coredomimplementationimpl.java

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	 *
	 *                         When doctype is not null, its
	 *                         Node.ownerDocument attribute is set to
	 *                         the document being created.
	 * @return Document        A new Document object.
	 * @throws DOMException    WRONG_DOCUMENT_ERR: Raised if doctype has
	 *                         already been used with a different document.
	 * @since WD-DOM-Level-2-19990923
	 */
	public Document createDocument(
		String namespaceURI,
		String qualifiedName,
		DocumentType doctype)
		throws DOMException {
		if (doctype != null && doctype.getOwnerDocument() != null) {
			String msg =
				DOMMessageFormatter.formatMessage(
					DOMMessageFormatter.DOM_DOMAIN,
					"WRONG_DOCUMENT_ERR",
					null);
			throw new DOMException(DOMException.WRONG_DOCUMENT_ERR, msg);
		}
		CoreDocumentImpl doc = new CoreDocumentImpl(doctype);
		Element e = doc.createElementNS(namespaceURI, qualifiedName);
		doc.appendChild(e);
		return doc;
	}

	/**
	 * DOM Level 3 WD - Experimental.
	 */
	public Object getFeature(String feature, String version) {
	    if (singleton.hasFeature(feature, version)) {
	        if ((feature.equalsIgnoreCase("+XPath"))) {
	            try {
	                Class xpathClass = ObjectFactory.findProviderClass(
	                    "com.sun.org.apache.xpath.internal.domapi.XPathEvaluatorImpl",
	                    ObjectFactory.findClassLoader(), true);
	                
	                // Check if the DOM XPath implementation implements
	                // the interface org.w3c.dom.XPathEvaluator
	                Class interfaces[] = xpathClass.getInterfaces();
	                for (int i = 0; i < interfaces.length; i++) {
	                    if (interfaces[i].getName().equals(
	                        "org.w3c.dom.xpath.XPathEvaluator")) {
	                        return xpathClass.newInstance();
	                    }
	                }
	            } catch (Exception e) {
	                return null;
	            }
	        } else {
	            return singleton;
	        }
	    }
	    return null;
	}

	// DOM L3 LS

	/**
	 * 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(
				"com.sun.org.apache.xerces.internal.parsers.DTDConfiguration",
				schemaType);
		}
		else {
			// create default parser configuration validating against XMLSchemas
			return new DOMParserImpl(
				"com.sun.org.apache.xerces.internal.parsers.XIncludeAwareParserConfiguration",
				schemaType);
		}
	}

	/**
	 * DOM Level 3 LS CR - Experimental.
         * Create a new <code>LSSerializer</code> object.
         * @return The newly created <code>LSSerializer</code> object.
         * <p ><b>Note:</b>    By default, the newly created
         * <code>LSSerializer</code> has no <code>DOMErrorHandler</code>,
         * i.e. the value of the <code>"error-handler"</code> 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>LSSerializer</code> contains a
         * reference to the default error handler.
	 */
	public LSSerializer createLSSerializer() {
        return new DOMSerializerImpl();
    } 
	/**
	 * DOM Level 3 LS CR - Experimental.
         * Create a new empty input source.
         * @return  The newly created input object.
	 */
	public LSInput createLSInput() {
		return new DOMInputImpl();
	}

	//
	// Protected methods
	//
	/** NON-DOM: retrieve validator. */
	synchronized RevalidationHandler getValidator(String schemaType) {
		// REVISIT: implement retrieving DTD validator
        if (schemaType == XMLGrammarDescription.XML_SCHEMA) {
            // create new validator - we should not attempt
            // to restrict the number of validation handlers being
            // requested
            if(freeValidatorIndex < 0) {
                return (RevalidationHandler) (ObjectFactory
                            .newInstance(
                                "com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator",
                                ObjectFactory.findClassLoader(),
                                true));
            }
            // return first available validator
            RevalidationHandler val = validators[freeValidatorIndex];
            validators[freeValidatorIndex--] = null;
            return val;
        }
        else if(schemaType == XMLGrammarDescription.XML_DTD) {
            if(freeDTDValidatorIndex < 0) {
                return (RevalidationHandler) (ObjectFactory
                            .newInstance(
                                "com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator",
                                ObjectFactory.findClassLoader(),
                                true));
            }
            // return first available validator
            RevalidationHandler val = dtdValidators[freeDTDValidatorIndex];
            dtdValidators[freeDTDValidatorIndex--] = null;
            return val;
        }
        return null;
	}

	/** NON-DOM: release validator */
	synchronized void releaseValidator(String schemaType,
                                         RevalidationHandler validator) {
       // REVISIT: implement support for DTD validators as well
       if(schemaType == XMLGrammarDescription.XML_SCHEMA) {
           ++freeValidatorIndex;
           if (validators.length == freeValidatorIndex ){
                // resize size of the validators
                currentSize+=SIZE;
                RevalidationHandler newarray[] =  new RevalidationHandler[currentSize];
                System.arraycopy(validators, 0, newarray, 0, validators.length);
                validators = newarray;
           }
           validators[freeValidatorIndex]=validator;
       }
       else if(schemaType == XMLGrammarDescription.XML_DTD) {
           ++freeDTDValidatorIndex;
           if (dtdValidators.length == freeDTDValidatorIndex ){
                // resize size of the validators
                currentSize+=SIZE;
                RevalidationHandler newarray[] =  new RevalidationHandler[currentSize];
                System.arraycopy(dtdValidators, 0, newarray, 0, dtdValidators.length);
                dtdValidators = newarray;
           }
           dtdValidators[freeDTDValidatorIndex]=validator;
       }
	}

       /** NON-DOM:  increment document/doctype counter */
       protected synchronized int assignDocumentNumber() {
            return ++docAndDoctypeCounter;
       }
       /** NON-DOM:  increment document/doctype counter */
       protected synchronized int assignDocTypeNumber() {
            return ++docAndDoctypeCounter;
       }

    /* DOM Level 3 LS CR - Experimental.
     *
     * Create a new empty output destination object where
     * <code>LSOutput.characterStream</code>,
     * <code>LSOutput.byteStream</code>, <code>LSOutput.systemId</code>,
     * <code>LSOutput.encoding</code> are null.

     * @return  The newly created output object.
     */
       public LSOutput createLSOutput() {
           return new DOMOutputImpl();
       }

} // class DOMImplementationImpl