/*
* 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;
import com.facebook.presto.spi.PrestoException;
import com.facebook.presto.spi.type.CharType;
import com.facebook.presto.spi.type.DecimalType;
import com.facebook.presto.spi.type.Type;
import com.facebook.presto.spi.type.VarcharType;
import java.util.List;
import static com.facebook.presto.spi.StandardErrorCode.NOT_SUPPORTED;
import static com.facebook.presto.spi.type.BigintType.BIGINT;
import static com.facebook.presto.spi.type.BooleanType.BOOLEAN;
import static com.facebook.presto.spi.type.DateType.DATE;
import static com.facebook.presto.spi.type.DoubleType.DOUBLE;
import static com.facebook.presto.spi.type.IntegerType.INTEGER;
import static com.facebook.presto.spi.type.RealType.REAL;
import static com.facebook.presto.spi.type.SmallintType.SMALLINT;
import static com.facebook.presto.spi.type.StandardTypes.ARRAY;
import static com.facebook.presto.spi.type.StandardTypes.MAP;
import static com.facebook.presto.spi.type.StandardTypes.ROW;
import static com.facebook.presto.spi.type.TimestampType.TIMESTAMP;
import static com.facebook.presto.spi.type.TinyintType.TINYINT;
import static com.facebook.presto.spi.type.VarbinaryType.VARBINARY;
import static java.util.stream.Collectors.toList;
public interface RcFileEncoding
{
ColumnEncoding booleanEncoding(Type type);
ColumnEncoding byteEncoding(Type type);
ColumnEncoding shortEncoding(Type type);
ColumnEncoding intEncoding(Type type);
ColumnEncoding longEncoding(Type type);
ColumnEncoding decimalEncoding(Type type);
ColumnEncoding floatEncoding(Type type);
ColumnEncoding doubleEncoding(Type type);
ColumnEncoding stringEncoding(Type type);
ColumnEncoding binaryEncoding(Type type);
ColumnEncoding dateEncoding(Type type);
ColumnEncoding timestampEncoding(Type type);
ColumnEncoding listEncoding(Type type, ColumnEncoding elementEncoding);
ColumnEncoding mapEncoding(Type type, ColumnEncoding keyEncoding, ColumnEncoding valueEncoding);
ColumnEncoding structEncoding(Type type, List<ColumnEncoding> fieldEncodings);
default ColumnEncoding getEncoding(Type type)
{
if (BOOLEAN.equals(type)) {
return booleanEncoding(type);
}
if (TINYINT.equals(type)) {
return byteEncoding(type);
}
if (SMALLINT.equals(type)) {
return shortEncoding(type);
}
if (INTEGER.equals(type)) {
return intEncoding(type);
}
if (BIGINT.equals(type)) {
return longEncoding(type);
}
if (type instanceof DecimalType) {
return decimalEncoding(type);
}
if (REAL.equals(type)) {
return floatEncoding(type);
}
if (DOUBLE.equals(type)) {
return doubleEncoding(type);
}
if (type instanceof VarcharType || type instanceof CharType) {
return stringEncoding(type);
}
if (VARBINARY.equals(type)) {
return binaryEncoding(type);
}
if (DATE.equals(type)) {
return dateEncoding(type);
}
if (TIMESTAMP.equals(type)) {
return timestampEncoding(type);
}
String baseType = type.getTypeSignature().getBase();
if (ARRAY.equals(baseType)) {
ColumnEncoding elementType = getEncoding(type.getTypeParameters().get(0));
return listEncoding(type, elementType);
}
if (MAP.equals(baseType)) {
ColumnEncoding keyType = getEncoding(type.getTypeParameters().get(0));
ColumnEncoding valueType = getEncoding(type.getTypeParameters().get(1));
return mapEncoding(type, keyType, valueType);
}
if (ROW.equals(baseType)) {
return structEncoding(
type,
type.getTypeParameters().stream()
.map(this::getEncoding)
.collect(toList()));
}
throw new PrestoException(NOT_SUPPORTED, "unsupported type: " + type);
}
}