| /* |
| * 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; |
| |
| import com.android.internal.annotations.VisibleForTesting; |
| import com.android.server.wifi.Clock; |
| import com.android.server.wifi.hotspot2.anqp.ANQPElement; |
| import com.android.server.wifi.hotspot2.anqp.Constants; |
| |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| /** |
| * Class for maintaining ANQP elements and managing the lifetime of the elements. |
| */ |
| public class ANQPData { |
| /** |
| * Entry lifetime. |
| */ |
| @VisibleForTesting |
| public static final long DATA_LIFETIME_MILLISECONDS = 3600000L; |
| |
| private final Clock mClock; |
| private final Map<Constants.ANQPElementType, ANQPElement> mANQPElements; |
| private final long mExpiryTime; |
| |
| public ANQPData(Clock clock, Map<Constants.ANQPElementType, ANQPElement> anqpElements) { |
| mClock = clock; |
| mANQPElements = new HashMap<>(); |
| if (anqpElements != null) { |
| mANQPElements.putAll(anqpElements); |
| } |
| mExpiryTime = mClock.getElapsedSinceBootMillis() + DATA_LIFETIME_MILLISECONDS; |
| } |
| |
| /** |
| * Return the ANQP elements. |
| * |
| * @return Map of ANQP elements |
| */ |
| public Map<Constants.ANQPElementType, ANQPElement> getElements() { |
| return Collections.unmodifiableMap(mANQPElements); |
| } |
| |
| /** |
| * Check if this entry is expired at the specified time. |
| * |
| * @param at The time to check for |
| * @return true if it is expired at the given time |
| */ |
| public boolean expired(long at) { |
| return mExpiryTime <= at; |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder(); |
| if (mANQPElements == null) { |
| sb.append(", unresolved, "); |
| } |
| else { |
| sb.append(", ").append(mANQPElements.size()).append(" elements, "); |
| } |
| long now = mClock.getElapsedSinceBootMillis(); |
| sb.append(" expires in ").append(Utils.toHMS(mExpiryTime - now)).append(' '); |
| sb.append(expired(now) ? 'x' : '-'); |
| sb.append(mANQPElements == null ? 'u' : '-'); |
| return sb.toString(); |
| } |
| } |