Java，根据 WSDL 中的嵌入式模式验证 XML

Question

我有一个 .wsdl具有嵌入式模式的文件。我想使用 .wsdl 验证 XML 文件/字符串文件(与验证 .xsd 的方式相同)。模式介于 <types> 之间标签。到目前为止我有这个:

public boolean validate(String xmlString) {
    try {
        // Convert to input stream
        InputStream xml = new ByteArrayInputStream(xmlString.getBytes());

        SchemaFactory schemaFactory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
        Schema schema = schemaFactory.newSchema(new File("wsdl_filepath"));

        // Validate against wsdl
        Validator validator = schema.newValidator();
        validator.validate(new StreamSource (xml));

        // XML Message is valid
        return true;

    } catch (SAXException e) {
        e.printStackTrace();
        return false;

    } catch (IOException e) {
        e.printStackTrace();
        return false;
    }
}

但是，这不起作用。如果针对 .xsd 进行验证，则此 validator 有效.我不确定如何修改它以针对嵌入式架构进行验证。

如有任何帮助，我们将不胜感激，谢谢!

Answer 1

以下是我从 wsld 中提取模式的方法:

public static Schema makeSchema(String pathToWsdl)
    throws ParserConfigurationException, IOException, SAXException, InstantiationException, IllegalAccessException, ClassNotFoundException {
    // read wsdl document
    File wsdlFile = new File(pathToWsdl);
    DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
    dbFactory.setNamespaceAware(true);
    DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
    Document wsdlDoc = dBuilder.parse(wsdlFile);

    // read namespace declarations from wsdl document, in case they are referred from a schema
    NamedNodeMap attributes = wsdlDoc.getDocumentElement().getAttributes();
    Map<String, String> namespacesFromWsdlDocument = new HashMap<>();
    for (int i = 0; i < attributes.getLength(); i++) {
        Node n = attributes.item(i);
        if (n.getNamespaceURI() != null && n.getNamespaceURI().equals("http://www.w3.org/2000/xmlns/")) {
            namespacesFromWsdlDocument
                .put(n.getLocalName(), n.getNodeValue());
        }
    }

    // read the schema nodes from the wsdl
    NodeList schemas = wsdlDoc.getElementsByTagNameNS("http://www.w3.org/2001/XMLSchema", "schema");
    Map<String, DOMSource> sources = new HashMap<>();
    for (int i = 0; i < schemas.getLength(); i++) {
        // create a document for each schema and copy the source schema
        Document schema = dBuilder.newDocument();
        Element schemaElement = (Element)schema.importNode(schemas.item(i), true);

        // add all non-existing namespace declarations from the wsdl node
        String targetNs = schemaElement.getAttribute("targetNamespace");
        for (Map.Entry<String, String> ns : namespacesFromWsdlDocument.entrySet()) {
            String name = ns.getKey();
            String value = ns.getValue();
            if (schemaElement.getAttributeNodeNS("http://www.w3.org/2000/xmlns/", name) == null) {
                schemaElement.setAttributeNS("http://www.w3.org/2000/xmlns/", "xmlns:" + name, value);
            }
        }

        // map schemas by their target namespace
        schema.appendChild(schemaElement);
        DOMSource domSource = new DOMSource(schema);
        sources.put(targetNs, domSource);
    }

    SchemaFactory factory =
        SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);

    // Create a ResourceResolver that can find the correct schema from the map
    DOMImplementationRegistry registry = DOMImplementationRegistry.newInstance();

    final DOMImplementationLS domImplementationLS = (DOMImplementationLS) registry.getDOMImplementation("LS");
    factory.setResourceResolver(new LSResourceResolver() {
        @Override public LSInput resolveResource(String type, String namespaceURI, String publicId, String systemId, String baseURI) {
            Source xmlSource = sources.get(namespaceURI);
            if (xmlSource != null) {
                LSInput input = domImplementationLS.createLSInput();
                ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
                Result outputTarget = new StreamResult(outputStream);
                try {
                    TransformerFactory.newInstance().newTransformer().transform(xmlSource, outputTarget);
                } catch (TransformerException e) {
                    e.printStackTrace();
                }
                InputStream is = new ByteArrayInputStream(outputStream.toByteArray());
                input.setByteStream(is);
                input.setSystemId(systemId);
                return input;
            } else {
                return null;
            }
        }
    });

    // create the schema object from the sources
    return factory.newSchema(sources.values().toArray(new DOMSource[]{}));
}