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.bpmn.builder.generator;
  
  import com.alibaba.compileflow.engine.bpmn.definition.FlowNode;
  import com.alibaba.compileflow.engine.bpmn.definition.SubProcess;
  import com.alibaba.compileflow.engine.core.builder.generator.CodeGenerator;
  import com.alibaba.compileflow.engine.core.builder.generator.GeneratorContext;
  import com.alibaba.compileflow.engine.core.builder.generator.GeneratorFactory;
  import com.alibaba.compileflow.engine.core.builder.generator.code.CodeTargetSupport;
  import org.apache.commons.collections4.CollectionUtils;
  
  import java.util.List;
  
  /**
   * Generator for BPMN SubProcess elements.
   * <p>
   * SubProcess in BPMN represents an embedded sub-process that contains its own flow elements.
   * Unlike CallActivity, SubProcess should generate inline code rather than calling external processes.
   * This aligns with BPMN 2.0 semantics where SubProcess is expanded within the parent process.
   *
   * <p><b>Implementation Strategy:</b></p>
   * <ul>
   *   <li><b>Embedded SubProcess:</b> When flowElements are present, generate inline code for contained nodes</li>
   * </ul>
   *
   * @author yusu
   */
  public class SubProcessGenerator extends AbstractBpmnNodeGenerator<SubProcess> {
  
      public SubProcessGenerator(GeneratorContext context, SubProcess flowNode) {
          super(context, flowNode);
      }
  
      @Override
      public void generateCode(CodeTargetSupport codeTargetSupport) {
          generateNodeComment(codeTargetSupport);
  
          List<FlowNode> subProcessNodes = flowNode.getAllNodes();
          if (CollectionUtils.isNotEmpty(subProcessNodes)) {
              generateEmbeddedSubProcess(codeTargetSupport);
          }
      }
  
      private void generateEmbeddedSubProcess(CodeTargetSupport codeTargetSupport) {
          codeTargetSupport.addBodyLine("{");
          CodeGenerator containerGenerator = GeneratorFactory.getInstance().getContainerGenerator(flowNode, context);
          containerGenerator.generateCode(codeTargetSupport);
          codeTargetSupport.addBodyLine("}");
      }
  
  }
  