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java.lang.Objectorg.apache.tapestry5.internal.services.AbstractSessionPersistentFieldStrategy
public abstract class AbstractSessionPersistentFieldStrategy
Base class for strategies that store their values as keys in the session. Implements a uniform format for the keys, based on a prefix to identify the particular strategy.
Constructor Summary | |
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protected |
AbstractSessionPersistentFieldStrategy(java.lang.String prefix,
Request request)
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Method Summary | |
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protected java.lang.Object |
convertApplicationValueToPersisted(java.lang.Object newValue)
Hook that allows a value to be converted as it is written to the session. |
protected java.lang.Object |
convertPersistedToApplicationValue(java.lang.Object persistedValue)
Converts a persisted value stored in the session back into an application value. |
protected void |
didReadChange(Session session,
java.lang.String attributeName)
Called after each key is read by gatherFieldChanges(String) . |
void |
discardChanges(java.lang.String pageName)
Discards any saved changes for the name page. |
java.util.Collection<PersistentFieldChange> |
gatherFieldChanges(java.lang.String pageName)
Finds all persistent changes previously stored for the named page (for the current active session or client). |
void |
postChange(java.lang.String pageName,
java.lang.String componentId,
java.lang.String fieldName,
java.lang.Object newValue)
Posts a change of a persistent property. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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protected AbstractSessionPersistentFieldStrategy(java.lang.String prefix, Request request)
Method Detail |
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public final java.util.Collection<PersistentFieldChange> gatherFieldChanges(java.lang.String pageName)
PersistentFieldStrategy
gatherFieldChanges
in interface PersistentFieldStrategy
public void discardChanges(java.lang.String pageName)
PersistentFieldStrategy
discardChanges
in interface PersistentFieldStrategy
pageName
- logical name of page whose field persistent data should be discardedprotected void didReadChange(Session session, java.lang.String attributeName)
gatherFieldChanges(String)
. This implementation does nothing,
subclasses may override.
session
- the session from which a value was just readattributeName
- the name of the attribute used to read a valuepublic final void postChange(java.lang.String pageName, java.lang.String componentId, java.lang.String fieldName, java.lang.Object newValue)
PersistentFieldStrategy
postChange
in interface PersistentFieldStrategy
pageName
- the name of the page containing the componentcomponentId
- the nested id path of the component (or null for the page's root component)fieldName
- the name of the field whose persistent value has changednewValue
- the new value for the field, possibly nullprotected java.lang.Object convertApplicationValueToPersisted(java.lang.Object newValue)
newValue
- non-null value
convertPersistedToApplicationValue(Object)
protected java.lang.Object convertPersistedToApplicationValue(java.lang.Object persistedValue)
persistedValue
- non-null persisted value
convertPersistedToApplicationValue(Object)
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