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 * Copyright (c) 2004, 2019, 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

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 */

package org.xml.sax.ext;

import org.xml.sax.Locator;

/**

 * SAX2 extension to augment the entity information provided

 * through a {@link Locator}.

 * If an implementation supports this extension, the Locator

 * provided in {@link org.xml.sax.ContentHandler#setDocumentLocator

 * ContentHandler.setDocumentLocator() } will implement this

 * interface, and the

 * <em>http://xml.org/sax/features/use-locator2</em> feature

 * flag will have the value <em>true</em>.

 *

 * <p> XMLReader implementations are not required to support this

 * information, and it is not part of core-only SAX2 distributions.</p>

 *

 * @since 1.5, SAX 2.0 (extensions 1.1 alpha)

 * @author David Brownell

 */

public interface Locator2 extends Locator

{

    /**

     * Returns the version of XML used for the entity.  This will

     * normally be the identifier from the current entity's

     * <em>&lt;?xml&nbsp;version='...'&nbsp;...?&gt;</em> declaration,

     * or be defaulted by the parser.

     *

     * @return Identifier for the XML version being used to interpret

     * the entity's text, or null if that information is not yet

     * available in the current parsing state.

     */

    public String getXMLVersion ();

    /**

     * Returns the name of the character encoding for the entity.

     * If the encoding was declared externally (for example, in a MIME

     * Content-Type header), that will be the name returned.  Else if there

     * was an <em>&lt;?xml&nbsp;...encoding='...'?&gt;</em> declaration at

     * the start of the document, that encoding name will be returned.

     * Otherwise the encoding will been inferred (normally to be UTF-8, or

     * some UTF-16 variant), and that inferred name will be returned.

     *

     * <p>When an {@link org.xml.sax.InputSource InputSource} is used

     * to provide an entity's character stream, this method returns the

     * encoding provided in that input stream.

     *

     * <p> Note that some recent W3C specifications require that text

     * in some encodings be normalized, using Unicode Normalization

     * Form C, before processing.  Such normalization must be performed

     * by applications, and would normally be triggered based on the

     * value returned by this method.

     *

     * <p> Encoding names may be those used by the underlying JVM,

     * and comparisons should be case-insensitive.

     *

     * @return Name of the character encoding being used to interpret

     * * the entity's text, or null if this was not provided for a *

     * character stream passed through an InputSource or is otherwise

     * not yet available in the current parsing state.

     */

    public String getEncoding ();

}