/*
 * Copyright (c) 2005, 2006, 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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 * questions.
 */

package javax.xml.bind;

/**
 * Encapsulate the location of a ValidationEvent.
 *
 * <p>
 * The <tt>ValidationEventLocator</tt> indicates where the <tt>ValidationEvent
 * </tt> occurred.  Different fields will be set depending on the type of 
 * validation that was being performed when the error or warning was detected.  
 * For example, on-demand validation would produce locators that contained 
 * references to objects in the Java content tree while unmarshal-time 
 * validation would produce locators containing information appropriate to the 
 * source of the XML data (file, url, Node, etc).
 *
 * @author <ul><li>Ryan Shoemaker, Sun Microsystems, Inc.</li><li>Kohsuke Kawaguchi, Sun Microsystems, Inc.</li><li>Joe Fialli, Sun Microsystems, Inc.</li></ul> 
 * @see Validator
 * @see ValidationEvent
 * @since JAXB1.0
 */
public interface ValidationEventLocator {

    /**
     * Return the name of the XML source as a URL if available
     *
     * @return the name of the XML source as a URL or null if unavailable
     */
    public java.net.URL getURL();
    
    /**
     * Return the byte offset if available
     *
     * @return the byte offset into the input source or -1 if unavailable
     */
    public int getOffset();
    
    /**
     * Return the line number if available
     *
     * @return the line number or -1 if unavailable 
     */
    public int getLineNumber();
    
    /**
     * Return the column number if available
     *
     * @return the column number or -1 if unavailable
     */
    public int getColumnNumber();
    
    /**
     * Return a reference to the object in the Java content tree if available
     *
     * @return a reference to the object in the Java content tree or null if
     *         unavailable
     */
    public java.lang.Object getObject();
    
    /**
     * Return a reference to the DOM Node if available
     *
     * @return a reference to the DOM Node or null if unavailable 
     */
    public org.w3c.dom.Node getNode();
    
}
