Example usage for javax.xml.transform.sax TransformerHandler startPrefixMapping

Introduction

In this page you can find the example usage for javax.xml.transform.sax TransformerHandler startPrefixMapping.

Prototype

public void startPrefixMapping(String prefix, String uri) throws SAXException;

Source Link

Document

Begin the scope of a prefix-URI Namespace mapping.

Usage

From source file:IOUtils.java

/**
 * Checks if the used Trax implementation correctly handles namespaces set using
 * <code>startPrefixMapping()</code>, but wants them also as 'xmlns:' attributes.
 * <p>//from  w ww .  jav a  2s.co m
 * The check consists in sending SAX events representing a minimal namespaced document
 * with namespaces defined only with calls to <code>startPrefixMapping</code> (no
 * xmlns:xxx attributes) and check if they are present in the resulting text.
 */
protected static boolean needsNamespacesAsAttributes(Properties format)
        throws TransformerException, SAXException {
    // Serialize a minimal document to check how namespaces are handled.
    final StringWriter writer = new StringWriter();

    final String uri = "namespaceuri";
    final String prefix = "nsp";
    final String check = "xmlns:" + prefix + "='" + uri + "'";

    final TransformerHandler handler = FACTORY.newTransformerHandler();

    handler.getTransformer().setOutputProperties(format);
    handler.setResult(new StreamResult(writer));

    // Output a single element
    handler.startDocument();
    handler.startPrefixMapping(prefix, uri);
    handler.startElement(uri, "element", "element", new AttributesImpl());
    handler.endElement(uri, "element", "element");
    handler.endPrefixMapping(prefix);
    handler.endDocument();

    final String text = writer.toString();

    // Check if the namespace is there (replace " by ' to be sure of what we search in)
    boolean needsIt = (text.replace('"', '\'').indexOf(check) == -1);

    return needsIt;
}

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From source file:org.apache.cocoon.components.source.impl.WebDAVSource.java

private InputStream resourcesToXml(WebdavResource[] resources) throws Exception {
    TransformerFactory tf = TransformerFactory.newInstance();
    TransformerHandler th = ((SAXTransformerFactory) tf).newTransformerHandler();
    ByteArrayOutputStream bOut = new ByteArrayOutputStream();
    StreamResult result = new StreamResult(bOut);
    th.setResult(result);//from  ww w .ja  v  a  2s.co  m
    th.startDocument();
    th.startPrefixMapping(PREFIX, NAMESPACE);
    th.startElement(NAMESPACE, COLLECTION_NAME, PREFIX + ":" + COLLECTION_NAME, XMLUtils.EMPTY_ATTRIBUTES);
    resourcesToSax(resources, th);
    th.endElement(NAMESPACE, COLLECTION_NAME, PREFIX + ":" + COLLECTION_NAME);
    th.endPrefixMapping(PREFIX);
    th.endDocument();

    return new ByteArrayInputStream(bOut.toByteArray());
}

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From source file:org.apache.cocoon.serialization.AbstractTextSerializer.java

/**
 * Checks if the used Trax implementation correctly handles namespaces set using
 * <code>startPrefixMapping()</code>, but wants them also as 'xmlns:' attributes.
 * <p>//w ww.  j av a  2 s.c o m
 * The check consists in sending SAX events representing a minimal namespaced document
 * with namespaces defined only with calls to <code>startPrefixMapping</code> (no
 * xmlns:xxx attributes) and check if they are present in the resulting text.
 */
protected boolean needsNamespacesAsAttributes() throws Exception {

    SAXTransformerFactory factory = getTransformerFactory();

    Boolean cacheValue = (Boolean) needsNamespaceCache.get(factory.getClass().getName());
    if (cacheValue != null) {
        return cacheValue.booleanValue();
    } else {
        // Serialize a minimal document to check how namespaces are handled.
        StringWriter writer = new StringWriter();

        String uri = "namespaceuri";
        String prefix = "nsp";
        String check = "xmlns:" + prefix + "='" + uri + "'";

        TransformerHandler handler = this.getTransformerHandler();

        handler.getTransformer().setOutputProperties(format);
        handler.setResult(new StreamResult(writer));

        // Output a single element
        handler.startDocument();
        handler.startPrefixMapping(prefix, uri);
        handler.startElement(uri, "element", "element", XMLUtils.EMPTY_ATTRIBUTES);
        handler.endElement(uri, "element", "element");
        handler.endPrefixMapping(prefix);
        handler.endDocument();

        String text = writer.toString();

        // Check if the namespace is there (replace " by ' to be sure of what we search in)
        boolean needsIt = (text.replace('"', '\'').indexOf(check) == -1);

        String msg = needsIt ? " needs namespace attributes (will be slower)."
                : " handles correctly namespaces.";

        getLogger().debug("Trax handler " + handler.getClass().getName() + msg);

        needsNamespaceCache.put(factory.getClass().getName(), BooleanUtils.toBooleanObject(needsIt));

        return needsIt;
    }
}

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