/*
 * JBoss, Home of Professional Open Source.
 * Copyright (c) 2011, Red Hat, Inc., and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This 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 software 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 software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.jboss.as.ejb3.tx;

import javax.ejb.TransactionAttributeType;

import org.jboss.as.ee.component.Component;
import org.jboss.as.ee.component.ComponentInterceptorFactory;
import org.jboss.as.ejb3.logging.EjbLogger;
import org.jboss.as.ejb3.component.EJBComponent;
import org.jboss.as.ejb3.component.MethodIntf;
import org.jboss.invocation.Interceptor;
import org.jboss.invocation.InterceptorContext;
import org.jboss.invocation.InterceptorFactoryContext;
import org.jboss.invocation.proxy.MethodIdentifier;

/**
 * Transaction interceptor for Singleton and Stateless beans,
 *
 * @author <a href="mailto:cdewolf@redhat.com">Carlo de Wolf</a>
 */
public class LifecycleCMTTxInterceptor extends CMTTxInterceptor implements Interceptor {

    private final TransactionAttributeType transactionAttributeType;
    private final int transactionTimeout;

    public LifecycleCMTTxInterceptor(final TransactionAttributeType transactionAttributeType, final int transactionTimeout) {
        this.transactionAttributeType = transactionAttributeType;
        this.transactionTimeout = transactionTimeout;
    }


    @Override
    public Object processInvocation(InterceptorContext invocation) throws Exception {
        final EJBComponent component = (EJBComponent) invocation.getPrivateData(Component.class);

        switch (transactionAttributeType) {
            case MANDATORY:
                return mandatory(invocation, component);
            case NEVER:
                return never(invocation, component);
            case NOT_SUPPORTED:
                return notSupported(invocation, component);
            case REQUIRED:
                return required(invocation, component, transactionTimeout);
            case REQUIRES_NEW:
                return requiresNew(invocation, component, transactionTimeout);
            case SUPPORTS:
                return supports(invocation, component);
            default:
                throw EjbLogger.ROOT_LOGGER.unknownTxAttributeOnInvocation(transactionAttributeType, invocation);
        }
    }

    /**
     * @author Stuart Douglas
     */
    public static class Factory extends ComponentInterceptorFactory {

        private final MethodIdentifier methodIdentifier;
        /**
         * If this is false it means the bean is a SFSB, and can only be NOT_SUPPORTED or REQUIRES_NEW
         */
        private final boolean treatRequiredAsRequiresNew;

        public Factory(final MethodIdentifier methodIdentifier, final boolean treatRequiredAsRequiresNew) {
            this.methodIdentifier = methodIdentifier;
            this.treatRequiredAsRequiresNew = treatRequiredAsRequiresNew;
        }

        @Override
        protected Interceptor create(Component component, InterceptorFactoryContext context) {
            final EJBComponent ejb = (EJBComponent) component;
            TransactionAttributeType txAttr;
            if (methodIdentifier == null) {
                if(treatRequiredAsRequiresNew) {
                    txAttr = TransactionAttributeType.REQUIRED;
                } else {
                    //for stateful beans we default to NOT_SUPPORTED
                    txAttr = TransactionAttributeType.NOT_SUPPORTED;
                }
            } else {
                txAttr = ejb.getTransactionAttributeType(MethodIntf.BEAN, methodIdentifier, treatRequiredAsRequiresNew ? TransactionAttributeType.REQUIRES_NEW : TransactionAttributeType.NOT_SUPPORTED);
            }
            final int txTimeout;
            if(methodIdentifier == null) {
                txTimeout = -1;
            } else {
                txTimeout = ejb.getTransactionTimeout(MethodIntf.BEAN, methodIdentifier);
            }
            if (treatRequiredAsRequiresNew && txAttr == TransactionAttributeType.REQUIRED) {
                txAttr = TransactionAttributeType.REQUIRES_NEW;
            }
            if(!treatRequiredAsRequiresNew ) {
                if(txAttr != TransactionAttributeType.NOT_SUPPORTED &&
                        txAttr != TransactionAttributeType.REQUIRES_NEW) {
                    EjbLogger.ROOT_LOGGER.invalidTransactionTypeForSfsbLifecycleMethod(txAttr, methodIdentifier, ejb.getComponentClass());
                    txAttr = TransactionAttributeType.NOT_SUPPORTED;
                }
            }
            final LifecycleCMTTxInterceptor interceptor = new LifecycleCMTTxInterceptor(txAttr, txTimeout);
            return interceptor;
        }
    }

}
