Java tutorial
/******************************************************************************* * Copyright (c) 2011 University of Western Australia. All rights reserved. * * This file is part of The Ark. * * The Ark is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 3 * of the License, or (at your option) any later version. * * The Ark 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 for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. ******************************************************************************/ package au.org.theark.core.web.component; import org.apache.wicket.Component; import org.apache.wicket.behavior.Behavior; import org.apache.wicket.markup.ComponentTag; import org.apache.wicket.markup.html.form.FormComponent; public class ArkErrorHighlightBehaviour extends Behavior { private static final long serialVersionUID = -5544350240467988658L; public void onComponentTag(Component c, ComponentTag tag) { try { FormComponent<?> fc = (FormComponent<?>) c; if (!fc.isValid()) { tag.put("class", "error"); } } catch (ClassCastException cce) { // ignore non FormComponent Objects } } }