0aaf5ff408
* fix Java9 DateFormat changes * fix Codacy warnings
166 lines
5.6 KiB
Java
166 lines
5.6 KiB
Java
/*
|
|
* Copyright (C) 2008 Google Inc.
|
|
*
|
|
* 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.google.gson;
|
|
|
|
import java.io.IOException;
|
|
import java.sql.Timestamp;
|
|
import java.text.DateFormat;
|
|
import java.text.ParseException;
|
|
import java.text.ParsePosition;
|
|
import java.text.SimpleDateFormat;
|
|
import java.util.ArrayList;
|
|
import java.util.Date;
|
|
import java.util.List;
|
|
import java.util.Locale;
|
|
|
|
import com.google.gson.internal.PreJava9DateFormatProvider;
|
|
import com.google.gson.internal.bind.util.ISO8601Utils;
|
|
import com.google.gson.stream.JsonReader;
|
|
import com.google.gson.stream.JsonToken;
|
|
import com.google.gson.stream.JsonWriter;
|
|
import com.google.gson.util.VersionUtils;
|
|
|
|
/**
|
|
* This type adapter supports three subclasses of date: Date, Timestamp, and
|
|
* java.sql.Date.
|
|
*
|
|
* @author Inderjeet Singh
|
|
* @author Joel Leitch
|
|
*/
|
|
final class DefaultDateTypeAdapter extends TypeAdapter<Date> {
|
|
|
|
private static final String SIMPLE_NAME = "DefaultDateTypeAdapter";
|
|
|
|
private final Class<? extends Date> dateType;
|
|
|
|
/**
|
|
* List of 1 or more different date formats used for de-serialization attempts.
|
|
* The first of them is used for serialization as well.
|
|
*/
|
|
private final List<DateFormat> dateFormats = new ArrayList<DateFormat>();
|
|
|
|
DefaultDateTypeAdapter(Class<? extends Date> dateType) {
|
|
this.dateType = verifyDateType(dateType);
|
|
dateFormats.add(DateFormat.getDateTimeInstance(DateFormat.DEFAULT, DateFormat.DEFAULT, Locale.US));
|
|
if (!Locale.getDefault().equals(Locale.US)) {
|
|
dateFormats.add(DateFormat.getDateTimeInstance(DateFormat.DEFAULT, DateFormat.DEFAULT));
|
|
}
|
|
if (VersionUtils.isJava9OrLater()) {
|
|
dateFormats.add(PreJava9DateFormatProvider.getUSDateTimeFormat(DateFormat.DEFAULT, DateFormat.DEFAULT));
|
|
}
|
|
}
|
|
|
|
DefaultDateTypeAdapter(Class<? extends Date> dateType, String datePattern) {
|
|
this.dateType = verifyDateType(dateType);
|
|
dateFormats.add(new SimpleDateFormat(datePattern, Locale.US));
|
|
if (!Locale.getDefault().equals(Locale.US)) {
|
|
dateFormats.add(new SimpleDateFormat(datePattern));
|
|
}
|
|
}
|
|
|
|
DefaultDateTypeAdapter(Class<? extends Date> dateType, int style) {
|
|
this.dateType = verifyDateType(dateType);
|
|
dateFormats.add(DateFormat.getDateInstance(style, Locale.US));
|
|
if (!Locale.getDefault().equals(Locale.US)) {
|
|
dateFormats.add(DateFormat.getDateInstance(style));
|
|
}
|
|
if (VersionUtils.isJava9OrLater()) {
|
|
dateFormats.add(PreJava9DateFormatProvider.getUSDateFormat(style));
|
|
}
|
|
}
|
|
|
|
public DefaultDateTypeAdapter(int dateStyle, int timeStyle) {
|
|
this(Date.class, dateStyle, timeStyle);
|
|
}
|
|
|
|
public DefaultDateTypeAdapter(Class<? extends Date> dateType, int dateStyle, int timeStyle) {
|
|
this.dateType = verifyDateType(dateType);
|
|
dateFormats.add(DateFormat.getDateTimeInstance(dateStyle, timeStyle, Locale.US));
|
|
if (!Locale.getDefault().equals(Locale.US)) {
|
|
dateFormats.add(DateFormat.getDateTimeInstance(dateStyle, timeStyle));
|
|
}
|
|
if (VersionUtils.isJava9OrLater()) {
|
|
dateFormats.add(PreJava9DateFormatProvider.getUSDateTimeFormat(dateStyle, timeStyle));
|
|
}
|
|
}
|
|
|
|
private static Class<? extends Date> verifyDateType(Class<? extends Date> dateType) {
|
|
if ( dateType != Date.class && dateType != java.sql.Date.class && dateType != Timestamp.class ) {
|
|
throw new IllegalArgumentException("Date type must be one of " + Date.class + ", " + Timestamp.class + ", or " + java.sql.Date.class + " but was " + dateType);
|
|
}
|
|
return dateType;
|
|
}
|
|
|
|
// These methods need to be synchronized since JDK DateFormat classes are not thread-safe
|
|
// See issue 162
|
|
@Override
|
|
public void write(JsonWriter out, Date value) throws IOException {
|
|
if (value == null) {
|
|
out.nullValue();
|
|
return;
|
|
}
|
|
synchronized(dateFormats) {
|
|
String dateFormatAsString = dateFormats.get(0).format(value);
|
|
out.value(dateFormatAsString);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public Date read(JsonReader in) throws IOException {
|
|
if (in.peek() == JsonToken.NULL) {
|
|
in.nextNull();
|
|
return null;
|
|
}
|
|
Date date = deserializeToDate(in.nextString());
|
|
if (dateType == Date.class) {
|
|
return date;
|
|
} else if (dateType == Timestamp.class) {
|
|
return new Timestamp(date.getTime());
|
|
} else if (dateType == java.sql.Date.class) {
|
|
return new java.sql.Date(date.getTime());
|
|
} else {
|
|
// This must never happen: dateType is guarded in the primary constructor
|
|
throw new AssertionError();
|
|
}
|
|
}
|
|
|
|
private Date deserializeToDate(String s) {
|
|
synchronized (dateFormats) {
|
|
for (DateFormat dateFormat : dateFormats) {
|
|
try {
|
|
return dateFormat.parse(s);
|
|
} catch (ParseException ignored) {}
|
|
}
|
|
try {
|
|
return ISO8601Utils.parse(s, new ParsePosition(0));
|
|
} catch (ParseException e) {
|
|
throw new JsonSyntaxException(s, e);
|
|
}
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public String toString() {
|
|
DateFormat defaultFormat = dateFormats.get(0);
|
|
if (defaultFormat instanceof SimpleDateFormat) {
|
|
return SIMPLE_NAME + '(' + ((SimpleDateFormat) defaultFormat).toPattern() + ')';
|
|
} else {
|
|
return SIMPLE_NAME + '(' + defaultFormat.getClass().getSimpleName() + ')';
|
|
}
|
|
}
|
|
}
|