/*
 * 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
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 *
 * 5. Products derived from this software may not be called "Apache",
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 *
 * 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
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 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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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 dom;

import org.w3c.dom.Document;
import org.w3c.dom.Text;

import org.xml.sax.SAXNotRecognizedException;
import org.xml.sax.SAXNotSupportedException;

/**
 * Encapsulates a DOM parser.
 *
 * @version $Id: ParserWrapper.java,v 1.3 2002/01/29 01:15:05 lehors Exp $
 */
public interface ParserWrapper {

    //
    // ParserWrapper methods
    //

    /** Parses the specified URI and returns the document. */
    public Document parse(String uri) throws Exception;

    /**
     * Set the state of a feature.
     *
     * Set the state of any feature in a SAX2 parser.  The parser
     * might not recognize the feature, and if it does recognize
     * it, it might not be able to fulfill the request.
     *
     * @param featureId The unique identifier (URI) of the feature.
     * @param state The requested state of the feature (true or false).
     *
     * @exception org.xml.sax.SAXNotRecognizedException If the
     *            requested feature is not known.
     * @exception org.xml.sax.SAXNotSupportedException If the
     *            requested feature is known, but the requested
     *            state is not supported.
     * @exception org.xml.sax.SAXException If there is any other
     *            problem fulfilling the request.
     */
    public void setFeature(String featureId, boolean state)
        throws  SAXNotRecognizedException, SAXNotSupportedException; 

    /** Returns the document information. */
    public DocumentInfo getDocumentInfo();

    //
    // Interfaces
    //

    /**
     * This interface is here to query information about the document
     * implementation returned by the <code>ParserWrapper#parse</code>
     * method.
     *
     * @author Andy Clark, IBM
     */
    public interface DocumentInfo {

        //
        // DocumentInfo methods
        //

        /** 
         * Returns true if the specified text node is ignorable whitespace. 
         */
        public boolean isIgnorableWhitespace(Text text);

    } // interface DocumentInfo

} // interface ParserWrapper