SAAJ与MTOM + XOP兼容吗?

时间:2016-07-26 17:36:08

标签: java spring-ws mtom saaj xop

我正在尝试使用MTOM + XOP在Spring Web Service中返回byte [],但是当编组结果时,它会抛出SAXParseException并显示消息:

cvc-type.3.1.2:元素'dataHandler'是一个简单类型,因此它必须没有元素信息项[children]。

似乎在编写XOP标记之后,验证器会遇到它而不是它期望的byte []内容,并抛出一个停止进程的FATAL级别的SAXParseException。

我正在使用:

  • JDK 1.7
  • SAAJ 1.3
  • SOAP 1.1
  • Spring 4.1.4.RELEASE
  • Spring WS 2.2.0.RELEASE

提前致谢

2 个答案:

答案 0 :(得分:2)

我找到了两种解决方法:

  1. 未将xmlschema设置为marshaller。

  2. ValidationEventHandler设置为跳过XOP失败的编组程序。

  3. 这是将ValidationEventHandler设置为marshaller以跳过XOP失败的示例:

    抽象超类:

    import javax.xml.bind.ValidationEvent;
    import javax.xml.bind.ValidationEventHandler;
    
    abstract class XopAwareValidationEventHandler implements ValidationEventHandler {
    
      private static final String CVC_TYPE_3_1_2 = "cvc-type.3.1.2";
    
      private ValidationEventHandler realHandler;
    
      XopAwareValidationEventHandler(final ValidationEventHandler handler) {
        this.setRealHandler(handler);
      }
    
      @Override
      public boolean handleEvent(final ValidationEvent event) {
        final boolean result = this.getRealHandler().handleEvent(event);
        if (!result) {
          if (event.getMessage() != null && event.getMessage().startsWith(CVC_TYPE_3_1_2)) {
            return this.isXopEvent(event);
          }
        }
        return result;
      }
    
      abstract boolean isXopEvent(ValidationEvent validationEvent);
    
      private ValidationEventHandler getRealHandler() {
        return realHandler;
      }
    
      private void setRealHandler(final ValidationEventHandler realHandler) {
        this.realHandler = realHandler;
      }
    }
    

    unmarshaller的具体类:

    import javax.xml.bind.ValidationEvent;
    import javax.xml.bind.ValidationEventHandler;
    
    class XopAwareUnmarshallingValidationEventHandler extends XopAwareValidationEventHandler {
    
      private static final String XOP_INCLUDE = "xop:Include";
    
      XopAwareUnmarshallingValidationEventHandler(final ValidationEventHandler handler) {
        super(handler);
      }
    
      @Override
      boolean isXopEvent(final ValidationEvent validationEvent) {
        final ValidationEventLocator locator = validationEvent.getLocator();
        return locator != null && locator.getNode() != null &&
            locator.getNode().getFirstChild() != null &&
            XOP_INCLUDE.equals(locator.getNode().getFirstChild().getNodeName());
      }
    }
    

    对于marshaller我正在搜索标识案例的条件,因为ValidationEventLocator只有对象设置,它可以是任何东西。

    import javax.xml.bind.ValidationEvent;
    import javax.xml.bind.ValidationEventHandler;
    import javax.xml.bind.ValidationEventLocator;
    
    public class XopAwareMarshallingValidationEventHandler extends XopAwareValidationEventHandler {
    
      public XopAwareMarshallingValidationEventHandler(final ValidationEventHandler handler) {
        super(handler);
      }
    
      boolean isXopEvent(final ValidationEvent validationEvent) {
        final ValidationEventLocator locator = validationEvent.getLocator();
        return locator != null && locator.getNode() == null;
      }
    }
    

    org.springframework.oxm.jaxb.Jaxb2Marshaller子类激活MTOM并添加两个事件处理程序:

    import javax.xml.bind.JAXBException;
    import javax.xml.bind.Marshaller;
    import javax.xml.bind.Unmarshaller;
    
    import org.springframework.oxm.jaxb.Jaxb2Marshaller;
    
    import XopAwareMarshallingValidationEventHandler;
    import XopAwareUnmarshallingValidationEventHandler;
    
    public class XopAwareJaxb2Marshaller extends Jaxb2Marshaller {
    
      public XopAwareJaxb2Marshaller() {
        this.setMtomEnabled(true);
      }
    
      protected void initJaxbMarshaller(final Marshaller marshaller) throws JAXBException {
        super.initJaxbMarshaller(marshaller);
    
        marshaller.setEventHandler(new XopAwareMarshallingValidationEventHandler(marshaller.getEventHandler()));
      }
    
      protected void initJaxbUnmarshaller(final Unmarshaller unmarshaller) throws JAXBException {
        super.initJaxbUnmarshaller(unmarshaller);
    
        unmarshaller.setEventHandler(new XopAwareUnmarshallingValidationEventHandler(unmarshaller
            .getEventHandler()));
      }
    }
    

答案 1 :(得分:0)

这不是SAAJ的问题,而是使用Spring-WS。这是因为Spring-WS将XOP编码的消息传递给模式验证器,而模式验证器并不理解XOP。最终问题是Spring-WS没有为XOP / MTOM定义明确的处理模型,正如我在this article中所解释的那样。