net.ilexiconn.magister.adapter.ArrayAdapter.java Source code

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Here is the source code for net.ilexiconn.magister.adapter.ArrayAdapter.java

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/*
 * Copyright (c) 2016-2016 Bas van den Boom 'Z3r0byte'
 *
 * 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 net.ilexiconn.magister.adapter;

import com.google.gson.Gson;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.TypeAdapter;
import com.google.gson.stream.JsonReader;
import com.google.gson.stream.JsonWriter;

import net.ilexiconn.magister.util.GsonUtil;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;

public class ArrayAdapter<T> extends TypeAdapter<T[]> {
    public Gson gson = GsonUtil.getGson();
    public Class<T> cls;
    public Class<? extends T[]> clsArray;

    public ArrayAdapter(Class<T> cls, Class<? extends T[]> clsArray) {
        this.cls = cls;
        this.clsArray = clsArray;
    }

    @Override
    public void write(JsonWriter out, T[] value) throws IOException {
        throw new UnsupportedOperationException("Not implemented");
    }

    @Override
    public T[] read(JsonReader in) throws IOException {
        JsonObject object = gson.getAdapter(JsonElement.class).read(in).getAsJsonObject();
        if (object.has("Items")) {
            JsonArray array = object.get("Items").getAsJsonArray();
            ArrayList<T> list = new ArrayList<T>();
            for (JsonElement element : array) {
                list.add(gson.fromJson(element, cls));
            }
            return Arrays.copyOf(list.toArray(), list.size(), clsArray);
        } else {
            T t = gson.fromJson(object, cls);
            return (T[]) new Object[] { t };
        }
    }
}