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.action;
  
  import com.alibaba.cloud.ai.graph.OverAllState;
  
  import java.util.Map;
  import java.util.Objects;
  import java.util.Optional;
  
  /**
   * Represents the outcome of a {@link CommandAction} within a graph. A {@code Command}
   * encapsulates instructions for the graph's next step, including an optional target node
   * to transition to and a map of updates to be applied to the {@link OverAllState}.
   *
   * @param gotoNode containing the name of the next node to execute.
   * @param update A {@link Map} containing key-value pairs representing updates to be
   * merged into the current agent state. An empty map indicates no state updates.
   */
  public record Command(String gotoNode, Map<String, Object> update) {
  
  	public Command {
  		Objects.requireNonNull(gotoNode, "gotoNode cannot be null");
  		Objects.requireNonNull(update, "update cannot be null");
  	}
  
  	/**
  	 * Constructs a {@code Command} that specifies only the next node to transition to,
  	 * with no state updates. If {@code gotoNode} is null, it will be treated as an empty
  	 * {@link Optional}.
  	 * @param gotoNode The name of the next node to transition to. Can be null.
  	 */
  	public Command(String gotoNode) {
  		this(gotoNode, Map.of());
  	}
  
  }
  