IHostFieldData (IIZI - 2.1.0.15885 Java API Specification)

```
public interface IHostFieldData
```
Interface to implement for custom classes for the field processing used to getting/setting host field and providing conversion/mapping/translation support.
Author:
Christopher Mindus

Method Summary

All Methods Instance Methods Default Methods
Modifier and Type	Method	Description
`default java.lang.String`	`convertFromVSField(HostSession hostSession, ScreenFieldProp screenField, VSField vsField, java.lang.String stringValue)`	Converts a single string from the VSField (or its value) to a host string that will be set.

- Method Detail
  - convertFromVSField
```
default java.lang.String convertFromVSField(HostSession hostSession,
                                            ScreenFieldProp screenField,
                                            VSField vsField,
                                            java.lang.String stringValue)
```
    Converts a single string from the VSField (or its value) to a host string that will be set. This method can be called frequently and should be very fast.
    Parameters:
    hostSession - The host session.
    screenField - The screen field.
    vsField - The VirtualSpace field.
    stringValue - The String value of the VSField, already translated.
    Returns:
    The String to set the screen host field with, or null to avoid setting anything. The default is to return the stringValue.