| /* |
| * Copyright (C) 2023 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 org.chromium.net.impl; |
| |
| import android.net.http.HeaderBlock; |
| |
| import androidx.annotation.VisibleForTesting; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.TreeMap; |
| |
| /** |
| * An implementation of {@link HeaderBlock}. |
| */ |
| public class HeaderBlockImpl extends HeaderBlock { |
| private final List<Map.Entry<String, String>> mAllHeadersList; |
| private Map<String, List<String>> mHeadersMap; |
| |
| @VisibleForTesting(otherwise = VisibleForTesting.PACKAGE_PRIVATE) |
| public HeaderBlockImpl(List<Map.Entry<String, String>> allHeadersList) { |
| mAllHeadersList = Collections.unmodifiableList(allHeadersList); |
| } |
| |
| @Override |
| public List<Map.Entry<String, String>> getAsList() { |
| return mAllHeadersList; |
| } |
| |
| @Override |
| public Map<String, List<String>> getAsMap() { |
| // This is potentially racy...but races will only result in wasted resource. |
| if (mHeadersMap != null) { |
| return mHeadersMap; |
| } |
| Map<String, List<String>> map = new TreeMap<>(String.CASE_INSENSITIVE_ORDER); |
| for (Map.Entry<String, String> entry : mAllHeadersList) { |
| List<String> values = map.computeIfAbsent( |
| entry.getKey(), |
| key -> new ArrayList<>()); |
| values.add(entry.getValue()); |
| } |
| map.replaceAll((key, values) -> Collections.unmodifiableList(values)); |
| mHeadersMap = Collections.unmodifiableMap(map); |
| return mHeadersMap; |
| } |
| } |