Java Reflection Field Set setField(String fieldName, Object instance, Class instanceClass, Object value)

Description

set Field

License

Open Source License

Declaration

@SuppressWarnings("unchecked")
    public static void setField(String fieldName, Object instance, Class instanceClass, Object value) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2005-2012 eBay Inc.//from  w w w  . j  ava 2s  .co m
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 *******************************************************************************/

import java.lang.reflect.Field;

public class Main {
    @SuppressWarnings("unchecked")
    public static void setField(String fieldName, Object instance, Class instanceClass, Object value) {
        if (instanceClass == null) {
            throw new RuntimeException("NoSuchField: " + fieldName);
        }
        try {
            Field field = instanceClass.getDeclaredField(fieldName);
            field.setAccessible(true);
            field.set(instance, value);
        } catch (NoSuchFieldException e) {
            setField(fieldName, instance, instanceClass.getSuperclass(), value);
        } catch (IllegalAccessException e) {
            throw new RuntimeException(e);
        }
    }

    public static void setField(String fieldName, Object instance, Object value) {
        setField(fieldName, instance, instance.getClass(), value);
    }
}

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