001package org.gwtbootstrap3.client.ui.form.validator; 002 003/* 004 * #%L 005 * GwtBootstrap3 006 * %% 007 * Copyright (C) 2015 GwtBootstrap3 008 * %% 009 * Licensed under the Apache License, Version 2.0 (the "License"); 010 * you may not use this file except in compliance with the License. 011 * You may obtain a copy of the License at 012 * 013 * http://www.apache.org/licenses/LICENSE-2.0 014 * 015 * Unless required by applicable law or agreed to in writing, software 016 * distributed under the License is distributed on an "AS IS" BASIS, 017 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 018 * See the License for the specific language governing permissions and 019 * limitations under the License. 020 * #L% 021 */ 022 023import java.util.Collection; 024import java.util.Map; 025 026import org.gwtbootstrap3.client.ui.form.validator.ValidationMessages.Keys; 027 028/** 029 * Validator for checking the length of a map, array, collection, or string value. If type is not one of the 030 * aformentioned, the {@link Object#toString()} method is called to get the string representation of the 031 * object. 032 * 033 * @param <T> the generic type 034 * @author Steven Jardine 035 */ 036public class SizeValidator<T> extends AbstractValidator<T> { 037 038 private Integer maxValue; 039 040 private Integer minValue; 041 042 public SizeValidator(Integer min, Integer max) { 043 super(Keys.SIZE, new Object[] { min, max }); 044 setMin(min); 045 setMax(max); 046 } 047 048 public SizeValidator(Integer min, Integer max, String invalidMessageOverride) { 049 super(invalidMessageOverride); 050 setMin(min); 051 setMax(max); 052 } 053 054 /** {@inheritDoc} */ 055 @Override 056 public int getPriority() { 057 return Priority.MEDIUM; 058 } 059 060 /** {@inheritDoc} */ 061 @Override 062 public boolean isValid(T value) { 063 int length = 0; 064 if (value instanceof Map<?, ?>) { 065 length = ((Map<?, ?>) value).size(); 066 } else if (value instanceof Collection<?>) { 067 length = ((Collection<?>) value).size(); 068 } else if (value instanceof Object[]) { 069 length = ((Object[]) value).length; 070 } else if (value != null) { 071 length = value.toString().length(); 072 } 073 return length >= minValue && length <= maxValue; 074 } 075 076 /** 077 * @param max the max to set 078 */ 079 public void setMax(Integer max) { 080 this.maxValue = max; 081 assert maxValue > 0; 082 } 083 084 /** 085 * @param min the min to set 086 */ 087 public void setMin(Integer min) { 088 minValue = min; 089 if (minValue == null || minValue < 0) { 090 minValue = 0; 091 } 092 } 093 094}