com.dianping.lion.util.BeanUtils.java Source code

Introduction

Here is the source code for com.dianping.lion.util.BeanUtils.java

Source

/**
 * Project: com.dianping.lion.lion-console-0.0.1
 * 
 * File Created at 2012-7-15
 * $Id$
 * 
 * Copyright 2010 dianping.com.
 * All rights reserved.
 *
 * This software is the confidential and proprietary information of
 * Dianping Company. ("Confidential Information").  You shall not
 * disclose such Confidential Information and shall use it only in
 * accordance with the terms of the license agreement you entered into
 * with dianping.com.
 */
package com.dianping.lion.util;

import java.lang.reflect.Field;

import org.apache.commons.lang.ArrayUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.util.Assert;

/**
 * @author danson.liu
 *
 */
public class BeanUtils {

    private static transient final Logger logger = LoggerFactory.getLogger(BeanUtils.class);

    @SuppressWarnings("unchecked")
    public static <T> T getDeclaredFieldValue(Object object, String propertyName) throws NoSuchFieldException {
        Assert.notNull(object);
        Assert.hasText(propertyName);

        Field field = getDeclaredField(object.getClass(), propertyName);

        boolean accessible = field.isAccessible();
        Object result = null;
        synchronized (field) {
            field.setAccessible(true);
            try {
                result = field.get(object);
            } catch (IllegalAccessException e) {
                throw new NoSuchFieldException("No such field: " + object.getClass() + '.' + propertyName);
            } finally {
                field.setAccessible(accessible);
            }
        }
        return (T) result;
    }

    public static Field getDeclaredField(Class<?> clazz, String propertyName) throws NoSuchFieldException {
        Assert.notNull(clazz);
        Assert.hasText(propertyName);
        for (Class<?> superClass = clazz; superClass != Object.class; superClass = superClass.getSuperclass()) {

            try {
                return superClass.getDeclaredField(propertyName);
            } catch (NoSuchFieldException e) {
                // Field??,?
                logger.debug("no such method !");
            }
        }
        throw new NoSuchFieldException("No such field: " + clazz.getName() + '.' + propertyName);
    }

    public static Field[] getDeclaredFields(Class<?> clazz) {
        Assert.notNull(clazz);
        Field[] fields = clazz.getDeclaredFields();
        for (Class<?> superClass = clazz; superClass != Object.class; superClass = superClass.getSuperclass()) {
            fields = (Field[]) ArrayUtils.addAll(fields, superClass.getDeclaredFields());
        }
        return fields;
    }

}