it.scoppelletti.programmerpower.security.DefaultRoleManager.java Source code

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Here is the source code for it.scoppelletti.programmerpower.security.DefaultRoleManager.java

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/*
 * Copyright (C) 2012 Dario Scoppelletti, <http://www.scoppelletti.it/>.
 * 
 * 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 it.scoppelletti.programmerpower.security;

import java.io.*;
import java.net.*;
import java.util.*;
import org.slf4j.*;
import org.springframework.beans.factory.*;
import it.scoppelletti.programmerpower.*;
import it.scoppelletti.programmerpower.io.*;
import it.scoppelletti.programmerpower.reflect.*;
import it.scoppelletti.programmerpower.types.*;

/**
 * Implementazione di default dell&rsquo;interfaccia {@code RoleManager}.
 * 
 * <P>Questa implementazione dell&rsquo;interfaccia {@code RoleManager} 
 * acquisce i ruoli e le relative descrizioni dal file di propriet&agrave;
 * {@code roles.properties} e dalle sue localizzazioni inseriti nel
 * sotto-direttorio
 * {@code it.scoppelletti.programmerpower.security.DefaultRoleManager} del
 * direttorio dei dati condivisi tra tutte le applicazioni
 * {@code SharedDataDirectory}.</P>
 * 
 * @see   it.scoppelletti.programmerpower.io.SharedDataDirectory
 * @since 1.0.0
 */
@Final
public class DefaultRoleManager implements RoleManager, InitializingBean {

    /**
     * Base del nome del contenitore di risorse per la localizzazione dei ruoli.
     * Il valore della costante &egrave; <CODE>{@value}</CODE>.
     */
    public static final String BASENAME = "roles";

    private static final Logger myLogger = LoggerFactory.getLogger(DefaultRoleManager.class);

    private ClassLoader myLoader;

    /**
     * Costruttore.
     */
    public DefaultRoleManager() {
    }

    /**
     * Inizializzazione.
     */
    public void afterPropertiesSet() throws Exception {
        File dir;
        URL[] urls = new URL[1];

        dir = SharedDataDirectory.getInstance().initResourceDirectory(DefaultRoleManager.class);
        urls[0] = dir.toURI().toURL();
        myLoader = new URLClassLoader(urls);
    }

    public Map<String, String> loadRoles(Locale locale) {
        String desc, role;
        ResourceBundle res;
        Map<String, String> map;
        Enumeration<String> keys;

        if (locale == null) {
            throw new ArgumentNullException("locale");
        }

        map = new TreeMap<String, String>();
        try {
            res = ResourceBundle.getBundle(DefaultRoleManager.BASENAME, locale, myLoader);
        } catch (MissingResourceException ex) {
            myLogger.warn(String.format("Resource bundle %1$s not found.", DefaultRoleManager.BASENAME), ex);
            return map;
        }

        keys = res.getKeys();
        while (keys.hasMoreElements()) {
            role = keys.nextElement();

            try {
                desc = res.getString(role);
            } catch (MissingResourceException ex) {
                desc = null;
            }

            if (Strings.isNullOrEmpty(desc)) {
                desc = role;
            }

            map.put(role, desc);
        }

        return map;
    }
}