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 * as indicated by the @author tags. See the copyright.txt file in the
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 *
 * 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
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 *
 * 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
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 */

package org.jboss.as.jpa.processor;

import org.jboss.as.jpa.config.Configuration;
import org.jboss.as.jpa.config.PersistenceUnitMetadataHolder;
import org.jboss.as.server.deployment.DeploymentPhaseContext;
import org.jboss.as.server.deployment.DeploymentUnit;
import org.jboss.as.server.deployment.DeploymentUnitProcessingException;
import org.jboss.as.server.deployment.DeploymentUnitProcessor;
import org.jboss.as.server.deployment.DeploymentUtils;
import org.jboss.as.server.deployment.module.DelegatingClassTransformer;
import org.jboss.as.server.deployment.module.ResourceRoot;
import org.jipijapa.plugin.spi.PersistenceUnitMetadata;

/**
 * Deployment processor which ensures the persistence provider ClassFileTransformer are used.
 *
 * @author Scott Marlow
 */
public class JPAClassFileTransformerProcessor implements DeploymentUnitProcessor {

    public JPAClassFileTransformerProcessor() {
    }

    /**
     * Add dependencies for modules required for Jakarta Persistence deployments
     */
    public void deploy(DeploymentPhaseContext phaseContext) throws DeploymentUnitProcessingException {
        final DeploymentUnit deploymentUnit = phaseContext.getDeploymentUnit();
        setClassLoaderTransformer(deploymentUnit);
    }

    private void setClassLoaderTransformer(DeploymentUnit deploymentUnit) {
        // (AS7-2233) each persistence unit can use a persistence provider, that might need
        // to use ClassTransformers.  Providers that need class transformers will add them
        // during the call to CreateContainerEntityManagerFactory.

        DelegatingClassTransformer transformer = deploymentUnit.getAttachment(DelegatingClassTransformer.ATTACHMENT_KEY);
        boolean appContainsPersistenceProviderJars = false;  // remove when we revert WFLY-10520
        if ( transformer != null) {

            for (ResourceRoot resourceRoot : DeploymentUtils.allResourceRoots(deploymentUnit)) {
                PersistenceUnitMetadataHolder holder = resourceRoot.getAttachment(PersistenceUnitMetadataHolder.PERSISTENCE_UNITS);
                if (holder != null) {
                    for (PersistenceUnitMetadata pu : holder.getPersistenceUnits()) {
                        if (Configuration.needClassFileTransformer(pu)) {
                            transformer.addTransformer(new JPADelegatingClassFileTransformer(pu));
                        }
                    }
                }
            }
        }
    }
}
