Merge "Add Samsung print recommendation plugin." into nyc-dev

packages/PrintRecommendationService/res/values/donottranslate.xml

@@ -32,8 +32,15 @@
         <item>Hewlett Packard</item>
     </string-array>
 
+    <string-array name="known_print_vendor_info_for_samsung" translatable="false">
+        <item>com.sec.app.samsungprintservice</item>
+        <item>Samsung Electronics</item>
+        <item>Samsung</item>
+    </string-array>
+
     <array name="known_print_plugin_vendors" translatable="false">
         <item>@array/known_print_vendor_info_for_mopria</item>
         <item>@array/known_print_vendor_info_for_hp</item>
+        <item>@array/known_print_vendor_info_for_samsung</item>
     </array>
 </resources>

packages/PrintRecommendationService/res/values/strings.xml

@@ -23,7 +23,7 @@
     <string name="plugin_vendor_brother">Brother</string>
     <string name="plugin_vendor_canon">Canon</string>
     <string name="plugin_vendor_xerox">Xerox</string>
-    <string name="plugin_vendor_samsung">Samsung Electronics</string>
+    <string name="plugin_vendor_samsung">Samsung</string>
     <string name="plugin_vendor_epson">Epson</string>
     <string name="plugin_vendor_konica_minolta">Konica Minolta</string>
     <string name="plugin_vendor_fuji">Fuji</string>

packages/PrintRecommendationService/res/xml/vendorconfigs.xml

@@ -50,14 +50,6 @@
         </mdns-names>
     </vendor>
 
-    <vendor>
-        <name>@string/plugin_vendor_samsung</name>
-        <package>com.sec.app.samsungprintservice</package>
-        <mdns-names>
-            <mdns-name>Samsung</mdns-name>
-        </mdns-names>
-    </vendor>
-
     <vendor>
         <name>@string/plugin_vendor_epson</name>
         <package>com.epson.mobilephone.android.epsonprintserviceplugin</package>

packages/PrintRecommendationService/src/com/android/printservice/recommendation/RecommendationServiceImpl.java

@@ -25,6 +25,7 @@ import com.android.printservice.recommendation.plugin.hp.HPRecommendationPlugin;
 import com.android.printservice.recommendation.plugin.mdnsFilter.MDNSFilterPlugin;
 import com.android.printservice.recommendation.plugin.mdnsFilter.VendorConfig;
 import com.android.printservice.recommendation.plugin.mopria.MopriaRecommendationPlugin;
+import com.android.printservice.recommendation.plugin.samsung.SamsungRecommendationPlugin;
 import org.xmlpull.v1.XmlPullParserException;
 
 import java.io.IOException;
@@ -74,6 +75,14 @@ public class RecommendationServiceImpl extends RecommendationService
                     " plugin", e);
         }
 
+        try {
+            mPlugins.add(new RemotePrintServicePlugin(new SamsungRecommendationPlugin(this), this,
+                    false));
+        } catch (Exception e) {
+            Log.e(LOG_TAG, "Could not initiate " + getString(R.string.plugin_vendor_samsung) +
+                    " plugin", e);
+        }
+
         final int numPlugins = mPlugins.size();
         for (int i = 0; i < numPlugins; i++) {
             try {

packages/PrintRecommendationService/src/com/android/printservice/recommendation/plugin/samsung/MDnsUtils.java

