content: /**
   * Copyright (C) 2024 AIDC-AI
   *
   * 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.alibaba.langengine.core.chain.tot;
  
  import com.alibaba.langengine.core.callback.ExecutionContext;
  import com.alibaba.langengine.core.chain.Chain;
  
  import java.util.Arrays;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.function.Consumer;
  
  /**
   * Tree of Thought (ToT) checker.
   *
   * This is an abstract ToT checker that must be implemented by the user. You
   * can implement a simple rule-based checker or a more sophisticated
   * neural network based classifier.
   *
   * @author xiaoxuan.lp
   */
  public abstract class ToTChecker extends Chain {
  
      private String outputKey = "validity";
  
      @Override
      public Map<String, Object> call(Map<String, Object> inputs, ExecutionContext executionContext, Consumer<String> consumer, Map<String, Object> extraAttributes) {
          Map<String, Object> result = new HashMap<>();
          result.put(outputKey, evaluate((String)inputs.get("problem_description"), (List<String>)inputs.get("thoughts")));
          return result;
      }
  
      @Override
      public List<String> getInputKeys() {
          return Arrays.asList(new String[] { "problem_description", "thoughts" });
      }
  
      @Override
      public List<String> getOutputKeys() {
          return Arrays.asList(outputKey);
      }
  
      public abstract ThoughtValidity evaluate(String problemDescription, List<String> thoughts);
  }
  