/*
 * ============================================================================
 * GNU Lesser General Public License
 * ============================================================================
 *
 * Beanlet - JSE Application Container.
 * Copyright (C) 2006  Leon van Zantvoort
 * 
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.
 * 
 * Leon van Zantvoort
 * 243 Acalanes Drive #11
 * Sunnyvale, CA 94086
 * USA
 *
 * zantvoort@users.sourceforge.net
 * http://beanlet.org
 */
package org.beanlet.transaction.impl;

import java.lang.annotation.Annotation;
import java.lang.reflect.Modifier;
import org.beanlet.BeanletValidationException;
import org.beanlet.plugin.BeanletConfiguration;
import org.beanlet.common.SingleElementBeanletConfigurationValidator;
import org.beanlet.transaction.TransactionAttribute;
import org.beanlet.transaction.TransactionSynchronization;

/**
 *
 * @author Leon van Zantvoort
 */
public abstract class TransactionSynchronizationBeanletConfigurationValidator<T extends Annotation> extends
        SingleElementBeanletConfigurationValidator<T> {
    
    public Class<?> getReturnType() {
        return null;
    }

    public Class<?>[] getExceptionTypes() {
        return new Class[]{};
    }

    public int getRequiredModifiers() {
        return 0;
    }

    public int getInvalidModifiers() {
        return Modifier.STATIC;
    }

    public boolean isTransactional(BeanletConfiguration configuration) {
        return !configuration.getAnnotationDomain().getDeclaration(
                TransactionAttribute.class).
                getElements(configuration.getType()).isEmpty();
    }

    public boolean isBeanletTypeRequired() {
        return true;
    }
    
    @Override
    public void validate(BeanletConfiguration configuration) throws
            BeanletValidationException {
        if (!configuration.getAnnotationDomain().getDeclaration(
                annotationType()).getElements(configuration.getType()).isEmpty() ||
                TransactionSynchronization.class.isAssignableFrom(configuration.getType())) {
            if (!isTransactional(configuration)) {
                throw new BeanletValidationException(
                        configuration.getComponentName(),
                        "Transaction synchronization only " +
                        "supported for transactional beanlets.");
            }
        }
        super.validate(configuration);
    }
}