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


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