Java tutorial
/* * The MIT License (MIT) * * Copyright (c) 2016 Jon Peterson * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.github.jonpeterson.jackson.module.versioning; import com.fasterxml.jackson.databind.BeanDescription; import com.fasterxml.jackson.databind.introspect.AnnotatedMember; import com.fasterxml.jackson.databind.introspect.BeanPropertyDefinition; import com.fasterxml.jackson.databind.introspect.POJOPropertyBuilder; public class VersionedModelUtils { public static BeanPropertyDefinition getSerializeToVersionProperty(BeanDescription beanDescription) throws RuntimeException { BeanPropertyDefinition serializeToVersionProperty = null; for (BeanPropertyDefinition definition : beanDescription.findProperties()) { // merge field and accessor annotations if (definition instanceof POJOPropertyBuilder) ((POJOPropertyBuilder) definition).mergeAnnotations(true); AnnotatedMember accessor = definition.getAccessor(); if (accessor != null && accessor.hasAnnotation(JsonSerializeToVersion.class)) { if (serializeToVersionProperty != null) throw new RuntimeException("@" + JsonSerializeToVersion.class.getSimpleName() + " must be present on at most one field or method"); if (accessor.getRawType() != String.class || (definition.getField() == null && !definition.hasGetter())) throw new RuntimeException("@" + JsonSerializeToVersion.class.getSimpleName() + " must be on a field or a getter method that returns a String"); serializeToVersionProperty = definition; } } return serializeToVersionProperty; } private VersionedModelUtils() { } }