/*******************************************************************************
 * Copyright (c) 2007- VTT Technical Research Centre of Finland.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     VTT Technical Research Centre of Finland - initial API and implementation
 *******************************************************************************/
package org.simantics.proconf.g3d.actions;

import org.simantics.db.Graph;
import org.simantics.db.GraphRequest;
import org.simantics.db.GraphRequestAdapter;
import org.simantics.db.GraphRequestStatus;
import org.simantics.db.Session;
import org.simantics.proconf.g3d.base.ThreeDimensionalEditorBase;

public abstract class ReadAction extends ContextAction {
	boolean sync;
	public ReadAction(ThreeDimensionalEditorBase parent, boolean sync) {
		super(parent);
		this.sync = sync;
	}

	@Override
	public final void run() {
		Session session = parent.getSession();
		if(!canActivate()) {
			return;
		}
		GraphRequest r = new GraphRequestAdapter() {
			@Override
			public GraphRequestStatus perform(Graph g) throws Exception {
				doChanges(g);
				return GraphRequestStatus.transactionComplete();
			}
		};
		if (sync) {
			session.syncRead(r);
		} else {
			session.asyncRead(r);
		} 
	}
	
	public abstract void doChanges(Graph graph) throws Exception;

	public boolean canActivate() {
		return true;
	}
}