package com.baidu.disconf.client.scan.inner;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.baidu.disconf.client.common.annotations.DisconfFile;
import com.baidu.disconf.client.common.annotations.DisconfFileItem;
import com.baidu.disconf.client.common.annotations.DisconfItem;
import com.baidu.disconf.client.common.update.IDisconfUpdate;
import com.baidu.disconf.core.common.constants.DisConfigTypeEnum;
import com.github.knightliao.apollo.utils.common.ClassUtils;
/**
* 扫描校验模块
*
* @author liaoqiqi
* @version 2014-6-15
*/
public class ScanVerify {
protected static final Logger LOGGER = LoggerFactory
.getLogger(ScanVerify.class);
/**
* 判断回调函数实现的接口是否正确
*
* @return
*/
public static boolean hasIDisconfUpdate(Class<?> disconfUpdateServiceClass) {
Class<?>[] interfaceClasses = disconfUpdateServiceClass.getInterfaces();
boolean hasInterface = false;
for (Class<?> infClass : interfaceClasses) {
if (infClass.equals(IDisconfUpdate.class)) {
hasInterface = true;
}
}
if (!hasInterface) {
LOGGER.error("Your class " + disconfUpdateServiceClass.toString()
+ " should implement interface: "
+ IDisconfUpdate.class.toString());
return false;
}
return true;
}
/**
* 判断配置文件的类型是否正确
*
* @return
*/
public static boolean isDisconfFileTypeRight(DisconfFile disconfFile) {
String fileName = disconfFile.filename();
if (!fileName.endsWith(".properties")) {
LOGGER.error("now we only support .properites conf: "
+ disconfFile.toString());
return false;
}
return true;
}
/**
* 对于一个 get/is 方法，返回其相对应的Field
*
* @return
*/
public static Field getFieldFromMethod(Method method,
Field[] expectedFields, DisConfigTypeEnum disConfigTypeEnum) {
String fieldName = null;
if (disConfigTypeEnum.equals(DisConfigTypeEnum.FILE)) {
DisconfFileItem disconfFileItem = method
.getAnnotation(DisconfFileItem.class);
// 根据用户设定的注解来获取
fieldName = disconfFileItem.associateField();
} else {
DisconfItem disItem = method.getAnnotation(DisconfItem.class);
// 根据用户设定的注解来获取
fieldName = disItem.associateField();
}
//
// 如果用户未设定注解，则猜其名字
//
if (StringUtils.isEmpty(fieldName)) {
// 从方法名 获取其 Field 名
fieldName = ClassUtils
.getFieldNameByGetMethodName(method.getName());
}
// 确认此Field名是正确的
for (Field field : expectedFields) {
if (field.getName().equals(fieldName)) {
return field;
}
}
LOGGER.error(method.toString() + " cannot get its related field name. ");
return null;
}
}