@@ -0,0 +1,74 @@
+/*
+ * 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.samsung;
+
+import android.net.nsd.NsdServiceInfo;
+import android.text.TextUtils;
+
+import java.nio.charset.StandardCharsets;
+import java.util.Locale;
+import java.util.Map;
+
+public class MDnsUtils {
+    public static final String ATTRIBUTE__TY = "ty";
+    public static final String ATTRIBUTE__PRODUCT = "product";
+    public static final String ATTRIBUTE__USB_MFG = "usb_MFG";
+    public static final String ATTRIBUTE__MFG = "mfg";
+
+    public static String getString(byte[] value) {
+        if (value != null) return new String(value,StandardCharsets.UTF_8);
+        return null;
+    }
+
+    public static boolean isVendorPrinter(NsdServiceInfo networkDevice, String[] vendorValues) {
+
+        Map<String,byte[]> attributes = networkDevice.getAttributes();
+        String product = getString(attributes.get(ATTRIBUTE__PRODUCT));
+        String ty = getString(attributes.get(ATTRIBUTE__TY));
+        String usbMfg = getString(attributes.get(ATTRIBUTE__USB_MFG));
+        String mfg = getString(attributes.get(ATTRIBUTE__MFG));
+        return containsVendor(product, vendorValues) || containsVendor(ty, vendorValues) || containsVendor(usbMfg, vendorValues) || containsVendor(mfg, vendorValues);
+
+    }
+
+    public static String getVendor(NsdServiceInfo networkDevice) {
+        String vendor;
+
+        Map<String,byte[]> attributes = networkDevice.getAttributes();
+        vendor = getString(attributes.get(ATTRIBUTE__MFG));
+        if (!TextUtils.isEmpty(vendor)) return vendor;
+        vendor = getString(attributes.get(ATTRIBUTE__USB_MFG));
+        if (!TextUtils.isEmpty(vendor)) return vendor;
+
+        return null;
+    }
+
+    private static boolean containsVendor(String container, String[] vendorValues) {
+        if ((container == null) || (vendorValues == null)) return false;
+        for (String value : vendorValues) {
+            if (containsString(container, value)
+                || containsString(container.toLowerCase(Locale.US), value.toLowerCase(Locale.US))
+                || containsString(container.toUpperCase(Locale.US), value.toUpperCase(Locale.US)))
+                return true;
+        }
+        return false;
+    }
+
+    private static boolean containsString(String container, String contained) {
+        return (container != null) && (contained != null) && (container.equalsIgnoreCase(contained) || container.contains(contained + " "));
+    }
+}

packages/PrintRecommendationService/src/com/android/printservice/recommendation/plugin/samsung/PrinterHashMap.java

@@ -0,0 +1,33 @@
+/*
+ * 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.samsung;
+
+import android.net.nsd.NsdServiceInfo;
+
+import java.util.HashMap;
+
+final class PrinterHashMap extends HashMap<String, NsdServiceInfo> {
+    public static String getKey(NsdServiceInfo serviceInfo) {
+        return serviceInfo.getServiceName();
+    }
+    public NsdServiceInfo addPrinter(NsdServiceInfo device) {
+        return put(getKey(device), device);
+    }
+    public NsdServiceInfo removePrinter(NsdServiceInfo device) {
+        return remove(getKey(device));
+    }
+}

packages/PrintRecommendationService/src/com/android/printservice/recommendation/plugin/samsung/SamsungRecommendationPlugin.java

