src/org/apache/xerces/xni/parser/XMLDocumentScanner.java

/*
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 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 org.apache.xerces.xni.parser;

import java.io.IOException;
import org.apache.xerces.xni.XNIException;

/**
 * This interface defines a generic document scanner. This interface
 * allows a scanner to be used interchangably in existing parser
 * configurations.
 * <p>
 * If the parser configuration uses a document scanner that implements
 * this interface, components should be able to query the scanner
 * instance from the component manager using the following property 
 * identifier:
 * <blockquote>
 *  "http://apache.org/xml/properties/internal/document-scanner"
 * </blockquote>
 *
 * @author Andy Clark, IBM
 *
 * @version $Id$
 */
public interface XMLDocumentScanner 
    extends XMLDocumentSource {

    //
    // XMLDocumentScanner methods
    //

    /** 
     * Sets the input source. 
     *
     * @param inputSource The input source.
     *
     * @throws IOException Thrown on i/o error.
     */
    public void setInputSource(XMLInputSource inputSource) throws IOException;

    /** 
     * Scans a document.
     *
     * @param complete True if the scanner should scan the document
     *                 completely, pushing all events to the registered
     *                 document handler. A value of false indicates that
     *                 that the scanner should only scan the next portion
     *                 of the document and return. A scanner instance is
     *                 permitted to completely scan a document if it does
     *                 not support this "pull" scanning model.
     *
     * @returns True if there is more to scan, false otherwise.
     */
    public boolean scanDocument(boolean complete)
        throws IOException, XNIException;

} // interface XMLDocumentScanner