org.simantics.g3d/src/org/simantics/g3d/tools/AdaptationUtils.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2012, 2013 Association for Decentralized Information Management in\r
   3  * 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.g3d.tools;\r
  13 \r
  14 import java.util.ArrayList;\r
  15 import java.util.Collection;\r
  16 import java.util.Collections;\r
  17 \r
  18 import org.eclipse.core.runtime.IAdaptable;\r
  19 import org.eclipse.jface.viewers.IStructuredSelection;\r
  20 import org.simantics.utils.Container;\r
  21 \r
  22 /**\r
  23  * @author Antti Villberg\r
  24  * @author Marko Luukkainen\r
  25  * \r
  26  * TODO: merge to os.ui.utils.\r
  27  */\r
  28 public class AdaptationUtils {\r
  29         /**\r
  30          * \r
  31          * @param o\r
  32          * @param clazz\r
  33          * @return object of given class or null\r
  34          */\r
  35         @SuppressWarnings("unchecked")\r
  36         public static <T> T adaptToSingle(Object o, Class<T> clazz) {\r
  37                 if (o instanceof IStructuredSelection) {\r
  38                         IStructuredSelection iss = (IStructuredSelection) o;\r
  39                         if (iss.size() != 1)\r
  40                                 return null;\r
  41                         Object element = iss.getFirstElement();\r
  42                         return adaptToSingle(element, clazz);\r
  43                 } else if (o instanceof Collection<?>) {\r
  44                         Collection<?> c = (Collection<?>) o;\r
  45                         if (c.size() != 1)\r
  46                                 return null;\r
  47                         Object element = c.iterator().next();\r
  48                         return adaptToSingle(element, clazz);\r
  49                 } else if (o instanceof IAdaptable) {\r
  50                         IAdaptable a = (IAdaptable) o;\r
  51                         return (T)a.getAdapter(clazz);\r
  52                 } else if (clazz.isInstance(o)) {\r
  53                         return (T)o;\r
  54                 } else if (o instanceof Container<?>) {\r
  55                         Object obj = ((Container<?>) o).get();\r
  56                         if (obj == o)\r
  57                                 return null;\r
  58                         return adaptToSingle(obj, clazz);\r
  59                 }\r
  60                 return null;\r
  61         }\r
  62         /**\r
  63          * \r
  64          * @param o\r
  65          * @param clazz\r
  66          * @return collection of objects of given class. \r
  67          */\r
  68         @SuppressWarnings("unchecked")\r
  69         public static <T> Collection<T> adaptToCollection(Object o, Class<T> clazz) {\r
  70                 if (clazz.isInstance(o)) {\r
  71                         return Collections.singletonList((T)o);\r
  72                 } else if (o instanceof IStructuredSelection) {\r
  73                         IStructuredSelection iss = (IStructuredSelection) o;\r
  74                         return adaptToCollection(iss.toArray(), clazz);\r
  75                 } else if (o instanceof Collection<?>) {\r
  76                         Collection<?> c = (Collection<?>) o;\r
  77                         return adaptToCollection(c.toArray(), clazz);\r
  78                 } else if (o instanceof IAdaptable) {\r
  79                         IAdaptable a = (IAdaptable) o;\r
  80                         return Collections.singletonList((T)a.getAdapter(clazz));\r
  81                 } else if (o instanceof Container<?>) {\r
  82                         Object obj = ((Container<?>) o).get();\r
  83                         if (obj == o)\r
  84                                 return Collections.EMPTY_LIST;\r
  85                         return adaptToCollection(obj, clazz);\r
  86                 }\r
  87                 return Collections.EMPTY_LIST;\r
  88         }\r
  89         \r
  90         public static <T> Collection<T> adaptToCollection(Object arr[], Class<T> clazz) {\r
  91                 Collection<T> result = new ArrayList<T>();\r
  92                 for (Object o : arr) {\r
  93                         Collection<T> tColl = adaptToCollection(o, clazz); \r
  94                         for (T t : tColl)\r
  95                                 if (t != null && !result.contains(t))\r
  96                                         result.add(t);\r
  97                 }\r
  98                 return result;\r
  99         }\r
 100 }\r