1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.printservice.recommendation.plugin.hp; 18 19 import android.annotation.NonNull; 20 import android.content.Context; 21 import android.net.nsd.NsdManager; 22 import android.net.nsd.NsdServiceInfo; 23 import android.text.TextUtils; 24 25 import com.android.printservice.recommendation.PrintServicePlugin; 26 27 import java.net.InetAddress; 28 import java.util.ArrayList; 29 30 public abstract class ServiceRecommendationPlugin implements PrintServicePlugin, ServiceListener.Observer { 31 32 protected static final String PDL_ATTRIBUTE = "pdl"; 33 34 protected final Object mLock = new Object(); 35 protected PrinterDiscoveryCallback mCallback = null; 36 protected final ServiceListener mListener; 37 protected final NsdManager mNSDManager; 38 protected final VendorInfo mVendorInfo; 39 private final int mVendorStringID; 40 41 protected ServiceRecommendationPlugin(Context context, int vendorStringID, VendorInfo vendorInfo, String[] services) { 42 mNSDManager = (NsdManager)context.getSystemService(Context.NSD_SERVICE); 43 mVendorStringID = vendorStringID; 44 mVendorInfo = vendorInfo; 45 mListener = new ServiceListener(context, this, services); 46 } 47 48 @Override 49 public int getName() { 50 return mVendorStringID; 51 } 52 53 @NonNull 54 @Override 55 public CharSequence getPackageName() { 56 return mVendorInfo.mPackageName; 57 } 58 59 @Override 60 public void start(@NonNull PrinterDiscoveryCallback callback) throws Exception { 61 synchronized (mLock) { 62 mCallback = callback; 63 } 64 mListener.start(); 65 } 66 67 @Override 68 public void stop() throws Exception { 69 synchronized (mLock) { 70 mCallback = null; 71 } 72 mListener.stop(); 73 } 74 75 @Override 76 public void dataSetChanged() { 77 synchronized (mLock) { 78 if (mCallback != null) mCallback.onChanged(getPrinters()); 79 } 80 } 81 82 @Override 83 public boolean matchesCriteria(String vendor, NsdServiceInfo nsdServiceInfo) { 84 return TextUtils.equals(vendor, mVendorInfo.mVendorID); 85 } 86 87 public ArrayList<InetAddress> getPrinters() { 88 return mListener.getPrinters(); 89 } 90 } 91
