bundles/org.simantics.databoard/src/org/simantics/databoard/binding/factory/BindingRepository.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2011 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.databoard.binding.factory;\r
  13 \r
  14 import java.util.HashMap;\r
  15 import java.util.Map;\r
  16 import java.util.Map.Entry;\r
  17 \r
  18 import org.simantics.databoard.binding.Binding;\r
  19 import org.simantics.databoard.binding.reflection.BindingRequest;\r
  20 \r
  21 public class BindingRepository {\r
  22         \r
  23         /**\r
  24          * This map contains all the bindings\r
  25          */\r
  26         Map<BindingRequest, Binding> requestMap;\r
  27         \r
  28         /**\r
  29          * This map contains bindings for non-generic classes. \r
  30          */\r
  31         Map<Class<?>, Binding> classMap;\r
  32         \r
  33         public BindingRepository() {            \r
  34                 requestMap = new HashMap<BindingRequest, Binding>();\r
  35                 classMap = new HashMap<Class<?>, Binding>();\r
  36         }\r
  37         \r
  38         public BindingRepository(Map<BindingRequest, Binding> requests) {\r
  39                 this.requestMap = requests;\r
  40                 for (Entry<BindingRequest, Binding> e : requests.entrySet()) {\r
  41                         if ( isClassRequest( e.getKey() ) ) {\r
  42                                 classMap.put(e.getKey().getClazz(), e.getValue());\r
  43                         }\r
  44                 }\r
  45         }\r
  46         \r
  47         /**\r
  48          * Get binding for a class. May return the class if it is in the class map.\r
  49          * If not, the user should try request map with some arguments (component bindings)\r
  50          * \r
  51          * @param clazz\r
  52          * @return binding\r
  53          */\r
  54         public synchronized Binding get(Class<?> clazz) {\r
  55                 return classMap.get( clazz );\r
  56         }\r
  57         \r
  58         /**\r
  59          * Get binding for a binding request\r
  60          * \r
  61          * @param request\r
  62          * @return binding or null\r
  63          */\r
  64         public synchronized Binding get( BindingRequest request ) {\r
  65                 return requestMap.get( request );\r
  66         }\r
  67         \r
  68         /**\r
  69          * Adds binding to the repository. If the request has no arguments, the \r
  70          * class is added to classMap, and is available with class request.  \r
  71          * \r
  72          * @param request\r
  73          * @param binding\r
  74          */\r
  75         public synchronized void put( BindingRequest request, Binding binding ) {\r
  76                 if ( isClassRequest(request) ) {\r
  77                         classMap.put( request.getClazz(), binding );\r
  78                 }\r
  79                 requestMap.put( request, binding );\r
  80         }\r
  81         \r
  82         public synchronized void remove(Binding binding) {\r
  83                 for (Entry<BindingRequest, Binding> e : requestMap.entrySet()) {\r
  84                         if (e.getValue() == binding) {\r
  85                                 requestMap.remove(e.getValue());\r
  86                                 break;\r
  87                         }\r
  88                 }\r
  89                 \r
  90                 for (Entry<Class<?>, Binding> e : classMap.entrySet()) {\r
  91                         if (e.getValue() == binding) {\r
  92                                 classMap.remove(e.getValue());\r
  93                                 break;\r
  94                         }\r
  95                 }\r
  96 }\r
  97         \r
  98         public synchronized boolean containsRequest( BindingRequest request ) {\r
  99                 return requestMap.containsKey( request );\r
 100         }\r
 101         \r
 102         /**\r
 103          * Checks if repository contains a class without arguments\r
 104          * \r
 105          * @param clazz \r
 106          * @return true if contains class (without args)\r
 107          */\r
 108         public synchronized boolean containsClass( Class<?> clazz ) {\r
 109                 return classMap.containsKey( clazz );\r
 110         }\r
 111         \r
 112         public synchronized void clear() {\r
 113                 requestMap.clear();\r
 114                 classMap.clear();\r
 115         }\r
 116 \r
 117         boolean isClassRequest( BindingRequest request )\r
 118         {\r
 119                 return request.className != null && (request.annotations==null || request.annotations.length==0);\r
 120         }\r
 121 \r
 122 }\r