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;
023import org.apache.shiro.lang.util.StringUtils;
024
025import java.util.Arrays;
026import java.util.Collection;
027import java.util.LinkedHashSet;
028import java.util.Set;
029
030
031/**
032 * Utility class to help with String-to-Permission object resolution.
033 *
034 * @since 0.1
035 */
036public final class PermissionUtils {
037
038    private PermissionUtils() {
039    }
040
041    public static Set<Permission> resolveDelimitedPermissions(String s, PermissionResolver permissionResolver) {
042        Set<String> permStrings = toPermissionStrings(s);
043        return resolvePermissions(permStrings, permissionResolver);
044    }
045
046    public static Set<String> toPermissionStrings(String permissionsString) {
047        String[] tokens = StringUtils.split(permissionsString);
048        if (tokens != null && tokens.length > 0) {
049            return new LinkedHashSet<String>(Arrays.asList(tokens));
050        }
051        return null;
052    }
053
054    public static Set<Permission> resolvePermissions(Collection<String> permissionStrings,
055                                                     PermissionResolver permissionResolver) {
056        Set<Permission> permissions = new LinkedHashSet<>(permissionStrings.size());
057        for (String permissionString : permissionStrings) {
058            permissions.add(permissionResolver.resolvePermission(permissionString));
059        }
060        return permissions;
061    }
062}