JDBC - cannot find getConnection()
package org.DX_57.osgi.SH_27.impl;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import javax.activation.DataSource;
import javax.annotation.Resource;
import org.DX_57.osgi.SH_27.api.SessionHandle;



public class SessionHandleImpl implements SessionHandle {

  @Resource(name="jdbc/Oracle") DataSource ds;

  @Override
  public String sayHello(String name) {
    return "test2 " + name;
  }

  @Override
  public String CheckUserDB(String userToCheck) {
    String storedPassword = null;
    String error_Message = null;
    String SQL_Statement = null;
    String error_Database = null;

    Connection conn = ds.getConnection();
    if (conn == null) throw new SQLException(error_Database = "No connection");

    try {
      conn.setAutoCommit(false);
      boolean committed = false;
      try {
        SQL_Statement = "SELECT Passwd from USERS WHERE Username = ?";

        PreparedStatement passwordQuery = conn.prepareStatement(SQL_Statement);
        passwordQuery.setString(1, userToCheck);

        ResultSet result = passwordQuery.executeQuery();

        if(result.next()){
          storedPassword = result.getString("Passwd");
        }

        conn.commit();
        committed = true;
      } finally {
        if (!committed) conn.rollback();
      }
    } finally {
      conn.close();
    }

    /** if the user is not found or password don't match display error message*/
    if (storedPassword == null) {
      error_Message = "Invalid Username!";
    } else {
      error_Message = "Invalid Password!";
    }

    return storedPassword;
  }
}

import javax.activation.DataSource;

import javax.sql.DataSource;