package test;
 
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.math.BigDecimal;
 
import everyDay.Person;
 
/**
 * Created by lightClouds917
 * Date 2017/12/29
 * Description:根據(jù)屬性名反射獲取get和set方法
 */
public class TestReflect3 {
 
    public static void main(String[] args)throws Exception{
        //test removeLine
        System.out.println(removeLine("abg_dwr"));
        System.out.println(removeLine("ab_wr"));
        System.out.println(removeLine("abgwr"));
        System.out.println(removeLine(null));
 
        //test get
        Person person1 = new Person();
        person1.setAge(11);
        person1.setName("旺旺");
        Object ob = getGetMethod(person1, "name");
        System.out.println(ob);
        
        //test set
        Person person2 = new Person();
        String field2 = "name";
        setValue(person2, person2.getClass(), field2, Person.class.getDeclaredField(field2).getType(), "汪汪");
        System.out.println(person2);
        //獲取某個屬性的類型
        System.out.println(Person.class.getDeclaredField("age").getType());
    
    }
    
    /**
     * 根據(jù)屬性渊胸，獲取get方法
     * @param ob 對象
     * @param name 屬性名
     * @return
     * @throws Exception
     */
    public static Object getGetMethod(Object ob , String name)throws Exception{
        Method[] m = ob.getClass().getMethods();
        for(int i = 0;i < m.length;i++){
            if(("get"+name).toLowerCase().equals(m[i].getName().toLowerCase())){
                return m[i].invoke(ob);
            }
        }
        return null;
    }
    
    /**
     * 根據(jù)屬性旬盯，拿到set方法，并把值set到對象中
     * @param obj 對象
     * @param clazz 對象的class
     * @param fileName 需要設(shè)置值得屬性
     * @param typeClass 
     * @param value
     */
    public static void setValue(Object obj,Class<?> clazz,String filedName,Class<?> typeClass,Object value){
        filedName = removeLine(filedName);
        String methodName = "set" + filedName.substring(0,1).toUpperCase()+filedName.substring(1);
        try{
            Method method =  clazz.getDeclaredMethod(methodName, new Class[]{typeClass});
            method.invoke(obj, new Object[]{getClassTypeValue(typeClass, value)});
        }catch(Exception ex){
            ex.printStackTrace();
        }
    }
    
    /**
     * 通過class類型獲取獲取對應(yīng)類型的值
     * @param typeClass class類型
     * @param value 值
     * @return Object
     */
    private static Object getClassTypeValue(Class<?> typeClass, Object value){
        if(typeClass == int.class  || value instanceof Integer){
            if(null == value){
                return 0;
            }
            return value;
        }else if(typeClass == short.class){
            if(null == value){
                return 0;
            }
            return value;
        }else if(typeClass == byte.class){
            if(null == value){
                return 0;
            }
            return value;
        }else if(typeClass == double.class){
            if(null == value){
                return 0;
            }
            return value;
        }else if(typeClass == long.class){
            if(null == value){
                return 0;
            }
            return value;
        }else if(typeClass == String.class){
            if(null == value){
                return "";
            }
            return value;
        }else if(typeClass == boolean.class){
            if(null == value){
                return true;
            }
            return value;
        }else if(typeClass == BigDecimal.class){
            if(null == value){
                return new BigDecimal(0);
            }
            return new BigDecimal(value+"");
        }else {
            return typeClass.cast(value);
        }
    }
    /**
     * 處理字符串  如：  abc_dex ---> abcDex
     * @param str
     * @return
     */
    public static  String removeLine(String str){
        if(null != str && str.contains("_")){
            int i = str.indexOf("_");
            char ch = str.charAt(i+1);
            char newCh = (ch+"").substring(0, 1).toUpperCase().toCharArray()[0];
            String newStr = str.replace(str.charAt(i+1), newCh);
            String newStr2 = newStr.replace("_", "");
            return newStr2;
        }
        return str;
    }
}