package eu.fbk.knowledgestore.datastore;
   
   import java.io.IOException;
   
   import com.google.common.collect.ForwardingObject;
   
   /**
    * A {@code DataStore} forwarding all its method calls to another {@code DataStore}.
    * <p>
   * This class provides a starting point for implementing the decorator pattern on top of the
   * {@code DataStore} interface. Subclasses must implement method {@link #delegate()} and override
   * the methods of {@code DataStore} they want to decorate.
   * </p>
   */
  public abstract class ForwardingDataStore extends ForwardingObject implements DataStore {
  
      @Override
      protected abstract DataStore delegate();
  
      @Override
      public void init() throws IOException {
          delegate().init();
      }
  
      @Override
      public DataTransaction begin(final boolean readOnly) throws IOException, IllegalStateException {
          return delegate().begin(readOnly);
      }
  
      @Override
      public void close() {
          delegate().close();
      }
  
  }