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

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