/
JsonUtils.java
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/
JsonUtils.java
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/**
* Copyright © 2014 - 2018 Leipzig University (Database Research Group)
*
* 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.gradoop.common.utils;
import org.apache.htrace.fasterxml.jackson.annotation.JsonInclude;
import org.apache.htrace.fasterxml.jackson.databind.DeserializationFeature;
import org.apache.htrace.fasterxml.jackson.databind.ObjectMapper;
import java.io.IOException;
/**
* json serialize utils
*/
public final class JsonUtils {
/**
* normal mapper
*/
private static final ObjectMapper MAPPER = new ObjectMapper();
static {
MAPPER.setSerializationInclusion(JsonInclude.Include.NON_NULL);
MAPPER.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
}
/**
* get common object mapper
*
* @return object mapper instance
*/
public static ObjectMapper getMapper() {
return MAPPER;
}
/**
* dumps object to json string
*
* @param obj object instance
* @return json string
*/
public static String dumps(Object obj) {
try {
return MAPPER.writeValueAsString(obj);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
/**
* load json string to instance
*
* @param src json string
* @param type object type
* @param <T> type template
* @return deserialize instance
*/
public static <T> T loads(String src, Class<T> type) {
try {
return MAPPER.readValue(src, type);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
/**
* load json bytes to instance
*
* @param src json bytes
* @param type object type
* @param <T> type template
* @return deserialize instance
*/
public static <T> T loads(byte[] src, Class<T> type) {
try {
return MAPPER.readValue(src, type);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}