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/*
* Copyright 2014-2015 Open Networking Laboratory
*
* 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.
*/
package org.onosproject.codec.impl;
import com.fasterxml.jackson.databind.node.ObjectNode;
import org.onosproject.codec.CodecContext;
import org.onosproject.codec.JsonCodec;
import org.onosproject.net.Annotated;
import org.onosproject.net.Annotations;
import org.onosproject.net.DefaultAnnotations;
/**
* Base JSON codec for annotated entities.
*/
public abstract class AnnotatedCodec<T extends Annotated> extends JsonCodec<T> {
/**
* Adds JSON encoding of the given item annotations to the specified node.
*
* @param node node to add annotations to
* @param entity annotated entity
* @param context encode context
* @return the given node
*/
protected ObjectNode annotate(ObjectNode node, T entity, CodecContext context) {
if (!entity.annotations().keys().isEmpty()) {
JsonCodec<Annotations> codec = context.codec(Annotations.class);
node.set("annotations", codec.encode(entity.annotations(), context));
}
return node;
}
/**
* Extracts annotations of given Object.
*
* @param objNode annotated JSON object node
* @param context decode context
* @return extracted Annotations
*/
protected Annotations extractAnnotations(ObjectNode objNode, CodecContext context) {
JsonCodec<Annotations> codec = context.codec(Annotations.class);
if (objNode.has("annotations") && objNode.isObject()) {
return codec.decode(get(objNode, "annotations"), context);
} else {
return DefaultAnnotations.EMPTY;
}
}
}
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