Jerome Poichet | 7c99785 | 2014-05-20 10:50:05 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2009 Google Inc. All rights reserved. |
| 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.google.polo.pairing; |
| 18 | |
| 19 | import com.google.polo.exception.NoConfigurationException; |
| 20 | import com.google.polo.exception.PoloException; |
| 21 | import com.google.polo.pairing.message.ConfigurationAckMessage; |
| 22 | import com.google.polo.pairing.message.ConfigurationMessage; |
| 23 | import com.google.polo.pairing.message.EncodingOption; |
| 24 | import com.google.polo.pairing.message.OptionsMessage.ProtocolRole; |
| 25 | import com.google.polo.pairing.message.PairingRequestAckMessage; |
| 26 | import com.google.polo.pairing.message.PairingRequestMessage; |
| 27 | import com.google.polo.pairing.message.PoloMessage.PoloMessageType; |
| 28 | import com.google.polo.wire.PoloWireInterface; |
| 29 | |
| 30 | import java.io.IOException; |
| 31 | |
| 32 | /** |
| 33 | * Pairing session state machine implementation for a server. |
| 34 | */ |
| 35 | public class ServerPairingSession extends PairingSession { |
| 36 | /** |
| 37 | * Optional server name. |
| 38 | */ |
| 39 | private final String mServerName; |
| 40 | |
| 41 | public ServerPairingSession(PoloWireInterface protocol, |
| 42 | PairingContext context) { |
| 43 | this(protocol, context, null); |
| 44 | } |
| 45 | |
| 46 | public ServerPairingSession(PoloWireInterface protocol, |
| 47 | PairingContext context, String serverName) { |
| 48 | super(protocol, context); |
| 49 | mServerName = serverName; |
| 50 | } |
| 51 | |
| 52 | @Override |
| 53 | protected void doInitializationPhase() throws PoloException, IOException { |
| 54 | logDebug("Waiting for PairingRequest..."); |
| 55 | PairingRequestMessage request = (PairingRequestMessage) |
| 56 | getNextMessage(PoloMessageType.PAIRING_REQUEST); |
| 57 | |
| 58 | logDebug("Requested service to pair: " + request.getServiceName()); |
| 59 | mServiceName = request.getServiceName(); |
| 60 | |
| 61 | if (request.hasClientName()) { |
| 62 | logDebug("Client name: " + request.getClientName()); |
| 63 | mPeerName = request.getClientName(); |
| 64 | } else { |
| 65 | mPeerName = null; |
| 66 | } |
| 67 | |
| 68 | logDebug("Sending PairingRequestAck ..."); |
| 69 | PairingRequestAckMessage ack = new PairingRequestAckMessage(mServerName); |
| 70 | sendMessage(ack); |
| 71 | |
| 72 | logDebug("Waiting for Options ..."); |
| 73 | // Nothing to do with these; the client is responsible for intersecting |
| 74 | // our options with its, and proposing a valid configuration. |
| 75 | getNextMessage(PoloMessageType.OPTIONS); |
| 76 | |
| 77 | logDebug("Sending Options..."); |
| 78 | sendMessage(mLocalOptions); |
| 79 | } |
| 80 | |
| 81 | @Override |
| 82 | protected void doConfigurationPhase() throws PoloException, IOException { |
| 83 | logDebug("Waiting for Configuration..."); |
| 84 | setConfiguration((ConfigurationMessage) getNextMessage( |
| 85 | PoloMessageType.CONFIGURATION)); |
| 86 | |
| 87 | // Verify the configuration |
| 88 | EncodingOption encoding = mSessionConfig.getEncoding(); |
| 89 | |
| 90 | if (getLocalRole() == ProtocolRole.DISPLAY_DEVICE) { |
| 91 | if (!mLocalOptions.supportsOutputEncoding(encoding)) { |
| 92 | throw new NoConfigurationException("Cannot support requested " + |
| 93 | "output encoding: " + encoding.getType()); |
| 94 | } |
| 95 | } else if (getLocalRole() == ProtocolRole.INPUT_DEVICE) { |
| 96 | if (!mLocalOptions.supportsInputEncoding(encoding)) { |
| 97 | throw new NoConfigurationException("Cannot support requested " + |
| 98 | "input encoding: " + encoding.getType()); |
| 99 | } |
| 100 | } else { |
| 101 | throw new IllegalStateException(); // should never happen |
| 102 | } |
| 103 | |
| 104 | // Configuration accepted |
| 105 | logDebug("Sending ConfigurationAck..."); |
| 106 | sendMessage(new ConfigurationAckMessage()); |
| 107 | } |
| 108 | |
| 109 | /** |
| 110 | * Returns {@code true} if server name is set. |
| 111 | */ |
| 112 | public boolean hasServerName() { |
| 113 | return mServerName != null; |
| 114 | } |
| 115 | |
| 116 | /** |
| 117 | * Returns {@code true} if client name is set. |
| 118 | */ |
| 119 | public boolean hasClientName() { |
| 120 | return hasPeerName(); |
| 121 | } |
| 122 | |
| 123 | /** |
| 124 | * Returns server name, or {@code null} if not set. |
| 125 | */ |
| 126 | public String getServerName() { |
| 127 | return mServerName; |
| 128 | } |
| 129 | |
| 130 | /** |
| 131 | * Returns client name, or {@code null} if not set. |
| 132 | */ |
| 133 | public String getClientName() { |
| 134 | return getPeerName(); |
| 135 | } |
| 136 | } |