bundles/org.simantics.db.services/src/org/simantics/db/services/adaption/reflection/AdaptingDynamicAdapter2.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2010 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.db.services.adaption.reflection;\r
  13 \r
  14 import java.util.ArrayList;\r
  15 import java.util.Collection;\r
  16 \r
  17 import org.simantics.db.ReadGraph;\r
  18 import org.simantics.db.Resource;\r
  19 import org.simantics.db.exception.AdaptionException;\r
  20 import org.simantics.db.exception.DatabaseException;\r
  21 \r
  22 public class AdaptingDynamicAdapter2 implements IDynamicAdapter2 {\r
  23 \r
  24     IDynamicAdapter2 adapter;\r
  25     Class<?> targetType;\r
  26 \r
  27     public AdaptingDynamicAdapter2(IDynamicAdapter2 adapter, Class<?> targetType) {\r
  28         this.adapter = adapter;\r
  29         this.targetType = targetType;\r
  30     }\r
  31 \r
  32     @Override\r
  33     public Object adapt(ReadGraph g, Resource r) throws DatabaseException {\r
  34         Object obj = adapter.adapt(g, r);\r
  35         if(obj == null)\r
  36             return null;\r
  37         if(obj instanceof Resource)\r
  38             return g.adapt((Resource)obj, targetType);\r
  39         if(obj instanceof Collection<?>) {\r
  40             Collection<?> c = (Collection<?>)obj;\r
  41             Collection<Object> ret = new ArrayList<Object>(c.size());\r
  42             for(Object o : c)\r
  43                 ret.add(g.adapt((Resource)o, targetType));\r
  44             return ret;\r
  45         }\r
  46         throw new AdaptionException("Invalid type.");\r
  47     }\r
  48 \r
  49     @Override\r
  50     public Class<?> getType() throws DatabaseException {\r
  51         if(adapter.getType().equals(Resource.class))\r
  52             return targetType;\r
  53         else if(adapter.getType().equals(Collection.class))\r
  54             return Collection.class;\r
  55         else\r
  56             throw new AdaptionException("Invalid type.");\r
  57     }\r
  58 \r
  59 }\r