/*

  * 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.shiro.util;

 import org.apache.shiro.authz.Permission;

 import org.apache.shiro.authz.permission.PermissionResolver;

 import java.util.Arrays;

 import java.util.Collection;

 import java.util.LinkedHashSet;

 import java.util.Set;

 /**

  * Utility class to help with String-to-Permission object resolution.

  *

  * @since 0.1

  */

 public class PermissionUtils {

     public static Set<Permission> resolveDelimitedPermissions(String s, PermissionResolver permissionResolver) {

         Set<String> permStrings = toPermissionStrings(s);

         return resolvePermissions(permStrings, permissionResolver);

     }

     public static Set<String> toPermissionStrings(String permissionsString) {

         String[] tokens = StringUtils.split(permissionsString);

         if (tokens != null && tokens.length > 0) {

             return new LinkedHashSet<String>(Arrays.asList(tokens));

         }

         return null;

     }

     public static Set<Permission> resolvePermissions(Collection<String> permissionStrings, PermissionResolver permissionResolver) {

         Set<Permission> permissions = new LinkedHashSet<Permission>(permissionStrings.size());

         for (String permissionString : permissionStrings) {

             permissions.add(permissionResolver.resolvePermission(permissionString));

         }

         return permissions;

     }

 }