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Java Source Code / Java Documentation » Library » Tapestry » org.apache.tapestry

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Class Diagram

Java Document (Java Doc)

org.apache.tapestry .ValueEncoder

ValueEncoder
public interface ValueEncoder (Code)
	Used by Select (and similar components) to encode server side values into client-side strings, and back. Most often a custom implementation is needed for entity type objects, where the ValueEncoder.toClient(Object) method extracts a primary key, and the ValueEncoder.toValue(String) re-acquires the corresponding entity object. See Also: SelectModel

Method Summary
String	toClient(V value) Converts a value into a client-side representation.
V	toValue(String clientValue) Converts a client-side representation, provided by ValueEncoder.toClient(Object) , back into a server-side value.

Method Detail

toClient
String toClient(V value)(Code)
	Converts a value into a client-side representation. The value should be parseable by ValueEncoder.toValue(String) . In some cases, what is returned is an identifier used to locate the true object, rather than a string representation of the value itself. Parameters: value - to be encoded a string representation of the value, or the value's identity

toValue
V toValue(String clientValue)(Code)
	Converts a client-side representation, provided by ValueEncoder.toClient(Object) , back into a server-side value. Parameters: clientValue - string representation of the value's identity the corresponding entity, or null if not found

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