/*
* 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.giraph.io.hcatalog;
import com.google.common.base.Splitter;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import java.util.List;
import java.util.Map;
/**
* Utilities and helpers for working with Hive tables.
*/
public class HiveUtils {
// TODO use Hive util class if this is already provided by it
/**
* Private constructor for helper class.
*/
private HiveUtils() {
// Do nothing.
}
/**
* @param outputTablePartitionString table partition string
* @return Map
*/
public static Map<String, String> parsePartitionValues(
String outputTablePartitionString) {
if (outputTablePartitionString == null) {
return null;
}
Splitter commaSplitter = Splitter.on(',').omitEmptyStrings().trimResults();
Splitter equalSplitter = Splitter.on('=').omitEmptyStrings().trimResults();
Map<String, String> partitionValues = Maps.newHashMap();
for (String keyValStr : commaSplitter.split(outputTablePartitionString)) {
List<String> keyVal = Lists.newArrayList(equalSplitter.split(keyValStr));
if (keyVal.size() != 2) {
throw new IllegalArgumentException(
"Unrecognized partition value format: " +
outputTablePartitionString);
}
partitionValues.put(keyVal.get(0), keyVal.get(1));
}
return partitionValues;
}
}