public RevisionInfoQueryCreator(String revisionInfoEntityName,
    String revisionInfoIdName,
    String revisionInfoTimestampName) 
{
        revisionDateQuery = new StringBuilder()
                .append("select rev.").append(revisionInfoTimestampName)
                .append(" from ").append(revisionInfoEntityName)
                .append(" rev where ").append(revisionInfoIdName).append(" = :_revision_number")
                .toString();
        revisionNumberForDateQuery = new StringBuilder()
                .append("select max(rev.").append(revisionInfoIdName)
                .append(") from ").append(revisionInfoEntityName)
                .append(" rev where ").append(revisionInfoTimestampName).append(" < = :_revision_date")
                .toString();
        revisionQuery = new StringBuilder()
                .append("select rev from ").append(revisionInfoEntityName)
                .append(" rev where ").append(revisionInfoIdName)
                .append(" = :_revision_number")
                .toString();
}

 public Query getRevisionDateQuery(Session session,
    Number revision) 
{
        return session.createQuery(revisionDateQuery).setParameter("_revision_number", revision);
}

 public Query getRevisionNumberForDateQuery(Session session,
    Date date) 
{
        return session.createQuery(revisionNumberForDateQuery).setParameter("_revision_date", date.getTime());
}

 public Query getRevisionQuery(Session session,
    Number revision) 
{
        return session.createQuery(revisionQuery).setParameter("_revision_number", revision);
}