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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2016-2018 Ericsson. All rights reserved.
* Modifications Copyright (C) 2019-2021 Nordix Foundation.
* Modifications Copyright (C) 2021 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.policy.apex.plugins.context.schema.avro;
import java.nio.ByteBuffer;
import lombok.Getter;
import org.apache.avro.Schema;
import org.apache.avro.Schema.Type;
import org.onap.policy.apex.context.ContextRuntimeException;
import org.onap.policy.apex.model.basicmodel.concepts.AxKey;
import org.slf4j.ext.XLogger;
import org.slf4j.ext.XLoggerFactory;
/**
* This class does string mapping from the Avro BYTES type to a Java byte array.
*
* @author Liam Fallon (liam.fallon@ericsson.com)
*/
public class AvroBytesObjectMapper implements AvroObjectMapper {
// Get a reference to the logger
private static final XLogger LOGGER = XLoggerFactory.getXLogger(AvroBytesObjectMapper.class);
// The user keyAvro type for direct mapping
private AxKey userKey;
@Getter
private Type avroType;
// The Apex compatible class
private static final Class<Byte[]> schemaClass = Byte[].class;
/**
* {@inheritDoc}.
*/
@Override
public Class<?> getJavaClass() {
return schemaClass;
}
/**
* {@inheritDoc}.
*/
@Override
public void init(final AxKey intUserKey, final Type initAvroType) {
this.userKey = intUserKey;
this.avroType = initAvroType;
}
/**
* {@inheritDoc}.
*/
@Override
public Object createNewInstance(final Schema avroSchema) {
// By default, we do not create an instance, normal Java object creation for byte arrays is
// sufficient
return null;
}
/**
* {@inheritDoc}.
*/
@Override
public Object mapFromAvro(final Object avroObject) {
// The Avro object should be a Utf8 object
if (!(avroObject instanceof ByteBuffer)) {
final var returnString = userKey.getId() + ": object \"" + avroObject + "\" of class \""
+ avroObject.getClass() + "\" cannot be decoded to an object of class \""
+ schemaClass.getName() + "\"";
LOGGER.warn(returnString);
throw new ContextRuntimeException(returnString);
}
// Cast the byte buffer object so we get access to its methods
final var byteBufferAvroObject = (ByteBuffer) avroObject;
// read the byte buffer into a byte array
final var byteArray = new byte[byteBufferAvroObject.remaining()];
byteBufferAvroObject.get(byteArray);
return byteArray;
}
/**
* {@inheritDoc}.
*/
@Override
public Object mapToAvro(final Object object) {
if (object == null) {
final var returnString = userKey.getId() + ": cannot encode a null object of class \""
+ schemaClass.getName() + "\"";
LOGGER.warn(returnString);
throw new ContextRuntimeException(returnString);
}
// The incoming object should be a byte array
if (!(object instanceof byte[])) {
final var returnString = userKey.getId() + ": object \"" + object + "\" of class \"" + object.getClass()
+ "\" cannot be decoded to an object of class \"" + schemaClass.getName() + "\"";
LOGGER.warn(returnString);
throw new ContextRuntimeException(returnString);
}
// Create a ByteBuffer object to serialize the bytes
return ByteBuffer.wrap((byte[]) object);
}
}
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