Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.models; import org.apache.wicket.model.AbstractReadOnlyModel; import org.apache.wicket.model.IModel; public class PersonNameModel extends AbstractReadOnlyModel<String> { private final IModel<Person> personModel; public PersonNameModel(IModel<Person> personModel) { this.personModel = personModel; } public String getObject() { Person p = this.personModel.getObject(); if (p == null) return ""; return p.getName(); } }