/**
* 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.avro.io;
import java.io.IOException;
import org.apache.avro.Schema;
/** Read data of a schema.
* <p>Determines the in-memory data representation.
*/
public interface DatumReader<D> {
/** Set the writer's schema. */
void setSchema(Schema schema);
/** Read a datum. Traverse the schema, depth-first, reading all leaf values
* in the schema into a datum that is returned. If the provided datum is
* non-null it may be reused and returned. */
D read(D reuse, Decoder in) throws IOException;
}