Java tutorial
/* * 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 net.firejack.platform.core.validation; import net.firejack.platform.core.validation.annotation.GreaterThan; import net.firejack.platform.core.validation.annotation.ValidationMode; import net.firejack.platform.core.validation.constraint.vo.Constraint; import net.firejack.platform.core.validation.exception.RuleValidationException; import org.apache.commons.lang.StringUtils; import org.springframework.stereotype.Component; import java.lang.reflect.Method; import java.util.ArrayList; import java.util.List; import java.util.Map; @Component public class GreaterThanProcessor implements IMessageRuleProcessor { @Override public List<ValidationMessage> validate(Method readMethod, String property, Object value, ValidationMode mode) throws RuleValidationException { GreaterThan greaterThanAnnotation = readMethod.getAnnotation(GreaterThan.class); List<ValidationMessage> messages = null; if (greaterThanAnnotation != null) { messages = new ArrayList<ValidationMessage>(); Class<?> returnType = readMethod.getReturnType(); String parameterName = StringUtils.isBlank(greaterThanAnnotation.parameterName()) ? property : greaterThanAnnotation.parameterName(); if (value != null) { if (returnType.getSuperclass() == Number.class || returnType.isPrimitive()) { boolean checkEquality = greaterThanAnnotation.checkEquality(); Number val = null; if (returnType == Float.class || returnType == float.class) { Float f = (Float) value; if (checkEquality && f < greaterThanAnnotation.floatVal() || !checkEquality && f <= greaterThanAnnotation.floatVal()) { val = greaterThanAnnotation.floatVal(); } } else if (returnType == Double.class || returnType == double.class) { Double d = (Double) value; if (checkEquality && d < greaterThanAnnotation.doubleVal() || !checkEquality && d <= greaterThanAnnotation.doubleVal()) { val = greaterThanAnnotation.doubleVal(); } } else { Long longValue = ((Number) value).longValue(); Long rangeValue = ((Integer) greaterThanAnnotation.intVal()).longValue(); if (checkEquality && longValue < rangeValue || !checkEquality && longValue <= rangeValue) { val = greaterThanAnnotation.intVal(); } } if (val != null) { messages.add(new ValidationMessage(property, checkEquality ? greaterThanAnnotation.equalityMsgKey() : greaterThanAnnotation.msgKey(), parameterName, val)); } } } } return messages; } @Override public List<Constraint> generate(Method readMethod, String property, Map<String, String> params) { return null; } }