content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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.compileflow.engine.core.definition;
  
  /**
   * Represents a directed connection (an edge) between two nodes in a process graph.
   *
   * <p>A transition may have an associated expression, which acts as a condition.
   * For a transition to be taken, its condition must evaluate to {@code true}.
   *
   * @author yusu
   */
  public interface Transition extends HasExpression {
  
      /**
       * Gets the ID of the source node from which this transition originates.
       *
       * @return The ID of the source node.
       */
      String getSource();
  
      /**
       * Gets the ID of the target node to which this transition points.
       *
       * @return The ID of the target node.
       */
      String getTarget();
  
      /**
       * Gets the priority of this transition, used to determine the evaluation
       * order when multiple transitions originate from the same decision gateway.
       * <p>
       * Lower numbers indicate higher priority.
       *
       * @return The priority value.
       */
      int getPriority();
  
  }
  