/*
 * Copyright (C) 2016 The Android Open Source Project
 *
 * 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.android.tv.data;

import android.os.Parcel;
import android.os.Parcelable;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

/** A convenience class for the list of {@link Parcelable}s. */
public final class ParcelableList<T extends Parcelable> implements Parcelable {
    /** Create instance from {@link Parcel}. */
    public static ParcelableList fromParcel(Parcel in) {
        ParcelableList list = new ParcelableList();
        int length = in.readInt();
        if (length > 0) {
            for (int i = 0; i < length; ++i) {
                list.mList.add(in.readParcelable(Thread.currentThread().getContextClassLoader()));
            }
        }
        return list;
    }

    /** A creator for {@link ParcelableList}. */
    public static final Creator<ParcelableList> CREATOR =
            new Creator<ParcelableList>() {
                @Override
                public ParcelableList createFromParcel(Parcel in) {
                    return ParcelableList.fromParcel(in);
                }

                @Override
                public ParcelableList[] newArray(int size) {
                    return new ParcelableList[size];
                }
            };

    private final List<T> mList = new ArrayList<>();

    private ParcelableList() {}

    public ParcelableList(Collection<T> initialList) {
        mList.addAll(initialList);
    }

    /** Returns the list. */
    public List<T> getList() {
        return new ArrayList<T>(mList);
    }

    @Override
    public int describeContents() {
        return 0;
    }

    @Override
    public void writeToParcel(Parcel out, int paramInt) {
        out.writeInt(mList.size());
        for (T data : mList) {
            out.writeParcelable(data, 0);
        }
    }
}