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/*
* ============LICENSE_START=======================================================
* ONAP : ccsdk features
* ================================================================================
* Copyright (C) 2020 highstreet technologies GmbH 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.
* ============LICENSE_END=========================================================
*
*/
package org.onap.ccsdk.features.sdnr.wt.dataprovider.yangtools.serialize;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.JsonDeserializer;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.NoSuchElementException;
import java.util.Optional;
import org.onap.ccsdk.features.sdnr.wt.dataprovider.yangtools.YangToolsMapperHelper;
import org.opendaylight.yangtools.concepts.Builder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class TypeObjectDeserializer<T> extends JsonDeserializer<T> {
private static final Logger LOG = LoggerFactory.getLogger(TypeObjectDeserializer.class);
private final JavaType type;
private final JsonDeserializer<?> deser;
public TypeObjectDeserializer(final JavaType type, final JsonDeserializer<?> deser) {
this.type = type;
this.deser = deser;
}
@SuppressWarnings("unchecked")
@Override
public T deserialize(JsonParser parser, DeserializationContext ctxt) throws IOException, JsonProcessingException {
Class<T> clazz = (Class<T>) type.getRawClass();
final String arg = parser.getValueAsString();
LOG.debug("Try to build arg:'{}' with class {}",arg, clazz);
Optional<T> oRes = Optional.empty();
try {
//try get method for default instance
if ((oRes = YangToolsMapperHelper.getDefaultInstance(clazz, arg)).isEmpty()) {
//try to find builder with getDefaultInstance method
Optional<Class<Builder<?>>> oBuilderClazz = YangToolsMapperHelper.findBuilderClassOptional(ctxt, clazz);
LOG.debug("Try builder class present:{}",oBuilderClazz.isPresent());
if (oBuilderClazz.isEmpty()
|| ((oRes = YangToolsMapperHelper.getDefaultInstance(oBuilderClazz.get(), arg)).isEmpty())) {
//try to find constructor with string
LOG.debug("Try constructor");
if ((oRes = YangToolsMapperHelper.getInstanceByConstructor(clazz, arg)).isEmpty()) {
//forward to standard deserializer or throw if not available
LOG.debug("Try default deserializer");
oRes = Optional.of((T) deser.deserialize(parser, ctxt));
}
}
}
LOG.debug("Deserialize string value:{} for class:{} success:{}", arg, clazz, oRes.isPresent());
} catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException | NoSuchMethodException
| NoSuchElementException | SecurityException | InstantiationException e) {
LOG.warn("problem deserializing {} with value {}: {}", clazz.getName(), arg, e);
}
if (oRes.isPresent()) {
return oRes.get();
} else {
throw new IllegalArgumentException("Could not find constructor for arg:'" + arg + "' and class: " + clazz);
}
}
}
|
