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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.dubbo.common.json.impl;
import java.lang.reflect.Type;
import java.util.List;
import org.apache.dubbo.common.utils.ClassUtils;
import com.fasterxml.jackson.annotation.JsonInclude.Include;
import com.fasterxml.jackson.databind.MapperFeature;
import com.fasterxml.jackson.databind.json.JsonMapper;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
public class JacksonImpl extends AbstractJSONImpl {
private volatile Object jacksonCache = null;
@Override
public boolean isSupport() {
try {
Class aClass = ClassUtils.forName("com.fasterxml.jackson.databind.json.JsonMapper");
return aClass != null;
} catch (Throwable t) {
return false;
}
}
@Override
public T toJavaObject(String json, Type type) {
try {
return getJackson().readValue(json, getJackson().getTypeFactory().constructType(type));
} catch (com.fasterxml.jackson.core.JsonProcessingException e) {
throw new IllegalArgumentException(e);
}
}
@Override
public List toJavaList(String json, Class clazz) {
try {
return getJackson().readValue(json, getJackson().getTypeFactory().constructCollectionType(List.class, clazz));
} catch (com.fasterxml.jackson.core.JsonProcessingException e) {
throw new IllegalArgumentException(e);
}
}
@Override
public String toJson(Object obj) {
try {
return getJackson().writeValueAsString(obj);
} catch (com.fasterxml.jackson.core.JsonProcessingException e) {
throw new IllegalArgumentException(e);
}
}
private JsonMapper getJackson() {
if (jacksonCache == null || !(jacksonCache instanceof JsonMapper)) {
synchronized (this) {
if (jacksonCache == null || !(jacksonCache instanceof JsonMapper)) {
jacksonCache = JsonMapper.builder()
.configure(MapperFeature.PROPAGATE_TRANSIENT_MARKER, true)
.serializationInclusion(Include.NON_NULL)
.addModule(new JavaTimeModule())
.build();
}
}
}
return (JsonMapper) jacksonCache;
}
}