content: /*
   * Copyright 2013-2023 the original author or authors.
   *
   * 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
   *
   *      https://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.alibaba.cloud.nacos;
  
  import java.util.ServiceLoader;
  
  import com.alibaba.cloud.nacos.utils.StringUtils;
  
  import org.springframework.boot.context.properties.bind.BindResult;
  import org.springframework.boot.context.properties.bind.Binder;
  import org.springframework.core.env.Environment;
  
  /**
   * @author shiyiyue
   */
  public final class NacosPropertiesPrefixer {
  
  	/**
  	 * prefix from spi provider.
  	 */
  	public static final String PREFIX = getPrefixFromSpi();
  
  	private NacosPropertiesPrefixer() {
  	}
  
  	private static String getPrefixFromSpi() {
  		ServiceLoader<NacosPropertiesPrefixProvider> load = ServiceLoader.load(NacosPropertiesPrefixProvider.class);
  		for (NacosPropertiesPrefixProvider provider : load) {
  			return provider.getPrefix();
  		}
  		return "";
  	}
  
  	public static String getPrefix(Environment environment) {
  		String prefix = "spring.nacos";
  		String prefixFromProperties = environment.getProperty("spring.nacos.properties.prefix");
  		if (StringUtils.isBlank(prefixFromProperties)) {
  			if (StringUtils.isNotBlank(NacosPropertiesPrefixer.PREFIX)) {
  				prefix = NacosPropertiesPrefixer.PREFIX;
  			}
  		}
  		else {
  			prefix = prefixFromProperties;
  		}
  
  		if (StringUtils.isNotBlank(prefix) && prefix.endsWith(".")) {
  			prefix = prefix.substring(0, prefix.length() - 1);
  		}
  		return prefix;
  	}
  
  	public static String getPrefix(Binder binder) {
  		String prefix = "spring.nacos";
  		BindResult<String> bind = binder.bind("spring.nacos.properties.prefix", String.class);
  		if (!bind.isBound()) {
  			if (StringUtils.isNotBlank(NacosPropertiesPrefixer.PREFIX)) {
  				prefix = NacosPropertiesPrefixer.PREFIX;
  			}
  		}
  		else {
  			prefix = bind.get();
  		}
  
  		if (StringUtils.isNotBlank(prefix) && prefix.endsWith(".")) {
  			prefix = prefix.substring(0, prefix.length() - 1);
  		}
  		return prefix;
  	}
  
  }
  