--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. 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 org.apache.avro.Schema;
+import org.apache.avro.Schema.Type;
+
+import org.onap.policy.apex.model.basicmodel.concepts.ApexRuntimeException;
+import org.onap.policy.apex.model.basicmodel.concepts.AxKey;
+
+/**
+ * The Class AvroNullableMapper handles Avro null mappings to Java null values.
+ *
+ * @author John Keeney (john.keeney@ericsson.com)
+ */
+public class AvroNullableMapper extends AvroDirectObjectMapper {
+ // The wrapped mapper for nullables
+ private final AvroObjectMapper wrappedMapper;
+
+ /**
+ * The Constructor.
+ *
+ * @param wrappedMapper the wrapped mapper
+ */
+ public AvroNullableMapper(final AvroObjectMapper wrappedMapper) {
+ this.wrappedMapper = wrappedMapper;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.plugins.context.schema.avro.AvroDirectObjectMapper#getJavaClass()
+ */
+ @Override
+ public Class<?> getJavaClass() {
+ return wrappedMapper.getJavaClass();
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see
+ * org.onap.policy.apex.plugins.context.schema.avro.AvroDirectObjectMapper#init(org.onap.policy.
+ * apex. model.basicmodel.concepts.AxKey, org.apache.avro.Schema.Type)
+ */
+ @Override
+ public void init(final AxKey userKey, final Type avroType) {
+ wrappedMapper.init(userKey, avroType);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see
+ * org.onap.policy.apex.plugins.context.schema.avro.AvroDirectObjectMapper#createNewInstance(
+ * org. apache.avro.Schema)
+ */
+ @Override
+ public Object createNewInstance(final Schema avroSchema) {
+ return wrappedMapper.createNewInstance(avroSchema);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.plugins.context.schema.avro.AvroDirectObjectMapper#getAvroType()
+ */
+ @Override
+ public Type getAvroType() {
+ return Schema.Type.UNION;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see
+ * org.onap.policy.apex.plugins.context.schema.avro.AvroDirectObjectMapper#mapFromAvro(java.
+ * lang. Object)
+ */
+ @Override
+ public Object mapFromAvro(final Object avroObject) {
+ if (avroObject == null) {
+ return null;
+ } else {
+ return wrappedMapper.mapFromAvro(avroObject);
+ }
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see
+ * org.onap.policy.apex.plugins.context.schema.avro.AvroDirectObjectMapper#mapToAvro(java.lang.
+ * Object)
+ */
+ @Override
+ public Object mapToAvro(final Object object) {
+ if (object == null) {
+ return null;
+ } else {
+ throw new ApexRuntimeException("Unions/Nullable is not supported in output event ... Coming soon!");
+ }
+
+ }
+
+}