org.apache.druid.frame.write.FrameWriterFactory Maven / Gradle / Ivy
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A module that is everything required to understands Druid Segments
/*
* 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.druid.frame.write;
import org.apache.druid.frame.FrameType;
import org.apache.druid.segment.ColumnSelectorFactory;
import org.apache.druid.segment.column.RowSignature;
/**
* Interface for creating {@link FrameWriter}.
*/
public interface FrameWriterFactory
{
/**
* Create a writer where {@link FrameWriter#addSelection()} adds the current row from a {@link ColumnSelectorFactory}.
*/
FrameWriter newFrameWriter(ColumnSelectorFactory columnSelectorFactory);
long allocatorCapacity();
RowSignature signature();
FrameType frameType();
}