Modifier and Type Optional Element Description
  
  java.lang.String value

- Field Detail
  - UNASSIGNED
```
static final java.lang.String UNASSIGNED
```
    default for values. If no value is used, just the existence of the key is checked.
- Element Detail
  - key
```
java.lang.String key
```
    Returns:
    
    the key to be present in the BazaarContext
- - value
```
java.lang.String value
```
    Returns:
    
    the value to be present in the BazaarContext under the specified key. Default is Precondition.UNASSIGNED
    
    Default:
    
    "[unassigned]"