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package com.alibaba.otter.canal.common.utils;


import org.apache.commons.lang.StringUtils;

import java.util.Properties;

public class PropertiesUtils {
    public static String getProperty(Properties properties, String key, String defaultValue) {
        String value = getProperty(properties, key);
        if (StringUtils.isEmpty(value)) {
            return defaultValue;
        } else {
            return value;
        }
    }

    public static String getProperty(Properties properties, String key) {
        key = StringUtils.trim(key);
        String value = System.getProperty(key);

        if (value == null) {
            value = System.getenv(key);
        }

        if (value == null) {
            value = properties.getProperty(key);
        }

        return StringUtils.trim(value);
    }
}