RTUtils.java

// BlogBridge -- RSS feed reader, manager, and web based service
// Copyright (C) 2002-2006 by R. Pito Salas
//
// This program is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free Software Foundation;
// either version 2 of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along with this program;
// if not, write to the Free Software Foundation, Inc., 59 Temple Place,
// Suite 330, Boston, MA 02111-1307 USA
//
// Contact: R. Pito Salas
// mailto:pitosalas@users.sourceforge.net
// More information: about BlogBridge
// http://www.blogbridge.com
// http://sourceforge.net/projects/blogbridge
//
// $Id: RTUtils.java,v 1.3 2006/05/29 12:50:07 spyromus Exp $
//

package com.salas.bb.utils;

import com.salas.bb.utils.i18n.Strings;

import java.lang.reflect.Method;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.text.MessageFormat;

/**
 * A collection of tools to help at run-time.
 */
public final class RTUtils
{
    private static final Logger LOG = Logger.getLogger(RTUtils.class.getName());

    /** Hidden utility constructor. */
    private RTUtils()
    {
    }

    /**
     * Looks for a method and if it's found, calls it with given boolean parameter.
     *
     * @param obj           object to operate.
     * @param methodName    a name of the method.
     * @param param         parameter value.
     *
     * @return <code>TRUE</code> if the method has been called.
     */
    public static boolean callIfPresent(Object obj, String methodName, boolean param)
    {
        boolean called = false;

        Class clazz = obj.getClass();
        Method method = null;

        try
        {
            method = clazz.getDeclaredMethod(methodName, new Class[] { Boolean.TYPE });
        } catch (NoSuchMethodException e)
        {
            // That's OK
        }

        if (method != null)
        {
            try
            {
                method.invoke(obj, new Object[] { Boolean.valueOf(param) });
                called = true;
            } catch (Exception e)
            {
                LOG.log(Level.SEVERE, MessageFormat.format(
                    Strings.error("failed.to.invoke.detected.method"),
                    new Object[] { methodName }), e);
            }
        }

        return called;
    }
}