package com.thinkbiganalytics.feedmgr.rest.model.json;
/*-
* #%L
* thinkbig-feed-manager-rest-model
* %%
* Copyright (C) 2017 ThinkBig Analytics
* %%
* 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.
* #L%
*/
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.ObjectCodec;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
import com.thinkbiganalytics.feedmgr.rest.model.UserProperty;
import java.io.IOException;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
/**
* Deserializes a JSON array or object into a set of user-defined property objects.
*/
public class UserPropertyDeserializer extends StdDeserializer<Set<UserProperty>> {
/**
* Constructs a {@code UserPropertyDeserializer}.
*/
public UserPropertyDeserializer() {
super(Object.class);
}
@Override
public Set<UserProperty> deserialize(final JsonParser p, final DeserializationContext ctxt) throws IOException {
final ObjectCodec codec = (p.getCodec() != null) ? p.getCodec() : new ObjectMapper();
final JsonNode node = codec.readTree(p);
final Set<UserProperty> userProperties;
if (node.isArray()) {
userProperties = new HashSet<>(node.size());
for (final JsonNode child : node) {
userProperties.add(codec.treeToValue(child, UserProperty.class));
}
} else if (node.isObject()) {
final Iterator<Map.Entry<String, JsonNode>> iter = node.fields();
userProperties = new HashSet<>(node.size());
while (iter.hasNext()) {
final Map.Entry<String, JsonNode> element = iter.next();
final UserProperty userProperty = new UserProperty();
userProperty.setSystemName(element.getKey());
userProperty.setValue(element.getValue().asText());
userProperties.add(userProperty);
}
} else {
throw new JsonParseException("Unsupported user property node: " + node, p.getCurrentLocation());
}
return userProperties;
}
}