edu.ku.brc.dbsupport.AuditInterceptor.java Source code

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Here is the source code for edu.ku.brc.dbsupport.AuditInterceptor.java

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/* Copyright (C) 2015, University of Kansas Center for Research
 * 
 * Specify Software Project, specify@ku.edu, Biodiversity Institute,
 * 1345 Jayhawk Boulevard, Lawrence, Kansas, 66045, USA
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * This program 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/
package edu.ku.brc.dbsupport;

import java.io.Serializable;
import java.security.AccessController;
import java.security.PrivilegedAction;

import org.hibernate.EmptyInterceptor;
import org.hibernate.Transaction;
import org.hibernate.type.Type;

/**
 *
 *
 * @code_status Alpha
 *
 * @author rods
 *
 */
public abstract class AuditInterceptor extends EmptyInterceptor {
    protected static AuditInterceptor instance = null;

    /* (non-Javadoc)
     * @see org.hibernate.EmptyInterceptor#onDelete(java.lang.Object, java.io.Serializable, java.lang.Object[], java.lang.String[], org.hibernate.type.Type[])
     */
    @Override
    public abstract void onDelete(Object entity, Serializable id, Object[] state, String[] propertyNames,
            Type[] types);

    /* (non-Javadoc)
     * @see org.hibernate.EmptyInterceptor#onFlushDirty(java.lang.Object, java.io.Serializable, java.lang.Object[], java.lang.Object[], java.lang.String[], org.hibernate.type.Type[])
     */
    @Override
    public abstract boolean onFlushDirty(Object entity, Serializable id, Object[] currentState,
            Object[] previousState, String[] propertyNames, Type[] types);

    /* (non-Javadoc)
     * @see org.hibernate.EmptyInterceptor#onLoad(java.lang.Object, java.io.Serializable, java.lang.Object[], java.lang.String[], org.hibernate.type.Type[])
     */
    @Override
    public abstract boolean onLoad(Object entity, Serializable id, Object[] state, String[] propertyNames,
            Type[] types);

    /* (non-Javadoc)
     * @see org.hibernate.EmptyInterceptor#onSave(java.lang.Object, java.io.Serializable, java.lang.Object[], java.lang.String[], org.hibernate.type.Type[])
     */
    @Override
    public abstract boolean onSave(Object entity, Serializable id, Object[] state, String[] propertyNames,
            Type[] types);

    /* (non-Javadoc)
     * @see org.hibernate.EmptyInterceptor#afterTransactionCompletion(org.hibernate.Transaction)
     */
    @Override
    public abstract void afterTransactionCompletion(Transaction tx);

    /**
     * Returns the instance of the AuditInterceptor.
     * @return the instance of the AuditInterceptor.
     */
    public static AuditInterceptor getInstance() {
        if (instance != null) {
            return instance;

        }
        // else
        String factoryName = AccessController.doPrivileged(new PrivilegedAction<String>() {
            public String run() {
                return System.getProperty("edu.ku.brc.dbsupport.AuditInterceptor"); //$NON-NLS-1$
            }
        });

        if (factoryName != null) {
            try {
                instance = (AuditInterceptor) Class.forName(factoryName).newInstance();
                return instance;

            } catch (Exception e) {
                edu.ku.brc.af.core.UsageTracker.incrHandledUsageCount();
                edu.ku.brc.exceptions.ExceptionTracker.getInstance().capture(AuditInterceptor.class, e);
                InternalError error = new InternalError(
                        "Can't instantiate AuditInterceptor factory " + factoryName); //$NON-NLS-1$
                error.initCause(e);
                throw error;
            }
        }
        return null;
    }

}