import com.sun.org.apache.xerces.internal.parsers.DOMParserImpl; //导入依赖的package包/类
/**
    * DOM Level 3 LS CR - Experimental.
* Create a new <code>LSParser</code>. The newly constructed parser may
* then be configured by means of its <code>DOMConfiguration</code>
* object, and used to parse documents by means of its <code>parse</code>
*  method.
* @param mode  The <code>mode</code> argument is either
*   <code>MODE_SYNCHRONOUS</code> or <code>MODE_ASYNCHRONOUS</code>, if
*   <code>mode</code> is <code>MODE_SYNCHRONOUS</code> then the
*   <code>LSParser</code> that is created will operate in synchronous
*   mode, if it's <code>MODE_ASYNCHRONOUS</code> then the
*   <code>LSParser</code> that is created will operate in asynchronous
*   mode.
* @param schemaType  An absolute URI representing the type of the schema
*   language used during the load of a <code>Document</code> using the
*   newly created <code>LSParser</code>. Note that no lexical checking
*   is done on the absolute URI. In order to create a
*   <code>LSParser</code> for any kind of schema types (i.e. the
*   LSParser will be free to use any schema found), use the value
*   <code>null</code>.
* <p ><b>Note:</b>    For W3C XML Schema [<a href='http://www.w3.org/TR/2001/REC-xmlschema-1-20010502/'>XML Schema Part 1</a>]
*   , applications must use the value
*   <code>"http://www.w3.org/2001/XMLSchema"</code>. For XML DTD [<a href='http://www.w3.org/TR/2000/REC-xml-20001006'>XML 1.0</a>],
*   applications must use the value
*   <code>"http://www.w3.org/TR/REC-xml"</code>. Other Schema languages
*   are outside the scope of the W3C and therefore should recommend an
*   absolute URI in order to use this method.
* @return  The newly created <code>LSParser</code> object. This
*   <code>LSParser</code> is either synchronous or asynchronous
*   depending on the value of the <code>mode</code> argument.
* <p ><b>Note:</b>    By default, the newly created <code>LSParser</code>
*    does not contain a <code>DOMErrorHandler</code>, i.e. the value of
*   the "<a href='http://www.w3.org/TR/2003/WD-DOM-Level-3-Core-20030609/core.html#parameter-error-handler'>
*   error-handler</a>" configuration parameter is <code>null</code>. However, implementations
*   may provide a default error handler at creation time. In that case,
*   the initial value of the <code>"error-handler"</code> configuration
*   parameter on the new created <code>LSParser</code> contains a
*   reference to the default error handler.
* @exception DOMException
*    NOT_SUPPORTED_ERR: Raised if the requested mode or schema type is
*   not supported.
    */
   public LSParser createLSParser(short mode, String schemaType)
           throws DOMException {
           if (mode != DOMImplementationLS.MODE_SYNCHRONOUS || (schemaType !=null &&
              !"http://www.w3.org/2001/XMLSchema".equals(schemaType) &&
                   !"http://www.w3.org/TR/REC-xml".equals(schemaType))) {
                   String msg =
                           DOMMessageFormatter.formatMessage(
                                   DOMMessageFormatter.DOM_DOMAIN,
                                   "NOT_SUPPORTED_ERR",
                                   null);
                   throw new DOMException(DOMException.NOT_SUPPORTED_ERR, msg);
           }
           if (schemaType != null
                   && schemaType.equals("http://www.w3.org/TR/REC-xml")) {
                   return new DOMParserImpl(new DTDConfiguration(),
                           schemaType);
           }
           else {
                   // create default parser configuration validating against XMLSchemas
                   return new DOMParserImpl(new XIncludeAwareParserConfiguration(),
                           schemaType);
           }
   }