2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2016-2018 Ericsson. All rights reserved.
4 * Modifications Copyright (C) 2019 Nordix Foundation.
5 * ================================================================================
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
18 * SPDX-License-Identifier: Apache-2.0
19 * ============LICENSE_END=========================================================
22 package org.onap.policy.apex.plugins.context.schema.avro;
24 import java.nio.ByteBuffer;
26 import org.apache.avro.Schema;
27 import org.apache.avro.Schema.Type;
28 import org.onap.policy.apex.context.ContextRuntimeException;
29 import org.onap.policy.apex.model.basicmodel.concepts.AxKey;
30 import org.slf4j.ext.XLogger;
31 import org.slf4j.ext.XLoggerFactory;
34 * This class does string mapping from the Avro BYTES type to a Java byte array.
36 * @author Liam Fallon (liam.fallon@ericsson.com)
38 public class AvroBytesObjectMapper implements AvroObjectMapper {
39 // Get a reference to the logger
40 private static final XLogger LOGGER = XLoggerFactory.getXLogger(AvroBytesObjectMapper.class);
42 // The user keyAvro type for direct mapping
43 private AxKey userKey;
44 private Type avroType;
46 // The Apex compatible class
47 private static final Class<Byte[]> schemaClass = Byte[].class;
53 public Class<?> getJavaClass() {
61 public void init(final AxKey intUserKey, final Type initAvroType) {
62 this.userKey = intUserKey;
63 this.avroType = initAvroType;
70 public Object createNewInstance(final Schema avroSchema) {
71 // By default, we do not create an instance, normal Java object creation for byte arrays is
80 public Type getAvroType() {
88 public Object mapFromAvro(final Object avroObject) {
89 // The Avro object should be a Utf8 object
90 if (!(avroObject instanceof ByteBuffer)) {
91 final String returnString = userKey.getId() + ": object \"" + avroObject + "\" of class \""
92 + avroObject.getClass() + "\" cannot be decoded to an object of class \""
93 + schemaClass.getName() + "\"";
94 LOGGER.warn(returnString);
95 throw new ContextRuntimeException(returnString);
98 // Cast the byte buffer object so we get access to its methods
99 final ByteBuffer byteBufferAvroObject = (ByteBuffer) avroObject;
101 // read the byte buffer into a byte array
102 final byte[] byteArray = new byte[byteBufferAvroObject.remaining()];
103 byteBufferAvroObject.get(byteArray);
112 public Object mapToAvro(final Object object) {
113 if (object == null) {
114 final String returnString = userKey.getId() + ": cannot encode a null object of class \""
115 + schemaClass.getName() + "\"";
116 LOGGER.warn(returnString);
117 throw new ContextRuntimeException(returnString);
120 // The incoming object should be a byte array
121 if (!(object instanceof byte[])) {
122 final String returnString = userKey.getId() + ": object \"" + object + "\" of class \"" + object.getClass()
123 + "\" cannot be decoded to an object of class \"" + schemaClass.getName() + "\"";
124 LOGGER.warn(returnString);
125 throw new ContextRuntimeException(returnString);
128 // Create a ByteBuffer object to serialize the bytes
129 return ByteBuffer.wrap((byte[]) object);