package com.atlassian.plugin.predicate;
   
   import com.atlassian.plugin.ModuleDescriptor;
   
   import java.util.function.Predicate;
   
   import static com.atlassian.plugin.util.Assertions.notNull;
   
   /**
   * A {@link Predicate} that matches modules that are is an instance of the given {@link Class}.
   */
  public class ModuleOfClassPredicate<T> implements Predicate<ModuleDescriptor<T>> {
      private final Class<T> moduleClass;
  
      /**
       * @throws IllegalArgumentException if the moduleClass is <code>null</code>
       */
      public ModuleOfClassPredicate(final Class<T> moduleClass) {
          this.moduleClass = notNull("moduleClass", moduleClass);
      }
  
      public boolean test(final ModuleDescriptor<T> moduleDescriptor) {
          if (moduleDescriptor != null) {
              final Class<? extends T> moduleClassInDescriptor = moduleDescriptor.getModuleClass();
              return (moduleClassInDescriptor != null) && moduleClass.isAssignableFrom(moduleClassInDescriptor);
          }
  
          return false;
      }
  }