Java Reflection Method Setter Get getSetter(String key, Class clazz, Class paramClazz)

Description

get Setter

License

Open Source License

Parameter

Parameter	Description
key	a parameter
clazz	a parameter
paramClazz	a parameter

Return

null

Declaration

public static Method getSetter(String key, Class<?> clazz, Class<?> paramClazz) 

Method Source Code

//package com.java2s;
/************************************************************************************
 * @File name   :      ReflectionUtil.java
 *
 * @Author      :      JUNJZHU/*from w ww . j a va2  s .  c o  m*/
 *
 * @Date        :      2012-11-16
 *
 * @Copyright Notice: 
 * Copyright (c) 2012 Shanghai OnStar, Inc. All  Rights Reserved.
 * This software is published under the terms of the Shanghai OnStar Software
 * License version 1.0, a copy of which has been included with this
 * distribution in the LICENSE.txt file.
 * 
 * 
 * ----------------------------------------------------------------------------------
 * Date                        Who               Version            Comments
 * 2012-11-16 ????10:26:21         JUNJZHU         1.0            Initial Version
 ************************************************************************************/

import java.lang.reflect.Method;

public class Main {
    /**
     * @Author : XIAOXCHE
     * @Date : 2012-12-10
     * @param method
     * @return null
     */
    public static Method getSetter(Method method) {
        if (isSetter(method))
            return method;
        if (isGetter(method)) {
            Class<?> clazz = getPropertyClass(method);
            try {
                Method setter = method.getDeclaringClass().getMethod(getSetterName(method), clazz);
                if (isSetter(setter) && getPropertyClass(setter) == getPropertyClass(method))
                    return setter;
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return null;
    }

    /**
     * @Author : XIAOXCHE
     * @Date : 2012-12-10
     * @param method
     * @param declaringClass
     * @return null
     */
    public static Method getSetter(Method method, Class<?> declaringClass) {
        if (isSetter(method))
            return method;
        Class<?> clazz = getPropertyClass(method);
        try {
            return declaringClass.getMethod(getSetterName(method), clazz);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * @Author : XIAOXCHE
     * @Date : 2012-12-10
     * @param key
     * @param clazz
     * @param paramClazz
     * @return null
     */
    public static Method getSetter(String key, Class<?> clazz, Class<?> paramClazz) {
        if (!key.startsWith("set")) {
            key = "set" + getDefaultProperty(key);
        }
        try {
            return clazz.getMethod(key, new Class[] { paramClazz });
        } catch (Exception e) {
            return null;
        }
    }

    /**
     * @Author : XIAOXCHE
     * @Date : 2012-12-10
     * @param methodName
     * @param clazz
     * @return null
     */
    public static Method getSetter(String methodName, Class<?> clazz) {
        Method[] methods = clazz.getMethods();
        for (int i = 0; i < methods.length; i++) {
            Method method = methods[i];
            if (!isSetter(method)) {
                continue;
            }
            if (getDefaultProperty(methodName).equals(getDefaultPropertyName(method))) {
                return method;
            }
        }
        return null;
    }

    /**
     * @Author : XIAOXCHE
     * @Date : 2012-12-10
     * @param method
     * @return method
     */
    public static boolean isSetter(Method method) {
        return method.getName().startsWith("set") && method.getParameterTypes().length == 1
                && method.getReturnType() == void.class;
    }

    /**
     * @Author : XIAOXCHE
     * @Date : 2012-12-10
     * @param method
     * @param clazz
     * @return setter
     */
    public static boolean isSetter(Method method, Class<?> clazz) {
        return isSetter(method) && getPropertyClass(method) == clazz;
    }

    /**
     * @Author : XIAOXCHE
     * @Date : 2012-12-10
     * @param method
     * @return getter
     */
    public static boolean isGetter(Method method) {
        return method.getName().startsWith("get") && method.getParameterTypes().length == 0
                && method.getReturnType() != void.class;
    }

    /**
     * @Author : XIAOXCHE
     * @Date : 2012-12-10
     * @param method
     * @param clazz
     * @return getter
     */
    public static boolean isGetter(Method method, Class<?> clazz) {
        return isGetter(method) && getPropertyClass(method) == clazz;
    }

    /**
     * @Author : XIAOXCHE
     * @Date : 2012-12-10
     * @param method
     * @return null
     */
    public static Class<?> getPropertyClass(Method method) {
        if (isGetter(method)) {
            return method.getReturnType();
        }
        if (isSetter(method)) {
            return method.getParameterTypes()[0];
        }
        return null;
    }

    /**
     * @Author : XIAOXCHE
     * @Date : 2012-12-10
     * @param methodName
     * @param clazz
     * @return null
     */
    public static Method getMethod(String methodName, Class<?> clazz) {
        Method[] methods = clazz.getMethods();
        for (int i = 0; i < methods.length; i++) {
            Method method = methods[i];
            if (method.getName().equals(methodName)) {
                return method;
            }
        }
        return null;
    }

    /**
     * @Author : XIAOXCHE
     * @Date : 2012-12-10
     * @param method
     * @return setterName
     */
    public static String getSetterName(Method method) {
        String name = getDefaultPropertyName(method);
        if (name == null)
            return null;
        return "set" + name;
    }

    /**
     * @Author : XIAOXCHE
     * @Date : 2012-12-10
     * @param property
     * @return propertyName
     */
    public static String getDefaultProperty(String property) {

        char[] chars = property.toCharArray();
        chars[0] = Character.toUpperCase(chars[0]);
        String propertyName = String.valueOf(chars);
        return propertyName;
    }

    /**
     * @Author : XIAOXCHE
     * @Date : 2012-12-10
     * @param method
     * @return defaultPropertyName
     */
    public static String getDefaultPropertyName(Method method) {
        if (isGetter(method) || isSetter(method)) {
            return method.getName().substring(3);
        }
        return null;
    }
}

Related

1. getSetter(Method m)
2. getSetter(Object instance, String methodName)
3. getSetter(Object object, String name, Class type)
4. getSetter(Object target, String property, Class parameterType)
5. getSetter(String fieldName, Class clazz, Class fieldType)
6. getSetter(String property, Object o)
7. getSetter(String propertyName, Class clazz, Class arg)
8. getSetter(String s)
9. getSetterAttributeType(Method m)