001    /*
002     * Copyright (C) 2003-2009 eXo Platform SAS.
003     *
004     * This is free software; you can redistribute it and/or modify it
005     * under the terms of the GNU Lesser General Public License as
006     * published by the Free Software Foundation; either version 2.1 of
007     * the License, or (at your option) any later version.
008     *
009     * This software is distributed in the hope that it will be useful,
010     * but WITHOUT ANY WARRANTY; without even the implied warranty of
011     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012     * Lesser General Public License for more details.
013     *
014     * You should have received a copy of the GNU Lesser General Public
015     * License along with this software; if not, write to the Free
016     * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
017     * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
018     */
019    package org.crsh.util;
020    
021    import java.io.Closeable;
022    import java.io.IOException;
023    import java.net.Socket;
024    import java.sql.Connection;
025    import java.sql.ResultSet;
026    import java.sql.SQLException;
027    import java.sql.Statement;
028    
029    /**
030     * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
031     * @version $Revision$
032     */
033    public class Safe {
034    
035      public static void close(Socket socket) {
036        if (socket != null) {
037          try {
038            socket.close();
039          }
040          catch (IOException ignore) {
041          }
042        }
043      }
044    
045      public static void close(Closeable closeable) {
046        if (closeable != null) {
047          try {
048            closeable.close();
049          }
050          catch (IOException ignore) {
051          }
052        }
053      }
054    
055      public static void close(Connection connection) {
056        if (connection != null) {
057          try {
058            connection.close();
059          }
060          catch (SQLException ignore) {
061          }
062        }
063      }
064    
065      public static void close(Statement statement) {
066        if (statement != null) {
067          try {
068            statement.close();
069          }
070          catch (SQLException ignore) {
071          }
072        }
073      }
074    
075      public static void close(ResultSet rs) {
076        if (rs != null) {
077          try {
078            rs.close();
079          }
080          catch (SQLException ignore) {
081          }
082        }
083      }
084    
085      public static <T extends Throwable> void rethrow(Class<T> throwableClass, Throwable cause) throws T {
086        T throwable;
087    
088        //
089        try {
090          throwable = throwableClass.newInstance();
091        }
092        catch (Exception e) {
093          throw new AssertionError(e);
094        }
095    
096        //
097        throwable.initCause(cause);
098    
099        //
100        throw throwable;
101      }
102    }