/*

 * Copyright (c) 2000, 2005, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

// SAX parser interface.

// http://www.saxproject.org

// No warranty; no copyright -- use this as you will.

// $Id: Parser.java,v 1.2 2004/11/03 22:55:32 jsuttor Exp $

package org.xml.sax;

import java.io.IOException;

import java.util.Locale;

/**

 * Basic interface for SAX (Simple API for XML) parsers.

 *

 * <blockquote>

 * <em>This module, both source code and documentation, is in the

 * Public Domain, and comes with <strong>NO WARRANTY</strong>.</em>

 * See <a href='http://www.saxproject.org'>http://www.saxproject.org</a>

 * for further information.

 * </blockquote>

 *

 * <p>This was the main event supplier interface for SAX1; it has

 * been replaced in SAX2 by {@link org.xml.sax.XMLReader XMLReader},

 * which includes Namespace support and sophisticated configurability

 * and extensibility.</p>

 *

 * <p>All SAX1 parsers must implement this basic interface: it allows

 * applications to register handlers for different types of events

 * and to initiate a parse from a URI, or a character stream.</p>

 *

 * <p>All SAX1 parsers must also implement a zero-argument constructor

 * (though other constructors are also allowed).</p>

 *

 * <p>SAX1 parsers are reusable but not re-entrant: the application

 * may reuse a parser object (possibly with a different input source)

 * once the first parse has completed successfully, but it may not

 * invoke the parse() methods recursively within a parse.</p>

 *

 * @deprecated This interface has been replaced by the SAX2

 *             {@link org.xml.sax.XMLReader XMLReader}

 *             interface, which includes Namespace support.

 * @author David Megginson

 * @see org.xml.sax.EntityResolver

 * @see org.xml.sax.DTDHandler

 * @see org.xml.sax.DocumentHandler

 * @see org.xml.sax.ErrorHandler

 * @see org.xml.sax.HandlerBase

 * @see org.xml.sax.InputSource

 */

public interface Parser

{

    /**

     * Allow an application to request a locale for errors and warnings.

     *

     * <p>SAX parsers are not required to provide localisation for errors

     * and warnings; if they cannot support the requested locale,

     * however, they must throw a SAX exception.  Applications may

     * not request a locale change in the middle of a parse.</p>

     *

     * @param locale A Java Locale object.

     * @exception org.xml.sax.SAXException Throws an exception

     *            (using the previous or default locale) if the

     *            requested locale is not supported.

     * @see org.xml.sax.SAXException

     * @see org.xml.sax.SAXParseException

     */

    public abstract void setLocale (Locale locale)

        throws SAXException;

    /**

     * Allow an application to register a custom entity resolver.

     *

     * <p>If the application does not register an entity resolver, the

     * SAX parser will resolve system identifiers and open connections

     * to entities itself (this is the default behaviour implemented in

     * HandlerBase).</p>

     *

     * <p>Applications may register a new or different entity resolver

     * in the middle of a parse, and the SAX parser must begin using

     * the new resolver immediately.</p>

     *

     * @param resolver The object for resolving entities.

     * @see EntityResolver

     * @see HandlerBase

     */

    public abstract void setEntityResolver (EntityResolver resolver);

    /**

     * Allow an application to register a DTD event handler.

     *

     * <p>If the application does not register a DTD handler, all DTD

     * events reported by the SAX parser will be silently

     * ignored (this is the default behaviour implemented by

     * HandlerBase).</p>

     *

     * <p>Applications may register a new or different

     * handler in the middle of a parse, and the SAX parser must

     * begin using the new handler immediately.</p>

     *

     * @param handler The DTD handler.

     * @see DTDHandler

     * @see HandlerBase

     */

    public abstract void setDTDHandler (DTDHandler handler);

    /**

     * Allow an application to register a document event handler.

     *

     * <p>If the application does not register a document handler, all

     * document events reported by the SAX parser will be silently

     * ignored (this is the default behaviour implemented by

     * HandlerBase).</p>

     *

     * <p>Applications may register a new or different handler in the

     * middle of a parse, and the SAX parser must begin using the new

     * handler immediately.</p>

     *

     * @param handler The document handler.

     * @see DocumentHandler

     * @see HandlerBase

     */

    public abstract void setDocumentHandler (DocumentHandler handler);

    /**

     * Allow an application to register an error event handler.

     *

     * <p>If the application does not register an error event handler,

     * all error events reported by the SAX parser will be silently

     * ignored, except for fatalError, which will throw a SAXException

     * (this is the default behaviour implemented by HandlerBase).</p>

     *

     * <p>Applications may register a new or different handler in the

     * middle of a parse, and the SAX parser must begin using the new

     * handler immediately.</p>

     *

     * @param handler The error handler.

     * @see ErrorHandler

     * @see SAXException

     * @see HandlerBase

     */

    public abstract void setErrorHandler (ErrorHandler handler);

    /**

     * Parse an XML document.

     *

     * <p>The application can use this method to instruct the SAX parser

     * to begin parsing an XML document from any valid input

     * source (a character stream, a byte stream, or a URI).</p>

     *

     * <p>Applications may not invoke this method while a parse is in

     * progress (they should create a new Parser instead for each

     * additional XML document).  Once a parse is complete, an

     * application may reuse the same Parser object, possibly with a

     * different input source.</p>

     *

     * @param source The input source for the top-level of the

     *        XML document.

     * @exception org.xml.sax.SAXException Any SAX exception, possibly

     *            wrapping another exception.

     * @exception java.io.IOException An IO exception from the parser,

     *            possibly from a byte stream or character stream

     *            supplied by the application.

     * @see org.xml.sax.InputSource

     * @see #parse(java.lang.String)

     * @see #setEntityResolver

     * @see #setDTDHandler

     * @see #setDocumentHandler

     * @see #setErrorHandler

     */

    public abstract void parse (InputSource source)

        throws SAXException, IOException;

    /**

     * Parse an XML document from a system identifier (URI).

     *

     * <p>This method is a shortcut for the common case of reading a

     * document from a system identifier.  It is the exact

     * equivalent of the following:</p>

     *

     * <pre>

     * parse(new InputSource(systemId));

     * </pre>

     *

     * <p>If the system identifier is a URL, it must be fully resolved

     * by the application before it is passed to the parser.</p>

     *

     * @param systemId The system identifier (URI).

     * @exception org.xml.sax.SAXException Any SAX exception, possibly

     *            wrapping another exception.

     * @exception java.io.IOException An IO exception from the parser,

     *            possibly from a byte stream or character stream

     *            supplied by the application.

     * @see #parse(org.xml.sax.InputSource)

     */

    public abstract void parse (String systemId)

        throws SAXException, IOException;

}

// end of Parser.java