UserNameMapper.java

/*
 * 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.ignite.hadoop.util;

import org.jetbrains.annotations.Nullable;

import java.io.Serializable;

/**
 * Hadoop file system name mapper. Ensures that correct user name is passed to the underlying Hadoop file system.
 */
public interface UserNameMapper extends Serializable {
    /**
     * Map user name.
     *
     * @param name User name.
     * @return Mapped user name.
     */
    @Nullable public String map(String name);
}