android/net/wifi/p2p/nsd/WifiP2pDnsSdServiceRequest.java

/*
 * Copyright (C) 2012 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 android.net.wifi.p2p.nsd;

import android.net.wifi.p2p.WifiP2pManager;

/**
 * A class for creating a Bonjour service discovery request for use with
 * {@link WifiP2pManager#addServiceRequest} and {@link WifiP2pManager#removeServiceRequest}
 *
 * {@see WifiP2pManager}
 * {@see WifiP2pServiceRequest}
 * {@see WifiP2pUpnpServiceRequest}
 */
public class WifiP2pDnsSdServiceRequest extends WifiP2pServiceRequest {

    /**
     * This constructor is only used in newInstance().
     *
     * @param query The part of service specific query.
     * @hide
     */
    private WifiP2pDnsSdServiceRequest(String query) {
        super(WifiP2pServiceInfo.SERVICE_TYPE_BONJOUR, query);
    }

    /**
     * This constructor is only used in newInstance().
     * @hide
     */
    private WifiP2pDnsSdServiceRequest() {
        super(WifiP2pServiceInfo.SERVICE_TYPE_BONJOUR, null);
    }

    private WifiP2pDnsSdServiceRequest(String dnsQuery, int dnsType, int version) {
        super(WifiP2pServiceInfo.SERVICE_TYPE_BONJOUR, WifiP2pDnsSdServiceInfo.createRequest(
                dnsQuery,
                dnsType,
                version));
    }

    /**
     * Create a service discovery request to search all Bonjour services.
     *
     * @return service request for Bonjour.
     */
    public static WifiP2pDnsSdServiceRequest newInstance() {
        return new WifiP2pDnsSdServiceRequest();
    }

    /**
     * Create a service discovery to search for Bonjour services with the specified
     * service type.
     *
     * @param serviceType service type. Cannot be null <br>
     *  "_afpovertcp._tcp."(Apple File Sharing over TCP)<br>
     *  "_ipp._tcp" (IP Printing over TCP)<br>
     *  "_http._tcp" (http service)
     * @return service request for DnsSd.
     */
    public static WifiP2pDnsSdServiceRequest newInstance(String serviceType) {
        if (serviceType == null) {
            throw new IllegalArgumentException("service type cannot be null");
        }
        return new WifiP2pDnsSdServiceRequest(serviceType + ".local.",
                WifiP2pDnsSdServiceInfo.DNS_TYPE_PTR,
                WifiP2pDnsSdServiceInfo.VERSION_1);
    }

    /**
     * Create a service discovery request to get the TXT data from the specified
     * Bonjour service.
     *
     * @param instanceName instance name. Cannot be null. <br>
     *  "MyPrinter"
     * @param serviceType service type. Cannot be null. <br>
     * e.g) <br>
     *  "_afpovertcp._tcp"(Apple File Sharing over TCP)<br>
     *  "_ipp._tcp" (IP Printing over TCP)<br>
     * @return service request for Bonjour.
     */
    public static WifiP2pDnsSdServiceRequest newInstance(String instanceName,
            String serviceType) {
        if (instanceName == null || serviceType == null) {
            throw new IllegalArgumentException(
                    "instance name or service type cannot be null");
        }
        String fullDomainName = instanceName + "." + serviceType + ".local.";
        return new WifiP2pDnsSdServiceRequest(fullDomainName,
                WifiP2pDnsSdServiceInfo.DNS_TYPE_TXT,
                WifiP2pDnsSdServiceInfo.VERSION_1);
    }
}