90 lines
3.0 KiB
Java
90 lines
3.0 KiB
Java
/*
|
|
* 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;
|
|
import java.util.TimeZone;
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
@SuppressWarnings("JavaUtilDate")
|
|
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();
|
|
synchronized (this) {
|
|
TimeZone originalTimeZone = format.getTimeZone(); // Save the original time zone
|
|
try {
|
|
Date 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);
|
|
} finally {
|
|
format.setTimeZone(originalTimeZone); // Restore the original time zone after parsing
|
|
}
|
|
}
|
|
}
|
|
|
|
@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);
|
|
}
|
|
}
|