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Adapter alibaba fastjson to other json libraries. the fastjson version: 1.2.58
/*
* Copyright 2019 the original author or authors.
*
* Licensed under the Apache, 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.gnu.org/licenses/lgpl-3.0.html
*
* 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 com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.parser.DefaultJSONParser;
import com.alibaba.fastjson.parser.JSONLexer;
import com.alibaba.fastjson.parser.JSONToken;
import com.alibaba.fastjson.parser.deserializer.ContextObjectDeserializer;
import com.alibaba.fastjson.parser.deserializer.ObjectDeserializer;
import com.alibaba.fastjson.util.IOUtils;
import javax.xml.datatype.DatatypeConfigurationException;
import javax.xml.datatype.DatatypeFactory;
import javax.xml.datatype.XMLGregorianCalendar;
import java.io.IOException;
import java.lang.reflect.Type;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
public class CalendarCodec extends ContextObjectDeserializer implements ObjectSerializer, ObjectDeserializer, ContextObjectSerializer {
public final static CalendarCodec instance = new CalendarCodec();
private DatatypeFactory dateFactory;
@Override
public void write(JSONSerializer serializer, Object object, BeanContext context) throws IOException {
SerializeWriter out = serializer.out;
String format = context.getFormat();
Calendar calendar = (Calendar) object;
if (format.equals("unixtime")) {
long seconds = calendar.getTimeInMillis() / 1000L;
out.writeInt((int) seconds);
return;
}
DateFormat dateFormat = new SimpleDateFormat(format);
if (dateFormat == null) {
dateFormat = new SimpleDateFormat(JSON.DEFFAULT_DATE_FORMAT, serializer.locale);
}
dateFormat.setTimeZone(serializer.timeZone);
String text = dateFormat.format(calendar.getTime());
out.writeString(text);
}
public void write(JSONSerializer serializer, Object object, Object fieldName, Type fieldType, int features)
throws IOException {
SerializeWriter out = serializer.out;
if (object == null) {
out.writeNull();
return;
}
Calendar calendar;
if (object instanceof XMLGregorianCalendar) {
calendar = ((XMLGregorianCalendar) object).toGregorianCalendar();
} else {
calendar = (Calendar) object;
}
if (out.isEnabled(SerializerFeature.UseISO8601DateFormat)) {
final char quote = out.isEnabled(SerializerFeature.UseSingleQuotes) //
? '\'' //
: '\"';
out.append(quote);
int year = calendar.get(Calendar.YEAR);
int month = calendar.get(Calendar.MONTH) + 1;
int day = calendar.get(Calendar.DAY_OF_MONTH);
int hour = calendar.get(Calendar.HOUR_OF_DAY);
int minute = calendar.get(Calendar.MINUTE);
int second = calendar.get(Calendar.SECOND);
int millis = calendar.get(Calendar.MILLISECOND);
char[] buf;
if (millis != 0) {
buf = "0000-00-00T00:00:00.000".toCharArray();
IOUtils.getChars(millis, 23, buf);
IOUtils.getChars(second, 19, buf);
IOUtils.getChars(minute, 16, buf);
IOUtils.getChars(hour, 13, buf);
IOUtils.getChars(day, 10, buf);
IOUtils.getChars(month, 7, buf);
IOUtils.getChars(year, 4, buf);
} else {
if (second == 0 && minute == 0 && hour == 0) {
buf = "0000-00-00".toCharArray();
IOUtils.getChars(day, 10, buf);
IOUtils.getChars(month, 7, buf);
IOUtils.getChars(year, 4, buf);
} else {
buf = "0000-00-00T00:00:00".toCharArray();
IOUtils.getChars(second, 19, buf);
IOUtils.getChars(minute, 16, buf);
IOUtils.getChars(hour, 13, buf);
IOUtils.getChars(day, 10, buf);
IOUtils.getChars(month, 7, buf);
IOUtils.getChars(year, 4, buf);
}
}
out.write(buf);
float timeZoneF = calendar.getTimeZone().getOffset(calendar.getTimeInMillis()) / (3600.0f * 1000);
int timeZone = (int) timeZoneF;
if (timeZone == 0.0) {
out.write('Z');
} else {
if (timeZone > 9) {
out.write('+');
out.writeInt(timeZone);
} else if (timeZone > 0) {
out.write('+');
out.write('0');
out.writeInt(timeZone);
} else if (timeZone < -9) {
out.write('-');
out.writeInt(timeZone);
} else if (timeZone < 0) {
out.write('-');
out.write('0');
out.writeInt(-timeZone);
}
out.write(':');
// handles uneven timeZones 30 mins, 45 mins
// this would always be less than 60
int offSet = (int) ((timeZoneF - timeZone) * 60);
out.append(String.format("%02d", offSet));
}
out.append(quote);
} else {
Date date = calendar.getTime();
serializer.write(date);
}
}
@Override
public T deserialze(DefaultJSONParser parser, Type clazz, Object fieldName) {
return deserialze(parser, clazz, fieldName, null, 0);
}
@Override
@SuppressWarnings("unchecked")
public T deserialze(DefaultJSONParser parser, Type type, Object fieldName, String format, int features) {
Object value = DateCodec.instance.deserialze(parser, type, fieldName, format, features);
if (value instanceof Calendar) {
return (T) value;
}
Date date = (Date) value;
if (date == null) {
return null;
}
JSONLexer lexer = parser.lexer;
Calendar calendar = Calendar.getInstance(lexer.getTimeZone(), lexer.getLocale());
calendar.setTime(date);
if (type == XMLGregorianCalendar.class) {
return (T) createXMLGregorianCalendar((GregorianCalendar) calendar);
}
return (T) calendar;
}
public XMLGregorianCalendar createXMLGregorianCalendar(Calendar calendar) {
if (dateFactory == null) {
try {
dateFactory = DatatypeFactory.newInstance();
} catch (DatatypeConfigurationException e) {
throw new IllegalStateException("Could not obtain an instance of DatatypeFactory.", e);
}
}
return dateFactory.newXMLGregorianCalendar((GregorianCalendar) calendar);
}
public int getFastMatchToken() {
return JSONToken.LITERAL_INT;
}
}