de.arago.data.util.ConfigHelper.java Source code

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Here is the source code for de.arago.data.util.ConfigHelper.java

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/**
 * Copyright (c) 2010 arago AG, http://www.arago.de/
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package de.arago.data.util;

import java.util.Properties;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

final class ConfigHelper {
    private static final String PREFIX = "de.arago.data.util.datasource.";
    private static final Pattern userPattern = Pattern.compile("user=([^&]+)");
    private static final Pattern passPattern = Pattern.compile("password=([^&]+)");

    static SessionFactory makeFactory(String datasource, Properties p) {
        final Configuration configuration = new Configuration();
        configuration.configure();

        String jdbcUrl = System.getProperty(PREFIX + datasource);

        if (jdbcUrl == null || jdbcUrl.isEmpty()) {
            jdbcUrl = "jdbc:mysql://127.0.0.1/rike?user=rike&password=rike&useUnicode=true&characterEncoding=UTF-8";
        }

        configuration.setProperty("hibernate.connection.url", jdbcUrl);
        setCredentials(configuration, jdbcUrl);

        setDebug(configuration);
        setAdditionalProperties(configuration, p);

        return configuration.buildSessionFactory();
    }

    private static void setCredentials(Configuration configuration, String jdbcUrl) {
        Matcher user = userPattern.matcher(jdbcUrl);
        if (user.find())
            configuration.setProperty("hibernate.connection.username", user.group(1));

        Matcher pass = passPattern.matcher(jdbcUrl);
        if (pass.find())
            configuration.setProperty("hibernate.connection.password", pass.group(1));
    }

    private static void setAdditionalProperties(Configuration configuration, Properties additional) {
        if (additional == null)
            return;

        for (String key : additional.stringPropertyNames()) {
            configuration.setProperty(key, additional.getProperty(key));
        }
    }

    private static void setDebug(Configuration configuration) {
        configuration.setProperty("hibernate.show_sql", System.getProperty("hibernate.show_sql", "false"));
    }

}