如何让 Axis 1.4 不为同一个 XML 命名空间生成多个前缀？

Question

我正在接收来自使用 Axis 1.4 库的客户端的 SOAP 请求。请求具有以下形式：

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" 
                  xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
                  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <soapenv:Body>
    <PlaceOrderRequest xmlns="http://example.com/schema/order/request">
      <order>
        <ns1:requestParameter xmlns:ns1="http://example.com/schema/common/request">
          <ns1:orderingSystemWithDomain>
            <ns1:orderingSystem>Internet</ns1:orderingSystem>
            <ns1:domainSign>2</ns1:domainSign>
          </ns1:orderingSystemWithDomain>
        </ns1:requestParameter>
        <ns2:directDeliveryAddress ns2:addressType="0" ns2:index="1" 
                                   xmlns:ns2="http://example.com/schema/order/request">
          <ns3:address xmlns:ns3="http://example.com/schema/common/request">
            <ns4:zipcode xmlns:ns4="http://example.com/schema/common">12345</ns4:zipcode>
            <ns5:city xmlns:ns5="http://example.com/schema/common">City</ns5:city>
            <ns6:street xmlns:ns6="http://example.com/schema/common">Street</ns6:street>
            <ns7:houseNum xmlns:ns7="http://example.com/schema/common">1</ns7:houseNum>
            <ns8:country xmlns:ns8="http://example.com/schema/common">XX</ns8:country>
          </ns3:address>
[...]

如您所见，为同一个命名空间定义了多个前缀，例如命名空间 http://example.com/schema/common 具有前缀 ns4、ns5、ns6、ns7 和 ns8。一些长请求为同一个命名空间定义了数百个前缀。

这导致Saxon XSLT 处理器出现问题，我用它来转换请求。 Saxon 将同一命名空间的不同前缀数量限制为 255 个，并在定义更多前缀时引发异常。

Axis 1.4 能否配置为定义更智能的前缀，以便每个命名空间只有一个前缀？

Answer 1

我也有同样的问题。目前，我通过编写 BasicHandler 扩展来解决它，然后自己遍历 SOAPPart 并将名称空间引用向上移动到父节点。我不喜欢这个解决方案，但它似乎确实有效。

我真的希望有人过来告诉我们必须做什么。

编辑

这太复杂了，就像我说的，我一点也不喜欢它，但我们开始吧。我实际上将功能分解为几个类（这不是我们在那个项目中需要做的唯一操作，所以还有其他实现）我真的希望有人能尽快解决这个问题。这使用 dom4j 来处理通过 SOAP 进程的 XML，因此您需要 dom4j 才能使其工作。

public class XMLManipulationHandler extends BasicHandler {
    private static Log log = LogFactory.getLog(XMLManipulationHandler.class);
    private static List processingHandlers;

    public static void setProcessingHandlers(List handlers) {
        processingHandlers = handlers;
    }

    protected Document process(Document doc) {
        if (processingHandlers == null) {
            processingHandlers = new ArrayList();
            processingHandlers.add(new EmptyProcessingHandler());
        }
        log.trace(processingHandlers);
        treeWalk(doc.getRootElement());
        return doc;
    }

    protected void treeWalk(Element element) {
        for (int i = 0, size = element.nodeCount(); i < size; i++) {
            Node node = element.node(i);
            for (int handlerIndex = 0; handlerIndex < processingHandlers.size(); handlerIndex++) {
                ProcessingHandler handler = (ProcessingHandler) processingHandlers.get(handlerIndex);
                handler.process(node);
            }
            if (node instanceof Element) {
                treeWalk((Element) node);
            }
        }
    }

    public void invoke(MessageContext context) throws AxisFault {
        if (!context.getPastPivot()) {
            SOAPMessage message = context.getMessage();
            SOAPPart soapPart = message.getSOAPPart();
            ByteArrayOutputStream baos = new ByteArrayOutputStream();

            try {
                message.writeTo(baos);
                baos.flush();
                baos.close();

                ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
                SAXReader saxReader = new SAXReader();
                Document doc = saxReader.read(bais);
                doc = process(doc);
                DocumentSource ds = new DocumentSource(doc);
                soapPart.setContent(ds);
                message.saveChanges();
            } catch (Exception e) {
                throw new AxisFault("Error Caught processing document in XMLManipulationHandler", e);
            }
        }
    }
}

public interface ProcessingHandler {
    public Node process(Node node);
}

public class NamespaceRemovalHandler implements ProcessingHandler {
    private static Log log = LogFactory.getLog(NamespaceRemovalHandler.class);
    private Namespace namespace;
    private String targetElement;
    private Set ignoreElements;

