package com.atlassian.plugin.predicate;
   
   import com.atlassian.plugin.ModuleDescriptor;
   
   /**
    * A {@link ModuleDescriptorPredicate} that matches modules that are is an instance of the given {@link Class}.
    */
   public class ModuleOfClassPredicate<T> implements ModuleDescriptorPredicate<T>
   {
      private final Class<T> moduleClass;
  
      /**
       * @throws IllegalArgumentException if the moduleClass is <code>null</code>
       */
      public ModuleOfClassPredicate(final Class<T> moduleClass)
      {
          if (moduleClass == null)
          {
              throw new IllegalArgumentException("Module class should not be null when constructing ModuleOfClassPredicate!");
          }
          this.moduleClass = moduleClass;
      }
  
      public boolean matches(final ModuleDescriptor<? extends T> moduleDescriptor)
      {
          if (moduleDescriptor != null)
          {
              final Class<? extends T> moduleClassInDescriptor = moduleDescriptor.getModuleClass();
              return (moduleClassInDescriptor != null) && moduleClass.isAssignableFrom(moduleClassInDescriptor);
          }
  
          return false;
      }
  }