/* * Copyright (C) 2018 the original author or authors. * * 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 com.alibaba.codeless.framework.autoconfigure; import com.alibaba.codeless.framework.core.utils.StringUtils; import org.springframework.util.Assert; import javax.persistence.Id; import java.lang.reflect.Field; import java.lang.reflect.Method; /** * @author xiaolongzuo */ public class CodelessEntityMetadata { private Class<?> entityClass; private Method getIdMethod; private Field idField; public CodelessEntityMetadata(Class<?> entityClass) { Assert.notNull(entityClass, "The entity class must not be null!"); this.entityClass = entityClass; this.idField = findIdField(this.entityClass); this.getIdMethod = findGetIdMethod(this.entityClass, this.idField); } private Field findIdField(Class<?> clazz) { Field[] fields = clazz.getDeclaredFields(); if (fields == null) { return null; } for (Field field : fields) { if (field.getDeclaredAnnotation(Id.class) != null) { return field; } } return null; } private Method findGetIdMethod(Class<?> clazz, Field idField) { String fieldName = idField.getName(); String getMethodName = fieldName.length() <= 1 ? "get" + fieldName.toUpperCase() : "get" + fieldName.substring(0, 1).toUpperCase() + fieldName.substring(1); try { return clazz.getDeclaredMethod(getMethodName, new Class[0]); } catch (NoSuchMethodException e) { throw new RuntimeException(e); } } public Class<?> getEntityClass() { return entityClass; } public Method getGetIdMethod() { return getIdMethod; } public Field getIdField() { return idField; } public Object getIdValue(String stringValue) { return StringUtils.toPrimitives(idField.getType(), stringValue); } }