content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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 com.datastax.oss.driver.internal.mapper.processor.util;
  
  import java.util.HashMap;
  import java.util.Map;
  
  /** Ensures the unicity of the members of a generated class. */
  public class NameIndex {
  
    private Map<String, Integer> fieldIndices = new HashMap<>();
  
    /**
     * Generates a field or constant name that is unique across this index: if the given name is free,
     * it's used as-is, otherwise an incrementing index is appended to it.
     */
    public String uniqueField(String baseName) {
      Integer index = fieldIndices.compute(baseName, (k, v) -> (v == null) ? 0 : v + 1);
      return (index == 0) ? baseName : baseName + index;
    }
  }
  