/*
* Copyright 1999-2101 Alibaba 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 com.alibaba.fastjson.serializer;
import java.io.IOException;
import java.lang.ref.Reference;
import java.lang.ref.SoftReference;
import java.lang.ref.WeakReference;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.concurrent.atomic.AtomicReference;
import com.alibaba.fastjson.parser.DefaultJSONParser;
import com.alibaba.fastjson.parser.JSONToken;
import com.alibaba.fastjson.parser.deserializer.ObjectDeserializer;
/**
* @author wenshao[szujobs@hotmail.com]
*/
public class ReferenceCodec implements ObjectSerializer, ObjectDeserializer {
public final static ReferenceCodec instance = new ReferenceCodec();
@SuppressWarnings("rawtypes")
public void write(JSONSerializer serializer, Object object, Object fieldName, Type fieldType, int features) throws IOException {
Object item;
if (object instanceof AtomicReference) {
AtomicReference val = (AtomicReference) object;
item = val.get();
} else {
item = ((Reference) object).get();
}
serializer.write(item);
}
@SuppressWarnings({ "unchecked", "rawtypes" })
public <T> T deserialze(DefaultJSONParser parser, Type type, Object fieldName) {
ParameterizedType paramType = (ParameterizedType) type;
Type itemType = paramType.getActualTypeArguments()[0];
Object itemObject = parser.parseObject(itemType);
Type rawType = paramType.getRawType();
if (rawType == AtomicReference.class) {
return (T) new AtomicReference(itemObject);
}
if (rawType == WeakReference.class) {
return (T) new WeakReference(itemObject);
}
if (rawType == SoftReference.class) {
return (T) new SoftReference(itemObject);
}
throw new UnsupportedOperationException(rawType.toString());
}
public int getFastMatchToken() {
return JSONToken.LBRACE;
}
}