protected DocumentBuilder createDocumentBuilder(DocumentBuilderFactory factory,
    EntityResolver entityResolver,
    ErrorHandler errorHandler) throws ParserConfigurationException 
{
		DocumentBuilder docBuilder = factory.newDocumentBuilder();
		if (entityResolver != null) {
			docBuilder.setEntityResolver(entityResolver);
		}
		if (errorHandler != null) {
			docBuilder.setErrorHandler(errorHandler);
		}
		return docBuilder;
}

Create a JAXP DocumentBuilder that this bean definition reader will use for parsing XML documents. Can be overridden in subclasses, adding further initialization of the builder.

 protected DocumentBuilderFactory createDocumentBuilderFactory(int validationMode,
    boolean namespaceAware) throws ParserConfigurationException 
{
		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
		factory.setNamespaceAware(namespaceAware);
		if (validationMode != XmlValidationModeDetector.VALIDATION_NONE) {
			factory.setValidating(true);
			if (validationMode == XmlValidationModeDetector.VALIDATION_XSD) {
				// Enforce namespace aware for XSD...
				factory.setNamespaceAware(true);
				try {
					factory.setAttribute(SCHEMA_LANGUAGE_ATTRIBUTE, XSD_SCHEMA_LANGUAGE);
				}
				catch (IllegalArgumentException ex) {
					ParserConfigurationException pcex = new ParserConfigurationException(
							"Unable to validate using XSD: Your JAXP provider [" + factory +
							"] does not support XML Schema. Are you running on Java 1.4 with Apache Crimson? " +
							"Upgrade to Apache Xerces (or Java 1.5) for full XSD support.");
					pcex.initCause(ex);
					throw pcex;
				}
			}
		}
		return factory;
}

Create the DocumentBuilderFactory instance.

 public Document loadDocument(InputSource inputSource,
    EntityResolver entityResolver,
    ErrorHandler errorHandler,
    int validationMode,
    boolean namespaceAware) throws Exception 
{
	               	 
		DocumentBuilderFactory factory = createDocumentBuilderFactory(validationMode, namespaceAware);
		if (logger.isDebugEnabled()) {
			logger.debug("Using JAXP provider [" + factory.getClass().getName() + "]");
		}
		DocumentBuilder builder = createDocumentBuilder(factory, entityResolver, errorHandler);
		return builder.parse(inputSource);
}

Load the Document at the supplied InputSource using the standard JAXP-configured XML parser.