/*
* ATLauncher - https://github.com/ATLauncher/ATLauncher
* Copyright (C) 2013 ATLauncher
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.atlauncher.data.mojang;
import com.google.gson.Gson;
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.util.HashMap;
import java.util.Locale;
import java.util.Map;
public class EnumTypeAdapterFactory implements TypeAdapterFactory {
@SuppressWarnings("unchecked")
@Override
public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> type) {
if (!type.getRawType().isEnum()) {
return null;
}
final Map<String, T> map = new HashMap<String, T>();
for (T c : (T[]) type.getRawType().getEnumConstants()) {
map.put(c.toString().toLowerCase(Locale.US), c);
}
return new TypeAdapter<T>() {
@Override
public T read(JsonReader reader) throws IOException {
if (reader.peek() == JsonToken.NULL) {
reader.nextNull();
return null;
}
String name = reader.nextString();
if (name == null) {
return null;
}
return map.get(name.toLowerCase(Locale.US));
}
@Override
public void write(JsonWriter writer, T value) throws IOException {
if (value == null) {
writer.nullValue();
} else {
writer.value(value.toString().toLowerCase(Locale.US));
}
}
};
}
}