com.npower.dm.util.BeanHelper.java Source code

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Here is the source code for com.npower.dm.util.BeanHelper.java

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/**
 * $Header: /home/master/nWave-DM-Common/src/com/npower/dm/util/BeanHelper.java,v 1.2 2007/08/29 06:21:00 zhao Exp $
 * $Revision: 1.2 $
 * $Date: 2007/08/29 06:21:00 $
 *
 * ===============================================================================================
 * License, Version 1.1
 *
 * Copyright (c) 1994-2007 NPower Network Software Ltd.  All rights reserved.
 *
 * This SOURCE CODE FILE, which has been provided by NPower as part
 * of a NPower product for use ONLY by licensed users of the product,
 * includes CONFIDENTIAL and PROPRIETARY information of NPower.
 *
 * USE OF THIS SOFTWARE IS GOVERNED BY THE TERMS AND CONDITIONS
 * OF THE LICENSE STATEMENT AND LIMITED WARRANTY FURNISHED WITH
 * THE PRODUCT.
 *
 * IN PARTICULAR, YOU WILL INDEMNIFY AND HOLD NPower, ITS RELATED
 * COMPANIES AND ITS SUPPLIERS, HARMLESS FROM AND AGAINST ANY CLAIMS
 * OR LIABILITIES ARISING OUT OF THE USE, REPRODUCTION, OR DISTRIBUTION
 * OF YOUR PROGRAMS, INCLUDING ANY CLAIMS OR LIABILITIES ARISING OUT OF
 * OR RESULTING FROM THE USE, MODIFICATION, OR DISTRIBUTION OF PROGRAMS
 * OR FILES CREATED FROM, BASED ON, AND/OR DERIVED FROM THIS SOURCE
 * CODE FILE.
 * ===============================================================================================
 */
package com.npower.dm.util;

import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import org.apache.commons.lang.StringUtils;

/**
 * private/protectedprivate/protectedBeanUtils.
 * ,,protected, . Apache
 * Jarkarta Commons BeanUtils
 * 
 * @author Zhao DongLu
 * @version $Revision: 1.2 $ $Date: 2007/08/29 06:21:00 $
 */
public class BeanHelper {
    /**
     * private/protected
     */
    static public Object getDeclaredProperty(Object object, String propertyName)
            throws IllegalAccessException, NoSuchFieldException {
        assert object != null;
        assert StringUtils.isNotEmpty(propertyName);
        Field field = object.getClass().getDeclaredField(propertyName);
        return getDeclaredProperty(object, field);
    }

    /**
     * private/protected
     */
    static public Object getDeclaredProperty(Object object, Field field) throws IllegalAccessException {
        assert object != null;
        assert field != null;
        boolean accessible = field.isAccessible();
        field.setAccessible(true);
        Object result = field.get(object);
        field.setAccessible(accessible);
        return result;
    }

    /**
     * private/protected
     */
    static public void setDeclaredProperty(Object object, String propertyName, Object newValue)
            throws IllegalAccessException, NoSuchFieldException {
        assert object != null;
        assert StringUtils.isNotEmpty(propertyName);

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

    /**
     * private/protected
     */
    static public void setDeclaredProperty(Object object, Field field, Object newValue)
            throws IllegalAccessException {
        boolean accessible = field.isAccessible();
        field.setAccessible(true);
        field.set(object, newValue);
        field.setAccessible(accessible);
    }

    /**
     * private/protected
     */
    static public Object getPrivateProperty(Object object, String propertyName)
            throws IllegalAccessException, NoSuchFieldException {
        assert object != null;
        assert StringUtils.isNotEmpty(propertyName);
        Field field = object.getClass().getDeclaredField(propertyName);
        field.setAccessible(true);
        return field.get(object);
    }

    /**
     * private/protected
     */
    static public void setPrivateProperty(Object object, String propertyName, Object newValue)
            throws IllegalAccessException, NoSuchFieldException {
        assert object != null;
        assert StringUtils.isNotEmpty(propertyName);

        Field field = object.getClass().getDeclaredField(propertyName);
        field.setAccessible(true);
        field.set(object, newValue);
    }

    /**
     * private/protected
     */
    static public Object invokePrivateMethod(Object object, String methodName, Object[] params)
            throws NoSuchMethodException, IllegalAccessException, InvocationTargetException {
        assert object != null;
        assert StringUtils.isNotEmpty(methodName);
        Class<?>[] types = new Class[params.length];
        for (int i = 0; i < params.length; i++) {
            types[i] = params[i].getClass();
        }
        Method method = object.getClass().getDeclaredMethod(methodName, types);
        method.setAccessible(true);
        return method.invoke(object, params);
    }

    /**
     * private/protected
     */
    static public Object invokePrivateMethod(Object object, String methodName, Object param)
            throws NoSuchMethodException, IllegalAccessException, InvocationTargetException {
        return invokePrivateMethod(object, methodName, new Object[] { param });
    }

}