| /* |
| * 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.plugin.mdnsFilter; |
| |
| import android.content.Context; |
| import android.net.nsd.NsdServiceInfo; |
| import android.annotation.NonNull; |
| import android.annotation.StringRes; |
| |
| import com.android.printservice.recommendation.PrintServicePlugin; |
| import com.android.printservice.recommendation.util.MDNSFilteredDiscovery; |
| import com.android.printservice.recommendation.util.MDNSUtils; |
| |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Set; |
| |
| /** |
| * A plugin listening for mDNS results and only adding the ones that {@link |
| * MDNSUtils#isVendorPrinter match} configured list |
| */ |
| public class MDNSFilterPlugin implements PrintServicePlugin { |
| |
| /** The mDNS service types supported */ |
| private static final Set<String> PRINTER_SERVICE_TYPES = new HashSet<String>() {{ |
| add("_ipp._tcp"); |
| }}; |
| |
| /** |
| * The printer filter for {@link MDNSFilteredDiscovery} passing only mDNS results |
| * that {@link MDNSUtils#isVendorPrinter match} configured list |
| */ |
| private static class VendorNameFilter implements MDNSFilteredDiscovery.PrinterFilter { |
| /** mDNS names handled by the print service this plugin is for */ |
| private final @NonNull Set<String> mMDNSNames; |
| |
| /** |
| * Filter constructor |
| * |
| * @param vendorNames The vendor names to pass |
| */ |
| VendorNameFilter(@NonNull Set<String> vendorNames) { |
| mMDNSNames = new HashSet<>(vendorNames); |
| } |
| |
| @Override |
| public boolean matchesCriteria(NsdServiceInfo nsdServiceInfo) { |
| return MDNSUtils.isVendorPrinter(nsdServiceInfo, mMDNSNames); |
| } |
| } |
| |
| /** Name of the print service this plugin is for */ |
| private final @StringRes int mName; |
| |
| /** Package name of the print service this plugin is for */ |
| private final @NonNull CharSequence mPackageName; |
| |
| /** The mDNS filtered discovery */ |
| private final MDNSFilteredDiscovery mMDNSFilteredDiscovery; |
| |
| /** |
| * Create new stub that assumes that a print service can be used to print on all mPrinters |
| * matching some mDNS names. |
| * |
| * @param context The context the plugin runs in |
| * @param name The user friendly name of the print service |
| * @param packageName The package name of the print service |
| * @param mDNSNames The mDNS names of the printer. |
| */ |
| public MDNSFilterPlugin(@NonNull Context context, @NonNull String name, |
| @NonNull CharSequence packageName, @NonNull List<String> mDNSNames) { |
| mName = context.getResources().getIdentifier(name, null, |
| "com.android.printservice.recommendation"); |
| mPackageName = packageName; |
| mMDNSFilteredDiscovery = new MDNSFilteredDiscovery(context, PRINTER_SERVICE_TYPES, |
| new VendorNameFilter(new HashSet<>(mDNSNames))); |
| } |
| |
| @Override |
| public @NonNull CharSequence getPackageName() { |
| return mPackageName; |
| } |
| |
| @Override |
| public void start(@NonNull PrinterDiscoveryCallback callback) throws Exception { |
| mMDNSFilteredDiscovery.start(callback); |
| } |
| |
| @Override |
| public @StringRes int getName() { |
| return mName; |
| } |
| |
| @Override |
| public void stop() throws Exception { |
| mMDNSFilteredDiscovery.stop(); |
| } |
| } |