com.emo.ananas.configs.DataSourceConfig.java Source code

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Here is the source code for com.emo.ananas.configs.DataSourceConfig.java

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/*
 * Copyright 2013 Cdric Boufflers
 *
 * 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.emo.ananas.configs;

import java.sql.Driver;

import javax.sql.DataSource;

import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.springframework.jdbc.datasource.SimpleDriverDataSource;

import com.google.common.base.Preconditions;
import com.typesafe.config.Config;

public class DataSourceConfig {

    private final String url;

    private final String user;
    private final String password;

    private final Class<Driver> driverClass;

    @SuppressWarnings("unchecked")
    public DataSourceConfig(final Config config) {
        Preconditions.checkArgument(config.hasPath("url"),
                "expected datasources.{name}.url with valid jdbc url in config");

        this.url = config.getString("url");

        if (config.hasPath("user") || config.hasPath("password")) {
            Preconditions.checkArgument(config.hasPath("user") || config.hasPath("password"),
                    "datasources.{name}.user and datasources.{name}.password must both be specified in config");
            user = config.getString("user");
            password = config.getString("password");
        } else {
            user = null;
            password = null;
        }

        if (config.hasPath("driver")) {
            try {
                driverClass = (Class<Driver>) Class.forName(config.getString("driver"));
            } catch (ClassNotFoundException e) {
                throw new IllegalArgumentException(
                        "specify a valid driver class in datasources.{name}.driver, class not found : "
                                + config.getString("driver"),
                        e);
            }
        } else {
            driverClass = null;
        }
    }

    public DataSource build() {
        if (user != null && driverClass != null) {
            final SimpleDriverDataSource ds = new SimpleDriverDataSource();
            ds.setUrl(url);
            ds.setDriverClass(driverClass);
            ds.setUsername(user);
            ds.setPassword(password);

            return ds;
        } else if (user != null && driverClass == null) {
            return new DriverManagerDataSource(url, user, password);
        } else if (user == null & driverClass != null) {
            final SimpleDriverDataSource ds = new SimpleDriverDataSource();
            ds.setUrl(url);
            ds.setDriverClass(driverClass);

            return ds;
        } else {
            return new DriverManagerDataSource(url);
        }
    }
}