py.una.pol.karaku.dao.entity.interceptors.AbstractInterceptor.java Source code

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Here is the source code for py.una.pol.karaku.dao.entity.interceptors.AbstractInterceptor.java

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/*-
 * Copyright (c)
 *
 *       2012-2014, Facultad Politcnica, Universidad Nacional de Asuncin.
 *       2012-2014, Facultad de Ciencias Mdicas, Universidad Nacional de Asuncin.
 *       2012-2013, Centro Nacional de Computacin, Universidad Nacional de Asuncin.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301  USA
 */
package py.una.pol.karaku.dao.entity.interceptors;

import java.lang.reflect.Field;
import javax.annotation.Nonnull;
import org.springframework.util.ReflectionUtils;
import py.una.pol.karaku.dao.entity.Operation;

/**
 * Clase base para los EntityInterceptors en karaku.
 * 
 * <p>
 * Provee implementacin por defecto de aquellos mtodos que no se necesitan
 * implementar
 * </p>
 * 
 * @author Arturo Volpe
 * @since 1.0
 * @version 1.0 Oct 1, 2013
 * 
 */
public abstract class AbstractInterceptor implements Interceptor {

    @Override
    public Class<?>[] getObservedAnnotations() {

        return new Class<?>[] { void.class };
    }

    @Override
    public java.lang.Class<?>[] getObservedTypes() {

        return new Class<?>[] { void.class };
    }

    @Override
    public boolean interceptable(Operation op, Field field, Object bean) {

        return true;
    }

    /**
     * Retorna el valor de un field de un bean dado.
     * 
     * <p>
     * Es til cuando se necesita obtener valores de otros fields del bean que
     * se esta interceptando.
     * </p>
     * 
     * @param bean
     *            del cual quitar el valor
     * @param field
     *            nombre del atributo
     * @return valor extrado
     */
    protected Object getFieldValueOfBean(@Nonnull Object bean, @Nonnull String field) {

        Field unique = ReflectionUtils.findField(bean.getClass(), field);
        unique.setAccessible(true);
        Object uniqueColumn = ReflectionUtils.getField(unique, bean);
        unique.setAccessible(false);
        return uniqueColumn;
    }
}