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

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2012 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.browsing.ui.swt.widgets;
  13
  14 import org.eclipse.jface.viewers.ISelection;
  15 import org.simantics.browsing.ui.swt.widgets.impl.ReadFactory;
  16 import org.simantics.db.management.ISessionContext;
  17 import org.simantics.db.procedure.Listener;
  18 import org.simantics.utils.ReflectionUtils;
  19 import org.simantics.utils.ui.ISelectionUtils;
  20
  21
  22 public class IdentityFactory<T> implements ReadFactory<T, T> {
  23
  24         final Class<?> inputClass;
  25
  26         public IdentityFactory() {
  27                 inputClass = ReflectionUtils.getSingleParameterType(getClass());
  28         }
  29
  30         @SuppressWarnings("unchecked")
  31         @Override
  32         public void listen(ISessionContext context, Object input, Listener<T> listener) {
  33
  34                 final Object inputContents = ISelectionUtils.filterSingleSelection((ISelection)input, inputClass);
  35                 listener.execute((T)inputContents);
  36
  37         }
  38
  39
  40 }