| // Copyright 2007-2013 The Apache Software Foundation |
| // |
| // Licensed 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 org.apache.tapestry5.validator; |
| |
| import org.apache.tapestry5.Field; |
| import org.apache.tapestry5.MarkupWriter; |
| import org.apache.tapestry5.ValidationException; |
| import org.apache.tapestry5.ioc.MessageFormatter; |
| import org.apache.tapestry5.services.FormSupport; |
| import org.apache.tapestry5.services.javascript.DataConstants; |
| import org.apache.tapestry5.services.javascript.JavaScriptSupport; |
| |
| /** |
| * Validates that a string value has not exceeded a maximum length. |
| */ |
| public final class MaxLength extends AbstractValidator<Integer, String> |
| { |
| public MaxLength(JavaScriptSupport javaScriptSupport) |
| { |
| super(Integer.class, String.class, "maximum-string-length", javaScriptSupport); |
| } |
| |
| public void validate(Field field, Integer constraintValue, MessageFormatter formatter, String value) |
| throws ValidationException |
| { |
| if (value.length() > constraintValue) |
| throw new ValidationException(buildMessage(formatter, field, constraintValue)); |
| } |
| |
| private String buildMessage(MessageFormatter formatter, Field field, Integer constraintValue) |
| { |
| return formatter.format(constraintValue, field.getLabel()); |
| } |
| |
| public void render(Field field, Integer constraintValue, MessageFormatter formatter, MarkupWriter writer, |
| FormSupport formSupport) |
| { |
| if (formSupport.isClientValidationEnabled()) |
| { |
| javaScriptSupport.require("t5/core/validation"); |
| |
| writer.attributes(DataConstants.VALIDATION_ATTRIBUTE, true, |
| "data-validate-max-length", constraintValue.toString(), |
| "data-max-length-message", buildMessage(formatter, field, constraintValue)); |
| } |
| } |
| } |