Examples with DOMReader com.helger.xml.serialize.read.DOMReader used on opensource projects

Example 1 with DOMReader

use of com.helger.xml.serialize.read.DOMReader in project ph-schematron by phax.

the class SchematronResourceHelper method getNodeOfSource.

/**
 * Convert the passed transform source into a DOM node. Currently on
 * {@link DOMSource} and {@link StreamSource} can be handled.
 *
 * @param aSource
 *        The transform source to use. May not be <code>null</code>.
 * @param aDRS
 *        DOMReader settings to use. May not be <code>null</code>.
 * @return The DOM node and never <code>null</code>.
 * @throws SAXException
 *         In case XML parsing fails
 * @throws IllegalArgumentException
 *         in case an unsupported {@link Source} implementation is provided.
 */
@Nullable
public static Node getNodeOfSource(@Nonnull final Source aSource, @Nonnull final DOMReaderSettings aDRS) throws SAXException {
    ValueEnforcer.notNull(aSource, "Source");
    ValueEnforcer.notNull(aDRS, "DOMReaderSettings");
    if (aSource instanceof DOMSource) {
        // Node is already in DOMSource
        return ((DOMSource) aSource).getNode();
    }
    if (aSource instanceof StreamSource) {
        // In StreamSource it can either be a byte stream or a character stream or
        // a system ID
        final StreamSource aStreamSource = (StreamSource) aSource;
        final InputStream aIS = aStreamSource.getInputStream();
        if (aIS != null) {
            // Byte stream
            final Document aDoc = DOMReader.readXMLDOM(aIS, aDRS != null ? aDRS : new DOMReaderSettings());
            if (aDoc == null)
                throw new IllegalArgumentException("Failed to read source " + aSource + " as XML from InputStream " + aIS);
            return aDoc;
        }
        final Reader aReader = aStreamSource.getReader();
        if (aReader != null) {
            // CHaracter stream
            final Document aDoc = DOMReader.readXMLDOM(aReader, aDRS);
            if (aDoc == null)
                throw new IllegalArgumentException("Failed to read source " + aSource + " as XML from Reader " + aReader);
            return aDoc;
        }
        final String sSystemID = aStreamSource.getSystemId();
        if (StringHelper.hasText(sSystemID)) {
            // System ID
            try {
                final URLResource aURL = new URLResource(sSystemID);
                final Document aDoc = DOMReader.readXMLDOM(aURL, aDRS);
                if (aDoc == null)
                    throw new IllegalArgumentException("Failed to read source " + aSource + " as XML from SystemID '" + sSystemID + "'");
                return aDoc;
            } catch (final MalformedURLException ex) {
                throw new IllegalArgumentException("Failed to read source " + aSource + " as XML from SystemID '" + sSystemID + "': " + ex.getMessage());
            }
        }
        // Neither InputStream nor Reader present
        s_aLogger.error("StreamSource contains neither InputStream nor Reader nor SystemID - cannot handle!");
        return null;
    }
    final String sMsg = "Can only handle DOMSource and StreamSource - having " + aSource + " with system ID '" + aSource.getSystemId() + "'";
    s_aLogger.error(sMsg);
    throw new IllegalArgumentException(sMsg);
}