org.opencastproject.adminui.userdirectory.UIRolesRoleProvider.java Source code

Introduction

Here is the source code for org.opencastproject.adminui.userdirectory.UIRolesRoleProvider.java

Source

/**
 * Licensed to The Apereo Foundation under one or more contributor license
 * agreements. See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.
 *
 *
 * The Apereo Foundation licenses this file to you under the Educational
 * Community 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://opensource.org/licenses/ecl2.txt
 *
 * 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.opencastproject.adminui.userdirectory;

import org.opencastproject.security.api.JaxbOrganization;
import org.opencastproject.security.api.JaxbRole;
import org.opencastproject.security.api.Organization;
import org.opencastproject.security.api.Role;
import org.opencastproject.security.api.RoleProvider;
import org.opencastproject.security.api.SecurityService;
import org.opencastproject.security.api.UserProvider;

import com.entwinemedia.fn.Fn2;
import com.entwinemedia.fn.Stream;
import com.entwinemedia.fn.StreamOp;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.exception.ExceptionUtils;
import org.osgi.service.component.ComponentContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.io.InputStream;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import java.util.TreeSet;
import java.util.regex.Pattern;

/**
 * The admin UI roles role provider.
 */
public class UIRolesRoleProvider implements RoleProvider {

    /** The logger */
    private static final Logger logger = LoggerFactory.getLogger(UIRolesRoleProvider.class);

    /** The security service */
    protected SecurityService securityService = null;

    private Set<String> roles;

    /**
     * @param securityService
     *          the securityService to set
     */
    public void setSecurityService(SecurityService securityService) {
        this.securityService = securityService;
    }

    protected void activate(ComponentContext cc) {
        InputStream in = null;
        try {
            in = getClass().getResourceAsStream("/roles.txt");
            roles = new TreeSet<String>(IOUtils.readLines(in, "UTF-8"));
        } catch (IOException e) {
            logger.error("Unable to read available roles: {}", ExceptionUtils.getStackTrace(e));
        } finally {
            IOUtils.closeQuietly(in);
        }
        logger.info("Activated Admin UI roles role provider");
    }

    /**
     * @see org.opencastproject.security.api.RoleProvider#getRoles()
     */
    @Override
    public Iterator<Role> getRoles() {
        Organization organization = securityService.getOrganization();
        return Stream.$(roles).map(toRole._2(organization)).iterator();
    }

    /**
     * @see org.opencastproject.security.api.RoleProvider#getRolesForUser(String)
     */
    @Override
    public List<Role> getRolesForUser(String userName) {
        return Collections.emptyList();
    }

    /**
     * @see org.opencastproject.security.api.RoleProvider#getOrganization()
     */
    @Override
    public String getOrganization() {
        return UserProvider.ALL_ORGANIZATIONS;
    }

    /**
     * @see org.opencastproject.security.api.RoleProvider#findRoles(String, int, int)
     */
    @Override
    public Iterator<Role> findRoles(String query, int offset, int limit) {
        if (query == null)
            throw new IllegalArgumentException("Query must be set");

        Organization organization = securityService.getOrganization();
        return Stream.$(roles).filter(filterByName._2(query)).drop(offset)
                .apply(limit > 0 ? StreamOp.<String>id().take(limit) : StreamOp.<String>id())
                .map(toRole._2(organization)).iterator();
    }

    private static boolean like(String string, final String query) {
        String regex = query.replace("_", ".").replace("%", ".*?");
        Pattern p = Pattern.compile(regex, Pattern.CASE_INSENSITIVE | Pattern.DOTALL);
        return p.matcher(string).matches();
    }

    private static final Fn2<String, Organization, Role> toRole = new Fn2<String, Organization, Role>() {
        @Override
        public Role ap(String role, Organization organization) {
            return new JaxbRole(role, JaxbOrganization.fromOrganization(organization));
        }
    };

    private static final Fn2<String, String, Boolean> filterByName = new Fn2<String, String, Boolean>() {
        @Override
        public Boolean ap(String role, String query) {
            return like(role, query);
        }
    };
}