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package com.awsle.aibatis.reflect;
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import java.lang.reflect.Field;
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import java.lang.reflect.InvocationTargetException;
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import java.lang.reflect.Method;
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import java.text.ParseException;
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import java.text.SimpleDateFormat;
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import java.util.Date;
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/**
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*
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* @author 席有芳
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* @url http://code.awsle.com/index.php/p/aibatis/
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* @mail 951868171@qq.com
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* @version 1.0
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* @since aibatis-Alpha1.0.zip
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*/
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public class FieldUtils {
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public static Method getFieldGetMethod(Class<?> clazz, Field f) {
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String fn = f.getName();
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Method m = getFieldGetMethod(clazz, fn);
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if(m == null && f.getType() == boolean.class){
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m = getBooleanFieldGetMethod(clazz, fn);
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}
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return m;
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}
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public static Method getBooleanFieldGetMethod(Class<?> clazz, String fieldName) {
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String mn = "is" + fieldName.substring(0, 1).toUpperCase() + fieldName.substring(1);
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if(isISStart(fieldName)){
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mn = fieldName;
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}
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try {
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return clazz.getDeclaredMethod(mn);
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} catch (NoSuchMethodException e) {
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e.printStackTrace();
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return null;
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}
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}
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public static Method getBooleanFieldSetMethod(Class<?> clazz, Field f) {
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String fn = f.getName();
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String mn = "set" + fn.substring(0, 1).toUpperCase() + fn.substring(1);
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if(isISStart(f.getName())){
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mn = "set" + fn.substring(2, 3).toUpperCase() + fn.substring(3);
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}
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try {
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return clazz.getDeclaredMethod(mn, f.getType());
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} catch (NoSuchMethodException e) {
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e.printStackTrace();
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return null;
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}
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}
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private static boolean isISStart(String fieldName){
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if(fieldName==null || fieldName.trim().length()==0)
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return false;
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//is开头，并且is之后第一个字母是大写 比如 isAdmin
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return fieldName.startsWith("is") && !Character.isLowerCase(fieldName.charAt(2));
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}
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public static Method getFieldGetMethod(Class<?> clazz, String fieldName) {
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String mn = "get" + fieldName.substring(0, 1).toUpperCase() + fieldName.substring(1);
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try {
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return clazz.getDeclaredMethod(mn);
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} catch (NoSuchMethodException e) {
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e.printStackTrace();
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return null;
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}
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}
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public static Method getFieldSetMethod(Class<?> clazz, Field f) {
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String fn = f.getName();
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String mn = "set" + fn.substring(0, 1).toUpperCase() + fn.substring(1);
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try {
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return clazz.getDeclaredMethod(mn, f.getType());
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} catch (NoSuchMethodException e) {
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if(f.getType() == boolean.class){
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return getBooleanFieldSetMethod(clazz, f);
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}
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}
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return null;
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}
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public static Method getFieldSetMethod(Class<?> clazz, String fieldName) {
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try {
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return getFieldSetMethod(clazz, clazz.getDeclaredField(fieldName));
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} catch (SecurityException e) {
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e.printStackTrace();
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} catch (NoSuchFieldException e) {
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e.printStackTrace();
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}
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return null;
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}
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/**
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* 获取某个字段的值
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* @param entity
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* @param fieldName
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* @return
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*/
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public static Object getFieldValue(Object entity,Field field){
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Method method = getFieldGetMethod(entity.getClass(), field);
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return invoke(entity, method);
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}
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/**
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* 获取某个字段的值
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* @param entity
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* @param fieldName
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* @return
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*/
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public static Object getFieldValue(Object entity,String fieldName){
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Method method = getFieldGetMethod(entity.getClass(), fieldName);
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return invoke(entity, method);
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}
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/**
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* 设置某个字段的值
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* @param entity
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* @param fieldName
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* @return
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*/
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public static void setFieldValue(Object entity,Field field,Object value){
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try {
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Method set = getFieldSetMethod(entity.getClass(), field);
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if (set != null && value != null) {
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set.setAccessible(true);
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Class<?> type = field.getType();
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if (type == String.class) {
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set.invoke(entity, value.toString());
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} else if (type == int.class || type == Integer.class) {
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set.invoke(entity, value == null ? (Integer) null : Integer.parseInt(value.toString()));
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} else if (type == float.class || type == Float.class) {
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set.invoke(entity, value == null ? (Float) null: Float.parseFloat(value.toString()));
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} else if (type == long.class || type == Long.class) {
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set.invoke(entity, value == null ? (Long) null: Long.parseLong(value.toString()));
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} else if (type == Date.class) {
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set.invoke(entity, value == null ? (Date) null: stringToDateTime(value.toString()));
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} else {
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set.invoke(entity, value);
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}
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}
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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/**
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* 获取某个字段的值
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* @param entity
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* @param fieldName
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* @return
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*/
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public static Field getFieldByName(Class<?> clazz,String fieldName){
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Field field = null;
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if(fieldName!=null){
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try {
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field = clazz.getDeclaredField(fieldName);
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} catch (SecurityException e) {
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e.printStackTrace();
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} catch (NoSuchFieldException e) {
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e.printStackTrace();
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}
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}
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return field;
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}
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/**
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* 获取某个实体执行某个方法的结果
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* @param obj
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* @param method
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* @return
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*/
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private static Object invoke(Object obj , Method method){
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if(obj == null || method == null) return null;
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try {
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return method.invoke(obj);
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} catch (IllegalArgumentException e) {
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e.printStackTrace();
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} catch (IllegalAccessException e) {
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e.printStackTrace();
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} catch (InvocationTargetException e) {
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e.printStackTrace();
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}
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return null;
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}
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public static boolean isBaseDateType(Field field){
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Class<?> clazz = field.getType();
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return clazz.equals(String.class) ||
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clazz.equals(Integer.class)||
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clazz.equals(Byte.class) ||
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clazz.equals(Long.class) ||
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clazz.equals(Double.class) ||
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clazz.equals(Float.class) ||
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clazz.equals(Character.class) ||
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clazz.equals(Short.class) ||
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clazz.equals(Boolean.class) ||
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clazz.equals(Date.class) ||
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clazz.equals(java.util.Date.class) ||
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clazz.equals(java.sql.Date.class) ||
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clazz.isPrimitive();
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}
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private static Date stringToDateTime(String strDate) {
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if (strDate != null) {
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try {
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return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse(strDate);
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} catch (ParseException e) {
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e.printStackTrace();
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}
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}
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return null;
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}
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}
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