/*
* 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.facebook.presto.rcfile.text;
import com.facebook.presto.rcfile.ColumnData;
import com.facebook.presto.rcfile.EncodeOutput;
import com.facebook.presto.spi.block.Block;
import com.facebook.presto.spi.block.BlockBuilder;
import com.facebook.presto.spi.block.BlockBuilderStatus;
import com.facebook.presto.spi.type.Type;
import com.google.common.base.Throwables;
import io.airlift.slice.Slice;
import io.airlift.slice.SliceOutput;
import org.joda.time.DateTimeZone;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;
import org.joda.time.format.DateTimeFormatterBuilder;
import org.joda.time.format.DateTimeParser;
import org.joda.time.format.DateTimePrinter;
import java.io.IOException;
public class TimestampEncoding
implements TextColumnEncoding
{
private static final DateTimeFormatter HIVE_TIMESTAMP_PARSER;
private final DateTimeFormatter dateTimeFormatter;
static {
@SuppressWarnings("SpellCheckingInspection")
DateTimeParser[] timestampWithoutTimeZoneParser = {
DateTimeFormat.forPattern("yyyy-M-d").getParser(),
DateTimeFormat.forPattern("yyyy-M-d H:m").getParser(),
DateTimeFormat.forPattern("yyyy-M-d H:m:s").getParser(),
DateTimeFormat.forPattern("yyyy-M-d H:m:s.SSS").getParser(),
DateTimeFormat.forPattern("yyyy-M-d H:m:s.SSSSSSS").getParser(),
DateTimeFormat.forPattern("yyyy-M-d H:m:s.SSSSSSSSS").getParser(),
};
@SuppressWarnings("SpellCheckingInspection")
DateTimePrinter timestampWithoutTimeZonePrinter = DateTimeFormat.forPattern("yyyy-MM-dd HH:mm:ss.SSSSSSSSS").getPrinter();
HIVE_TIMESTAMP_PARSER = new DateTimeFormatterBuilder().append(timestampWithoutTimeZonePrinter, timestampWithoutTimeZoneParser).toFormatter().withZoneUTC();
}
private final Type type;
private final Slice nullSequence;
private final StringBuilder buffer = new StringBuilder();
public TimestampEncoding(Type type, Slice nullSequence, DateTimeZone hiveStorageTimeZone)
{
this.type = type;
this.nullSequence = nullSequence;
this.dateTimeFormatter = HIVE_TIMESTAMP_PARSER.withZone(hiveStorageTimeZone);
}
@Override
public void encodeColumn(Block block, SliceOutput output, EncodeOutput encodeOutput)
{
try {
for (int position = 0; position < block.getPositionCount(); position++) {
if (block.isNull(position)) {
output.writeBytes(nullSequence);
}
else {
long millis = type.getLong(block, position);
buffer.setLength(0);
dateTimeFormatter.printTo(buffer, millis);
for (int index = 0; index < buffer.length(); index++) {
output.writeByte(buffer.charAt(index));
}
}
encodeOutput.closeEntry();
}
}
catch (IOException e) {
throw Throwables.propagate(e);
}
}
@Override
public void encodeValueInto(int depth, Block block, int position, SliceOutput output)
{
try {
long millis = type.getLong(block, position);
buffer.setLength(0);
dateTimeFormatter.printTo(buffer, millis);
for (int index = 0; index < buffer.length(); index++) {
output.writeByte(buffer.charAt(index));
}
}
catch (IOException e) {
throw Throwables.propagate(e);
}
}
@Override
public Block decodeColumn(ColumnData columnData)
{
int size = columnData.rowCount();
BlockBuilder builder = type.createBlockBuilder(new BlockBuilderStatus(), size);
Slice slice = columnData.getSlice();
for (int i = 0; i < size; i++) {
int offset = columnData.getOffset(i);
int length = columnData.getLength(i);
if (length == 0 || nullSequence.equals(0, nullSequence.length(), slice, offset, length)) {
builder.appendNull();
}
else {
type.writeLong(builder, parseTimestamp(slice, offset, length));
}
}
return builder.build();
}
@Override
public void decodeValueInto(int depth, BlockBuilder builder, Slice slice, int offset, int length)
{
long millis = parseTimestamp(slice, offset, length);
type.writeLong(builder, millis);
}
private long parseTimestamp(Slice slice, int offset, int length)
{
//noinspection deprecation
return dateTimeFormatter.parseMillis(new String(slice.getBytes(offset, length), 0));
}
}