content: /*
   * Copyright 2010-2025 Hyland Software, Inc. and its affiliates.
   *
   * 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
   *
   *     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 org.activiti.bpmn.converter.parser;
  
  import javax.xml.stream.XMLStreamReader;
  import org.activiti.bpmn.constants.BpmnXMLConstants;
  import org.activiti.bpmn.converter.util.BpmnXMLUtil;
  import org.activiti.bpmn.model.BpmnModel;
  import org.activiti.bpmn.model.Interface;
  import org.activiti.bpmn.model.Operation;
  import org.apache.commons.lang3.StringUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
  
   */
  public class InterfaceParser implements BpmnXMLConstants {
  
      protected static final Logger LOGGER = LoggerFactory.getLogger(InterfaceParser.class.getName());
  
      public void parse(XMLStreamReader xtr, BpmnModel model) throws Exception {
          Interface interfaceObject = new Interface();
          BpmnXMLUtil.addXMLLocation(interfaceObject, xtr);
          interfaceObject.setId(model.getTargetNamespace() + ":" + xtr.getAttributeValue(null, ATTRIBUTE_ID));
          interfaceObject.setName(xtr.getAttributeValue(null, ATTRIBUTE_NAME));
          interfaceObject.setImplementationRef(
              parseMessageRef(xtr.getAttributeValue(null, ATTRIBUTE_IMPLEMENTATION_REF), model)
          );
  
          boolean readyWithInterface = false;
          Operation operation = null;
          try {
              while (!readyWithInterface && xtr.hasNext()) {
                  xtr.next();
                  if (xtr.isStartElement() && ELEMENT_OPERATION.equals(xtr.getLocalName())) {
                      operation = new Operation();
                      BpmnXMLUtil.addXMLLocation(operation, xtr);
                      operation.setId(model.getTargetNamespace() + ":" + xtr.getAttributeValue(null, ATTRIBUTE_ID));
                      operation.setName(xtr.getAttributeValue(null, ATTRIBUTE_NAME));
                      operation.setImplementationRef(
                          parseMessageRef(xtr.getAttributeValue(null, ATTRIBUTE_IMPLEMENTATION_REF), model)
                      );
                  } else if (xtr.isStartElement() && ELEMENT_IN_MESSAGE.equals(xtr.getLocalName())) {
                      String inMessageRef = xtr.getElementText();
                      if (operation != null && StringUtils.isNotEmpty(inMessageRef)) {
                          operation.setInMessageRef(parseMessageRef(inMessageRef.trim(), model));
                      }
                  } else if (xtr.isStartElement() && ELEMENT_OUT_MESSAGE.equals(xtr.getLocalName())) {
                      String outMessageRef = xtr.getElementText();
                      if (operation != null && StringUtils.isNotEmpty(outMessageRef)) {
                          operation.setOutMessageRef(parseMessageRef(outMessageRef.trim(), model));
                      }
                  } else if (xtr.isEndElement() && ELEMENT_OPERATION.equalsIgnoreCase(xtr.getLocalName())) {
                      if (operation != null && StringUtils.isNotEmpty(operation.getImplementationRef())) {
                          interfaceObject.getOperations().add(operation);
                      }
                  } else if (xtr.isEndElement() && ELEMENT_INTERFACE.equals(xtr.getLocalName())) {
                      readyWithInterface = true;
                  }
              }
          } catch (Exception e) {
              LOGGER.warn("Error parsing interface child elements", e);
          }
  
          model.getInterfaces().add(interfaceObject);
      }
  
      protected String parseMessageRef(String messageRef, BpmnModel model) {
          String result = null;
          if (StringUtils.isNotEmpty(messageRef)) {
              int indexOfP = messageRef.indexOf(':');
              if (indexOfP != -1) {
                  String prefix = messageRef.substring(0, indexOfP);
                  String resolvedNamespace = model.getNamespace(prefix);
                  messageRef = messageRef.substring(indexOfP + 1);
  
                  if (resolvedNamespace == null) {
                      // if it's an invalid prefix will consider this is not a
                      // namespace prefix so will be used as part of the
                      // stringReference
                      messageRef = prefix + ":" + messageRef;
                  } else if (!resolvedNamespace.equalsIgnoreCase(model.getTargetNamespace())) {
                      // if it's a valid namespace prefix but it's not the
                      // targetNamespace then we'll use it as a valid namespace
                      // (even out editor does not support defining namespaces it
                      // is still a valid xml file)
                      messageRef = resolvedNamespace + ":" + messageRef;
                  }
              }
              result = messageRef;
          }
          return result;
      }
  }
  