| /* |
| * 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.printservice.recommendation.util; |
| |
| import android.net.nsd.NsdServiceInfo; |
| import android.util.ArrayMap; |
| |
| import java.net.InetAddress; |
| import java.util.ArrayList; |
| |
| /** |
| * Map to store {@link NsdServiceInfo} belonging to printers. If two infos have the same |
| * {@link PrinterHashMap#getKey(NsdServiceInfo) key} they are considered the same. |
| */ |
| public class PrinterHashMap { |
| private final ArrayMap<String, NsdServiceInfo> mPrinters = new ArrayMap<>(); |
| |
| /** |
| * Key uniquely identifying a printer. |
| * |
| * @param serviceInfo The service info describing the printer |
| * |
| * @return The key |
| */ |
| public static String getKey(NsdServiceInfo serviceInfo) { |
| return serviceInfo.getServiceName(); |
| } |
| |
| /** |
| * Add a printer. |
| * |
| * @param device The service info of the printer |
| * |
| * @return The service info of the printer that was previously registered for the same key |
| */ |
| public NsdServiceInfo addPrinter(NsdServiceInfo device) { |
| return mPrinters.put(getKey(device), device); |
| } |
| |
| /** |
| * Remove a printer. |
| * |
| * @param device The service info of the printer |
| * |
| * @return The service info of the printer that was previously registered for the same key |
| */ |
| public NsdServiceInfo removePrinter(NsdServiceInfo device) { |
| return mPrinters.remove(getKey(device)); |
| } |
| |
| /** |
| * @return the addresses of printers |
| */ |
| public ArrayList<InetAddress> getPrinterAddresses() { |
| int numPrinters = mPrinters.size(); |
| ArrayList<InetAddress> printerAddressess = new ArrayList<>(numPrinters); |
| for (int i = 0; i < numPrinters; i++) { |
| printerAddressess.add(mPrinters.valueAt(i).getHost()); |
| } |
| |
| return printerAddressess; |
| } |
| |
| /** |
| * Remove all printers |
| */ |
| public void clear() { |
| mPrinters.clear(); |
| } |
| |
| /** |
| * @return {@code} true iff the map is empty |
| */ |
| public boolean isEmpty() { |
| return mPrinters.isEmpty(); |
| } |
| } |