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JDBC Driver for the Firebird RDBMS
There is a newer version: 2.2.7
/*
 * $Id: isc_db_handle_impl.java 56959 2012-04-15 10:26:21Z mrotteveel $
 * 
 * Firebird Open Source J2ee connector - jdbc driver
 *
 * Distributable under LGPL license.
 * You may obtain a copy of the License at http://www.gnu.org/copyleft/lgpl.html
 *
 * 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
 * LGPL License for more details.
 *
 * This file was created by members of the firebird development team.
 * All individual contributions remain the Copyright (C) of those
 * individuals.  Contributors to this file are either listed here or
 * can be obtained from a CVS history command.
 *
 * All rights reserved.
 */
/*
 *
 * The Original Code is the Firebird Java GDS implementation.
 *
 * The Initial Developer of the Original Code is Alejandro Alberola.
 * Portions created by Alejandro Alberola are Copyright (C) 2001
 * Boix i Oltra, S.L. All Rights Reserved.
 */
package org.firebirdsql.gds.impl.wire;

import java.io.IOException;
import java.net.Socket;

import org.firebirdsql.gds.impl.AbstractIscDbHandle;

/**
 * Describe class isc_db_handle_impl here.
 * 
 * @author David Jencks
 * @version 1.0
 */
public class isc_db_handle_impl extends AbstractIscDbHandle {

    private static final int DEFAULT_RESP_DATA = 65536;

    Socket socket;
    public XdrOutputStream out;
    public WireXdrInputStream in;
    private int resp_data_len;
    EventCoordinator eventCoordinator;

    public isc_db_handle_impl() {
        super(new byte[DEFAULT_RESP_DATA]);
    }

    protected void invalidate() throws IOException {
        if (!isValid())
            return;

        IOException ioeToThrow = null;
        
        // TODO: Shouldn't this synchronize on *this*?
        try {
            try {
                in.close();
            } catch (IOException e) {
                ioeToThrow = e;
            }
            try {
                out.close();
            } catch (IOException e) {
                if (ioeToThrow == null) {
                    ioeToThrow = e;
                }
            }
            try {
                socket.close();
            } catch (IOException e) {
                if (ioeToThrow == null) {
                    ioeToThrow = e;
                }
            }
        } finally {
            in = null;
            out = null;
            socket = null;
    
            invalidateHandle();
            if (ioeToThrow != null) {
                throw ioeToThrow;
            }
        }
    }

    void addTransaction(isc_tr_handle_impl tr) {
        checkValidity();
        rdb_transactions.add(tr);
    }

    void removeTransaction(isc_tr_handle_impl tr) {
        checkValidity();
        rdb_transactions.remove(tr);
    }

    public byte[] getResp_data_truncated() {
        byte[] dest = new byte[getResp_data_len()];
        System.arraycopy(getResp_data(), 0, dest, 0, dest.length);
        return dest;
    }

    public void setResp_data_len(int len) {
        this.resp_data_len = len;
    }

    public int getResp_data_len() {
        return this.resp_data_len;
    }
}