Examples with FetchRequest org.datanucleus.store.rdbms.request.FetchRequest used on opensource projects

Example 1 with FetchRequest

use of org.datanucleus.store.rdbms.request.FetchRequest in project datanucleus-rdbms by datanucleus.

the class RDBMSPersistenceHandler method getFetchRequest.

/**
 * Returns a request object that will fetch a row from the given table.
 * The store manager will cache the request object for re-use by subsequent requests to the same table.
 * @param table The table from which to fetch.
 * @param mmds MetaData for the members corresponding to the columns to be fetched.
 * @param cmd ClassMetaData of the object of the request
 * @param clr ClassLoader resolver
 * @return A fetch request object.
 */
private Request getFetchRequest(DatastoreClass table, AbstractMemberMetaData[] mmds, AbstractClassMetaData cmd, ClassLoaderResolver clr) {
    RequestIdentifier reqID = new RequestIdentifier(table, mmds, RequestType.FETCH, cmd.getFullClassName());
    Request req = requestsByID.get(reqID);
    if (req == null) {
        req = new FetchRequest(table, mmds, cmd, clr);
        requestsByID.put(reqID, req);
    }
    return req;
}