    public NamespaceRemovalHandler() {
        ignoreElements = new HashSet();
    }

    public Node process(Node node) {
        if (node instanceof Element) {
            Element element = (Element) node;
            if (element.isRootElement()) {
                // Evidently, we never actually see the root node when we're called from
                // SOAP...
            } else {
                if (element.getName().equals(targetElement)) {
                    log.trace("Found the target Element.  Adding requested namespace");
                    Namespace already = element.getNamespaceForURI(namespace.getURI());
                    if (already == null) {
                        element.add(namespace);
                    }
                } else if (!ignoreElements.contains(element.getName())) {
                    Namespace target = element.getNamespaceForURI(namespace.getURI());
                    if (target != null) {
                        element.remove(target);
                        element.setQName(new QName(element.getName(), namespace));
                    }
                }

                Attribute type = element.attribute("type");
                if (type != null) {
                    log.trace("Replacing type information: " + type.getText());
                    String typeText = type.getText();
                    typeText = typeText.replaceAll("ns[0-9]+", namespace.getPrefix());
                    type.setText(typeText);
                }
            }
        }

        return node;
    }

    public Namespace getNamespace() {
        return namespace;
    }

    public void setNamespace(Namespace namespace) {
        this.namespace = namespace;
    }

    /**
     * @return the targetElement
     */
    public String getTargetElement() {
        return targetElement;
    }

    /**
     * @param targetElement the targetElement to set
     */
    public void setTargetElement(String targetElement) {
        this.targetElement = targetElement;
    }

    /**
     * @return the ignoreElements
     */
    public Set getIgnoreElements() {
        return ignoreElements;
    }

    /**
     * @param ignoreElements the ignoreElements to set
     */
    public void setIgnoreElements(Set ignoreElements) {
        this.ignoreElements = ignoreElements;
    }

    public void addIgnoreElement(String element) {
        this.ignoreElements.add(element);
    }
}

无保修等。

Answer 2

对于请求，我使用它来删除命名空间类型：

String endpoint = "http://localhost:5555/yourService";

// Parameter to be send
Integer secuencial = new Integer(11);  // 0011

// Make the call
Service  service = new Service();

Call call = (Call) service.createCall();

// Disable sending Multirefs
call.setOption( org.apache.axis.AxisEngine.PROP_DOMULTIREFS, new java.lang.Boolean( false) ); 

// Disable sending xsi:type
call.setOption(org.apache.axis.AxisEngine.PROP_SEND_XSI, new java.lang.Boolean( false));  

// XML with new line
call.setOption(org.apache.axis.AxisEngine.PROP_DISABLE_PRETTY_XML, new java.lang.Boolean( false)); 

// Other Options. You will not need them
call.setOption(org.apache.axis.AxisEngine.PROP_ENABLE_NAMESPACE_PREFIX_OPTIMIZATION, new java.lang.Boolean( true)); 
call.setOption(org.apache.axis.AxisEngine.PROP_DOTNET_SOAPENC_FIX, new java.lang.Boolean( true));

call.setTargetEndpointAddress(new java.net.URL(endpoint));
call.setSOAPActionURI("http://YourActionUrl");//Optional

// Opertion Name
//call.setOperationName( "YourMethod" );
call.setOperationName(new javax.xml.namespace.QName("http://yourUrl", "YourMethod"));      

// Do not send encoding style
call.setEncodingStyle(null);

// Do not send xmlns in the xml nodes
call.setProperty(org.apache.axis.client.Call.SEND_TYPE_ATTR, Boolean.FALSE);

/////// Configuration of namespaces
org.apache.axis.description.OperationDesc oper;
org.apache.axis.description.ParameterDesc param;
oper = new org.apache.axis.description.OperationDesc();
oper.setName("InsertaTran");
param = new org.apache.axis.description.ParameterDesc(new javax.xml.namespace.QName("http://yourUrl", "secuencial"), org.apache.axis.description.ParameterDesc.IN, new javax.xml.namespace.QName("http://www.w3.org/2001/XMLSchema", "int"), int.class, false, false);
oper.addParameter(param);

oper.setReturnType(new javax.xml.namespace.QName("http://www.w3.org/2001/XMLSchema", "int"));
oper.setReturnClass(int.class);
oper.setReturnQName(new javax.xml.namespace.QName("http://yourUrl", "yourReturnMethod"));
oper.setStyle(org.apache.axis.constants.Style.WRAPPED);
oper.setUse(org.apache.axis.constants.Use.LITERAL);

call.setOperation(oper);

Integer ret = (Integer) call.invoke( new java.lang.Object [] 
            { secuencial });

Answer 3

更改客户的 wsdd 以将 enableNamespacePrefixOptimization 设置为 true

<globalConfiguration >
  <parameter name="enableNamespacePrefixOptimization" value="true"/>