eu.etaxonomy.taxeditor.cdmlib/src/main/java/eu/etaxonomy/cdm/api/application/CdmApplicationState.java

   1 // $Id$
   2 /**
   3 * Copyright (C) 2015 EDIT
   4 * European Distributed Institute of Taxonomy
   5 * http://www.e-taxonomy.eu
   6 *
   7 * The contents of this file are subject to the Mozilla Public License Version 1.1
   8 * See LICENSE.TXT at the top of this package for the full license terms.
   9 */
  10 package eu.etaxonomy.cdm.api.application;
  11
  12 import java.lang.reflect.InvocationTargetException;
  13 import java.lang.reflect.Method;
  14 import java.lang.reflect.Type;
  15
  16 import eu.etaxonomy.cdm.api.service.ICommonService;
  17 import eu.etaxonomy.cdm.api.service.IService;
  18 import eu.etaxonomy.cdm.api.service.ITestService;
  19
  20 /**
  21  * @author cmathew
  22  * @date 17 Jun 2015
  23  *
  24  */
  25 public class CdmApplicationState {
  26
  27     private static CdmApplicationState cdmApplicationState;
  28
  29     private ICdmApplicationConfiguration appConfig;
  30
  31     private ICdmDataChangeService dataChangeService;
  32
  33     public static CdmApplicationState getInstance() {
  34         if(cdmApplicationState == null) {
  35             cdmApplicationState = new CdmApplicationState();
  36         }
  37         return cdmApplicationState;
  38     }
  39
  40     public void setAppConfig(ICdmApplicationConfiguration appConfig) {
  41         this.appConfig = appConfig;
  42     }
  43
  44     public ICdmApplicationConfiguration getAppConfig() {
  45         return appConfig;
  46     }
  47
  48     public static void setCurrentAppConfig(ICdmApplicationConfiguration appConfig) {
  49         getInstance().setAppConfig(appConfig);
  50     }
  51
  52     public static ICdmApplicationConfiguration getCurrentAppConfig() {
  53         return getInstance().getAppConfig();
  54     }
  55
  56     /**
  57      * @return the dataChangeService
  58      */
  59     public ICdmDataChangeService getDataChangeService() {
  60         return dataChangeService;
  61     }
  62
  63     /**
  64      * @param dataChangeService the dataChangeService to set
  65      */
  66     public void setDataChangeService(ICdmDataChangeService dataChangeService) {
  67         this.dataChangeService = dataChangeService;
  68     }
  69
  70     public static ICdmDataChangeService getCurrentDataChangeService() {
  71         return getInstance().getDataChangeService();
  72     }
  73
  74     public static void setCurrentDataChangeService(ICdmDataChangeService dataChangeService) {
  75         getInstance().setDataChangeService(dataChangeService);
  76     }
  77
  78     public static void dispose() {
  79         getInstance().setCurrentDataChangeService(null);
  80         getInstance().setAppConfig(null);
  81     }
  82
  83     /**
  84      * Generic method that will scan the getters of {@link ICdmApplicationConfiguration} for the given service
  85      * interface. If a matching getter is found the according service implementation is returned by
  86      * invoking the getter otherwise the method returns <code>null</code>.
  87      *
  88      * @param <T>
  89      * @param serviceClass
  90      * @return the configured implementation of <code>serviceClass</code> or <code>null</code>
  91      * @throws CdmApplicationException
  92      */
  93     public static <T extends IService> T getService(Class<T> serviceClass) throws CdmApplicationException {
  94         ICdmApplicationConfiguration configuration = getCurrentAppConfig();
  95
  96         Method[] methods = ICdmApplicationConfiguration.class.getDeclaredMethods();
  97
  98         T service = null;
  99
 100         for (Method method : methods) {
 101             Type type = method.getGenericReturnType();
 102
 103             if (type.equals(serviceClass)) {
 104                 try {
 105                     service = (T) method.invoke(configuration, null);
 106                     break;
 107                 } catch (IllegalArgumentException iae) {
 108                     throw new CdmApplicationException(iae);
 109                 } catch (IllegalAccessException iae) {
 110                     throw new CdmApplicationException(iae);
 111                 } catch (InvocationTargetException ite) {
 112                     throw new CdmApplicationException(ite);
 113                 }
 114             }
 115         }
 116
 117         return service;
 118     }
 119
 120     /**
 121      * @see #getService(Class)
 122      * As ICommonService is not extending IService we need a specific request here
 123      */
 124     public static ICommonService getCommonService() {
 125         ICdmApplicationConfiguration configuration = getCurrentAppConfig();
 126
 127         return configuration.getCommonService();
 128
 129     }
 130
 131     public static ITestService getTestService() {
 132         ICdmApplicationConfiguration configuration = getCurrentAppConfig();
 133
 134         return ((CdmApplicationRemoteController)configuration).getTestService();
 135
 136     }
 137
 138 }