/*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 1999-2002 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Xerces" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation and was
* originally based on software copyright (c) 1999, International
* Business Machines, Inc., http://www.apache.org. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.xerces.dom;
import org.w3c.dom.DOMException;
import org.w3c.dom.DOMImplementation;
import org.w3c.dom.Document;
import org.w3c.dom.DocumentType;
import org.w3c.dom.Element;
// DOM L3 LS
import org.w3c.dom.ls.DOMImplementationLS;
import org.w3c.dom.ls.DOMBuilder;
import org.w3c.dom.ls.DOMWriter;
import org.w3c.dom.ls.DOMInputSource;
import org.apache.xerces.parsers.DOMBuilderImpl;
import org.apache.xml.serialize.DOMWriterImpl;
// DOM Revalidation
import org.apache.xerces.impl.RevalidationHandler;
/**
* The DOMImplementation class is description of a particular
* implementation of the Document Object Model. As such its data is
* static, shared by all instances of this implementation.
* <P>
* The DOM API requires that it be a real object rather than static
* methods. However, there's nothing that says it can't be a singleton,
* so that's how I've implemented it.
* <P>
* This particular class, along with CoreDocumentImpl, supports the DOM
* Core and Load/Save (Experimental). Optional modules are supported by
* the more complete DOMImplementation class along with DocumentImpl.
* @version $Id: CoreDOMImplementationImpl.java,v 1.16 2002/07/25 19:16:11 elena Exp $
* @since PR-DOM-Level-1-19980818.
*/
public class CoreDOMImplementationImpl
implements DOMImplementation, DOMImplementationLS {
//
// Data
//
RevalidationHandler fDOMRevalidator = null;
boolean free = true;
// static
/** Dom implementation singleton. */
static CoreDOMImplementationImpl singleton = new CoreDOMImplementationImpl();
//
// Public methods
//
/** NON-DOM: Obtain and return the single shared object */
public static DOMImplementation getDOMImplementation() {
return singleton;
}
//
// DOMImplementation methods
//
/**
* Test if the DOM implementation supports a specific "feature" --
* currently meaning language and level thereof.
*
* @param feature The package name of the feature to test.
* In Level 1, supported values are "HTML" and "XML" (case-insensitive).
* At this writing, org.apache.xerces.dom supports only XML.
*
* @param version The version number of the feature being tested.
* This is interpreted as "Version of the DOM API supported for the
* specified Feature", and in Level 1 should be "1.0"
*
* @returns true iff this implementation is compatable with the
* specified feature and version.
*/
public boolean hasFeature(String feature, String version) {
// Currently, we support only XML Level 1 version 1.0
boolean anyVersion = version == null || version.length() == 0;
return
(feature.equalsIgnoreCase("Core")
&& (anyVersion
|| version.equals("1.0")
|| version.equals("2.0")))
|| (feature.equalsIgnoreCase("XML")
&& (anyVersion
|| version.equals("1.0")
|| version.equals("2.0")))
|| (feature.equalsIgnoreCase("LS-Load")
&& (anyVersion
|| version.equals("3.0")));
} // hasFeature(String,String):boolean
/**
* Introduced in DOM Level 2. <p>
*
* Creates an empty DocumentType node.
*
* @param qualifiedName The qualified name of the document type to be created.
* @param publicID The document type public identifier.
* @param systemID The document type system identifier.
* @since WD-DOM-Level-2-19990923
*/
public DocumentType createDocumentType(String qualifiedName,
String publicID,
String systemID)
{
if (!CoreDocumentImpl.isXMLName(qualifiedName)) {
String msg = DOMMessageFormatter.formatMessage(DOMMessageFormatter.DOM_DOMAIN, "INVALID_CHARACTER_ERR", null);
throw new DOMException(DOMException.INVALID_CHARACTER_ERR, msg);
}
int index = qualifiedName.indexOf(':');
int lastIndex = qualifiedName.lastIndexOf(':');
// it is an error for NCName to have more than one ':'
if (index == 0 || index == qualifiedName.length() - 1 || lastIndex!=index) {
String msg = DOMMessageFormatter.formatMessage(DOMMessageFormatter.DOM_DOMAIN, "NAMESPACE_ERR", null);
throw new DOMException(DOMException.NAMESPACE_ERR, msg);
}
return new DocumentTypeImpl(null, qualifiedName, publicID, systemID);
}
/**
* Introduced in DOM Level 2. <p>
*
* Creates an XML Document object of the specified type with its document
* element.
*
* @param namespaceURI The namespace URI of the document
* element to create, or null.
* @param qualifiedName The qualified name of the document
* element to create.
* @param doctype The type of document to be created or null.<p>
*
* 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.
* This method makes available a <code>DOMImplementation</code>'s
* specialized interface (see ).
* @param feature The name of the feature requested (case-insensitive).
* @return Returns an alternate <code>DOMImplementation</code> which
* implements the specialized APIs of the specified feature, if any,
* or <code>null</code> if there is no alternate
* <code>DOMImplementation</code> object which implements interfaces
* associated with that feature. Any alternate
* <code>DOMImplementation</code> returned by this method must
* delegate to the primary core <code>DOMImplementation</code> and not
* return results inconsistent with the primary
* <code>DOMImplementation</code>
*/
public DOMImplementation getInterface(String feature){
String msg = DOMMessageFormatter.formatMessage(DOMMessageFormatter.DOM_DOMAIN, "NOT_SUPPORTED_ERR", null);
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, msg);
}
// DOM L3 LS
/**
* DOM Level 3 WD - Experimental.
*/
public DOMBuilder createDOMBuilder(short mode,
String schemaType)
throws DOMException{
if (mode == DOMImplementationLS.MODE_ASYNCHRONOUS) {
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 DOMBuilderImpl("org.apache.xerces.parsers.DTDConfiguration", schemaType);
} else {
// create default parser configuration validating against XMLSchemas
return new DOMBuilderImpl("org.apache.xerces.parsers.StandardParserConfiguration", schemaType);
}
}
/**
* DOM Level 3 WD - Experimental.
*/
public DOMWriter createDOMWriter() {
return new DOMWriterImpl(true);
}
/**
* DOM Level 3 WD - Experimental.
*/
public DOMInputSource createDOMInputSource() {
return new DOMInputSourceImpl();
}
//
// Protected methods
//
/** NON-DOM */
synchronized RevalidationHandler getValidator (String schemaType){
// REVISIT: implement a pool of validators to avoid long
// waiting for several threads
// implement retrieving grammar based on schemaType
if (fDOMRevalidator == null) {
try {
fDOMRevalidator = (RevalidationHandler) (Class.forName("org.apache.xerces.impl.xs.XMLSchemaValidator")).newInstance();
} catch (ClassNotFoundException ex){
// will happen if this is DTD Only build
} catch (Exception e){
}
}
while (!isFree()) {
try {
wait();
}
catch (InterruptedException e){
try {
return (RevalidationHandler) (Class.forName("org.apache.xerces.impl.xs.XMLSchemaValidator")).newInstance();
} catch (ClassNotFoundException ex){
// will happen if this is DTD Only build
return null;
} catch (Exception exception){
return null;
}
}
}
free = false;
return fDOMRevalidator;
}
/** NON-DOM */
synchronized void releaseValidator(String schemaType){
// REVISIT: implement releasing grammar base on the schema type
notifyAll();
free = true;
}
/** NON-DOM */
final synchronized boolean isFree(){
return free;
}
} // class DOMImplementationImpl