@@ -0,0 +1,102 @@
+/*
+(c) Copyright 2016 Samsung Electronics..
+
+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.samsung;
+
+import android.content.Context;
+import android.net.nsd.NsdServiceInfo;
+import android.text.TextUtils;
+
+import java.util.Locale;
+import java.util.Map;
+
+import com.android.printservice.recommendation.R;
+
+public class SamsungRecommendationPlugin extends ServiceRecommendationPlugin {
+
+    private static final String TAG = "SamsungRecommendation";
+
+    private static final String ATTR_USB_MFG = "usb_MFG";
+    private static final String ATTR_MFG = "mfg";
+    private static final String ATTR_USB_MDL = "usb_MDL";
+    private static final String ATTR_MDL = "mdl";
+    private static final String ATTR_PRODUCT = "product";
+    private static final String ATTR_TY = "ty";
+
+    private static String[] mNotSupportedDevices = new String[]{
+            "SCX-5x15",
+            "SF-555P",
+            "CF-555P",
+            "SCX-4x16",
+            "SCX-4214F",
+            "CLP-500",
+            "CJX-",
+            "MJC-"
+    };
+
+    private static boolean isSupportedModel(String model) {
+        if (!TextUtils.isEmpty(model)) {
+            String modelToUpper = model.toUpperCase(Locale.US);
+            for (String unSupportedPrinter : mNotSupportedDevices) {
+                if (modelToUpper.contains(unSupportedPrinter)) {
+                    return  false;
+                }
+            }
+        }
+        return true;
+    }
+
+    public SamsungRecommendationPlugin(Context context) {
+        super(context, R.string.plugin_vendor_samsung, new VendorInfo(context.getResources(), R.array.known_print_vendor_info_for_samsung), new String[]{"_pdl-datastream._tcp"});
+    }
+
+    @Override
+    public boolean matchesCriteria(String vendor, NsdServiceInfo nsdServiceInfo) {
+        if (!TextUtils.equals(vendor, mVendorInfo.mVendorID)) return false;
+
+        String modelName = getModelName(nsdServiceInfo);
+        if (modelName != null) {
+            return (isSupportedModel(modelName));
+        }
+        return false;
+    }
+
+    private String getModelName(NsdServiceInfo resolvedDevice) {
+        Map<String,byte[]> attributes = resolvedDevice.getAttributes();
+        String usb_mfg = MDnsUtils.getString(attributes.get(ATTR_USB_MFG));
+        if (TextUtils.isEmpty(usb_mfg)) {
+            usb_mfg = MDnsUtils.getString(attributes.get(ATTR_MFG));
+        }
+
+        String usb_mdl = MDnsUtils.getString(attributes.get(ATTR_USB_MDL));
+        if (TextUtils.isEmpty(usb_mdl)) {
+            usb_mdl = MDnsUtils.getString(attributes.get(ATTR_MDL));
+        }
+
+        String modelName = null;
+        if (!TextUtils.isEmpty(usb_mfg) && !TextUtils.isEmpty(usb_mdl)) {
+            modelName = usb_mfg.trim() + " " + usb_mdl.trim();
+        } else {
+            modelName = MDnsUtils.getString(attributes.get(ATTR_PRODUCT));
+            if (TextUtils.isEmpty(modelName)) {
+                modelName = MDnsUtils.getString(attributes.get(ATTR_TY));
+            }
+        }
+
+        return modelName;
+    }
+}

packages/PrintRecommendationService/src/com/android/printservice/recommendation/plugin/samsung/ServiceListener.java

@@ -0,0 +1,186 @@
+/*
+ * 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.samsung;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.net.nsd.NsdManager;
+import android.net.nsd.NsdServiceInfo;
+import android.text.TextUtils;
+import android.util.Pair;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import com.android.printservice.recommendation.R;
+import com.android.printservice.recommendation.util.DiscoveryListenerMultiplexer;
+
+public class ServiceListener implements ServiceResolveQueue.ResolveCallback {
+
+    private final NsdManager mNSDManager;
+    private final Map<String, VendorInfo> mVendorInfoHashMap;
+    private final String[] mServiceType;
+    private final Observer mObserver;
+    private final ServiceResolveQueue mResolveQueue;
+    private List<NsdManager.DiscoveryListener> mListeners = new ArrayList<>();
+    public HashMap<String, PrinterHashMap> mVendorHashMap = new HashMap<>();
+
+    public interface Observer {
+        boolean matchesCriteria(String vendor, NsdServiceInfo serviceInfo);
+        void dataSetChanged();
+    }
+
+    public ServiceListener(Context context, Observer observer, String[] serviceTypes) {
+        mObserver = observer;
+        mServiceType = serviceTypes;
+        mNSDManager = (NsdManager)context.getSystemService(Context.NSD_SERVICE);
+        mResolveQueue = ServiceResolveQueue.getInstance(mNSDManager);
+
+        Map<String, VendorInfo> vendorInfoMap = new HashMap<>();
+        TypedArray testArray = context.getResources().obtainTypedArray(R.array.known_print_plugin_vendors);
+        for(int i = 0; i < testArray.length(); i++) {
+            int arrayID = testArray.getResourceId(i, 0);
+            if (arrayID != 0) {
+                VendorInfo info = new VendorInfo(context.getResources(), arrayID);
+                vendorInfoMap.put(info.mVendorID, info);
+                vendorInfoMap.put(info.mPackageName, info);
+            }
+        }
+        testArray.recycle();
+        mVendorInfoHashMap = vendorInfoMap;
+    }
+
+    @Override
+    public void serviceResolved(NsdServiceInfo nsdServiceInfo) {
+        printerFound(nsdServiceInfo);
+    }
+
+    private synchronized void printerFound(NsdServiceInfo nsdServiceInfo) {
+        if (nsdServiceInfo == null) return;
+        if (TextUtils.isEmpty(PrinterHashMap.getKey(nsdServiceInfo))) return;
+        String vendor = MDnsUtils.getVendor(nsdServiceInfo);
+        if (vendor == null) vendor = "";
+        for(Map.Entry<String,VendorInfo> entry : mVendorInfoHashMap.entrySet()) {
+            for(String vendorValues : entry.getValue().mDNSValues) {
+                if (vendor.equalsIgnoreCase(vendorValues)) {
+                    vendor = entry.getValue().mVendorID;
+                    break;
+                }
+            }
+            // intentional pointer check
+            //noinspection StringEquality
+            if ((vendor != entry.getValue().mVendorID) &&
+                    MDnsUtils.isVendorPrinter(nsdServiceInfo, entry.getValue().mDNSValues)) {
+                vendor = entry.getValue().mVendorID;
+            }
+            // intentional pointer check
+            //noinspection StringEquality
+            if (vendor == entry.getValue().mVendorID) break;
+        }
+
+        if (TextUtils.isEmpty(vendor)) {
+            return;
+        }
+
+        if (!mObserver.matchesCriteria(vendor, nsdServiceInfo))
+            return;
+        boolean mapsChanged;
+
+        PrinterHashMap vendorHash = mVendorHashMap.get(vendor);
+        if (vendorHash == null) {
+            vendorHash = new PrinterHashMap();
+        }
+        mapsChanged = (vendorHash.addPrinter(nsdServiceInfo) == null);
+        mVendorHashMap.put(vendor, vendorHash);
+
+        if (mapsChanged) {
+            mObserver.dataSetChanged();
+        }
+    }
+
+    private synchronized void printerRemoved(NsdServiceInfo nsdServiceInfo) {
+        boolean wasRemoved = false;
+        Set<String> vendors = mVendorHashMap.keySet();
+        for(String vendor : vendors) {
+            PrinterHashMap map = mVendorHashMap.get(vendor);
+            wasRemoved |= (map.removePrinter(nsdServiceInfo) != null);
+            if (map.isEmpty()) wasRemoved |= (mVendorHashMap.remove(vendor) != null);
+        }
+        if (wasRemoved) {
+            mObserver.dataSetChanged();
+        }
+    }
+
+    public void start() {
+        stop();
+        for(final String service :mServiceType) {
+            NsdManager.DiscoveryListener listener = new NsdManager.DiscoveryListener() {
+                @Override
+                public void onStartDiscoveryFailed(String s, int i) {
+
+                }
+
+                @Override
+                public void onStopDiscoveryFailed(String s, int i) {
+
+                }
+
+                @Override
+                public void onDiscoveryStarted(String s) {
+
+                }
+
+                @Override
+                public void onDiscoveryStopped(String s) {
+
+                }
+
+                @Override
+                public void onServiceFound(NsdServiceInfo nsdServiceInfo) {
+                    mResolveQueue.queueRequest(nsdServiceInfo, ServiceListener.this);
+                }
+
+                @Override
+                public void onServiceLost(NsdServiceInfo nsdServiceInfo) {
+                    mResolveQueue.removeRequest(nsdServiceInfo, ServiceListener.this);
+                    printerRemoved(nsdServiceInfo);
+                }
+            };
+            DiscoveryListenerMultiplexer.addListener(mNSDManager, service, listener);
+            mListeners.add(listener);
+        }
+    }
+
+    public void stop() {
+        for(NsdManager.DiscoveryListener listener : mListeners) {
+            DiscoveryListenerMultiplexer.removeListener(mNSDManager, listener);
+        }
+        mVendorHashMap.clear();
+        mListeners.clear();
+    }
+
+    public Pair<Integer, Integer> getCount() {
+        int count = 0;
+        for (PrinterHashMap map : mVendorHashMap.values()) {
+            count += map.size();
+        }
+        return Pair.create(mVendorHashMap.size(), count);
+    }
+}

packages/PrintRecommendationService/src/com/android/printservice/recommendation/plugin/samsung/ServiceRecommendationPlugin.java

@@ -0,0 +1,86 @@
+/*
+ * 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.samsung;
+
+import android.content.Context;
+import android.net.nsd.NsdManager;
+import android.net.nsd.NsdServiceInfo;
+import android.annotation.NonNull;
+import android.text.TextUtils;
+import com.android.printservice.recommendation.PrintServicePlugin;
+
+public abstract class ServiceRecommendationPlugin implements PrintServicePlugin, ServiceListener.Observer {
+
+    protected static final String PDL_ATTRIBUTE = "pdl";
+
+    protected final Object mLock = new Object();
+    protected PrinterDiscoveryCallback mCallback = null;
+    protected final ServiceListener mListener;
+    protected final NsdManager mNSDManager;
+    protected final VendorInfo mVendorInfo;
+    private final int mVendorStringID;
+
+    protected ServiceRecommendationPlugin(Context context, int vendorStringID, VendorInfo vendorInfo, String[] services) {
+        mNSDManager = (NsdManager)context.getSystemService(Context.NSD_SERVICE);
+        mVendorStringID = vendorStringID;
+        mVendorInfo = vendorInfo;
+        mListener = new ServiceListener(context, this, services);
+    }
+
+    @Override
+    public int getName() {
+        return mVendorStringID;
+    }
+
+    @NonNull
+    @Override
+    public CharSequence getPackageName() {
+        return mVendorInfo.mPackageName;
+    }
+
+    @Override
+    public void start(@NonNull PrinterDiscoveryCallback callback) throws Exception {
+        synchronized (mLock) {
+            mCallback = callback;
+        }
+        mListener.start();
+    }
+
+    @Override
+    public void stop() throws Exception {
+        synchronized (mLock) {
+            mCallback = null;
+        }
+        mListener.stop();
+    }
+
+    @Override
+    public void dataSetChanged() {
+        synchronized (mLock) {
+            if (mCallback != null) mCallback.onChanged(getCount());
+        }
+    }
+
+    @Override
+    public boolean matchesCriteria(String vendor, NsdServiceInfo nsdServiceInfo) {
+        return TextUtils.equals(vendor, mVendorInfo.mVendorID);
+    }
+
+    public int getCount() {
+        return mListener.getCount().second;
+    }
+}

packages/PrintRecommendationService/src/com/android/printservice/recommendation/plugin/samsung/ServiceResolveQueue.java

@@ -0,0 +1,109 @@
+/*
+ * 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.samsung;
+
+import android.net.nsd.NsdManager;
+import android.net.nsd.NsdServiceInfo;
+import android.util.Pair;
+import com.android.printservice.recommendation.util.NsdResolveQueue;
+
+import java.util.LinkedList;
+
+final class ServiceResolveQueue {
+
+    private final NsdManager mNsdManager;
+    private final LinkedList<Pair<NsdServiceInfo, ResolveCallback>> mQueue = new LinkedList<>();
+    private final Object mLock = new Object();
+
+    private static Object sLock = new Object();
+    private static ServiceResolveQueue sInstance = null;
+    private final NsdResolveQueue mNsdResolveQueue;
+    private Pair<NsdServiceInfo, ResolveCallback> mCurrentRequest = null;
+
+    public static void createInstance(NsdManager nsdManager) {
+        if (sInstance == null) sInstance = new ServiceResolveQueue(nsdManager);
+    }
+
+    public static ServiceResolveQueue getInstance(NsdManager nsdManager) {
+        synchronized (sLock) {
+            createInstance(nsdManager);
+            return sInstance;
+        }
+    }
+
+    public static void destroyInstance() {
+        sInstance = null;
+    }
+
+    public interface ResolveCallback {
+        void serviceResolved(NsdServiceInfo nsdServiceInfo);
+    }
+
+    public ServiceResolveQueue(NsdManager nsdManager) {
+        mNsdManager = nsdManager;
+        mNsdResolveQueue = NsdResolveQueue.getInstance();
+    }
+
+    public void queueRequest(NsdServiceInfo serviceInfo, ResolveCallback callback) {
+        synchronized (mLock) {
+            Pair<NsdServiceInfo, ResolveCallback> newRequest = Pair.create(serviceInfo, callback);
+            if (mQueue.contains(newRequest)) return;
+            mQueue.add(newRequest);
+            makeNextRequest();
+        }
+    }
+
+    public void removeRequest(NsdServiceInfo serviceInfo, ResolveCallback callback) {
+        synchronized (mLock) {
+            Pair<NsdServiceInfo, ResolveCallback> newRequest = Pair.create(serviceInfo, callback);
+            mQueue.remove(newRequest);
+            if ((mCurrentRequest != null) && newRequest.equals(mCurrentRequest)) mCurrentRequest = null;
+        }
+    }
+
+    private void makeNextRequest() {
+        synchronized (mLock) {
+            if (mCurrentRequest != null) return;
+            if (mQueue.isEmpty()) return;
+            mCurrentRequest = mQueue.removeFirst();
+            mNsdResolveQueue.resolve(mNsdManager, mCurrentRequest.first,
+                    new NsdManager.ResolveListener() {
+                        @Override
+                        public void onResolveFailed(NsdServiceInfo nsdServiceInfo, int i) {
+                            synchronized (mLock) {
+                                if (mCurrentRequest != null) mQueue.add(mCurrentRequest);
+                                makeNextRequest();
+                            }
+                        }
+
+                        @Override
+                        public void onServiceResolved(NsdServiceInfo nsdServiceInfo) {
+                            synchronized (mLock) {
+                                if (mCurrentRequest != null) {
+                                    mCurrentRequest.second.serviceResolved(nsdServiceInfo);
+                                    mCurrentRequest = null;
+                                }
+                                makeNextRequest();
+                            }
+                        }
+                    });
+
+        }
+    }
+
+
+}

packages/PrintRecommendationService/src/com/android/printservice/recommendation/plugin/samsung/VendorInfo.java

@@ -0,0 +1,40 @@
+/*
+ * 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.samsung;
+
+import android.content.res.Resources;
+
+import java.util.Arrays;
+
+public final class VendorInfo {
+
+    public final String mPackageName;
+    public final String mVendorID;
+    public final String[] mDNSValues;
+    public final int mID;
+
+    public VendorInfo(Resources resources, int vendor_info_id) {
+        mID = vendor_info_id;
+        String[] data = resources.getStringArray(vendor_info_id);
+        if ((data == null) || (data.length < 2)) {
+            data = new String[] { null, null };
+        }
+        mPackageName = data[0];
+        mVendorID = data[1];
+        mDNSValues = (data.length > 2) ? Arrays.copyOfRange(data, 2, data.length) : new String[]{};
+    }
+}