io.dddspring.common.serializer.AbstractSerializer Maven / Gradle / Ivy
// Copyright 2012,2013 Vaughn Vernon
//
// 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 io.dddspring.common.serializer;
import com.google.gson.*;
import java.lang.reflect.Type;
import java.util.Date;
public class AbstractSerializer {
private Gson gson;
protected AbstractSerializer(boolean isCompact) {
this(false, isCompact);
}
protected AbstractSerializer(boolean isPretty, boolean isCompact) {
super();
if (isPretty && isCompact) {
this.buildForPrettyCompact();
} else if (isCompact) {
this.buildForCompact();
} else {
this.build();
}
}
protected Gson gson() {
return this.gson;
}
private void build() {
this.gson = new GsonBuilder().registerTypeAdapter(Date.class, new DateSerializer())
.registerTypeAdapter(Date.class, new DateDeserializer()).serializeNulls().create();
}
private void buildForCompact() {
this.gson = new GsonBuilder().registerTypeAdapter(Date.class, new DateSerializer())
.registerTypeAdapter(Date.class, new DateDeserializer()).create();
}
private void buildForPrettyCompact() {
this.gson = new GsonBuilder().registerTypeAdapter(Date.class, new DateSerializer())
.registerTypeAdapter(Date.class, new DateDeserializer()).setPrettyPrinting().create();
}
private class DateSerializer implements JsonSerializer {
public JsonElement serialize(Date source, Type typeOfSource, JsonSerializationContext context) {
return new JsonPrimitive(Long.toString(source.getTime()));
}
}
private class DateDeserializer implements JsonDeserializer {
public Date deserialize(JsonElement json, Type typeOfTarget, JsonDeserializationContext context) throws JsonParseException {
long time = Long.parseLong(json.getAsJsonPrimitive().getAsString());
return new Date(time);
}
}
}