Question

是否可以通过SAX读取给定XML中<xsd:appinfo>标记中存储的值。目前我正在使用DefaultHandler类的自定义实现来读取XML中的元素和值。我现在需要阅读存储在<xsd:appinfo>标记中的其他信息。

我正在尝试针对XSD架构验证XML。我使用SAX来使用下面的代码验证架构

SAXParserFactory factory = SAXParserFactory.newInstance();
        factory.setValidating(false);
        factory.setNamespaceAware(true);

        SchemaFactory schemaFactory = SchemaFactory
                .newInstance("http://www.w3.org/2001/XMLSchema");
        SAXParser parser = null;
        try {
            factory.setSchema(schemaFactory
                    .newSchema(new Source[] { new StreamSource(xsd) }));
            parser = factory.newSAXParser();
        } catch (SAXException se) {
            System.out.println("SCHEMA : " + se.getMessage()); // problem in
                                                                // the XSD
                                                                // itself
            isInvalid=true;
        }

        XMLReader reader = parser.getXMLReader();
        final MyContentHandler xpathTracker = new MyContentHandler();

        reader.setContentHandler(xpathTracker);
        reader.setErrorHandler(new ErrorHandler() {
            public void warning(SAXParseException e) throws SAXException {
                System.out.println("WARNING: " + e.getMessage());
                                      // do nothing
            }

            public void error(SAXParseException e) throws SAXException {                    
                xpathError.add(xpathTracker.getXPath());
            }

我有ContentHandler的以下代码

public class MyContentHandler extends XMLFilterImpl {

private final Stack<StackElement> stackElements = new Stack<StackElement>();

public MyContentHandler() {
    super();
}

public MyContentHandler(XMLReader parent) {
    super(parent);
}

public MyContentHandler(ContentHandler contentHandler) {
    setContentHandler(contentHandler);
}

public void startDocument() throws SAXException {
    super.startDocument();
    stackElements.clear();   
    stackElements.push(new StackElement());
}

public void startElement(String uri, String localName, String qName, Attributes atts) throws SAXException {
    super.startElement(uri, localName, qName, atts); 
    //add new element to stack
     stackElements.push(new StackElement());        
     stackElements.peek().update(uri,localName,qName);

}


public void endElement(String uri, String localName, String qName) throws SAXException {
    super.endElement(uri, localName, qName);
    stackElements.pop();
}

public String getCurrentElement(){
     return stackElements.peek().getCurrent();
}

/**
 * Gets the XPath to the current element.
 */
public String getXPath() {
    StringBuilder buf = new StringBuilder();
    for (StackElement h : stackElements) {
        h.appendPath(buf);
    }
    return buf.toString();
}

}

这个想法是，如果任何元素的XSD验证失败，我需要报告该元素的完整XPATH。上面的代码和DefaultHandler就是这样做的。现在我的要求是，除了报告XPATH之外，它还应该打印出一个错误代码，该代码作为<xsd:appinfo>的一部分提供。下面是XSD的片段。

<xsd:element minOccurs="1" name="seqid" type="nonEmptyString">
        <xsd:annotation>
        <xsd:appinfo>ERROR_CODE="ERR_123</xsd:appinfo>
        </xsd:annotation>

SAX解析<xsd：appinfo>标记</xsd：appinfo>

0 个答案: