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
17package com.android.printservice.recommendation.plugin.hp;
18
19import android.content.Context;
20import android.net.nsd.NsdManager;
21import android.net.nsd.NsdServiceInfo;
22import android.annotation.NonNull;
23import android.text.TextUtils;
24import com.android.printservice.recommendation.PrintServicePlugin;
25
26public abstract class ServiceRecommendationPlugin implements PrintServicePlugin, ServiceListener.Observer {
27
28    protected static final String PDL_ATTRIBUTE = "pdl";
29
30    protected final Object mLock = new Object();
31    protected PrinterDiscoveryCallback mCallback = null;
32    protected final ServiceListener mListener;
33    protected final NsdManager mNSDManager;
34    protected final VendorInfo mVendorInfo;
35    private final int mVendorStringID;
36
37    protected ServiceRecommendationPlugin(Context context, int vendorStringID, VendorInfo vendorInfo, String[] services) {
38        mNSDManager = (NsdManager)context.getSystemService(Context.NSD_SERVICE);
39        mVendorStringID = vendorStringID;
40        mVendorInfo = vendorInfo;
41        mListener = new ServiceListener(context, this, services);
42    }
43
44    @Override
45    public int getName() {
46        return mVendorStringID;
47    }
48
49    @NonNull
50    @Override
51    public CharSequence getPackageName() {
52        return mVendorInfo.mPackageName;
53    }
54
55    @Override
56    public void start(@NonNull PrinterDiscoveryCallback callback) throws Exception {
57        synchronized (mLock) {
58            mCallback = callback;
59        }
60        mListener.start();
61    }
62
63    @Override
64    public void stop() throws Exception {
65        synchronized (mLock) {
66            mCallback = null;
67        }
68        mListener.stop();
69    }
70
71    @Override
72    public void dataSetChanged() {
73        synchronized (mLock) {
74            if (mCallback != null) mCallback.onChanged(getCount());
75        }
76    }
77
78    @Override
79    public boolean matchesCriteria(String vendor, NsdServiceInfo nsdServiceInfo) {
80        return TextUtils.equals(vendor, mVendorInfo.mVendorID);
81    }
82
83    public int getCount() {
84        return mListener.getCount().second;
85    }
86}
87