/**
 * P6Spy
 *
 * Copyright (C) 2002 P6Spy
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.p6spy.engine.spy;

import javax.naming.Context;
import javax.naming.Name;
import javax.naming.Reference;
import javax.naming.spi.ObjectFactory;
import java.util.Hashtable;

/**
 * Factory class for P6DataSource objects
 */

public class P6DataSourceFactory implements ObjectFactory {


  protected static final String DATASOURCE_CLASS_NAME = P6DataSource.class.getName();

  @Override
  public Object getObjectInstance(Object refObj,
                                  Name nm,
                                  Context ctx,
                                  Hashtable<?,?> env) throws Exception {

    final Reference ref = (Reference) refObj;
    final String className = ref.getClassName();

    if (className != null && className.equals(DATASOURCE_CLASS_NAME)) {

      P6DataSource dataSource;
      try {
        dataSource = (P6DataSource) Class.forName(className).newInstance();
      } catch (Exception ex) {
        throw new RuntimeException("Unable to create DataSource of " +
            "class '" + className + "': " + ex.toString());
      }
      // name of the real datasource
      dataSource.setRealDataSource((String) ref.get("dataSourceName").getContent());

      return dataSource;
    } else {
      // Who's class is this anyway, I ask ya!
      return null;
    }
  }
}
