br.gov.frameworkdemoiselle.internal.implementation.ConfigurationClassValueExtractor.java Source code

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Here is the source code for br.gov.frameworkdemoiselle.internal.implementation.ConfigurationClassValueExtractor.java

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/*
 * Demoiselle Framework
 * Copyright (C) 2010 SERPRO
 * ----------------------------------------------------------------------------
 * This file is part of Demoiselle Framework.
 * 
 * Demoiselle Framework is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License version 3
 * as published by the Free Software Foundation.
 * 
 * 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 Lesser General Public License version 3
 * along with this program; if not,  see <http://www.gnu.org/licenses/>
 * or write to the Free Software Foundation, Inc., 51 Franklin Street,
 * Fifth Floor, Boston, MA  02110-1301, USA.
 * ----------------------------------------------------------------------------
 * Este arquivo  parte do Framework Demoiselle.
 * 
 * O Framework Demoiselle  um software livre; voc pode redistribu-lo e/ou
 * modific-lo dentro dos termos da GNU LGPL verso 3 como publicada pela Fundao
 * do Software Livre (FSF).
 * 
 * Este programa  distribudo na esperana que possa ser til, mas SEM NENHUMA
 * GARANTIA; sem uma garantia implcita de ADEQUAO a qualquer MERCADO ou
 * APLICAO EM PARTICULAR. Veja a Licena Pblica Geral GNU/LGPL em portugus
 * para maiores detalhes.
 * 
 * Voc deve ter recebido uma cpia da GNU LGPL verso 3, sob o ttulo
 * "LICENCA.txt", junto com esse programa. Se no, acesse <http://www.gnu.org/licenses/>
 * ou escreva para a Fundao do Software Livre (FSF) Inc.,
 * 51 Franklin St, Fifth Floor, Boston, MA 02111-1301, USA.
 */
package br.gov.frameworkdemoiselle.internal.implementation;

import static br.gov.frameworkdemoiselle.annotation.Priority.L2_PRIORITY;

import java.lang.reflect.Field;

import org.apache.commons.configuration.Configuration;

import br.gov.frameworkdemoiselle.annotation.Priority;
import br.gov.frameworkdemoiselle.configuration.ConfigurationValueExtractor;
import br.gov.frameworkdemoiselle.util.Reflections;

@Priority(L2_PRIORITY)
public class ConfigurationClassValueExtractor implements ConfigurationValueExtractor {

    @Override
    public Object getValue(String prefix, String key, Field field, Configuration configuration) throws Exception {
        Object value = null;
        String canonicalName = configuration.getString(prefix + key);

        if (canonicalName != null) {
            value = Reflections.forName(canonicalName);
        }

        return value;
    }

    @Override
    public boolean isSupported(Field field) {
        return field.getType() == Class.class;
    }
}