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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.commons.dbcp2.datasources;

import java.io.Serializable;

/**
 * Holds a username, password pair.  Serves as a poolable object key for the KeyedObjectPool
 * backing a SharedPoolDataSource.  Two instances with the same username are considered equal.
 * This ensures that there will be only one keyed pool for each user in the pool.  The password
 * is used (along with the username) by the KeyedCPDSConnectionFactory when creating new connections.
 *
 * {@link InstanceKeyDataSource#getConnection(String, String)} validates that the password used to create
 * a connection matches the password provided by the client.
 *
 * @version $Revision: 1572242 $ $Date: 2014-02-26 20:34:39 +0000 (Wed, 26 Feb 2014) $
 * @since 2.0
 */
class UserPassKey implements Serializable {
    private static final long serialVersionUID = 5142970911626584817L;
    private final String password;
    private final String username;

    UserPassKey(String username, String password) {
        this.username = username;
        this.password = password;
    }

    /**
     * Get the value of password.
     * @return value of password.
     */
    public String getPassword() {
        return password;
    }

    /**
     * Get the value of username.
     * @return value of username.
     */
    public String getUsername() {
        return username;
    }

    /**
     * @return true if the username fields for both
     * objects are equal.  Two instances with the same username
     * but different passwords are considered equal.
     *
     * @see java.lang.Object#equals(java.lang.Object)
     */
    @Override
    public boolean equals(Object obj) {
        if (obj == null) {
            return false;
        }

        if (obj == this) {
            return true;
        }

        if (!(obj instanceof UserPassKey)) {
            return false;
        }

        UserPassKey key = (UserPassKey) obj;

        return this.username == null ?
                key.username == null :
                this.username.equals(key.username);
    }

    /**
     * Returns the hash of the username.
     */
    @Override
    public int hashCode() {
        return this.username != null ?
                this.username.hashCode() : 0;
    }

    @Override
    public String toString() {
        StringBuffer sb = new StringBuffer(50);
        sb.append("UserPassKey(");
        sb.append(username).append(", ").append(password).append(')');
        return sb.toString();
    }
}