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Liferay Frontend JS Minifier
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/*
 * Copyright 2015 The Closure Compiler 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
 *
 *     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.google.javascript.jscomp;

import java.io.Serializable;
import java.util.Set;
import javax.annotation.Nullable;

/** A class that generates unique JavaScript variable/property names. */
public interface NameGenerator extends Serializable {

  /**
   * Reconfigures this NameGenerator, and resets it to the initial state.
   *
   * @param reservedNames set of names that are reserved; generated names will not include these
   *     names. This set is referenced rather than copied, so changes to the set will be reflected
   *     in how names are generated.
   * @param prefix all generated names begin with this prefix.
   * @param reservedCharacters If specified these characters won't be used in generated names
   */
  void reset(Set reservedNames, String prefix, @Nullable char[] reservedCharacters);

  /**
   * Reconfigures this NameGenerator, and resets it to the initial state.
   *
   * @param reservedNames set of names that are reserved; generated names will not include these
   *     names. This set is referenced rather than copied, so changes to the set will be reflected
   *     in how names are generated.
   * @param prefix all generated names begin with this prefix.
   * @param reservedFirstCharacters If specified these characters won't be used as the first
   *     character in generated names
   * @param reservedNonFirstCharacters If specified these characters won't be used for characters
   *     (after the first) in generated names
   */
  void reset(
      Set reservedNames,
      String prefix,
      @Nullable char[] reservedFirstCharacters,
      @Nullable char[] reservedNonFirstCharacters);

  /**
   * Returns a clone of this NameGenerator, reconfigured and reset.
   */
  NameGenerator clone(
      Set reservedNames,
      String prefix,
      @Nullable char[] reservedCharacters);

  /** Generates the next name. */
  public String generateNextName();
}