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/*-
* ============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.apache.avro.util.Utf8;
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 Utf8 class to the Java String class.
*
* @author Liam Fallon (liam.fallon@ericsson.com)
*/
public class AvroStringObjectMapper implements AvroObjectMapper {
// Get a reference to the logger
private static final XLogger LOGGER = XLoggerFactory.getXLogger(AvroStringObjectMapper.class);
// The user keyAvro type for direct mapping
private AxKey userKey;
private Type avroType;
// The Apex compatible class
private final Class<String> schemaClass = String.class;
/*
* (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;
}
/*
* (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 for strings 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) {
// The Avro object should be a Utf8 object
if (!(avroObject instanceof Utf8)) {
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.toString();
}
/*
* (non-Javadoc)
*
* @see
* org.onap.policy.apex.plugins.context.schema.avro.AvroObjectMapper#mapToAvro(java.lang.Object)
*/
@Override
public Object mapToAvro(final Object object) {
if (object == null) {
final String returnString = userKey.getId() + ": cannot encode a null object of class \""
+ schemaClass.getCanonicalName() + "\"";
LOGGER.warn(returnString);
throw new ContextRuntimeException(returnString);
}
return object;
}
}
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