/**
* Copyright 2004-2016 Riccardo Solmi. All rights reserved.
* This file is part of the Whole Platform.
*
* The Whole Platform is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The Whole Platform is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the Whole Platform. If not, see <http://www.gnu.org/licenses/>.
*/
package org.whole.lang.e4.ui.handler;
import javax.inject.Named;
import org.eclipse.e4.core.contexts.IEclipseContext;
import org.eclipse.e4.core.di.annotations.CanExecute;
import org.eclipse.e4.core.di.annotations.Execute;
import org.eclipse.e4.core.di.annotations.Optional;
import org.eclipse.e4.ui.services.IServiceConstants;
import org.whole.lang.bindings.BindingManagerFactory;
import org.whole.lang.bindings.IBindingManager;
import org.whole.lang.bindings.ITransactionScope;
import org.whole.lang.e4.ui.jobs.ISynchronizableRunnable;
import org.whole.lang.ui.viewers.IEntityPartViewer;
/**
* @author Enrico Persiani
*/
public abstract class OperationHandler {
@CanExecute
public boolean canExecute(@Optional @Named(IServiceConstants.ACTIVE_SELECTION) IBindingManager bm) throws Exception {
ITransactionScope ts = BindingManagerFactory.instance.createTransactionScope();
try {
bm.wEnterScope(ts);
IEntityPartViewer viewer = (IEntityPartViewer) bm.wGetValue("viewer");
return !viewer.getEditDomain().isDisabled() && isEnabled(bm);
} catch (Exception e) {
return false;
} finally {
ts.rollback();
bm.wExitScope();
}
}
@Execute
public void execute(@Optional @Named(IServiceConstants.ACTIVE_SELECTION) IBindingManager bm,
IEclipseContext context) throws Exception {
createRunnable(bm, context).asyncExec("Executing "+getLabel(bm)+" operation...");
}
protected abstract boolean isEnabled(IBindingManager bm);
protected abstract ISynchronizableRunnable createRunnable(IBindingManager bm, IEclipseContext context);
protected abstract String getLabel(IBindingManager bm);
}