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/**
 * Copyright 2012 Kjetil Ørbekk <kjetil.orbekk@gmail.com>
 *
 * 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.orbekk.same.config;

import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.Properties;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class Configuration {
    public final static String configurationProperty =
            "com.orbekk.same.config.file";

    static final Logger logger = LoggerFactory.getLogger(Configuration.class);
    Properties configuration = new Properties();

    public Configuration(Properties properties) {
        this.configuration = properties;
    }

    Configuration() {
        // Use factory methods.
    }

    public static Configuration loadOrDie() {
        Configuration configuration = new Configuration();
        boolean status = configuration.loadDefault();
        if (!status) {
            logger.error("Could not load configurotion.");
            System.exit(1);
        }
        return configuration;
    }

    public static Configuration load() {
        Configuration configuration = new Configuration();
        configuration.loadDefault();
        return configuration;
    }

    public boolean loadDefault() {
        String filename = System.getProperty(configurationProperty);
        if (filename != null) {
            try {
                configuration.load(new FileReader(filename));
                return true;
            } catch (FileNotFoundException e) {
                logger.error("Failed to load configuration. {}", e);
                logger.error("Failed to load configuration. {}={}",
                        configurationProperty, filename);
            } catch (IOException e) {
                logger.error("Failed to load configuration. {}", e);
                logger.error("Failed to load configuration. {}={}",
                        configurationProperty, filename);
            }
        } else {
            logger.error("Failed to load configuration. {}={}",
                    configurationProperty, filename);
        }
        return false;
    }

    public String get(String name) {
        String value = configuration.getProperty(name);
        if (value == null) {
            logger.error("Property {} = null", name);
        }
        return value;
    }

    public Integer getInt(String name) {
        if (get(name) == null) {
            return null;
        }
        return Integer.valueOf(get(name));
    }
}