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package javax.faces.component;
/**
* <p class="changed_added_2_0">
* Components that want to leverage the partial state saving feature must implement this interface
* instead of implementing {@link StateHolder}, from which this interface inherits.
* </p>
*
* @since 2.0
*/
public interface PartialStateHolder extends StateHolder {
/**
* <p class="changed_added_2_0">
* The runtime must ensure that the {@link #markInitialState} method is called on each instance
* of this interface in the view at the appropriate time to indicate the component is in its
* initial state. The implementor of the interface must ensure that {@link #initialStateMarked}
* returns <code>true</code> from the time <code>markInitialState()</code> is called until
* {@link #clearInitialState} is called, after which time <code>initialStateMarked()</code> must
* return <code>false</code>. Also, during the time that the instance returns <code>true</code>
* from <code>initialStateMarked()</code>, the implementation must return only the state that
* has changed in its implementation of {@link StateHolder#saveState}.
* </p>
*
* @since 2.0
*/
void markInitialState();
/**
* <p class="changed_added_2_0">
* Return <code>true</code> if delta state changes are being tracked, otherwise
* <code>false</code>
* </p>
*
* @return <code>true</code> if the initial state is marked, <code>false</code> otherwise.
* @since 2.0
*/
boolean initialStateMarked();
/**
* <p class="changed_added_2_0">
* Reset the PartialStateHolder to a non-delta tracking state.
* </p>
*
* @since 2.0
*/
void clearInitialState();
}