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/*******************************************************************************
 * Copyright (c) 2012 Boeing.
 * 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:
 *     Boeing - initial API and implementation
 *******************************************************************************/
package org.eclipse.osee.orcs.core.internal.util;

import java.util.concurrent.Callable;
import java.util.concurrent.FutureTask;
import org.eclipse.osee.framework.core.data.LazyObject;
import org.eclipse.osee.framework.core.exception.OseeCoreException;
import org.eclipse.osee.orcs.core.ds.HasOrcsData;
import org.eclipse.osee.orcs.core.ds.OrcsData;

/**
 * @author Roberto E. Escobar
 */
public abstract class OrcsLazyObject<T, D extends OrcsData> extends LazyObject<T> implements HasOrcsData<D> {

   private D data;

   public OrcsLazyObject(D data) {
      super();
      this.data = data;
   }

   @Override
   public D getOrcsData() {
      return data;
   }

   @Override
   public void setOrcsData(D data) {
      invalidate();
      this.data = data;
   }

   @Override
   protected final FutureTask<T> createLoaderTask() {
      Callable<T> callable = new Callable<T>() {
         @Override
         public T call() throws Exception {
            return instance();
         }
      };
      return new FutureTask<T>(callable);
   }

   protected abstract T instance() throws OseeCoreException;

}