/*
* Copyright 1999-2017 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.reflect.Type;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.parser.DefaultJSONParser;
import com.alibaba.fastjson.parser.JSONLexer;
import com.alibaba.fastjson.parser.JSONToken;
import com.alibaba.fastjson.parser.deserializer.ObjectDeserializer;
import com.alibaba.fastjson.util.TypeUtils;
/**
* @author wenshao[szujobs@hotmail.com]
*/
public class LongCodec implements ObjectSerializer, ObjectDeserializer {
public static LongCodec instance = new LongCodec();
public void write(JSONSerializer serializer, Object object, Object fieldName, Type fieldType, int features) throws IOException {
SerializeWriter out = serializer.out;
if (object == null) {
out.writeNull(SerializerFeature.WriteNullNumberAsZero);
} else {
long value = ((Long) object).longValue();
out.writeLong(value);
if (out.isEnabled(SerializerFeature.WriteClassName) //
&& value <= Integer.MAX_VALUE && value >= Integer.MIN_VALUE //
&& fieldType != Long.class
&& fieldType != long.class) {
out.write('L');
}
}
}
@SuppressWarnings("unchecked")
public <T> T deserialze(DefaultJSONParser parser, Type clazz, Object fieldName) {
final JSONLexer lexer = parser.lexer;
Long longObject;
final int token = lexer.token();
if (token == JSONToken.LITERAL_INT) {
long longValue = lexer.longValue();
lexer.nextToken(JSONToken.COMMA);
longObject = Long.valueOf(longValue);
} else {
if (token == JSONToken.LBRACE) {
JSONObject jsonObject = new JSONObject(true);
parser.parseObject(jsonObject);
longObject = TypeUtils.castToLong(jsonObject);
} else {
Object value = parser.parse();
longObject = TypeUtils.castToLong(value);
}
if (longObject == null) {
return null;
}
}
return clazz == AtomicLong.class //
? (T) new AtomicLong(longObject.longValue()) //
: (T) longObject;
}
public int getFastMatchToken() {
return JSONToken.LITERAL_INT;
}
}