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 javax.validation.constraints.Size; 020 021import org.apache.wicket.markup.ComponentTag; 022import org.apache.wicket.markup.html.form.FormComponent; 023 024/** 025 * A tag modifier that adds the {@code maxlength} and {@code minlength} attributes to the {@code input} 026 * and {@code textarea} tag with the max/min value from the {@link Size} constraint annotation. 027 * 028 * @author igor 029 * 030 */ 031public class SizeTagModifier implements ITagModifier<Size> 032{ 033 @Override 034 public void modify(FormComponent<?> component, ComponentTag tag, Size annotation) 035 { 036 if (hasLengthAttribute(tag.getName())) 037 { 038 tag.put("maxlength", annotation.max()); 039 040 if (annotation.min() > 0) 041 { 042 tag.put("minlength", annotation.min()); 043 } 044 } 045 } 046 047 protected boolean hasLengthAttribute(String tagName) 048 { 049 return "input".equalsIgnoreCase(tagName) || "textarea".equalsIgnoreCase(tagName); 050 } 051}