bundles/org.simantics.db.common/src/org/simantics/db/common/procedure/single/wrapper/ExceptionToNullProcedure.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in 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  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.db.common.procedure.single.wrapper;
  13
  14 import org.simantics.db.AsyncReadGraph;
  15 import org.simantics.db.procedure.AsyncProcedure;
  16
  17 final public class ExceptionToNullProcedure<Result> implements AsyncProcedure<Result> {
  18
  19         final private AsyncProcedure<Result> procedure;
  20
  21     public ExceptionToNullProcedure(AsyncProcedure<Result> procedure) {
  22         this.procedure = procedure;
  23     }
  24
  25     @Override
  26     public void execute(AsyncReadGraph graph, Result result) {
  27         procedure.execute(graph, result);
  28     }
  29
  30
  31     @Override
  32     public void exception(AsyncReadGraph graph, Throwable t) {
  33         procedure.execute(graph, null);
  34     }
  35
  36     @Override
  37     public String toString() {
  38         return "ExceptionToNullProcedure -> " + procedure;
  39     }
  40
  41 }