org.apache.parquet.io.api.GroupConverter Maven / Gradle / Ivy
/*
* 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.parquet.io.api;
/**
* converter for group nodes
*/
abstract public class GroupConverter extends Converter {
@Override
public boolean isPrimitive() {
return false;
}
@Override
public GroupConverter asGroupConverter() {
return this;
}
/**
* called at initialization based on schema
* must consistently return the same object
* @param fieldIndex index of the field in this group
* @return the corresponding converter
*/
abstract public Converter getConverter(int fieldIndex);
/** runtime calls **/
/** called at the beginning of the group managed by this converter */
abstract public void start();
/**
* call at the end of the group
*/
abstract public void end();
}