Package org.apache.tapestry5
Interface NullFieldStrategy
- All Known Implementing Classes:
DefaultNullFieldStrategy
,ZeroNullFieldStrategy
public interface NullFieldStrategy
Defines a strategy, used by
Field
components such as 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.- See Also:
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Method Summary
Modifier and TypeMethodDescriptionProvides a replacement value for a null or blank string passed from the client to the server as part of a form submission.Provides a replacement value for null, when converting the server-side object to a client-side string.
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Method Details
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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 toTranslator.toClient(Object)
. -
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 toTranslator.parseClient(Field, String, String)
as if it were the value supplied by the user.- Returns:
- replacement value (this must not be null)
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