/*
 * Copyright (c) 2003, 2018 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Distribution License v. 1.0, which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

package javax.xml.bind.util;

import javax.xml.bind.ValidationEvent;
import javax.xml.bind.ValidationEventHandler;
import java.util.ArrayList;
import java.util.List;

ValidationEventHandler implementation that collects all events. 

To use this class, create a new instance and pass it to the setEventHandler
method of the Validator, Unmarshaller, Marshaller class.  After the call to 
validate or unmarshal completes, call the getEvents method to retrieve all 
the reported errors and warnings.
Author:
Kohsuke Kawaguchi, Sun Microsystems, Inc.
Ryan Shoemaker, Sun Microsystems, Inc.
Joe Fialli, Sun Microsystems, Inc.
See Also:
Validator
ValidationEventHandler
ValidationEvent
ValidationEventLocator
Since:
1.6, JAXB 1.0/**
 * {@link javax.xml.bind.ValidationEventHandler ValidationEventHandler} 
 * implementation that collects all events.
 * 
 * <p>
 * To use this class, create a new instance and pass it to the setEventHandler
 * method of the Validator, Unmarshaller, Marshaller class.  After the call to 
 * validate or unmarshal completes, call the getEvents method to retrieve all 
 * the reported errors and warnings.
 *
 * @author <ul><li>Kohsuke Kawaguchi, Sun Microsystems, Inc.</li><li>Ryan Shoemaker, Sun Microsystems, Inc.</li><li>Joe Fialli, Sun Microsystems, Inc.</li></ul> 
 * @see javax.xml.bind.Validator
 * @see javax.xml.bind.ValidationEventHandler
 * @see javax.xml.bind.ValidationEvent
 * @see javax.xml.bind.ValidationEventLocator
 * @since 1.6, JAXB 1.0
 */
public class ValidationEventCollector implements ValidationEventHandler
{
    private final List<ValidationEvent> events = new ArrayList<ValidationEvent>();
     
    
Return an array of ValidationEvent objects containing a copy of each of 
the collected errors and warnings.
Returns:

     a copy of all the collected errors and warnings or an empty array
     if there weren't any/**
     * Return an array of ValidationEvent objects containing a copy of each of 
     * the collected errors and warnings.
     * 
     * @return
     *      a copy of all the collected errors and warnings or an empty array
     *      if there weren't any
     */
    public ValidationEvent[] getEvents() {
        return events.toArray(new ValidationEvent[events.size()]);
    }
    
    
Clear all collected errors and warnings.
/**
     * Clear all collected errors and warnings.
     */
    public void reset() {
        events.clear();
    }
    
    
Returns true if this event collector contains at least one 
ValidationEvent.
Returns:
true if this event collector contains at least one 
        ValidationEvent, false otherwise/**
     * Returns true if this event collector contains at least one 
     * ValidationEvent.
     *
     * @return true if this event collector contains at least one 
     *         ValidationEvent, false otherwise
     */
    public boolean hasEvents() {
        return !events.isEmpty();
    }
    
    public boolean handleEvent( ValidationEvent event ) {        
        events.add(event);

        boolean retVal = true;
        switch( event.getSeverity() ) {
            case ValidationEvent.WARNING:
                retVal = true; // continue validation
                break;
            case ValidationEvent.ERROR:
                retVal = true; // continue validation
                break;
            case ValidationEvent.FATAL_ERROR:
                retVal = false; // halt validation
                break;
            default:
                _assert( false, 
                         Messages.format( Messages.UNRECOGNIZED_SEVERITY,
                                 event.getSeverity() ) );
                break;
        }
        
        return retVal;
    }

    private static void _assert( boolean b, String msg ) {
        if( !b ) {
            throw new InternalError( msg );
        }
    }
}