listusersjdbcrepository.java

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/***********************************************************************
 * Copyright (c) 2000-2004 The Apache Software Foundation.             *
 * All rights reserved.                                                *
 * ------------------------------------------------------------------- *
 * 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 org.apache.james.userrepository;

import org.apache.james.services.User;

import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

/**
 * A very lightweight UserRepository, which persists a list
 * of user names in a database. Password information is not 
 * persisted.
 * 
 */
public class ListUsersJdbcRepository extends AbstractJdbcUsersRepository
{
    /**
     * Reads properties for a User from an open ResultSet.
     * 
     * @param rsUsers A ResultSet with a User record in the current row.
     * @return A User instance
     * @throws SQLException
     *                   if an exception occurs reading from the ResultSet
     */
    protected User readUserFromResultSet(ResultSet rsUsers) throws SQLException {
        // Get the username, and build a DefaultUser with it.
        String username = rsUsers.getString(1);
        DefaultUser user = new DefaultUser(username, "SHA");
        return user;
    }

    /**
     * Set parameters of a PreparedStatement object with 
     * property values from a User instance.
     * @param user       a User instance, which should be an implementation class which
     *                   is handled by this Repostory implementation.
     * @param userInsert a PreparedStatement initialised with SQL taken from the "insert" SQL definition.
     * @throws SQLException
     *                   if an exception occurs while setting parameter values.
     */
    protected void setUserForInsertStatement(User user, 
                                             PreparedStatement userInsert) 
        throws SQLException {
        userInsert.setString(1, user.getUserName());
    }

    /**
     * Set parameters of a PreparedStatement object with
     * property values from a User instance.
     * 
     * @param user       a User instance, which should be an implementation class which
     *                   is handled by this Repostory implementation.
     * @param userUpdate a PreparedStatement initialised with SQL taken from the "update" SQL definition.
     * @throws SQLException
     *                   if an exception occurs while setting parameter values.
     */
    protected void setUserForUpdateStatement(User user, 
                                             PreparedStatement userUpdate) 
        throws SQLException {
        throw new UnsupportedOperationException("Can't update a List User - " +
                                                "only has a single attribute.");
    }
}