/*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements. See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership. The ASF licenses this file

  * to you under the Apache License, Version 2.0 (the

  * "License"); you may not use this file except in compliance

  * with the License. You may obtain a copy of the License at

  *

  *     http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing,

  * software distributed under the License is distributed on an

  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

  * KIND, either express or implied. See the License for the

  * specific language governing permissions and limitations under the License.

  */

 package org.apache.shindig.social.opensocial.model;

 import com.google.common.collect.Sets;

 import java.util.Collections;

 import java.util.Set;

 /**

  * Utility class for OpenSocial enums.

  */

 public final class EnumUtil {

   /**

    * This is a utility class and can't be constructed.

    */

   private EnumUtil() {

   }

   /**

    *

    * @param vals array of enums

    * @return a set of the names for a list of Enum values defined by toString

    */

   // TODO: Because we have a Enum interface in this package we have to explicitly state the java.lang.Enum (bad ?)

   public static Set<String> getEnumStrings(java.lang.Enum<?>... vals) {

     Set<String> result = Sets.newHashSet();

     for (java.lang.Enum<?> v : vals) {

       result.add(v.toString());

     }

     if (result.size() != vals.length) {

       throw new IllegalArgumentException("Enum names are not disjoint set");

     }

     return Collections.unmodifiableSet(result);

   }

 }