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diff --git a/gson/src/main/java/com/google/gson/DefaultDateTypeAdapter.java b/gson/src/main/java/com/google/gson/DefaultDateTypeAdapter.java
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+/*
+ * 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.lang.reflect.Type;
+import java.sql.Timestamp;
+import java.text.DateFormat;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.Locale;
+import java.util.TimeZone;
+
+/**
+ * This type adapter supports three subclasses of date: Date, Timestamp, and
+ * java.sql.Date.
+ *
+ * @author Inderjeet Singh
+ * @author Joel Leitch
+ */
+final class DefaultDateTypeAdapter implements JsonSerializer<Date>, JsonDeserializer<Date> {
+
+ // TODO: migrate to streaming adapter
+
+ private final DateFormat enUsFormat;
+ private final DateFormat localFormat;
+ private final DateFormat iso8601Format;
+
+ DefaultDateTypeAdapter() {
+ this(DateFormat.getDateTimeInstance(DateFormat.DEFAULT, DateFormat.DEFAULT, Locale.US),
+ DateFormat.getDateTimeInstance(DateFormat.DEFAULT, DateFormat.DEFAULT));
+ }
+
+ DefaultDateTypeAdapter(String datePattern) {
+ this(new SimpleDateFormat(datePattern, Locale.US), new SimpleDateFormat(datePattern));
+ }
+
+ DefaultDateTypeAdapter(int style) {
+ this(DateFormat.getDateInstance(style, Locale.US), DateFormat.getDateInstance(style));
+ }
+
+ public DefaultDateTypeAdapter(int dateStyle, int timeStyle) {
+ this(DateFormat.getDateTimeInstance(dateStyle, timeStyle, Locale.US),
+ DateFormat.getDateTimeInstance(dateStyle, timeStyle));
+ }
+
+ DefaultDateTypeAdapter(DateFormat enUsFormat, DateFormat localFormat) {
+ this.enUsFormat = enUsFormat;
+ this.localFormat = localFormat;
+ this.iso8601Format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'", Locale.US);
+ this.iso8601Format.setTimeZone(TimeZone.getTimeZone("UTC"));
+ }
+
+ // These methods need to be synchronized since JDK DateFormat classes are not thread-safe
+ // See issue 162
+ public JsonElement serialize(Date src, Type typeOfSrc, JsonSerializationContext context) {
+ synchronized (localFormat) {
+ String dateFormatAsString = enUsFormat.format(src);
+ return new JsonPrimitive(dateFormatAsString);
+ }
+ }
+
+ public Date deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
+ throws JsonParseException {
+ if (!(json instanceof JsonPrimitive)) {
+ throw new JsonParseException("The date should be a string value");
+ }
+ Date date = deserializeToDate(json);
+ if (typeOfT == Date.class) {
+ return date;
+ } else if (typeOfT == Timestamp.class) {
+ return new Timestamp(date.getTime());
+ } else if (typeOfT == java.sql.Date.class) {
+ return new java.sql.Date(date.getTime());
+ } else {
+ throw new IllegalArgumentException(getClass() + " cannot deserialize to " + typeOfT);
+ }
+ }
+
+ private Date deserializeToDate(JsonElement json) {
+ synchronized (localFormat) {
+ try {
+ return localFormat.parse(json.getAsString());
+ } catch (ParseException ignored) {
+ }
+ try {
+ return enUsFormat.parse(json.getAsString());
+ } catch (ParseException ignored) {
+ }
+ try {
+ return iso8601Format.parse(json.getAsString());
+ } catch (ParseException e) {
+ throw new JsonSyntaxException(json.getAsString(), e);
+ }
+ }
+ }
+
+ @Override
+ public String toString() {
+ StringBuilder sb = new StringBuilder();
+ sb.append(DefaultDateTypeAdapter.class.getSimpleName());
+ sb.append('(').append(localFormat.getClass().getSimpleName()).append(')');
+ return sb.toString();
+ }
+}