org.apache.tapestry5: public interface: NullFieldStrategy

org.apache.tapestry5
public interface: NullFieldStrategy [javadoc | source]

All Known Implementing Classes:
DefaultNullFieldStrategy, ZeroNullFieldStrategy

Defines a strategy, used by Field components such as org.apache.tapestry5.corelib.components.TextField , to handle the case where either the server-side value to be sent (as a string) to the client, or the client-side string passed back up to the server, is null or blank.

Also see:

org.apache.tapestry5.services.NullFieldStrategySource

Method from org.apache.tapestry5.NullFieldStrategy Summary:
replaceFromClient, replaceToClient

Method from org.apache.tapestry5.NullFieldStrategy Detail:
public String replaceFromClient() Provides a replacement value for a null or blank string passed from the client to the server as part of a form submission. This replacement value will be passed to Translator#parseClient(Field, String, String) as if it were the value supplied by the user.
public Object replaceToClient() Provides a replacement value for null, when converting the server-side object to a client-side string. The replacement value, if non-null, will be passed to org.apache.tapestry5.Translator#toClient(Object) .

Method from org.apache.tapestry5.NullFieldStrategy Detail:

 public String replaceFromClient()Provides a replacement value for a null or blank string passed from the client to the server as part of a form
submission. This replacement value will be passed to Translator#parseClient(Field, String, String)   as if
it were the value supplied by the user.

 public Object replaceToClient()Provides a replacement value for null, when converting the server-side object to a client-side string. The
replacement value, if non-null, will be passed to org.apache.tapestry5.Translator#toClient(Object) .