com.facebook.hiveio.conf.LongConfOption.java Source code

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Here is the source code for com.facebook.hiveio.conf.LongConfOption.java

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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 com.facebook.hiveio.conf;

import org.apache.hadoop.conf.Configuration;

/**
 * Long configuration option
 */
public class LongConfOption extends AbstractConfOption {
    /** Default value */
    private long defaultValue;

    /**
     * Constructor
     * @param key key
     * @param defaultValue default value
     */
    public LongConfOption(String key, long defaultValue) {
        super(key);
        this.defaultValue = defaultValue;
        AllOptions.add(this);
    }

    public long getDefaultValue() {
        return defaultValue;
    }

    @Override
    public String getDefaultValueStr() {
        return Long.toString(defaultValue);
    }

    @Override
    public ConfOptionType getType() {
        return ConfOptionType.LONG;
    }

    /**
     * Lookup value
     * @param conf Configuration
     * @return value set for key, or defaultValue
     */
    public long get(Configuration conf) {
        return conf.getLong(getKey(), defaultValue);
    }

    /**
     * Set value for key
     * @param conf Configuration
     * @param value to set
     */
    public void set(Configuration conf, long value) {
        conf.setLong(getKey(), value);
    }

    /**
     * Set value if it's not already present
     * @param conf Configuration
     * @param value to set
     */
    public void setIfUnset(Configuration conf, long value) {
        if (conf.get(getKey()) == null) {
            conf.setLong(getKey(), value);
        }
    }
}