sqlfilter.java

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/*
 * Copyright (c) 2000 jPOS.org.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *    "This product includes software developed by the jPOS project
 *    (http://www.jpos.org/)". Alternately, this acknowledgment may
 *    appear in the software itself, if and wherever such third-party
 *    acknowledgments normally appear.
 *
 * 4. The names "jPOS" and "jPOS.org" must not be used to endorse
 *    or promote products derived from this software without prior
 *    written permission. For written permission, please contact
 *    [e-mail].
 *
 * 5. Products derived from this software may not be called "jPOS",
 *    nor may "jPOS" appear in their name, without prior written
 *    permission of the jPOS project.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE JPOS PROJECT OR ITS CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the jPOS Project.  For more
 * information please see <http://www.jpos.org/>.
 */

package org.jpos.iso.filter;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import java.sql.*;
import org.jpos.iso.ISOFilter;
import org.jpos.iso.ISOFilter.VetoException;
import org.jpos.iso.ISOException;
import org.jpos.iso.ISOMsg;
import org.jpos.iso.ISOField;
import org.jpos.iso.ISOChannel;
import org.jpos.util.LogEvent;
import org.jpos.util.JepUtil;

import org.jpos.core.Configuration;
import org.jpos.core.Configurable;
import org.jpos.core.NodeConfigurable;
import org.jpos.core.ConfigurationException;
import org.jpos.tpl.*;

/**
 * SQLFilter useful to execute sql statement.
 * @author <a href="mailto:[e-mail]">Zhiyu Tang</a>
 * @version $Revision: 1.1 $ $Date: 2002/08/06 15:29:42 $
 */
public class SQLFilter implements ISOFilter, Configurable, NodeConfigurable {
    ConnectionPool connect = null;
    Configuration cfg;

    String SQLUpdate[];
    String condition[];
    JepUtil jeputil;
    int condNum;

    public SQLFilter () {
	super();
        condNum = 0;
        SQLUpdate = null;
        condition = null;
        jeputil = new JepUtil();
    }
   /**
    * @param cfg
    * <ul>
    *  <li>ConnectionPool - connectionpool
    * </ul>
    */
    public void setConfiguration (Configuration cfg)
        throws ConfigurationException
    {
        this.cfg = cfg;
        try {
            this.connect = ConnectionPool.getConnectionPool (cfg.get ("ConnectionPool", null) );
        } catch (Exception e) {
            throw new ConfigurationException (e);
        }
    }

    public void setConfiguration (Node node)
        throws ConfigurationException
    {
      NodeList nodes = node.getChildNodes();
      condNum = nodes.getLength();
      int i, j = 0;
      for( i=0 ; i < condNum; i++ )
      {
        if (nodes.item(i).getNodeName().equals ("SQL"))
          j++;
      }

      condition = new String[j];
      SQLUpdate = new String[j];
      j = 0;
      for( i=0 ; i < condNum; i++ )
      {
        if (nodes.item(i).getNodeName().equals ("SQL")) {
        condition[j] = nodes.item(i).getAttributes().getNamedItem ("switch").getNodeValue();
        SQLUpdate[j] = nodes.item(i).getAttributes().getNamedItem ("statement").getNodeValue();
        j++;
       }
      }
	condNum = j;
    }

    private void SQLStatement( ISOMsg m,  LogEvent evt)
           throws ISOException
    {

      Connection engine = null;
      try {
        engine = connect.getConnection();
        Statement s = engine.createStatement();
        for( int i = 0 ; i < condNum ; i++ ){
          if( jeputil.getResultBoolean(m , condition[i]))
            s.executeUpdate ( jeputil.replaceMacro(m, SQLUpdate[i]));
        }
        connect.free( engine );
      }
      catch (SQLException ex) {
        throw new ISOException(ex);
      }
    }

    public ISOMsg filter (ISOChannel channel, ISOMsg m, LogEvent evt)
        throws VetoException
    {
      if( SQLUpdate != null )
      {
        try {
          SQLStatement( m , evt );
        } catch (Exception e) {
          evt.addMessage (e);
          throw new VetoException(e);
        }
      }
   	return m;
    }
}