/* * Databinder: a simple bridge from Wicket to Hibernate * Copyright (C) 2007 Nathan Hamblen nathan@technically.us * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ package net.databinder.components; import java.net.URI; import java.util.Locale; import net.databinder.converters.URIConverter; import net.databinder.validators.URIValidator; import org.apache.wicket.markup.html.form.TextField; import org.apache.wicket.util.convert.IConverter; import org.apache.wicket.util.string.Strings; /** * TextField for URIs with a default scheme. This field establishes a default URI scheme * and equates it to a null URI. For the UriTextField.Http subclass, the field is initialized with * "http://" and if unchanged the model will be left null. * @author Nathan Hamblen */ public class UriTextField extends TextField<URI> { private String scheme; /** Costructor called by nested subclasses. */ private UriTextField(String id, String scheme) { super(id, java.net.URI.class); this.scheme = scheme; } private String defaultValue() { return scheme + "://"; } /** * Return default value when null. Note that converter is not called from base if null. */ @Override protected String getModelValue() { String value = super.getModelValue(); if (Strings.isEmpty(value)) return defaultValue(); return value; } /** @return specialized converter that equates a default string value to null */ @SuppressWarnings("unchecked") @Override public IConverter getConverter(Class type) { return new URIConverter() { @Override public URI convertToObject(String value, Locale locale) { if (value == null || value.equals(defaultValue())) return null; return super.convertToObject(value, locale); } }; } public static class Http extends UriTextField { public Http(String id) { super(id, "http"); add(URIValidator.HttpScheme()); } } public static class Ftp extends UriTextField { public Ftp(String id) { super(id, "ftp"); add(URIValidator.FtpScheme()); } } }