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/*-
* ============LICENSE_START=======================================================
* SDC
* ================================================================================
* 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.sdc.be.dao.jsongraph.utils;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.google.common.base.Strings;
import org.openecomp.sdc.be.datatypes.tosca.ToscaDataDefinition;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.util.Map;
public class JsonParserUtils {
private static final Logger log = LoggerFactory.getLogger(JsonParserUtils.class.getName());
private static final ObjectMapper mapper = buildObjectMapper();
private JsonParserUtils() {
// No instances allowed
}
private static ObjectMapper buildObjectMapper() {
return new ObjectMapper()
.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES)
.disable(SerializationFeature.FAIL_ON_EMPTY_BEANS)
.setSerializationInclusion(JsonInclude.Include.NON_NULL);
}
public static <T> String toJson(T object) throws IOException {
return mapper.writer()
.writeValueAsString(object);
}
public static Map<String, Object> toMap(String json) {
if (Strings.isNullOrEmpty(json)) {
return null;
}
Map<String, Object> object = null;
try {
TypeReference<Map<String, Object>> typeRef = new TypeReference<Map<String, Object>>() {
};
object = mapper.readerFor(typeRef)
.readValue(json);
}
catch (Exception e) {
log.debug("Failed to parse json {}", json, e);
}
return object;
}
public static <T extends ToscaDataDefinition> Map<String, T> toMap(String json, Class<T> clazz) {
if (Strings.isNullOrEmpty(json)) {
return null;
}
Map<String, T> object = null;
try {
JavaType type = mapper.getTypeFactory()
.constructMapType(Map.class, String.class, clazz);
object = mapper.readerFor(type)
.readValue(json);
}
catch (Exception e) {
log.debug("Failed to parse json {}", json, e);
}
return object;
}
}
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