| /* |
| * Copyright (C) 2011 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.server.net; |
| |
| import android.net.NetworkIdentity; |
| |
| import java.io.DataInputStream; |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| import java.util.HashSet; |
| |
| /** |
| * Identity of a {@code iface}, defined by the set of {@link NetworkIdentity} |
| * active on that interface. |
| * |
| * @hide |
| */ |
| public class NetworkIdentitySet extends HashSet<NetworkIdentity> implements |
| Comparable<NetworkIdentitySet> { |
| private static final int VERSION_INIT = 1; |
| private static final int VERSION_ADD_ROAMING = 2; |
| private static final int VERSION_ADD_NETWORK_ID = 3; |
| |
| public NetworkIdentitySet() { |
| } |
| |
| public NetworkIdentitySet(DataInputStream in) throws IOException { |
| final int version = in.readInt(); |
| final int size = in.readInt(); |
| for (int i = 0; i < size; i++) { |
| if (version <= VERSION_INIT) { |
| final int ignored = in.readInt(); |
| } |
| final int type = in.readInt(); |
| final int subType = in.readInt(); |
| final String subscriberId = readOptionalString(in); |
| final String networkId; |
| if (version >= VERSION_ADD_NETWORK_ID) { |
| networkId = readOptionalString(in); |
| } else { |
| networkId = null; |
| } |
| final boolean roaming; |
| if (version >= VERSION_ADD_ROAMING) { |
| roaming = in.readBoolean(); |
| } else { |
| roaming = false; |
| } |
| |
| add(new NetworkIdentity(type, subType, subscriberId, networkId, false)); |
| } |
| } |
| |
| public void writeToStream(DataOutputStream out) throws IOException { |
| out.writeInt(VERSION_ADD_NETWORK_ID); |
| out.writeInt(size()); |
| for (NetworkIdentity ident : this) { |
| out.writeInt(ident.getType()); |
| out.writeInt(ident.getSubType()); |
| writeOptionalString(out, ident.getSubscriberId()); |
| writeOptionalString(out, ident.getNetworkId()); |
| out.writeBoolean(ident.getRoaming()); |
| } |
| } |
| |
| private static void writeOptionalString(DataOutputStream out, String value) throws IOException { |
| if (value != null) { |
| out.writeByte(1); |
| out.writeUTF(value); |
| } else { |
| out.writeByte(0); |
| } |
| } |
| |
| private static String readOptionalString(DataInputStream in) throws IOException { |
| if (in.readByte() != 0) { |
| return in.readUTF(); |
| } else { |
| return null; |
| } |
| } |
| |
| @Override |
| public int compareTo(NetworkIdentitySet another) { |
| if (isEmpty()) return -1; |
| if (another.isEmpty()) return 1; |
| |
| final NetworkIdentity ident = iterator().next(); |
| final NetworkIdentity anotherIdent = another.iterator().next(); |
| return ident.compareTo(anotherIdent); |
| } |
| } |