org.apache.tapestry5.services
Interface PersistentFieldBundle

All Known Implementing Classes:

PersistentFieldBundleImpl

public interface PersistentFieldBundle

Encapsulates persisted property information for an entire page.

Method Summary

boolean	containsValue(String componentId, String fieldName) Checks to see if a persistent value has been stored for the indicated component and field.
Object	getValue(String componentId, String fieldName)

Method Detail

containsValue

boolean containsValue(String componentId,
                      String fieldName)

Checks to see if a persistent value has been stored for the indicated component and field. TODO: This method can probably be removed; it doesn't look like its used (instead, we if check getValue() returns null).

Parameters:

componentId - the nested id of the component (within the page), may be null or blank for the root component of the page

fieldName - the name of the field whose value was persisted

Returns:

true if a change has been stored

getValue

Object getValue(String componentId,
                String fieldName)

Parameters:

componentId - the nested if of the component (within the page), may be null or blank for the root component of the page

fieldName - the name of the field whose value was persisted

Returns:

the persisted value, possibly null