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.prompt.impl;
  
  import lombok.Data;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Map;
  import java.util.regex.Matcher;
  import java.util.stream.Collectors;
  
  /**
   * 包含少量样本示例的提示模板
   *
   * @author xiaoxuan.lp
   */
  @Data
  public class FewShotPromptTemplate extends StringPromptTemplate {
  
      private List<Map<String, Object>> examples;
  
      private PromptTemplate examplePrompt;
  
      private String suffix;
  
      private String prefix;
  
      private String exampleSeparator = "\n\n";
  
      @Override
      public String format(Map<String, Object> args) {
          if(examples != null) {
              List<String> exampleStrings = examples.stream()
                      .map(example -> examplePrompt.format(example)).collect(Collectors.toList());
  
              List<String> pieces = new ArrayList<>();
              pieces.add(prefix);
              pieces.addAll(exampleStrings);
              pieces.add(suffix);
  
              String prompt = pieces.stream().collect(Collectors.joining(exampleSeparator));
  
              if (args == null) {
                  return prompt;
              }
              String realTemplate = prompt;
              for (Map.Entry<String, Object> entry : args.entrySet()) {
                  if (entry.getValue() instanceof String) {
                      realTemplate = realTemplate.replaceAll("\\{" + entry.getKey() + "\\}", Matcher.quoteReplacement(entry.getValue().toString()));
                  }
                  return realTemplate;
              }
          }
          return null;
      }
  
      @Override
      public String getPromptType() {
          return "few_shot";
      }
  }
  