| /* |
| * Copyright (C) 2011 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.internal.sql; |
| |
| import com.google.gson.Gson; |
| import com.google.gson.JsonSyntaxException; |
| import com.google.gson.TypeAdapter; |
| import com.google.gson.TypeAdapterFactory; |
| import com.google.gson.reflect.TypeToken; |
| import com.google.gson.stream.JsonReader; |
| import com.google.gson.stream.JsonToken; |
| import com.google.gson.stream.JsonWriter; |
| import java.io.IOException; |
| import java.text.DateFormat; |
| import java.text.ParseException; |
| import java.text.SimpleDateFormat; |
| import java.util.Date; |
| |
| /** |
| * Adapter for java.sql.Date. Although this class appears stateless, it is not. |
| * DateFormat captures its time zone and locale when it is created, which gives |
| * this class state. DateFormat isn't thread safe either, so this class has |
| * to synchronize its read and write methods. |
| */ |
| final class SqlDateTypeAdapter extends TypeAdapter<java.sql.Date> { |
| static final TypeAdapterFactory FACTORY = new TypeAdapterFactory() { |
| @SuppressWarnings("unchecked") // we use a runtime check to make sure the 'T's equal |
| @Override public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> typeToken) { |
| return typeToken.getRawType() == java.sql.Date.class |
| ? (TypeAdapter<T>) new SqlDateTypeAdapter() : null; |
| } |
| }; |
| |
| private final DateFormat format = new SimpleDateFormat("MMM d, yyyy"); |
| |
| private SqlDateTypeAdapter() { |
| } |
| |
| @Override |
| public java.sql.Date read(JsonReader in) throws IOException { |
| if (in.peek() == JsonToken.NULL) { |
| in.nextNull(); |
| return null; |
| } |
| String s = in.nextString(); |
| try { |
| Date utilDate; |
| synchronized (this) { |
| utilDate = format.parse(s); |
| } |
| return new java.sql.Date(utilDate.getTime()); |
| } catch (ParseException e) { |
| throw new JsonSyntaxException("Failed parsing '" + s + "' as SQL Date; at path " + in.getPreviousPath(), e); |
| } |
| } |
| |
| @Override |
| public void write(JsonWriter out, java.sql.Date value) throws IOException { |
| if (value == null) { |
| out.nullValue(); |
| return; |
| } |
| String dateString; |
| synchronized (this) { |
| dateString = format.format(value); |
| } |
| out.value(dateString); |
| } |
| } |