/**
 * Copyright (C) 2009-2013 FoundationDB, LLC
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.foundationdb.sql.pg;

import com.foundationdb.server.service.monitor.SessionMonitor;
import com.foundationdb.server.service.monitor.SessionMonitor.StatementTypes;
import com.foundationdb.sql.optimizer.plan.CostEstimate;

import java.io.IOException;

/**
 * Common handling for cursor-related statements.
 */
public abstract class PostgresBaseCursorStatement extends PostgresStatementResults
                                                  implements PostgresStatement
{
    @Override
    public TransactionMode getTransactionMode() {
        return TransactionMode.ALLOWED;
    }

    @Override
    public TransactionAbortedMode getTransactionAbortedMode() {
        return TransactionAbortedMode.ALLOWED;
    }

    @Override
    public AISGenerationMode getAISGenerationMode() {
        return AISGenerationMode.ALLOWED;
    }

    @Override
    public PostgresType[] getParameterTypes() {
        return null;
    }

    @Override
    public void sendDescription(PostgresQueryContext context,
                                boolean always, boolean params)
            throws IOException {
        if (always) {
            PostgresServerSession server = context.getServer();
            PostgresMessenger messenger = server.getMessenger();
            if (params) {
                messenger.beginMessage(PostgresMessages.PARAMETER_DESCRIPTION_TYPE.code());
                messenger.writeShort(0);
                messenger.sendMessage();
            }
            messenger.beginMessage(PostgresMessages.NO_DATA_TYPE.code());
            messenger.sendMessage();
        }
    }

    @Override
    public boolean hasAISGeneration() {
        return false;
    }

    @Override
    public void setAISGeneration(long generation) {
    }

    @Override
    public long getAISGeneration() {
        return 0;
    }

    @Override
    public CostEstimate getCostEstimate() {
        return null;
    }
}