| /* |
| * 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.server.wifi.hotspot2.anqp; |
| |
| import android.text.TextUtils; |
| |
| import com.android.internal.annotations.VisibleForTesting; |
| import com.android.server.wifi.ByteBufferReader; |
| |
| import java.net.ProtocolException; |
| import java.nio.BufferUnderflowException; |
| import java.nio.ByteBuffer; |
| import java.nio.charset.StandardCharsets; |
| import java.util.Locale; |
| |
| /** |
| * A generic Internationalized name field used in the Operator Friendly Name ANQP element |
| * (see HS2.0 R2 Spec 4.2) and the Venue Name ANQP element (see 802.11-2012 8.4.4.4). |
| * |
| * Format: |
| * |
| * | Length | Language Code | Name | |
| * 1 3 variable |
| */ |
| public class I18Name { |
| @VisibleForTesting |
| public static final int LANGUAGE_CODE_LENGTH = 3; |
| |
| @VisibleForTesting |
| public static final int MINIMUM_LENGTH = LANGUAGE_CODE_LENGTH; |
| |
| private final String mLanguage; |
| private final Locale mLocale; |
| private final String mText; |
| |
| @VisibleForTesting |
| public I18Name(String language, Locale locale, String text) { |
| mLanguage = language; |
| mLocale = locale; |
| mText = text; |
| } |
| |
| /** |
| * Parse a I18Name from the given buffer. |
| * |
| * @param payload The byte buffer to read from |
| * @return {@link I18Name} |
| * @throws BufferUnderflowException |
| * @throws ProtocolException |
| */ |
| public static I18Name parse(ByteBuffer payload) throws ProtocolException { |
| // Retrieve the length field. |
| int length = payload.get() & 0xFF; |
| |
| // Check for the minimum required length. |
| if (length < MINIMUM_LENGTH) { |
| throw new ProtocolException("Invalid length: " + length); |
| } |
| |
| // Read the language string. |
| String language = ByteBufferReader.readString( |
| payload, LANGUAGE_CODE_LENGTH, StandardCharsets.US_ASCII).trim(); |
| Locale locale; |
| try { |
| // The language code is a two or three character language code defined in ISO-639. |
| locale = new Locale.Builder().setLanguage(language).build(); |
| } catch (Exception e) { |
| throw new ProtocolException("Invalid language: " + language); |
| } |
| // Read the text string. |
| String text = ByteBufferReader.readString(payload, length - LANGUAGE_CODE_LENGTH, |
| StandardCharsets.UTF_8); |
| return new I18Name(language, locale, text); |
| } |
| |
| public String getLanguage() { |
| return mLanguage; |
| } |
| |
| public Locale getLocale() { |
| return mLocale; |
| } |
| |
| public String getText() { |
| return mText; |
| } |
| |
| @Override |
| public boolean equals(Object thatObject) { |
| if (this == thatObject) { |
| return true; |
| } |
| if (!(thatObject instanceof I18Name)) { |
| return false; |
| } |
| |
| I18Name that = (I18Name) thatObject; |
| return TextUtils.equals(mLanguage, that.mLanguage) |
| && TextUtils.equals(mText, that.mText); |
| } |
| |
| @Override |
| public int hashCode() { |
| int result = mLanguage.hashCode(); |
| result = 31 * result + mText.hashCode(); |
| return result; |
| } |
| |
| @Override |
| public String toString() { |
| return mText + ':' + mLocale.getLanguage(); |
| } |
| } |