package com.atlassian.plugin.predicate;
   
   import com.atlassian.plugin.ModuleDescriptor;
   
   import org.apache.commons.collections.CollectionUtils;
   import org.apache.commons.collections.Predicate;
   
   import java.util.Arrays;
   import java.util.Collection;
  import java.util.Collections;
  
  /**
   * A {@link ModuleDescriptorPredicate} that matches modules for which their descriptor is an instance of one of the given {@link Class}.
   */
  public class ModuleDescriptorOfClassPredicate<T> implements ModuleDescriptorPredicate<T>
  {
      private final Collection<Class<? extends ModuleDescriptor<? extends T>>> moduleDescriptorClasses;
  
      public ModuleDescriptorOfClassPredicate(final Class<? extends ModuleDescriptor<? extends T>> moduleDescriptorClass)
      {
          moduleDescriptorClasses = Collections.<Class<? extends ModuleDescriptor<? extends T>>> singleton(moduleDescriptorClass);
      }
  
      /**
       * @throws IllegalArgumentException if the moduleDescriptorClasses is <code>null</code>
       */
      public ModuleDescriptorOfClassPredicate(final Class<? extends ModuleDescriptor<? extends T>>[] moduleDescriptorClasses)
      {
          if (moduleDescriptorClasses == null)
          {
              throw new IllegalArgumentException("Module descriptor classes array should not be null when constructing ModuleOfClassPredicate!");
          }
          this.moduleDescriptorClasses = Arrays.asList(moduleDescriptorClasses);
      }
  
      public boolean matches(final ModuleDescriptor<? extends T> moduleDescriptor)
      {
          return (moduleDescriptor != null) && CollectionUtils.exists(moduleDescriptorClasses, new Predicate()
          {
              public boolean evaluate(final Object object)
              {
                  return (object != null) && ((Class<?>) object).isInstance(moduleDescriptor);
              }
          });
      }
  }