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/*
* Copyright (C) 2021 Samsung Electronics
* 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.onap.a1pesimulator.util;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.io.FileReader;
import java.io.IOException;
import java.net.URL;
import java.text.MessageFormat;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public enum JsonUtils {
INSTANCE;
private static final Logger log = LoggerFactory.getLogger(JsonUtils.class);
private ObjectMapper mapper;
private JsonUtils() {
this.mapper = new ObjectMapper().configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
}
public String objectToPrettyString(Object object) {
try {
return mapper.writerWithDefaultPrettyPrinter().writeValueAsString(object);
} catch (JsonProcessingException e) {
throw new JsonUtilsException("Cannot serialize object", e);
}
}
@SuppressWarnings("unchecked")
public <T> T clone(T object) {
String stringValue;
try {
stringValue = mapper.writeValueAsString(object);
return (T) mapper.readValue(stringValue, object.getClass());
} catch (JsonProcessingException e) {
throw new JsonUtilsException("Cannot clone object", e);
}
}
public <T> T deserializeFromFile(String fileName, Class<T> clazz) {
try {
return mapper.readValue(new FileReader(fileName), clazz);
} catch (IOException e) {
String errorMsg = MessageFormat.format("Could not deserialize from file: {0} into {1}", fileName,
clazz.getSimpleName());
log.error(errorMsg, e);
throw new JsonUtilsException(errorMsg, e);
}
}
public <T> T deserializeFromFileUrl(URL url, Class<T> clazz) {
try {
return mapper.readValue(url, clazz);
} catch (IOException e) {
String errorMsg = MessageFormat.format("Could not deserialize from file URL: {0} into {1}", url,
clazz.getSimpleName());
log.error(errorMsg, e);
throw new JsonUtilsException(errorMsg, e);
}
}
public <T> T deserialize(String string, Class<T> clazz) throws JsonUtilsException {
try {
return mapper.readValue(string, clazz);
} catch (IOException e) {
String errorMsg = MessageFormat
.format("Could not deserialize into {0} from object: {1}", clazz.getSimpleName(),
string);
log.error(errorMsg, e);
throw new JsonUtilsException(errorMsg, e);
}
}
public static class JsonUtilsException extends RuntimeException {
private static final long serialVersionUID = 1L;
public JsonUtilsException(String message, Throwable throwable) {
super(message, throwable);
}
}
}
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