/**
* 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.hadoop.zebra.io;
import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import junit.framework.Assert;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.LocalFileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.RawLocalFileSystem;
import org.apache.hadoop.io.BytesWritable;
import org.apache.hadoop.zebra.io.BasicTable;
import org.apache.hadoop.zebra.io.TableInserter;
import org.apache.hadoop.zebra.io.TableScanner;
import org.apache.hadoop.zebra.io.BasicTable.Reader.RangeSplit;
import org.apache.hadoop.zebra.parser.ParseException;
import org.apache.hadoop.zebra.schema.Schema;
import org.apache.hadoop.zebra.types.TypesUtils;
import org.apache.pig.data.DataBag;
import org.apache.pig.data.DataByteArray;
import org.apache.pig.data.Tuple;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
/**
*
* Test conventions for column names. Specifically, '_' is allowed as leading character for map keys,
* but it's disallowed for other fields.
*
*/
public class TestColumnName {
final static String STR_SCHEMA =
"f1:bool, r:record(f11:int, f12:long), m:map(string), c:collection(record(f13:double, f14:double, f15:bytes))";
final static String STR_STORAGE = "[r.f12, f1, m#{b}]; [m#{_a}, r.f11]";
final static String INVALID_STR_SCHEMA =
"_f1:bool, _r:record(f11:int, _f12:long), _m:map(string), _c:collection(record(_f13:double, _f14:double, _f15:bytes))";
final static String INVALID_STR_STORAGE = "[_r.f12, _f1, _m#{b}]; [_m#{_a}, _r.f11]";
private static Configuration conf = new Configuration();
private static FileSystem fs = new LocalFileSystem( new RawLocalFileSystem() );
private static Path path = new Path( fs.getWorkingDirectory(), "TestColumnName" );
static {
conf.setInt("table.output.tfile.minBlock.size", 64 * 1024);
conf.setInt("table.input.split.minSize", 64 * 1024);
conf.set("table.output.tfile.compression", "none");
}
@BeforeClass
public static void setUp() throws IOException {
// drop any previous tables
BasicTable.drop( path, conf );
BasicTable.Writer writer = new BasicTable.Writer( path, STR_SCHEMA, STR_STORAGE, conf );
writer.finish();
Schema schema = writer.getSchema();
Tuple tuple = TypesUtils.createTuple( schema );
BasicTable.Writer writer1 = new BasicTable.Writer(path, conf);
int part = 0;
TableInserter inserter = writer1.getInserter("part" + part, true);
TypesUtils.resetTuple(tuple);
tuple.set(0, true);
Tuple tupRecord;
try {
tupRecord = TypesUtils.createTuple(schema.getColumnSchema("r")
.getSchema());
} catch (ParseException e) {
e.printStackTrace();
throw new IOException(e);
}
tupRecord.set(0, 1);
tupRecord.set(1, 1001L);
tuple.set(1, tupRecord);
Map<String, String> map = new HashMap<String, String>();
map.put("_a", "x");
map.put("b", "y");
map.put("c", "z");
tuple.set(2, map);
DataBag bagColl = TypesUtils.createBag();
Schema schColl = schema.getColumn(3).getSchema().getColumn(0).getSchema();
Tuple tupColl1 = TypesUtils.createTuple(schColl);
Tuple tupColl2 = TypesUtils.createTuple(schColl);
byte[] abs1 = new byte[3];
byte[] abs2 = new byte[4];
tupColl1.set(0, 3.1415926);
tupColl1.set(1, 1.6);
abs1[0] = 11;
abs1[1] = 12;
abs1[2] = 13;
tupColl1.set(2, new DataByteArray(abs1));
bagColl.add(tupColl1);
tupColl2.set(0, 123.456789);
tupColl2.set(1, 100);
abs2[0] = 21;
abs2[1] = 22;
abs2[2] = 23;
abs2[3] = 24;
tupColl2.set(2, new DataByteArray(abs2));
bagColl.add(tupColl2);
tuple.set(3, bagColl);
int row = 0;
inserter.insert(new BytesWritable(String.format("k%d%d", part + 1, row + 1)
.getBytes()), tuple);
inserter.close();
writer1.finish();
writer.close();
}
@AfterClass
public static void tearDownOnce() throws IOException {
}
@Test
public void testInvalidCase() throws IOException {
Path p = new Path( fs.getWorkingDirectory(), "TestColumnNameInvalid" );
BasicTable.drop( p, conf );
try {
BasicTable.Writer writer = new BasicTable.Writer( p, INVALID_STR_SCHEMA, INVALID_STR_STORAGE, conf );
writer.finish();
} catch(IOException ex) {
// Do nothing. This is expected.
return;
}
Assert.assertTrue( false ); // Test failure.
}
@Test
public void testRead() throws IOException, ParseException {
String projection = new String("f1, m#{_a|b}, r, m#{c}");
BasicTable.Reader reader = new BasicTable.Reader(path, conf);
reader.setProjection(projection);
// long totalBytes = reader.getStatus().getSize();
List<RangeSplit> splits = reader.rangeSplit(1);
reader.close();
reader = new BasicTable.Reader(path, conf);
reader.setProjection(projection);
TableScanner scanner = reader.getScanner(splits.get(0), true);
BytesWritable key = new BytesWritable();
Tuple value = TypesUtils.createTuple(scanner.getSchema());
scanner.getKey(key);
Assert.assertEquals(key, new BytesWritable("k11".getBytes()));
scanner.getValue(value);
Tuple recordTuple = (Tuple) value.get(2);
Assert.assertEquals(1, recordTuple.get(0));
Assert.assertEquals(1001L, recordTuple.get(1));
Assert.assertEquals(true, value.get(0));
HashMap<String, Object> mapval = (HashMap<String, Object>) value.get(1);
Assert.assertEquals("x", mapval.get("_a"));
Assert.assertEquals("y", mapval.get("b"));
Assert.assertEquals(null, mapval.get("c"));
mapval = (HashMap<String, Object>) value.get(3);
Assert.assertEquals("z", mapval.get("c"));
Assert.assertEquals(null, mapval.get("_a"));
Assert.assertEquals(null, mapval.get("b"));
reader.close();
}
@Test
public void testProjectionParsing() throws IOException, ParseException {
String projection = new String( "f1, m#{_a}, _r, m#{c}, m" );
BasicTable.Reader reader = new BasicTable.Reader( path, conf );
try {
reader.setProjection( projection );
reader.close();
} catch(ParseException ex) {
// Expected.
return;
}
Assert.assertTrue( false );
}
}