/*
* 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.reflect.Type;
import java.util.concurrent.atomic.AtomicLong;
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) throws IOException {
SerializeWriter out = serializer.getWriter();
if (object == null) {
if (out.isEnabled(SerializerFeature.WriteNullNumberAsZero)) {
out.write('0');
} else {
out.writeNull();
}
return;
}
long value = ((Long) object).longValue();
out.writeLong(value);
if (serializer.isEnabled(SerializerFeature.WriteClassName)) {
if (value <= Integer.MAX_VALUE && value >= Integer.MIN_VALUE) {
if (fieldType != Long.class) {
out.write('L');
}
}
}
}
@SuppressWarnings("unchecked")
public <T> T deserialze(DefaultJSONParser parser, Type clazz, Object fieldName) {
final JSONLexer lexer = parser.getLexer();
Long longObject;
if (lexer.token() == JSONToken.LITERAL_INT) {
long longValue = lexer.longValue();
lexer.nextToken(JSONToken.COMMA);
longObject = Long.valueOf(longValue);
} else {
Object value = parser.parse();
if (value == null) {
return null;
}
longObject = TypeUtils.castToLong(value);
}
if (clazz == AtomicLong.class) {
return (T) new AtomicLong(longObject.longValue());
}
return (T) longObject;
}
public int getFastMatchToken() {
return JSONToken.LITERAL_INT;
}
}