001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.apache.shiro.util;
020
021import org.apache.shiro.authz.Permission;
022import org.apache.shiro.authz.permission.PermissionResolver;
023
024import java.util.Arrays;
025import java.util.Collection;
026import java.util.LinkedHashSet;
027import java.util.Set;
028
029
030/**
031 * Utility class to help with String-to-Permission object resolution.
032 *
033 * @since 0.1
034 */
035public class PermissionUtils {
036
037    public static Set<Permission> resolveDelimitedPermissions(String s, PermissionResolver permissionResolver) {
038        Set<String> permStrings = toPermissionStrings(s);
039        return resolvePermissions(permStrings, permissionResolver);
040    }
041
042    public static Set<String> toPermissionStrings(String permissionsString) {
043        String[] tokens = StringUtils.split(permissionsString);
044        if (tokens != null && tokens.length > 0) {
045            return new LinkedHashSet<String>(Arrays.asList(tokens));
046        }
047        return null;
048    }
049
050    public static Set<Permission> resolvePermissions(Collection<String> permissionStrings, PermissionResolver permissionResolver) {
051        Set<Permission> permissions = new LinkedHashSet<Permission>(permissionStrings.size());
052        for (String permissionString : permissionStrings) {
053            permissions.add(permissionResolver.resolvePermission(permissionString));
054        }
055        return permissions;
056    }
057}