bundles/org.simantics.db.common/src/org/simantics/db/common/request/BinaryParametrizedRead.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.request;
  13
  14 import org.simantics.db.ReadGraph;
  15 import org.simantics.db.exception.DatabaseException;
  16 import org.simantics.db.request.Read;
  17
  18 public abstract class BinaryParametrizedRead<P, C, C2, R> implements ParametrizedRead<P, R> {
  19
  20     final protected C constant;
  21     final protected C2 constant2;
  22
  23     public BinaryParametrizedRead(C constant, C2 constant2) {
  24         this.constant = constant;
  25         this.constant2 = constant2;
  26     }
  27
  28         abstract public R perform(ReadGraph graph, P parameter) throws DatabaseException;
  29
  30         @Override
  31         public Read<R> get(P parameter) {
  32                 return new TernaryRead<P, C, C2, R>(parameter, constant, constant2) {
  33
  34                         @Override
  35                         public R perform(ReadGraph graph) throws DatabaseException {
  36                                 return BinaryParametrizedRead.this.perform(graph, parameter);
  37                         }
  38
  39                 };
  40         }
  41
  42 }