001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.wicket.bean.validation; 018 019import java.util.ArrayList; 020 021import org.apache.wicket.model.LoadableDetachableModel; 022import org.apache.wicket.util.reference.ClassReference; 023 024/** 025 * A model that can hold on to an array of classes. Useful for keeping a definition of validation 026 * groups to be used to restrict validation. 027 * 028 * @author igor 029 */ 030public class GroupsModel extends LoadableDetachableModel<Class<?>[]> 031{ 032 private static final Class<?>[] EMPTY = new Class<?>[0]; 033 034 private final ArrayList<ClassReference<?>> groups; 035 036 /** 037 * Constructor 038 * 039 * @param groups 040 * an array of groups or {@code null} for none 041 */ 042 public GroupsModel(Class<?>... groups) 043 { 044 if (groups == null || groups.length == 0) 045 { 046 this.groups = null; 047 } 048 else 049 { 050 this.groups = new ArrayList<>(); 051 for (Class<?> group : groups) 052 { 053 this.groups.add(ClassReference.of(group)); 054 } 055 this.groups.trimToSize(); 056 } 057 } 058 059 @Override 060 protected Class<?>[] load() 061 { 062 if (groups == null) 063 { 064 return EMPTY; 065 } 066 067 Class<?>[] classes = new Class[groups.size()]; 068 for (int i = 0; i < groups.size(); i++) 069 { 070 classes[i] = groups.get(i).get(); 071 } 072 073 return classes; 074 } 075 076}