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 com.alibaba.cloud.ai.graph.checkpoint.config;
  
  import com.alibaba.cloud.ai.graph.checkpoint.BaseCheckpointSaver;
  import com.alibaba.cloud.ai.graph.checkpoint.constant.SaverEnum;
  import jodd.util.StringUtil;
  
  import java.util.Map;
  import java.util.concurrent.ConcurrentHashMap;
  
  public class SaverConfig {
  
  	private Map<String, BaseCheckpointSaver> savers = new ConcurrentHashMap<>();
  
  	private String type = SaverEnum.MEMORY.getValue();
  
  	public String getType() {
  		return type;
  	}
  
  	public SaverConfig setType(String type) {
  		this.type = type;
  		return this;
  	}
  
  	public static Builder builder() {
  		return new Builder();
  	}
  
  	public SaverConfig register(String type, BaseCheckpointSaver saver) {
  		// or computeIfPresent?
  		savers.computeIfAbsent(type, s -> saver);
  		return this;
  	}
  
  	public BaseCheckpointSaver get(String type) {
  		if (StringUtil.isEmpty(type))
  			throw new IllegalArgumentException("type isn't allow null");
  		return savers.get(type);
  	}
  
  	public BaseCheckpointSaver get() {
  		if (savers.size() == 1) {
  			return savers.values().iterator().next();
  		}
  		return savers.get(this.type);
  	}
  
  	public static class Builder {
  
  		private final SaverConfig config;
  
  		Builder() {
  			this.config = new SaverConfig();
  		}
  
  		public Builder type(String type) {
  			this.config.type = type;
  			return this;
  		}
  
  		public Builder register(String type, BaseCheckpointSaver saver) {
  			this.config.register(type, saver);
  			return this;
  		}
  
  		public SaverConfig build() {
  			return this.config;
  		}
  
  	}
  
  }
  