content: /*
   * Copyright 2010-2025 Hyland Software, Inc. and its affiliates.
   *
   * 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
   *
   *     http://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 org.activiti.runtime.api.impl;
  
  import java.util.HashSet;
  import java.util.Map;
  import java.util.Set;
  import java.util.regex.Pattern;
  import org.springframework.util.StringUtils;
  
  public class VariableNameValidator {
  
      public static String regexPattern = "(?i)[a-z][a-z0-9_]*";
  
      public boolean validate(String name) {
          if (StringUtils.hasLength(name)) {
              if (Pattern.compile(regexPattern).matcher(name).matches()) {
                  return true;
              }
          }
          return false;
      }
  
      public Set<String> validateVariables(Map<String, Object> variables) {
          Set<String> mismatchedVars = new HashSet<>();
          if (variables != null && !variables.isEmpty()) {
              for (Map.Entry<String, Object> variable : variables.entrySet()) {
                  if (!validate(variable.getKey())) {
                      mismatchedVars.add(variable.getKey());
                  }
              }
          }
  
          return mismatchedVars;
      }
  }
  