Example usage for org.eclipse.jface.commands PersistentState setShouldPersist

Introduction

In this page you can find the example usage for org.eclipse.jface.commands PersistentState setShouldPersist.

Prototype

public void setShouldPersist(final boolean persisted) 

Source Link

Document

Sets whether this state should be persisted.

Usage

From source file:org.eclipse.ui.internal.commands.CommandStateProxy.java

License:Open Source License

/**
 * Loads the state, if possible. If the state is loaded, then the member
 * variables are updated accordingly and the state is told to load its value
 * from the preference store./*  ww  w  .  ja  v  a2s. c  om*/
 * 
 * @param readPersistence
 *            Whether the persistent state for this object should be read.
 * @return <code>true</code> if the state is now non-null;
 *         <code>false</code> otherwise.
 */
private final boolean loadState(final boolean readPersistence) {
    if (state == null) {
        try {
            state = (State) configurationElement.createExecutableExtension(stateAttributeName);
            state.setId(getId());
            configurationElement = null;

            // Try to load the persistent state, if possible.
            if (readPersistence && state instanceof PersistentState) {
                final PersistentState persistentState = (PersistentState) state;
                persistentState.setShouldPersist(true);
            }
            load(preferenceStore, preferenceKey);

            // Transfer the local listeners to the real state.
            final Object[] listenerArray = getListeners();
            for (int i = 0; i < listenerArray.length; i++) {
                state.addListener((IStateListener) listenerArray[i]);
            }
            clearListeners();

            return true;

        } catch (final ClassCastException e) {
            final String message = "The proxied state was the wrong class"; //$NON-NLS-1$
            final IStatus status = new Status(IStatus.ERROR, WorkbenchPlugin.PI_WORKBENCH, 0, message, e);
            WorkbenchPlugin.log(message, status);
            return false;

        } catch (final CoreException e) {
            final String message = "The proxied state for '" //$NON-NLS-1$
                    + configurationElement.getAttribute(stateAttributeName) + "' could not be loaded"; //$NON-NLS-1$
            IStatus status = new Status(IStatus.ERROR, WorkbenchPlugin.PI_WORKBENCH, 0, message, e);
            WorkbenchPlugin.log(message, status);
            return false;
        }
    }

    return true;
}

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