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.validator;
  
  import com.alibaba.compileflow.engine.bpmn.definition.BpmnModel;
  import com.alibaba.compileflow.engine.core.builder.validator.AbstractFlowModelValidator;
  import com.alibaba.compileflow.engine.core.builder.validator.FlowModelValidator;
  import com.alibaba.compileflow.engine.core.builder.validator.ValidateMessage;
  import com.alibaba.compileflow.engine.core.extension.ExtensionRealization;
  
  import java.util.List;
  import java.util.Optional;
  
  /**
   * Validator for the {@link BpmnModel}.
   * <p>
   * This class is responsible for checking the semantic and structural correctness of a
   * parsed BPMN model before it is compiled. It extends the abstract base validator
   * to inherit common validation logic and implements the {@link FlowModelValidator}
   * interface to integrate with the engine's validation extension mechanism.
   *
   * @author yusu
   */
  @ExtensionRealization()
  public class BpmnModelValidator extends AbstractFlowModelValidator<BpmnModel>
          implements FlowModelValidator<BpmnModel> {
  
      @Override
      public List<ValidateMessage> validate(BpmnModel flowModel) {
          List<ValidateMessage> validateMessages = super.validate(flowModel);
          // BPMN-specific validation logic would be added here.
          // For example, checking for disconnected sequence flows, verifying that
          // start events have no incoming flows, etc.
          return validateMessages;
      }
  
      @Override
      public boolean support(FlowModelValidatorExtensionContext flowModelValidatorContext) {
          return Optional.of(flowModelValidatorContext).map(FlowModelValidatorExtensionContext::getFlowModel)
                  .map(e -> e instanceof BpmnModel).orElse(false);
      }
  
  }
  