bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/widgets/IdentityFactory.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2012 Association for Decentralized Information Management\r
   3  * in Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.browsing.ui.swt.widgets;\r
  13 \r
  14 import org.eclipse.jface.viewers.ISelection;\r
  15 import org.simantics.browsing.ui.swt.widgets.impl.ReadFactory;\r
  16 import org.simantics.db.management.ISessionContext;\r
  17 import org.simantics.db.procedure.Listener;\r
  18 import org.simantics.utils.ReflectionUtils;\r
  19 import org.simantics.utils.ui.ISelectionUtils;\r
  20 \r
  21 \r
  22 public class IdentityFactory<T> implements ReadFactory<T, T> {\r
  23 \r
  24         final Class<?> inputClass;\r
  25         \r
  26         public IdentityFactory() {\r
  27                 inputClass = ReflectionUtils.getSingleParameterType(getClass());\r
  28         }\r
  29         \r
  30         @SuppressWarnings("unchecked")\r
  31         @Override\r
  32         public void listen(ISessionContext context, Object input, Listener<T> listener) {\r
  33                 \r
  34                 final Object inputContents = ISelectionUtils.filterSingleSelection((ISelection)input, inputClass);\r
  35                 listener.execute((T)inputContents);\r
  36                 \r
  37         }\r
  38 \r
  39         \r
  40 }\r