/*
  Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.

  The MySQL Connector/J is licensed under the terms of the GPLv2
  <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most MySQL Connectors.
  There are special exceptions to the terms and conditions of the GPLv2 as it is applied to
  this software, see the FLOSS License Exception
  <http://www.mysql.com/about/legal/licensing/foss-exception.html>.

  This program 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; version 2
  of the License.

  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 General Public License for more details.

  You should have received a copy of the GNU General Public License along with this
  program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth
  Floor, Boston, MA 02110-1301  USA

 */

package com.mysql.jdbc;

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

class NetworkResources {
	private final Socket mysqlConnection;
	private final InputStream mysqlInput;
	private final OutputStream mysqlOutput;
	
	protected NetworkResources(Socket mysqlConnection, InputStream mysqlInput, OutputStream mysqlOutput) {
		this.mysqlConnection = mysqlConnection;
		this.mysqlInput = mysqlInput;
		this.mysqlOutput = mysqlOutput;
	}
	
	/**
     * Forcibly closes the underlying socket to MySQL.
     */
    protected final void forceClose() {	
        try {
        	try {
	            if (this.mysqlInput != null) {
	                this.mysqlInput.close();
	            }
        	} finally {
	            if (this.mysqlConnection != null && !this.mysqlConnection.isClosed() && !this.mysqlConnection.isInputShutdown()) {
	            	try {
	            		this.mysqlConnection.shutdownInput();
	            	} catch (UnsupportedOperationException ex) {
	            		// ignore, some sockets do not support this method
	            	}
	            }
        	}
        } catch (IOException ioEx) {
            // we can't do anything constructive about this
        }

        try {
        	try {
	            if (this.mysqlOutput != null) {
	                this.mysqlOutput.close();
	            }
        	} finally {
        		if (this.mysqlConnection != null && !this.mysqlConnection.isClosed() && !this.mysqlConnection.isOutputShutdown()) {
        			try {
        				this.mysqlConnection.shutdownOutput();
        			} catch (UnsupportedOperationException ex) {
	            		// ignore, some sockets do not support this method
	            	}
        		}
    		}
        } catch (IOException ioEx) {
            // we can't do anything constructive about this
        }

        try {
            if (this.mysqlConnection != null) {
                this.mysqlConnection.close();
            }
        } catch (IOException ioEx) {
            // we can't do anything constructive about this
        }
    }
}
