io.cdap.wrangler.codec.AbstractAvroDecoder Maven / Gradle / Ivy
/*
* Copyright © 2017-2019 Cask Data, Inc.
*
* 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.cdap.wrangler.codec;
import io.cdap.wrangler.api.Row;
import org.apache.avro.Schema;
import org.apache.avro.generic.GenericDatumReader;
import org.apache.avro.generic.GenericRecord;
import org.apache.avro.io.DatumReader;
/**
* This class {@link AbstractAvroDecoder} is implementation of {@link Decoder} interface using type {@link Row}.
* All implementations of AVRO decoder should extend from this class.
*/
public abstract class AbstractAvroDecoder implements Decoder {
// Schema associated with record or data file being read.
private final Schema schema;
// Reader for reading data based on the schema.
private final DatumReader reader;
protected AbstractAvroDecoder(Schema schema) {
this.schema = schema;
this.reader = new GenericDatumReader<>(this.schema);
}
protected Schema getSchema() {
return schema;
}
protected DatumReader getReader() {
return reader;
}
}