1 /* 2 * Copyright (C) 2023 The Android Open Source Project 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 android.net.http; 18 19 import androidx.annotation.NonNull; 20 21 import java.util.List; 22 import java.util.Map; 23 24 /** 25 * Unmodifiable container of headers or trailers. 26 */ 27 public abstract class HeaderBlock { 28 /** 29 * Returns an unmodifiable list of the header field and value pairs. 30 * For response, the headers are in the same order they are received over the wire. 31 * For request, the headers are in the same order they are added. 32 * 33 * @return an unmodifiable list of header field and value pairs 34 */ 35 @NonNull getAsList()36 public abstract List<Map.Entry<String, String>> getAsList(); 37 38 /** 39 * Returns an unmodifiable map from header field names to lists of values. 40 * Order of each list of values for a single header field is: 41 * For response, the same order they were received over the wire. 42 * For request, the same order they were added. 43 * The iteration order of keys is unspecified. 44 * 45 * @return an unmodifiable map from header field names to lists of values 46 */ 47 @NonNull getAsMap()48 public abstract Map<String, List<String>> getAsMap(); 49 } 50