| /* |
| * 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 org.apache.bval.constraints; |
| |
| import javax.validation.ConstraintValidator; |
| import javax.validation.ConstraintValidatorContext; |
| import javax.validation.constraints.NotEmpty; |
| |
| import java.lang.reflect.Array; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| |
| /** |
| * {@link ConstraintValidator} implementation for {@link NotEmpty}. |
| * Additionally, check the non-emptiness of an |
| * any object that has a public isEmpty():boolean or a valid toString() method. |
| */ |
| public class NotEmptyValidator implements ConstraintValidator<javax.validation.constraints.NotEmpty, Object> { |
| |
| @Override |
| public boolean isValid(Object value, ConstraintValidatorContext context) { |
| if (value == null) { |
| return false; |
| } |
| if (value.getClass().isArray()) { |
| return Array.getLength(value) > 0; |
| } |
| try { |
| final Method isEmptyMethod = value.getClass().getMethod("isEmpty"); |
| if (isEmptyMethod != null) { |
| return !Boolean.TRUE.equals(isEmptyMethod.invoke(value)); |
| } |
| } catch (IllegalAccessException | NoSuchMethodException | InvocationTargetException iae) { |
| // do nothing |
| } |
| final String s = value.toString(); |
| return s != null && !s.isEmpty(); |
| } |
| } |