org.dromara.hutool.json.engine.FastJSON2Engine Maven / Gradle / Ivy
/*
* Copyright (c) 2013-2024 Hutool Team and hutool.cn
*
* 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.dromara.hutool.json.engine;
import com.alibaba.fastjson2.JSONFactory;
import com.alibaba.fastjson2.JSONReader;
import com.alibaba.fastjson2.JSONWriter;
import com.alibaba.fastjson2.reader.ObjectReader;
import com.alibaba.fastjson2.writer.ObjectWriter;
import org.dromara.hutool.core.collection.ListUtil;
import org.dromara.hutool.core.lang.Assert;
import org.dromara.hutool.core.util.ObjUtil;
import java.io.Reader;
import java.io.Writer;
import java.lang.reflect.Type;
import java.util.List;
/**
* FastJSON2引擎实现
*
* @author Looly
* @since 6.0.0
*/
public class FastJSON2Engine extends AbstractJSONEngine {
private JSONReader.Context readerContext;
private JSONWriter.Context writerContext;
/**
* 构造
*/
public FastJSON2Engine() {
// issue#IABWBL JDK8下,在IDEA旗舰版加载Spring boot插件时,启动应用不会检查字段类是否存在
// 此处构造时调用下这个类,以便触发类是否存在的检查
Assert.notNull(JSONFactory.class);
}
@Override
public void serialize(final Object bean, final Writer writer) {
initEngine();
try (final JSONWriter jsonWriter = JSONWriter.of(this.writerContext)) {
if (bean == null) {
jsonWriter.writeNull();
} else {
jsonWriter.setRootObject(bean);
final Class valueClass = bean.getClass();
final ObjectWriter objectWriter = this.writerContext.getObjectWriter(valueClass, valueClass);
objectWriter.write(jsonWriter, bean, null, null, 0);
}
jsonWriter.flushTo(writer);
}
}
@SuppressWarnings("unchecked")
@Override
public T deserialize(final Reader reader, final Object type) {
initEngine();
final ObjectReader objectReader = this.readerContext.getObjectReader((Type) type);
try (final JSONReader jsonReader = JSONReader.of(reader, this.readerContext)) {
if (jsonReader.isEnd()) {
return null;
}
final T object = objectReader.readObject(jsonReader, (Type) type, null, 0);
jsonReader.handleResolveTasks(object);
return object;
}
}
@Override
protected void reset() {
this.readerContext = null;
this.writerContext = null;
}
@Override
protected void initEngine() {
if(null == this.readerContext){
this.readerContext = JSONFactory.createReadContext();
}
if(null == this.writerContext){
final List features = ListUtil.of();
if(ObjUtil.defaultIfNull(this.config, JSONEngineConfig::isPrettyPrint, false)){
features.add(JSONWriter.Feature.PrettyFormat);
}
this.writerContext = JSONFactory.createWriteContext(features.toArray(new JSONWriter.Feature[0]));
}
}
}