opendaylight/config/config-manager/src/test/java/org/opendaylight/controller/config/manager/impl/ClassBasedModuleFactory.java

   1 /*
   2  * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.controller.config.manager.impl;
   9
  10 import java.lang.reflect.Constructor;
  11 import java.util.Arrays;
  12 import java.util.List;
  13
  14 import org.opendaylight.controller.config.api.DependencyResolver;
  15 import org.opendaylight.controller.config.api.DynamicMBeanWithInstance;
  16 import org.opendaylight.controller.config.api.annotations.AbstractServiceInterface;
  17 import org.opendaylight.controller.config.spi.Module;
  18 import org.opendaylight.controller.config.spi.ModuleFactory;
  19
  20 import com.google.common.base.Preconditions;
  21 import com.google.common.base.Throwables;
  22
  23 /**
  24  * Creates new Config beans by calling {@link Class#newInstance()} on provided
  25  * config bean class.
  26  *
  27  */
  28 public class ClassBasedModuleFactory implements ModuleFactory {
  29     private final String implementationName;
  30     private final Class<? extends Module> configBeanClass;
  31
  32     /**
  33      * @param implementationName
  34      * @param configBeanClass
  35      *            class that will be instantiated when createModule is called.
  36      *            This class must implement Module interface and all exported
  37      *            interfaces.
  38      */
  39     public ClassBasedModuleFactory(String implementationName,
  40             Class<? extends Module> configBeanClass) {
  41         this.implementationName = implementationName;
  42         this.configBeanClass = configBeanClass;
  43     }
  44
  45     @Override
  46     public String getImplementationName() {
  47         return implementationName;
  48     }
  49
  50     @Override
  51     public Module createModule(String instanceName,
  52             DependencyResolver dependencyResolver, DynamicMBeanWithInstance old)
  53             throws Exception {
  54         Preconditions.checkNotNull(dependencyResolver);
  55         Preconditions.checkNotNull(old);
  56         Constructor<? extends Module> declaredConstructor;
  57         try {
  58             declaredConstructor = configBeanClass
  59                     .getDeclaredConstructor(DynamicMBeanWithInstance.class);
  60         } catch (NoSuchMethodException e) {
  61             throw new IllegalStateException(
  62                     "Did not find constructor with parameters (DynamicMBeanWithInstance) in "
  63                             + configBeanClass, e);
  64         }
  65         Preconditions.checkState(declaredConstructor != null);
  66         return declaredConstructor.newInstance(old);
  67     }
  68
  69     @Override
  70     public Module createModule(String instanceName,
  71             DependencyResolver dependencyResolver) {
  72         try {
  73             return configBeanClass.newInstance();
  74         } catch (Exception e) {
  75             throw Throwables.propagate(e);
  76         }
  77     }
  78
  79     @Override
  80     public boolean isModuleImplementingServiceInterface(
  81             Class<? extends AbstractServiceInterface> serviceInterface) {
  82         Class<?>[] classes = configBeanClass.getInterfaces();
  83         List<Class<?>> ifc = Arrays.asList(classes);
  84         if (ifc.contains(serviceInterface)) {
  85             return true;
  86         }
  87         for (Class<?> c : classes) {
  88             ifc = Arrays.asList(c.getInterfaces());
  89             if (ifc.contains(serviceInterface)) {
  90                 return true;
  91             }
  92         }
  93         return false;
  94     }
  95 }