| /* |
| * 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.batchee.extras.validation; |
| |
| import org.apache.batchee.doc.api.Documentation; |
| |
| import javax.batch.api.BatchProperty; |
| import javax.batch.api.chunk.ItemProcessor; |
| import javax.inject.Inject; |
| import javax.naming.InitialContext; |
| import javax.naming.NamingException; |
| import javax.validation.ConstraintViolation; |
| import javax.validation.ConstraintViolationException; |
| import javax.validation.Validation; |
| import javax.validation.Validator; |
| import java.util.Set; |
| |
| @Documentation("Uses bean validation to validate incoming items.") |
| public class BeanValidationItemProcessor implements ItemProcessor { |
| @Inject |
| @BatchProperty |
| @Documentation("optional bean validation group to validate") |
| private String group; |
| |
| @Inject |
| @BatchProperty |
| @Documentation("whether a validation failure throws a ConstraintViolationException or just returns null") |
| private String skipNotValidated; |
| |
| @Override |
| public Object processItem(final Object item) throws Exception { |
| final Validator validator = getValidator(); |
| final Set<ConstraintViolation<Object>> result = validate(validator, item); |
| if (result != null && !result.isEmpty()) { |
| if (Boolean.parseBoolean(skipNotValidated)) { |
| return null; |
| } |
| throw new ConstraintViolationException(Set.class.cast(result)); |
| } |
| return item; |
| } |
| |
| private Set<ConstraintViolation<Object>> validate(final Validator validator, final Object item) throws ClassNotFoundException { |
| final Set<ConstraintViolation<Object>> result; |
| if (group == null) { |
| result = validator.validate(item); |
| } else { |
| result = validator.validate(item, loadGroup()); |
| } |
| return result; |
| } |
| |
| protected Class<?> loadGroup() throws ClassNotFoundException { |
| return Thread.currentThread().getContextClassLoader().loadClass(group); |
| } |
| |
| protected Validator getValidator() throws NamingException { |
| Validator validator; |
| try { |
| validator = Validator.class.cast(new InitialContext().lookup("java:comp/Validator")); |
| } catch (final NamingException nnfe) { |
| validator = Validation.buildDefaultValidatorFactory().getValidator(); |
| } |
| return validator; |
| } |
| } |