bundles/org.simantics.db.common/src/org/simantics/db/common/primitiverequest/Value.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.primitiverequest;
  13
  14 import org.simantics.databoard.binding.Binding;
  15 import org.simantics.db.ReadGraph;
  16 import org.simantics.db.Resource;
  17 import org.simantics.db.common.request.BinaryRead;
  18 import org.simantics.db.exception.DatabaseException;
  19 import org.simantics.db.request.ReadExt;
  20 import org.simantics.db.request.RequestFlags;
  21
  22 final public class Value<T> extends BinaryRead<Resource, Binding, T> implements ReadExt {
  23
  24     public Value(Resource resource, Binding binding) {
  25         super(resource, binding);
  26     }
  27
  28     @Override
  29     public T perform(ReadGraph graph) throws DatabaseException {
  30         return graph.getValue(parameter, parameter2);
  31     }
  32
  33         @Override
  34         public boolean isImmutable(ReadGraph graph) throws DatabaseException {
  35                 return graph.isImmutable(parameter);
  36         }
  37
  38         @Override
  39         public int getType() {
  40                 return RequestFlags.INVALIDATE;
  41         }
  42
  43 }