ApplicationConstants.java

/*
 * Copyright 2010 Nabeel Mukhtar 
 * 
 * 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.github.api.v2.services.constant;

import java.io.IOException;
import java.util.Properties;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.regex.Pattern;

/**
 * The Class ApplicationConstants.
 */
public final class ApplicationConstants {

    /** The Constant APP_CONSTANTS_FILE. */
    public static final String APP_CONSTANTS_FILE = "ApplicationConstants.properties";

    /** The Constant LOG. */
    private static final Logger LOG = Logger.getLogger(ApplicationConstants.class.getCanonicalName());
    
    /** The Constant applicationConstants. */
    private static final Properties applicationConstants = new Properties();

    static {
        try {
            applicationConstants.load(
                ApplicationConstants.class.getResourceAsStream(APP_CONSTANTS_FILE));
        } catch (IOException e) {
            LOG.log(Level.SEVERE, "An error occurred while loading properties.", e);
        }
    }

    /** The Constant CONTENT_ENCODING. */
    public static final String CONTENT_ENCODING = getProperty("com.github.api.v2.services.encoding");

    /** The Constant DEFAULT_API_VERSION. */
    public static final String DEFAULT_API_VERSION = getProperty("com.github.api.v2.services.defaultApiVersion");
    
    /** The Constant DEFAULT_FORMAT. */
    public static final String DEFAULT_FORMAT = getProperty("com.github.api.v2.services.defaultFormat");
    
    /** The Constant DATE_FORMAT. */
    public static final String DATE_FORMAT = getProperty("com.github.api.v2.services.dateFormat");
    
    /** The Constant CONNECT_TIMEOUT. */
    public static final int CONNECT_TIMEOUT = getIntProperty("com.github.api.v2.services.connectTimeout");
    
    /** The Constant READ_TIMEOUT. */
    public static final int READ_TIMEOUT = getIntProperty("com.github.api.v2.services.readTimeout");
    
    /** The Constant ACCESS_TOKEN_PATTERN. */
    public static final Pattern ACCESS_TOKEN_PATTERN = getPatternProperty("com.github.api.v2.services.accessTokenPattern");
    
    /** The Constant ACCESS_DENIED_PATTERN. */
    public static final Pattern ACCESS_DENIED_PATTERN = getPatternProperty("com.github.api.v2.services.accessDeniedPattern");
    
    /**
	 * Instantiates a new application constants.
	 */
    private ApplicationConstants() {}

    /**
	 * Gets the property.
	 * 
	 * @param key
	 *            the key
	 * 
	 * @return the property
	 */
    public static String getProperty(String key) {
        return applicationConstants.getProperty(key);
    }

    /**
	 * Gets the int property.
	 * 
	 * @param key
	 *            the key
	 * 
	 * @return the int property
	 */
    public static int getIntProperty(String key) {
        String property = applicationConstants.getProperty(key);

        if (isNullOrEmpty(property)) {
            return 0;
        } else {
            return Integer.parseInt(property);
        }
    }

    /**
	 * Gets the boolean property.
	 * 
	 * @param key
	 *            the key
	 * 
	 * @return the boolean property
	 */
    public static boolean getBooleanProperty(String key) {
        String property = applicationConstants.getProperty(key);

        if (isNullOrEmpty(property)) {
            return false;
        } else {
            return Boolean.parseBoolean(property);
        }
    }

    /**
	 * Gets the double property.
	 * 
	 * @param key
	 *            the key
	 * 
	 * @return the double property
	 */
    public static double getDoubleProperty(String key) {
        String property = applicationConstants.getProperty(key);

        if (isNullOrEmpty(property)) {
            return 0;
        } else {
            return Double.parseDouble(property);
        }
    }

    /**
	 * Gets the long property.
	 * 
	 * @param key
	 *            the key
	 * 
	 * @return the long property
	 */
    public static long getLongProperty(String key) {
        String property = applicationConstants.getProperty(key);

        if (isNullOrEmpty(property)) {
            return 0;
        } else {
            return Long.parseLong(property);
        }
    }
    
    /**
	 * Gets the pattern property.
	 * 
	 * @param key
	 *            the key
	 * 
	 * @return the pattern property
	 */
    public static Pattern getPatternProperty(String key) {
        String property = applicationConstants.getProperty(key);

        if (isNullOrEmpty(property)) {
            return null;
        } else {
            return Pattern.compile(property);
        }
    }

    /**
	 * Checks if is null or empty.
	 * 
	 * @param s
	 *            the s
	 * 
	 * @return true, if is null or empty
	 */
    private static boolean isNullOrEmpty(String s) {
        return ((s == null) || s.length() == 0);
    }
}