org.apache.phoenix.pig.util.TableSchemaParserFunction Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* to you under the Apache License, Version 2.0 (the
* "License"); you maynot 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
*
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package org.apache.phoenix.pig.util;
import org.apache.hadoop.hbase.util.Pair;
import com.google.common.base.Function;
import com.google.common.base.Preconditions;
import com.google.common.base.Splitter;
import com.google.common.collect.Iterables;
/**
*
* A function to parse the table schema passed to LOAD/STORE into a Pair of
*
*/
public final class TableSchemaParserFunction implements Function> {
private static final char TABLE_COLUMN_DELIMITER = '/';
@Override
public Pair apply(final String tableSchema) {
Preconditions.checkNotNull(tableSchema);
Preconditions.checkArgument(!tableSchema.isEmpty(), "HBase Table name is empty!!");
final String tokens[] = Iterables.toArray(Splitter.on(TABLE_COLUMN_DELIMITER).
trimResults().omitEmptyStrings().split(tableSchema) , String.class);
final String tableName = tokens[0];
String columns = null;
if(tokens.length > 1) {
columns = tokens[1];
}
return new Pair(tableName, columns);
}
}
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