content: /*
   * Copyright 2024-2025 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 io.agentscope.core.formatter;
  
  import java.util.List;
  import java.util.Map;
  
  /**
   * Interface for counting tokens in formatted messages.
   *
   * Different LLM providers use different tokenization schemes,
   * so this interface allows for provider-specific token counting
   * implementations.
   */
  public interface TokenCounter {
  
      /**
       * Count the tokens in a list of formatted messages.
       *
       * @param formattedMessages List of messages in API format
       * @return Number of tokens
       */
      int countTokens(List<Map<String, Object>> formattedMessages);
  
      /**
       * Count tokens in a single text string.
       *
       * @param text Text to count tokens for
       * @return Number of tokens
       */
      int countTokens(String text);
  
      /**
       * Get the name of this token counter (e.g., "OpenAI-GPT4", "Anthropic-Claude").
       *
       * @return Token counter name
       */
      String getName();
  }
  