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Java Source Code
/*
* Copyright (C) 2011 Google Inc.//fromwww.java2s.com
*
* 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.bind;
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;
/**
* 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.
*/publicfinalclass SqlDateTypeAdapter extends TypeAdapter<java.sql.Date> {
publicstaticfinal TypeAdapterFactory FACTORY = new TypeAdapterFactory() {
@SuppressWarnings("unchecked") // we use a runtime check to make sure the 'T's equal
public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> typeToken) {
return typeToken.getRawType() == java.sql.Date.class
? (TypeAdapter<T>) new SqlDateTypeAdapter() : null;
}
};
privatefinal DateFormat format = new SimpleDateFormat("MMM d, yyyy");
@Override
publicsynchronized java.sql.Date read(JsonReader in) throws IOException {
if (in.peek() == JsonToken.NULL) {
in.nextNull();
return null;
}
try {
finallong utilDate = format.parse(in.nextString()).getTime();
returnnew java.sql.Date(utilDate);
} catch (ParseException e) {
thrownew JsonSyntaxException(e);
}
}
@Override
publicsynchronizedvoid write(JsonWriter out, java.sql.Date value) throws IOException {
out.value(value == null ? null : format.format(value));
}
}