org.hx.rainbow.common.util.PropertiesUtil.java Source code

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Here is the source code for org.hx.rainbow.common.util.PropertiesUtil.java

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/*
 * Copyright (c) 2013, OpenCloudDB/MyCAT and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software;Designed and Developed mainly by many Chinese 
 * opensource volunteers. you can redistribute it and/or modify it under the 
 * terms of the GNU General Public License version 2 only, as published by the
 * Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 * 
 * Any questions about this component can be directed to it's project Web address 
 * https://code.google.com/p/opencloudb/.
 *
 */
package org.hx.rainbow.common.util;

import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import java.util.ResourceBundle;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * ?.properties?Map
 * @author huangxin
 *
 */
public class PropertiesUtil {

    protected final static Log logger = LogFactory.getLog(PropertiesUtil.class);

    public static Map<String, Object> map = new HashMap<String, Object>();

    private static PropertiesUtil propertiesUtil = null;

    private PropertiesUtil() {

    }

    public static PropertiesUtil getInstance() {
        if (propertiesUtil == null) {
            synchronized (PropertiesUtil.class) {
                if (propertiesUtil == null) {
                    propertiesUtil = new PropertiesUtil();
                }
            }
        }
        return propertiesUtil;
    }

    /**
     * ?.properties?Map
     * @param propertiesFile
     * @return
     */
    public Map<String, Object> read(String propertiesFile) {

        @SuppressWarnings("unchecked")
        Map<String, Object> maps = (Map<String, Object>) map.get(propertiesFile);
        if (maps == null) {
            maps = new HashMap<String, Object>();
            ResourceBundle rb = ResourceBundle.getBundle(propertiesFile);
            Enumeration<String> enu = rb.getKeys();
            while (enu.hasMoreElements()) {
                String obj = enu.nextElement();
                Object objv = rb.getObject(obj);
                maps.put(obj, objv);
            }
            map.put(propertiesFile, maps);
        }
        return maps;
    }

}