/**
 * Copyright © 2015 - 2017 EntDIY JavaEE Development Framework
 *
 * Site: https://www.entdiy.com, E-Mail: xautlx@hotmail.com
 *
 * Licensed 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 com.entdiy.security;

import java.io.IOException;

import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import org.apache.shiro.subject.Subject;
import org.apache.shiro.web.filter.authz.AuthorizationFilter;

/**
 * Shiro filterChainDefinitions中 roles默认是and，定制一个过滤器支持any语法
 * 示例：/admin/** = anyRoles[ROLE_MGMT_USER]
 */
public class AnyRolesAuthorizationFilter extends AuthorizationFilter {

    @Override
    public boolean isAccessAllowed(ServletRequest request, ServletResponse response, Object mappedValue)
            throws IOException {

        Subject subject = getSubject(request, response);
        String[] rolesArray = (String[]) mappedValue;

        if (rolesArray == null || rolesArray.length == 0) {
            //no roles specified, so nothing to check - allow access.
            return true;
        }

        for (int i = 0; i < rolesArray.length; i++) {
            if (subject.hasRole(rolesArray[i])) {
                return true;
            }
        }
        return false;
    }

}