Move gson to its own folder

[unical.git] / gson / com / google / gson / DefaultDateTypeAdapter.java

diff --git a/gson/com/google/gson/DefaultDateTypeAdapter.java b/gson/com/google/gson/DefaultDateTypeAdapter.java
new file mode 100644 (file)
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--- /dev/null
+++ b/gson/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();
+  }
+}