com.amazon.ionhiveserde.configuration.source.RawConfiguration Maven / Gradle / Ivy

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An Apache Hive SerDe (short for serializer/deserializer) for the Ion file format.

There is a newer version: 1.2.0

/*
 * Copyright 2018 Amazon.com, Inc. or its affiliates. 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.
 * A copy of the License is located at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * or in the "license" file accompanying this file. This file 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.amazon.ionhiveserde.configuration.source;

import java.util.Optional;

/**
 * Raw configuration as a mapping from string keys to string values.
 */
public interface RawConfiguration {

    /**
     * Gets the configured value for a key. If no value is configured returns the default value.
     * @param key key to lookup.
     * @param defaultValue value to return if no value is associated to the key.
     * @return found value or defaultValue.
     */
    String getOrDefault(final String key, final String defaultValue);

    /**
     * Gets the configured value for a key.
     *
     * @param key key to lookup.
     * @return found value or Optional.empty()
     */
    Optional get(final String key);

    /**
     * Returns true if there is a value configured for the key
     *
     * @param key key to lookup .
     * @return true if it has a value associated with the key.
     */
    boolean containsKey(final String key);
}