top.isopen.commons.springboot.util.FieldUtil Maven / Gradle / Ivy
package top.isopen.commons.springboot.util;
import top.isopen.commons.logging.Log;
import top.isopen.commons.logging.LogFactory;
import top.isopen.commons.springboot.repository.support.SFunction;
import java.lang.invoke.SerializedLambda;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/**
* 数据库字段工具类
*
* 将 Lambda 类型属性或 方法名 属性转换为数据库字段
*
* @author TimeChaser
* @version 1.0
* @since 2023/6/15 17:35
*/
public class FieldUtil {
private static final Log log = LogFactory.getLog(FieldUtil.class);
private static final String WRITE_REPLACE = "writeReplace";
private static final String[] PREFIXES = new String[]{"is", "get"};
public static String resolveName(SFunction func) {
try {
Method method = func.getClass().getDeclaredMethod(WRITE_REPLACE);
method.setAccessible(true);
SerializedLambda serializedLambda = (SerializedLambda) method.invoke(func);
String methodName = serializedLambda.getImplMethodName();
return resolveName(methodName);
} catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException e) {
log.error("error come where resolving entity name of SFunction: {}", e);
}
return null;
}
public static String resolveName(String methodName) {
if (methodName == null || methodName.length() == 0) {
return null;
}
for (String prefix : PREFIXES) {
if (methodName.startsWith(prefix)) {
String name = methodName.substring(prefix.length());
return NameUtil.humpToUnderline(name.substring(0, 1).toLowerCase() + name.substring(1));
}
}
return null;
}
public static List resolveDeclaredField(Class clazz) {
Field[] fields = clazz.getDeclaredFields();
List result = new ArrayList<>(Arrays.asList(fields));
Class superclass = clazz.getSuperclass();
if (!Object.class.equals(superclass)) {
result.addAll(resolveDeclaredField(superclass));
}
return result;
}
}