--- /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 java.util.HashMap;
+import java.util.Map;
+import java.util.TreeMap;
+
+import org.apache.avro.Schema;
+import org.apache.avro.Schema.Type;
+import org.apache.avro.generic.GenericData;
+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 direct mapping from Avro classes to Java classes, used for Avro primitive types
+ * that directly produce Java objects.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class AvroDirectObjectMapper implements AvroObjectMapper {
+ // Get a reference to the logger
+ private static final XLogger LOGGER = XLoggerFactory.getXLogger(AvroDirectObjectMapper.class);
+
+ // Map for Avro primitive types to Java primitive types
+ private static final Map<Schema.Type, Class<?>> AVRO_JAVA_TYPE_MAP = new TreeMap<>();
+
+ // @formatter:off
+ // Initialize the mapping
+ static {
+ AVRO_JAVA_TYPE_MAP.put(Schema.Type.ARRAY, GenericData.Array.class);
+ AVRO_JAVA_TYPE_MAP.put(Schema.Type.BOOLEAN, Boolean.class);
+ AVRO_JAVA_TYPE_MAP.put(Schema.Type.DOUBLE, Double.class);
+ AVRO_JAVA_TYPE_MAP.put(Schema.Type.ENUM, GenericData.EnumSymbol.class);
+ AVRO_JAVA_TYPE_MAP.put(Schema.Type.FIXED, GenericData.Fixed.class);
+ AVRO_JAVA_TYPE_MAP.put(Schema.Type.FLOAT, Float.class);
+ AVRO_JAVA_TYPE_MAP.put(Schema.Type.INT, Integer.class);
+ AVRO_JAVA_TYPE_MAP.put(Schema.Type.LONG, Long.class);
+ AVRO_JAVA_TYPE_MAP.put(Schema.Type.MAP, HashMap.class);
+ AVRO_JAVA_TYPE_MAP.put(Schema.Type.NULL, null);
+ AVRO_JAVA_TYPE_MAP.put(Schema.Type.RECORD, GenericData.Record.class);
+ }
+ // @formatter:on
+
+ // The user keyAvro type for direct mapping
+ private AxKey userKey;
+ private Type avroType;
+
+ // The Apex compatible class
+ private Class<?> schemaClass;
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.plugins.context.schema.avro.AvroObjectMapper#getJavaClass()
+ */
+ @Override
+ public Class<?> getJavaClass() {
+ return schemaClass;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see
+ * org.onap.policy.apex.plugins.context.schema.avro.AvroObjectMapper#setAvroType(org.apache.
+ * avro. Schema.Type)
+ */
+ @Override
+ public void init(final AxKey initUserKey, final Type initAvroType) {
+ this.userKey = initUserKey;
+ this.avroType = initAvroType;
+ schemaClass = AVRO_JAVA_TYPE_MAP.get(avroType);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.plugins.context.schema.avro.AvroObjectMapper#createNewinstance(org.
+ * apache. avro.Schema)
+ */
+ @Override
+ public Object createNewInstance(final Schema avroSchema) {
+ // By default, we do not create an instance, normal Java object creation is sufficient
+ return null;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.plugins.context.schema.avro.AvroObjectMapper#getAvroType()
+ */
+ @Override
+ public Type getAvroType() {
+ return avroType;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see org.onap.policy.apex.plugins.context.schema.avro.AvroObjectMapper#mapFromAvro(java.lang.
+ * Object)
+ */
+ @Override
+ public Object mapFromAvro(final Object avroObject) {
+ // Always return null if the schema is a null schema
+ if (schemaClass == null) {
+ return null;
+ }
+
+ // It is legal for the schema class to be null, if the Avro schema has a "null" type then
+ // the decoded object is always returned as a null
+ if (!schemaClass.isAssignableFrom(avroObject.getClass())) {
+ final String returnString =
+ userKey.getID() + ": object \"" + avroObject + "\" of class \"" + avroObject.getClass()
+ + "\" cannot be decoded to an object of class \"" + schemaClass.getCanonicalName() + "\"";
+ LOGGER.warn(returnString);
+ throw new ContextRuntimeException(returnString);
+ }
+
+ return avroObject;
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see
+ * org.onap.policy.apex.plugins.context.schema.avro.AvroObjectMapper#mapToAvro(java.lang.Object)
+ */
+ @Override
+ public Object mapToAvro(final Object object) {
+ // Null values are only allowed if the schema class is null
+ if (object == null) {
+ if (schemaClass != null) {
+ final String returnString = userKey.getID() + ": cannot encode a null object of class \""
+ + schemaClass.getCanonicalName() + "\"";
+ LOGGER.warn(returnString);
+ throw new ContextRuntimeException(returnString);
+ }
+ }
+
+ // For direct mappings, just work directly with the Java objects
+ return object;
+ }
+}
Code Review / policy / apex-pdp.git / blobdiff