Package com.caucho.db.jdbc

Source Code of com.caucho.db.jdbc.CursorStatementImpl

/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source 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.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT.  See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
*   Free Software Foundation, Inc.
*   59 Temple Place, Suite 330
*   Boston, MA 02111-1307  USA
*
* @author Scott Ferguson
*/
package com.caucho.db.jdbc;

import java.sql.SQLException;

import com.caucho.db.Database;
import com.caucho.db.sql.Query;
import com.caucho.db.sql.QueryContext;
import com.caucho.db.sql.SelectCursor;
import com.caucho.db.xa.DbTransaction;
import com.caucho.util.L10N;


/**
* The JDBC statement implementation.
*/
public class CursorStatementImpl extends StatementImpl {
  private static final L10N L = new L10N(CursorStatementImpl.class);
 
  CursorStatementImpl(ConnectionImpl conn)
  {
    super(conn);
  }

  @Override
  public java.sql.ResultSet executeQuery(String sql)
    throws SQLException
  {
    Database db = getDatabase();
   
    if (db == null)
      throw new SQLException(L.l("statement is closed"));

    Query query = db.parseQuery(sql);
   
    java.sql.ResultSet rs = executeQuery(query, getQueryContext());

    return rs;
  }

  private java.sql.ResultSet executeQuery(Query query,
                                          QueryContext queryContext)
    throws SQLException
  {
    DbTransaction xa = getConnectionImpl().getTransaction();
   
    queryContext.setNonLocking();
   
    SelectCursor result = query.executeCursor(queryContext, xa);
   
    return new CursorResultSetImpl(this, queryContext, result);
  }
}
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