/**
* Copyright 2013 Cloudera Inc.
*
* Licensed 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.cloudera.cdk.data;
import com.cloudera.cdk.data.FieldPartitioner;
import com.cloudera.cdk.data.PartitionExpression;
import com.cloudera.cdk.data.PartitionStrategy;
import com.cloudera.cdk.data.partition.HashFieldPartitioner;
import com.cloudera.cdk.data.partition.MinuteFieldPartitioner;
import com.cloudera.cdk.data.partition.YearFieldPartitioner;
import java.util.List;
import org.junit.Assert;
import org.junit.Test;
public class TestPartitionExpression {
@Test
public void testPartitionStrategy() {
String expr = "hash(\"username\", \"username_part\", 2)";
PartitionExpression expression = new PartitionExpression(expr, true);
PartitionStrategy strategy = expression.evaluate();
List<FieldPartitioner> fieldPartitioners = strategy.getFieldPartitioners();
Assert.assertEquals(1, fieldPartitioners.size());
FieldPartitioner fp = fieldPartitioners.get(0);
Assert.assertEquals(HashFieldPartitioner.class, fp.getClass());
Assert.assertEquals("username", fp.getSourceName());
Assert.assertEquals("username_part", fp.getName());
Assert.assertEquals(2, fp.getCardinality());
Assert.assertEquals(expr, PartitionExpression.toExpression(strategy));
}
@Test
public void testSubpartitionStrategy() {
String expr = "[hash(\"username\", \"username_part\", 2), hash(\"username2\", " +
"\"username2_part\", 3)]";
PartitionExpression expression = new PartitionExpression(expr, true);
PartitionStrategy strategy = expression.evaluate();
List<FieldPartitioner> fieldPartitioners = strategy.getFieldPartitioners();
Assert.assertEquals(2, fieldPartitioners.size());
FieldPartitioner fp0 = fieldPartitioners.get(0);
Assert.assertEquals(HashFieldPartitioner.class, fp0.getClass());
Assert.assertEquals("username_part", fp0.getName());
Assert.assertEquals(2, fp0.getCardinality());
FieldPartitioner fp1 = fieldPartitioners.get(1);
Assert.assertEquals(HashFieldPartitioner.class, fp1.getClass());
Assert.assertEquals("username2_part", fp1.getName());
Assert.assertEquals(3, fp1.getCardinality());
Assert.assertEquals(expr, PartitionExpression.toExpression(strategy));
}
@Test
public void testMixedSubpartitionStrategy() {
String expr = "[year(\"timestamp\", \"year\"), minute(\"timestamp\", \"minute\")]";
PartitionExpression expression = new PartitionExpression(expr, true);
PartitionStrategy strategy = expression.evaluate();
List<FieldPartitioner> fieldPartitioners = strategy.getFieldPartitioners();
Assert.assertEquals(2, fieldPartitioners.size());
FieldPartitioner fp0 = fieldPartitioners.get(0);
Assert.assertEquals(YearFieldPartitioner.class, fp0.getClass());
Assert.assertEquals("timestamp", fp0.getSourceName());
Assert.assertEquals("year", fp0.getName());
FieldPartitioner fp1 = fieldPartitioners.get(1);
Assert.assertEquals(MinuteFieldPartitioner.class, fp1.getClass());
Assert.assertEquals("timestamp", fp1.getSourceName());
Assert.assertEquals("minute", fp1.getName());
Assert.assertEquals(expr, PartitionExpression.toExpression(strategy));
}
}