gobblin.compliance.utils.DatasetUtils.java Source code

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Here is the source code for gobblin.compliance.utils.DatasetUtils.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 gobblin.compliance.utils;

import java.util.List;

import com.google.common.base.Optional;

import lombok.extern.slf4j.Slf4j;

import gobblin.compliance.HivePartitionDataset;

/**
 * @author adsharma
 */
@Slf4j
public class DatasetUtils {
    /**
     * Find {@link HivePartitionDataset} given complete partition name from a list of datasets
     * @param partitionName Complete partition name ie dbName@tableName@partitionName
     */
    public static Optional<HivePartitionDataset> findDataset(String partitionName,
            List<HivePartitionDataset> datasets) {
        for (HivePartitionDataset dataset : datasets) {
            if (dataset.datasetURN().equalsIgnoreCase(partitionName)) {
                return Optional.fromNullable(dataset);
            }
        }
        log.warn("Unable to find dataset corresponding to " + partitionName);
        return Optional.<HivePartitionDataset>absent();
    }

    public static String getProperty(HivePartitionDataset dataset, String property, long defaultValue) {
        Optional<String> propertyValueOptional = Optional.fromNullable(dataset.getParams().get(property));
        if (!propertyValueOptional.isPresent()) {
            return Long.toString(defaultValue);
        }
        try {
            long propertyVal = Long.parseLong(propertyValueOptional.get());
            if (propertyVal < 0) {
                return Long.toString(defaultValue);
            } else {
                return Long.toString(propertyVal);
            }
        } catch (NumberFormatException e) {
            return Long.toString(defaultValue);
        }
    }
}