connectionfactory.java

一个数据挖掘软件ALPHAMINERR的整个过程的JAVA版源代码

/*
 *    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; either version 2 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 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

 /**
  * Title: XELOPES Data Mining Library
  * Description: The XELOPES library is an open platform-independent and data-source-independent library for Embedded Data Mining.
  * Copyright: Copyright (c) 2002 Prudential Systems Software GmbH
  * Company: ZSoft (www.zsoft.ru), Prudsys (www.prudsys.com)
  * @author Michael Thess
  * @version 1.2
  */

package com.prudsys.pdm.Olap.Resource;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.Hashtable;

import javax.naming.Context;
import javax.naming.NamingException;
import javax.olap.OLAPException;

 /**
  * Connection factory for Xelopes OLAP server. Name binding mechanism
  * is based on ideas of Mondrian project.
  */
public class ConnectionFactory extends com.prudsys.pdm.Cwm.Core.Class
     implements javax.olap.resource.ConnectionFactory, javax.naming.spi.InitialContextFactory
{

  public ConnectionFactory() {
  }

  public javax.olap.resource.Connection getConnection() throws OLAPException {
          throw new UnsupportedOperationException();
  }

  public javax.olap.resource.Connection getConnection(javax.olap.resource.ConnectionSpec properties) throws OLAPException {
          return new Connection();
  }

  public javax.olap.resource.ConnectionSpec createConnectionSpec() throws OLAPException {
          return new ConnectionSpec();
  }

  public javax.olap.resource.ResourceAdapterMetaData getMetaData() throws OLAPException {
          throw new UnsupportedOperationException();
  }

  public Context getInitialContext(Hashtable environment) throws NamingException {
          return (Context) Proxy.newProxyInstance(
            null, new Class[] {Context.class}, new ContextHandler() );
  }

public class ContextHandler implements InvocationHandler {

    public Object lookup(String name) throws NamingException {

      if ( !name.equals("JOLAPServer") )
         throw new NamingException("wrong name");

       return ConnectionFactory.this;
    }

    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {

      Method matchingMethod = null;
      try {
         matchingMethod = getClass().getMethod(
           method.getName(), method.getParameterTypes() );
      }
      catch (Exception e) {
         throw new UnsupportedOperationException();
      }
      if (matchingMethod.getReturnType() != method.getReturnType()) {
         throw new UnsupportedOperationException();
      };

      return matchingMethod.invoke(this, args);
    }
}

}