samples/ui/DOMParserSaveEncoding.java

/*
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 1999,2000,2001 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.
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 * 4. The names "Xerces" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
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 * 5. Products derived from this software may not be called "Apache",
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 * 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 ui;
import org.xml.sax.InputSource;
import org.w3c.dom.Attr;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.apache.xerces.util.EncodingMap;
import org.apache.xerces.parsers.DOMParser;
import org.apache.xerces.xni.XNIException;

/**
 *  The DOMParserSaveEncoding class extends DOMParser. It also provides
 *  the Java Encoding of the XML document by overriding the startDocument method 
 *  and providing a way to capture the MIME encoding from the XML document which
 *  in turn is converted to the Java Encoding by the internal MIME2Java class.
 *   
 */


public class DOMParserSaveEncoding extends DOMParser {
    String _mimeEncoding = "UTF8";//Default  MIME so we check the file.encoding
    private void setMimeEncoding( String encoding ) {
        _mimeEncoding = encoding;
    }
    private String getMimeEncoding() {
        return(_mimeEncoding);
    }
    public String getJavaEncoding() {
        String javaEncoding = null;
        String mimeEncoding = getMimeEncoding();

        if (mimeEncoding != null) {
            if (mimeEncoding.equals( "DEFAULT" ))
                javaEncoding =  "UTF8";
            else if (mimeEncoding.equalsIgnoreCase( "UTF-16" ))
                javaEncoding = "Unicode";
            else
                javaEncoding = EncodingMap.getIANA2JavaMapping( mimeEncoding );    
        } else   // Should never return null
            javaEncoding = "UTF8";
        return(javaEncoding);
    }
    public void startEntity(String name, 
                            String publicId, String systemId, 
                            String baseSystemId,
                            String encoding) throws XNIException {
        if( encoding != null){
            setMimeEncoding( encoding);
        }
        super.startEntity(name, publicId, systemId, baseSystemId, encoding);
    }

}