SystemDataConsumer (AristaFlow Business Process Platform API)

```
@Retention(RUNTIME)
@Target(METHOD)
public @interface SystemDataConsumer
```
This annotation marks a method of the processmodel (with no arguments and return type String) to be able to read a system data element via a node parameter. The returned string contains variables (and their corresponding declarations) which lead to a node parameter at modelling time. At runtime this is replaced by the value of the corresponding node parameter.
For PluginData this annotation is also placed at a method of a plugin viewer interface. In this case the annotation does not refer to the return value directly but to the underlying string-representation of the value (Attribute).
Variables are surrounded and declared by the character %. Only the types INTEGER, FLOAT and STRING (cf. ProcessConstants.AdeptDataType) for variables are supported. In the declaration the symbols i or I (for INTEGER), f or F (for FLOAT) and s or S (for STRING) are used. For instance %i:var1% declares the variable var1 of type INTEGER. Please note that there are no spaces between the type and the name of the variable. The variable name may contain any character, although each % must be escaped (i.e. typed twice).
The class SystemDataTools provides some tool methods.

Author:

Ulrich Kreher

Optional Element Summary

Optional Elements
Modifier and Type	Optional Element	Description
`Class<? extends SystemDataFormatter>`	`formatter`	The formatter class responsible for replacing parameter references with their actual values.

- Element Detail
  - formatter
```
Class<? extends SystemDataFormatter> formatter
```
    The formatter class responsible for replacing parameter references with their actual values.
    
    Returns:
    
    formatter class responsible for replacing parameter references with their actual values
    
    Default:
    
    de.aristaflow.adept2.model.common.systemdata.BasicSystemDataFormatter.class