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Nepxion Discovery is an enhancement for Spring Cloud Discovery

There is a newer version: 6.22.0

package com.nepxion.discovery.common.util;

/**
 * Title: Nepxion Discovery
 * Description: Nepxion Discovery
 * Copyright: Copyright (c) 2017-2050
 * Company: Nepxion
 * @author Haojun Ren
 * @version 1.0
 */

import java.util.Map;
import java.util.Properties;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.commons.lang3.StringUtils;
import org.springframework.core.env.ConfigurableEnvironment;
import org.springframework.core.env.Environment;

import com.alibaba.spring.util.PropertySourcesUtils;

// Copy from Spring Cloud Alibaba project
public class PropertiesUtil {
    public static final Pattern PATTERN = Pattern.compile("-(\\w)");

    public static void enrichProperties(Properties properties, Environment environment, String prefix, boolean replaceExistedKey, boolean ignoreEmptyValue) {
        enrichProperties(properties, environment, PATTERN, prefix, replaceExistedKey, ignoreEmptyValue);
    }

    public static void enrichProperties(Properties properties, Environment environment, Pattern pattern, String prefix, boolean replaceExistedKey, boolean ignoreEmptyValue) {
        Map map = PropertySourcesUtils.getSubProperties((ConfigurableEnvironment) environment, prefix);
        for (Map.Entry entry : map.entrySet()) {
            String key = resolveKey(pattern, entry.getKey());
            String value = String.valueOf(entry.getValue());

            addProperty(properties, key, value, replaceExistedKey, ignoreEmptyValue);
        }
    }

    public static void addProperty(Properties properties, String key, String value, boolean replaceExistedKey, boolean ignoreEmptyValue) {
        if (properties.containsKey(key)) {
            if (replaceExistedKey) {
                addProperty(properties, key, value, ignoreEmptyValue);
            }
        } else {
            addProperty(properties, key, value, ignoreEmptyValue);
        }
    }

    public static void addProperty(Properties properties, String key, String value, boolean ignoreEmptyValue) {
        if (StringUtils.isBlank(value)) {
            if (!ignoreEmptyValue) {
                properties.put(key, value);
            }
        } else {
            properties.put(key, value);
        }
    }

    public static String resolveKey(Pattern pattern, String key) {
        Matcher matcher = pattern.matcher(key);
        StringBuffer stringBuffer = new StringBuffer();
        while (matcher.find()) {
            matcher.appendReplacement(stringBuffer, matcher.group(1).toUpperCase());
        }
        matcher.appendTail(stringBuffer);

        return stringBuffer.toString();
    }
}