Java Reflection Method Setter Get getSetterMethodForClass(Class cls, String beanName, Class type)

Description

Obtain a (Java bean) setter method from a class or superclasses using reflection.

License

Open Source License

Parameter

Parameter	Description
cls	the class to find the setter from
beanName	the name of the java bean to find the setter for
type	the type of the java bean to find the setter for

Return

The setter Method

Declaration

public static Method getSetterMethodForClass(Class cls, String beanName, Class type) 

Method Source Code

//package com.java2s;
/**********************************************************************
Copyright (c) 2004 Andy Jefferson and others. All rights reserved. 
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at/*from ww w  .  j  a  va  2 s. co  m*/
    
http://www.apache.org/licenses/LICENSE-2.0
    
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License. 
    
    
Contributors:
...
**********************************************************************/

import java.lang.reflect.Method;

public class Main {
    /**
     * Obtain a (Java bean) setter method from a class or superclasses using reflection.
     * @param cls the class to find the setter from
     * @param beanName the name of the java bean to find the setter for
     * @param type the type of the java bean to find the setter for
     * @return The setter Method
     */
    public static Method getSetterMethodForClass(Class cls, String beanName, Class type) {
        return findDeclaredMethodInHeirarchy(cls, getJavaBeanSetterName(beanName), type);
    }

    private static Method findDeclaredMethodInHeirarchy(Class cls, String methodName, Class... parameterTypes) {
        try {
            do {
                try {
                    return cls.getDeclaredMethod(methodName, parameterTypes);
                } catch (NoSuchMethodException e) {
                    cls = cls.getSuperclass();
                }
            } while (cls != null);
        } catch (Exception e) {
            // do nothing
        }
        return null;
    }

    /**
     * Generate a JavaBeans compatible setter name
     * @param fieldName the field name
     * @return the setter name
     */
    public static String getJavaBeanSetterName(String fieldName) {
        if (fieldName == null) {
            return null;
        }
        return buildJavaBeanName("set", fieldName);
    }

    private static String buildJavaBeanName(String prefix, String fieldName) {
        int prefixLength = prefix.length();
        StringBuilder sb = new StringBuilder(prefixLength + fieldName.length());
        sb.append(prefix);
        sb.append(fieldName);
        sb.setCharAt(prefixLength, Character.toUpperCase(sb.charAt(prefixLength)));
        return sb.toString();
    }
}

Related

1. getSetterMethod(Object obj, String name)
2. getSetterMethod(String getterName, Class returnType, Class containingClass)
3. getSetterMethod(String setterName, Object bean, Class setterParamType)
4. getSetterMethodByFieldName(String fieldName, Field field)
5. getSetterMethodByProperty(String propertyName, Class beanClass, Class setterParamType)
6. getSetterMethodFromGetter(final Method getter)
7. getSetterMethods(Class clazz)
8. getSetterMethods(Class clazz)
9. getSetterMethods(Class clazz)