Java Architecture for XML Binding (JAXB) is a Java API that allows Java developers to map Java classes to XML representations.

jaxb-api-2.2.12.jar is the JAR file for the JAXB API 2.2 specification. You can download and use it directly without any building process as shown in the last tutorial.

If you want to rebuild the JAR file, you can download the source code at JAXB API Maven Website.

You can also browse the source code below:

⏎ javax/xml/bind/ValidationEvent.java

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2003-2013 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * http://glassfish.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
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 */

package javax.xml.bind;

/**
 * This event indicates that a problem was encountered while validating the    
 * incoming XML data during an unmarshal operation, while performing 
 * on-demand validation of the Java content tree, or while marshalling the
 * Java content tree back to XML data.
 * 
 * @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 ValidationEventHandler
 * @since 1.6, JAXB 1.0
 */
public interface ValidationEvent {
    
    /** 
     * Conditions that are not errors or fatal errors as defined by the 
     * XML 1.0 recommendation 
     */
    public static final int WARNING     = 0;
    
    /**
     * Conditions that correspond to the definition of "error" in section 
     * 1.2 of the W3C XML 1.0 Recommendation
     */
    public static final int ERROR       = 1;
    
    /**
     * Conditions that correspond to the definition of "fatal error" in section 
     * 1.2 of the W3C XML 1.0 Recommendation
     */
    public static final int FATAL_ERROR = 2;

    /**
     * Retrieve the severity code for this warning/error. 
     *
     * <p>
     * Must be one of <tt>ValidationError.WARNING</tt>, 
     * <tt>ValidationError.ERROR</tt>, or <tt>ValidationError.FATAL_ERROR</tt>.
     *
     * @return the severity code for this warning/error
     */
    public int getSeverity();
    
    /**
     * Retrieve the text message for this warning/error.
     *
     * @return the text message for this warning/error or null if one wasn't set
     */
    public String getMessage();
    
    /**
     * Retrieve the linked exception for this warning/error.
     *
     * @return the linked exception for this warning/error or null if one
     *         wasn't set
     */
    public Throwable getLinkedException();
    
    /**
     * Retrieve the locator for this warning/error.
     *
     * @return the locator that indicates where the warning/error occurred
     */
    public ValidationEventLocator getLocator();
    
}

⏎ javax/xml/bind/ValidationEvent.java

Or download all of them as a single archive file:

File name: jaxb-api-2.2.12-sources.jar
File size: 245023 bytes
Release date: 2014-10-10
Download 

⇒ Download jaxb-api-2.2.12.jar File

⇐ Download JAXB 2.2 Specification and API JAR

⇑ JAXB (Java Architecture for XML Binding) API Specification

⇑⇑ FAQ for jaxb-*.jar - Java Architecture for XML Binding