bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/variable/VariableRepository.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.layer0.variable;
  13
  14 import java.util.HashMap;
  15 import java.util.Map;
  16
  17 import org.simantics.db.ReadGraph;
  18 import org.simantics.db.exception.DatabaseException;
  19 import org.simantics.db.layer0.exception.MissingVariableException;
  20
  21 final public class VariableRepository {
  22
  23         final private static HashMap<String, Variable> repository = new HashMap<String, Variable>();
  24
  25         public static synchronized void register(String uri, Variable variable) {
  26                 repository.put(uri, variable);
  27         }
  28
  29         public static synchronized void unregister(String uri) {
  30                 repository.remove(uri);
  31         }
  32
  33         public static synchronized Variable get(ReadGraph graph, String uri) throws DatabaseException {
  34                 for(Map.Entry<String, Variable> e : repository.entrySet()) {
  35                         if(uri.startsWith(e.getKey())) {
  36                                 return e.getValue().browse(graph, uri.substring(e.getKey().length()));
  37                         }
  38                 }
  39                 throw new MissingVariableException(uri, null);
  40         }
  41
  42         public static void clear() {
  43             repository.clear();
  44         }
  45
  46 }