bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/adapter/impl/FailingRemover.java

   1 /*******************************************************************************
   2  * Copyright (c) 2013 Association for Decentralized Information Management in
   3  * Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     Semantum Oy - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.db.layer0.adapter.impl;
  13
  14 import org.simantics.db.ReadGraph;
  15 import org.simantics.db.WriteGraph;
  16 import org.simantics.db.exception.DatabaseException;
  17 import org.simantics.db.layer0.adapter.Remover;
  18
  19 /**
  20  * A {@link Remover} implementation that never allows removal. It uses the
  21  * provided String as a reason for not allowing removal in
  22  * {@link #canRemove(ReadGraph, java.util.Map)}
  23  *
  24  * @author Tuukka Lehtonen
  25  */
  26 public class FailingRemover implements Remover {
  27
  28         String reason;
  29
  30         public FailingRemover(String reason) throws DatabaseException {
  31                 this.reason = reason;
  32         }
  33
  34         public String canRemove(ReadGraph graph, java.util.Map<Object,Object> aux) {
  35                 return reason;
  36         };
  37
  38         @Override
  39         public void remove(WriteGraph graph) throws DatabaseException {
  40         }
  41
  42 }