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SDK to use Payzen SOAP Web Services

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/*
 * Copyright 2015-2018 Javier Garcia Alonso.
 *
 * 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 eu.payzen.webservices.sdk.util;

import java.io.IOException;
import java.util.Properties;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Util class that reads the content of the config file and convert it into 
 * Properties.
 * 
 * @author javier
 */
public final class Config {
    private static final Logger logger = LoggerFactory.getLogger(Config.class);
   private static final String CONFIG_FILENAME = "payzen-config.properties";
   
   private static Properties config;   

    public static Properties getConfig() {
        if (config == null) {
            config = new Properties();
            try {
                //load a properties file from class path, inside static method
                config.load(Config.class.getClassLoader().getResourceAsStream(CONFIG_FILENAME));
            } catch (IOException ex) {
                logger.error("Cannot read config values from file:" + CONFIG_FILENAME, ex);
            }
        }
        
        return config;
    }
}