luz2/src/test/com/lavans/luz2/util2/InstanceManager.java

   1 /* $Id: InstanceManager.java 415 2011-07-28 23:07:08Z dobashi $\r
   2  * created: 2005/09/30\r
   3  */\r
   4 package test.com.lavans.luz2.util2;\r
   5 \r
   6 import java.lang.reflect.Constructor;\r
   7 import java.util.HashMap;\r
   8 import java.util.Map;\r
   9 \r
  10 import javax.xml.xpath.XPathExpressionException;\r
  11 \r
  12 import org.apache.commons.logging.Log;\r
  13 import org.apache.commons.logging.LogFactory;\r
  14 import org.w3c.dom.Element;\r
  15 import org.w3c.dom.Node;\r
  16 import org.w3c.dom.NodeList;\r
  17 \r
  18 import com.lavans.luz2.util.Config;\r
  19 \r
  20 /**\r
  21  * @deprecated\r
  22  * @author dobashi\r
  23  */\r
  24 public class InstanceManager {\r
  25         /** ロガー。debug用 */\r
  26         private static Log logger = LogFactory.getLog(InstanceManager.class);\r
  27 \r
  28         private static Config config = Config.getInstance("luz.xml");\r
  29         private static String SERVICE_ROOT ="instance_manager";\r
  30         private static String BEAN = "bean";\r
  31         private static String ID = "id";\r
  32         private static String CLASS = "class";\r
  33         private static String SCOPE = "scope";\r
  34 \r
  35         /** idとクラス名を保管 */\r
  36         private static Map<String, Bean> beanMap = new HashMap<String, Bean>();\r
  37 \r
  38         static{\r
  39                 init();\r
  40         }\r
  41         /**\r
  42          * 初期化。\r
  43          * 設定ファイルを読み込む。\r
  44          *\r
  45          */\r
  46         public static void init(){\r
  47                 NodeList list=null;\r
  48                 try {\r
  49                         list = config.getNodeList(SERVICE_ROOT);\r
  50                 } catch (XPathExpressionException e) {\r
  51                 }\r
  52 \r
  53                 // 指定無しの場合はなにもしない。\r
  54                 if(list==null){\r
  55                         return;\r
  56                 }\r
  57 \r
  58                 // rootノード(=Midget)\r
  59                 // 各設定情報を取得\r
  60                 for(int i=0; i<list.getLength(); i++){\r
  61                         Node node = list.item(i);\r
  62 //                      System.out.println(node.getNodeName());\r
  63                         // テキストノードは無視\r
  64 //                      if((node.getNodeType()==Node.TEXT_NODE) ||\r
  65 //                         (node.getNodeType()==Node.COMMENT_NODE) ){\r
  66 //                              continue;\r
  67 //                      }\r
  68 \r
  69                         if(node.getNodeName().equals(BEAN)){\r
  70                                 Element ele = (Element)node;\r
  71                                 Bean bean = new Bean();\r
  72                                 bean.id = ele.getAttribute(ID);\r
  73                                 bean.className = ele.getAttribute(CLASS);\r
  74                                 bean.scope = ele.getAttribute(SCOPE);\r
  75 \r
  76                                 beanMap.put(bean.id, bean);\r
  77                         }else{\r
  78                                 logger.info("無効な設定項目["+ node.getNodeName() +"]");\r
  79                         }\r
  80                 }\r
  81         }\r
  82 \r
  83         /**\r
  84          * 個別指定のサービスクラス名を返す。\r
  85          * 未指定なら引数で渡されたクラス名でインスタンス化する。\r
  86          * 失敗した場合はnull。\r
  87          * クラス名をFQDNで渡す。\r
  88          *\r
  89          * @author dobashi\r
  90          */\r
  91         public static <T> T getInstance(Class<T> clazz){\r
  92                 return getInstance(clazz.getName(), clazz);\r
  93         }\r
  94         public static <T> T getInstance(String id){\r
  95                 return getInstance(id, null);\r
  96         }\r
  97         public static <T> T getInstance(String id, Class<T> clazz){\r
  98                 Bean bean = beanMap.get(id);\r
  99                 // 指定されたIDで取れない場合のデフォルト\r
 100                 if(bean==null && clazz!=null){\r
 101                         // class型指定ありならfullクラス名\r
 102                         bean = beanMap.get(clazz.getName());\r
 103                         // デフォルトのimplを探す\r
 104                         if(bean==null){\r
 105                                 String pkgNname = clazz.getName().substring(0, clazz.getName().lastIndexOf('.'));\r
 106 //                              String className = pkgNname+".impl."+clazz.getSimpleName()+"Impl";\r
 107                                 String className = clazz.getName();\r
 108                                 bean = new Bean();\r
 109                                 bean.id = id;\r
 110                                 bean.className = className;\r
 111                         }\r
 112                         if(bean!=null){\r
 113                                 beanMap.put(id, bean);\r
 114                         }\r
 115                 }\r
 116                 try {\r
 117                         // prototypeなら毎回新規作成\r
 118                         if(bean.scope.equals("prototype")){\r
 119                                 Class<?> newClazz =  Class.forName(bean.className);\r
 120                                 Constructor<?> constructor = newClazz.getDeclaredConstructor(new Class[]{});\r
 121                                 //constructor.setAccessible(true);      //コンストラクタのアクセス権設定(singleton対策)\r
 122                                 return (T)constructor.newInstance((Object[])null);\r
 123                         }else{\r
 124                                 // デフォルトはsingleton\r
 125                                 if(bean.object==null){\r
 126                                         Class<?> newClazz =  Class.forName(bean.className);\r
 127                                         Constructor<?> constructor = newClazz.getDeclaredConstructor(new Class[]{});\r
 128                                         constructor.setAccessible(true);        //コンストラクタのアクセス権設定(singleton対策)\r
 129                                         bean.object = constructor.newInstance((Object[])null);\r
 130                                 }\r
 131                                 return (T)bean.object;\r
 132                         }\r
 133                 } catch (Exception e) {\r
 134                         logger.error("初期化に失敗。cayen.xmlのinstance_manager設定を見直してください。", e);\r
 135                         return null;\r
 136                 }\r
 137         }\r
 138         private static class Bean {\r
 139                 String id;\r
 140                 String className;\r
 141                 String scope="singleton";\r
 142                 Object object;\r
 143                 public Bean(){}\r
 144         }\r
 145 \r
 146 }\r