io.trino.hive.formats.line.LineDeserializer Maven / Gradle / Ivy
/*
* 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 io.trino.hive.formats.line;
import com.google.common.collect.ImmutableList;
import io.trino.spi.PageBuilder;
import io.trino.spi.type.Type;
import java.io.IOException;
import java.util.List;
public interface LineDeserializer
{
LineDeserializer EMPTY_LINE_DESERIALIZER = new LineDeserializer() {
@Override
public List getTypes()
{
return ImmutableList.of();
}
@Override
public void deserialize(LineBuffer lineBuffer, PageBuilder builder)
{
builder.declarePosition();
}
};
/**
* Required types for the deserialize page builder.
*/
List getTypes();
/**
* Deserialize the line into the page builder. The implementation will
* declare the added positions in the page builder. The implementation
* is allowed to add zero or more positions to the builder.
*
* @param lineBuffer the line which may be empty
* @param builder page builder for the declared types
*
* @throws IOException if line can not be decoded and processing should stop
* @throws RuntimeException if line can not be decoded and processing should stop
*/
void deserialize(LineBuffer lineBuffer, PageBuilder builder)
throws IOException;
}