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/*-
* ============LICENSE_START=======================================================
* ONAP - SO
* ================================================================================
* Copyright (C) 2017 AT&T 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.openecomp.mso.adapters.json;
import org.codehaus.jackson.JsonNode;
import org.codehaus.jackson.JsonParser;
import org.codehaus.jackson.JsonProcessingException;
import org.codehaus.jackson.map.DeserializationContext;
import org.codehaus.jackson.map.JsonDeserializer;
import org.codehaus.jackson.map.ObjectMapper;
import java.io.IOException;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
/**
* Custom JSON Deserializer for Map<String, String>.
* In MSO with Jackson 1.9.12 and RestEasy 3.0.8, maps in JSON are serialized as
* follows:
* <pre>
* "params": {
* "entry": [
* {"key": "P1", "value": "V1"},
* {"key": "P2", "value": "V2"},
* ...
* {"key": "PN", "value": "VN"}
* ]
* }
* The implementation uses a LinkedHashMap to preserve the ordering of entries.
* </pre>
*/
public class MapDeserializer extends JsonDeserializer<Map<String, String>> {
@Override
public Map<String, String> deserialize(JsonParser parser,
DeserializationContext context) throws IOException,
JsonProcessingException {
ObjectMapper mapper = new ObjectMapper();
JsonNode tree = mapper.readTree(parser);
Map<String, String> map = new LinkedHashMap<>();
Iterator<JsonNode> iterator = tree.iterator();
while (iterator.hasNext()) {
JsonNode element = iterator.next();
Iterator<JsonNode> arrayIterator = element.iterator();
while (arrayIterator.hasNext()) {
JsonNode arrayElement = arrayIterator.next();
String key = arrayElement.get("key").getTextValue();
String value = arrayElement.get("value").getTextValue();
map.put(key, value);
}
}
return map;
}
}
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