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

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Here is the source code for py.una.pol.karaku.dao.entity.interceptors.TimeInterceptor.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 java.util.Calendar;
import java.util.Date;
import org.springframework.stereotype.Component;
import org.springframework.util.ReflectionUtils;
import py.una.pol.karaku.dao.entity.Operation;
import py.una.pol.karaku.dao.entity.annotations.Time;

/**
 *
 * @author Arturo Volpe
 * @since 1.0
 * @version 1.0 Oct 1, 2013
 *
 */
@Component
public class TimeInterceptor extends AbstractInterceptor {

    /**
     *
     */
    private static final int FIRST_DAY_OF_YEAR = 1;
    /**
     *
     */
    private static final int FIRST_YEAR = 1970;

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

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

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

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

    }

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

        return op != Operation.DELETE;
    }

    @Override
    public void intercept(Operation op, Field f, Object bean) {

        Object o = ReflectionUtils.getField(f, bean);

        if (o == null) {
            return;
        }

        Time t = f.getAnnotation(Time.class);
        Date date = (Date) o;
        Calendar c = Calendar.getInstance();
        c.setTime(date);

        if ((t == null) || t.type().equals(Time.Type.DATE)) {
            this.handleDate(c);
        } else if (t.type().equals(Time.Type.TIME)) {
            this.handleTime(c);
        }
        // DATETIME no es manejado por que no requeire ningun
        // trato especial

        c.set(Calendar.SECOND, 0);
        c.set(Calendar.MILLISECOND, 0);
        ReflectionUtils.setField(f, bean, c.getTime());
    }

    /**
     * @param c
     */
    private void handleTime(Calendar c) {

        c.set(Calendar.YEAR, FIRST_YEAR);
        c.set(Calendar.DAY_OF_YEAR, FIRST_DAY_OF_YEAR);

    }

    /**
     * @param c
     */
    private void handleDate(Calendar c) {

        c.set(Calendar.HOUR_OF_DAY, 0);
        c.set(Calendar.MINUTE, 0);
    }

}