content: package com.ctrip.framework.apollo.common.utils;
  
  import com.ctrip.framework.apollo.core.utils.StringUtils;
  
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  /**
   * @author Jason Song(song_s@ctrip.com)
   */
  public class InputValidator {
    public static final String INVALID_CLUSTER_NAMESPACE_MESSAGE = "只允许输入数字，字母和符号 - _ .";
    public static final String INVALID_NAMESPACE_NAMESPACE_MESSAGE = "不允许以.json, .yml, .yaml, .xml, .properties结尾";
    public static final String CLUSTER_NAMESPACE_VALIDATOR = "[0-9a-zA-Z_.-]+";
    public static final String APP_NAMESPACE_VALIDATOR = "[a-zA-Z0-9._-]+(?<!\\.(json|yml|yaml|xml|properties))$";
    private static final Pattern CLUSTER_NAMESPACE_PATTERN =
        Pattern.compile(CLUSTER_NAMESPACE_VALIDATOR);
    private static final Pattern APP_NAMESPACE_PATTERN =
        Pattern.compile(APP_NAMESPACE_VALIDATOR);
  
  
    public static boolean isValidClusterNamespace(String input) {
      Matcher matcher = CLUSTER_NAMESPACE_PATTERN.matcher(input);
      return matcher.matches();
    }
  
    public static boolean isValidAppNamespace(String name){
      if (StringUtils.isEmpty(name)){
        return false;
      }
      return CLUSTER_NAMESPACE_PATTERN.matcher(name).matches() && APP_NAMESPACE_PATTERN.matcher(name).matches();
    }
  }
  