/*
* 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.ml.type;
import com.facebook.presto.spi.type.Type;
import com.facebook.presto.spi.type.TypeSignature;
import com.facebook.presto.spi.type.TypeSignatureParameter;
import com.google.common.collect.ImmutableList;
import java.util.List;
import static com.facebook.presto.spi.type.BigintType.BIGINT;
import static com.facebook.presto.spi.type.VarcharType.VARCHAR;
import static com.google.common.base.Preconditions.checkArgument;
// Layout is <size>:<model>, where
// size: is an int describing the length of the model bytes
// model: is the serialized model
public class ClassifierType
extends ModelType
{
public static final ClassifierType BIGINT_CLASSIFIER = new ClassifierType(BIGINT);
public static final ClassifierType VARCHAR_CLASSIFIER = new ClassifierType(VARCHAR);
private final Type labelType;
public ClassifierType(Type type)
{
super(new TypeSignature(ClassifierParametricType.NAME, TypeSignatureParameter.of(type.getTypeSignature())));
checkArgument(type.isComparable(), "type must be comparable");
labelType = type;
}
@Override
public List<Type> getTypeParameters()
{
return ImmutableList.of(labelType);
}
}