Add TransportManager.

/*

 * Copyright 2018 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.internal.telephony.dataconnection;

import android.telephony.AccessNetworkConstants.TransportType;

import android.telephony.Rlog;

import java.util.ArrayList;

import java.util.List;

/**

 * This class represents the transport manager which manages available transports and

 * route requests to correct transport.

 */

public class TransportManager {

    private static final String TAG = TransportManager.class.getSimpleName();

    private List<Integer> mAvailableTransports = new ArrayList<>();

    public TransportManager() {

        // TODO: get transpot list from AccessNetworkManager.

        mAvailableTransports.add(TransportType.WWAN);

    }

    public List<Integer> getAvailableTransports() {

        return new ArrayList<>(mAvailableTransports);

    }

    private void log(String s) {

        Rlog.d(TAG, s);

    }

    private void loge(String s) {

        Rlog.e(TAG, s);

    }

}