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.agent.flow.node;
  
  import java.util.HashMap;
  import java.util.Map;
  
  import com.alibaba.cloud.ai.graph.OverAllState;
  import com.alibaba.cloud.ai.graph.action.NodeAction;
  
  /**
   * A node action that evaluates conditions to determine the next execution path. This
   * class examines the state and sets a condition flag for routing decisions.
   */
  public class ConditionEvaluator implements NodeAction {
  
  	private static final String CONDITION_KEY = "_condition_result";
  
  	@Override
  	public Map<String, Object> apply(OverAllState state) throws Exception {
  		Map<String, Object> updatedState = new HashMap<>();
  
  		// Default condition evaluation logic
  		// This can be extended to support custom condition evaluation
  		String conditionResult = evaluateCondition(state);
  		updatedState.put(CONDITION_KEY, conditionResult);
  
  		return updatedState;
  	}
  
  	/**
  	 * Evaluates the condition based on the current state. Override this method to
  	 * implement custom condition logic.
  	 * @param state the current state
  	 * @return the condition result string
  	 */
  	protected String evaluateCondition(OverAllState state) {
  		// Simple example: check if input contains certain keywords
  		String input = state.value("input", "").toString().toLowerCase();
  
  		if (input.contains("error") || input.contains("exception")) {
  			return "error_handling";
  		}
  		else if (input.contains("data") || input.contains("analyze")) {
  			return "data_processing";
  		}
  		else if (input.contains("report") || input.contains("summary")) {
  			return "report_generation";
  		}
  		else {
  			return "default";
  		}
  	}
  
  	public static Builder builder() {
  		return new Builder();
  	}
  
  	public static class Builder {
  
  		public ConditionEvaluator build() {
  			return new ConditionEvaluator();
  		}
  
  	}
  
  }
  