package org.codehaus.plexus.component;
   
   import java.util.Collection;
   import java.util.Iterator;
   import java.util.List;
   import java.util.Map;
   import java.util.Set;
   
   import org.apache.xbean.recipe.RecipeHelper;
  
  @SuppressWarnings({"unchecked", "UnusedDeclaration"})
  public final class CastUtils {
      private CastUtils() {
          // utility class, never constructed
      }
  
      public static <T, U> Map<T, U> cast(Map<?, ?> p) {
          return (Map<T, U>) p;
      }
  
      public static <T, U> Map<T, U> cast(Map<?, ?> p, Class<T> t, Class<U> u) {
          return (Map<T, U>) p;
      }
  
      public static <T> Collection<T> cast(Collection<?> p) {
          return (Collection<T>) p;
      }
  
      public static <T> Collection<T> cast(Collection<?> p, Class<T> cls) {
          return (Collection<T>) p;
      }
  
      public static <T> List<T> cast(List<?> p) {
          return (List<T>) p;
      }
  
      public static <T> List<T> cast(List<?> p, Class<T> cls) {
          return (List<T>) p;
      }
  
      public static <T> Iterator<T> cast(Iterator<?> p) {
          return (Iterator<T>) p;
      }
  
      public static <T> Iterator<T> cast(Iterator<?> p, Class<T> cls) {
          return (Iterator<T>) p;
      }
  
      public static <T> Set<T> cast(Set<?> p) {
          return (Set<T>) p;
      }
  
      public static <T> Set<T> cast(Set<?> p, Class<T> cls) {
          return (Set<T>) p;
      }
  
      public static <T, U> Map.Entry<T, U> cast(Map.Entry<?, ?> p) {
          return (Map.Entry<T, U>) p;
      }
  
      public static <T, U> Map.Entry<T, U> cast(Map.Entry<?, ?> p, Class<T> pc, Class<U> uc) {
          return (Map.Entry<T, U>) p;
      }
  
      // todo remove when recipe helper accecpts nulls
      public static boolean isAssignableFrom(Class<?> expected, Class<?> actual) {
          return actual != null && RecipeHelper.isAssignableFrom(expected, actual);
      }
  }