1 /* 2 * ==================================================================== 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * ==================================================================== 20 * 21 * This software consists of voluntary contributions made by many 22 * individuals on behalf of the Apache Software Foundation. For more 23 * information on the Apache Software Foundation, please see 24 * <http://www.apache.org/>. 25 * 26 */ 27 28 package org.apache.hc.core5.http2.frame; 29 30 /** 31 * HTTP/2 stream ID generator. 32 * 33 * @since 5.0 34 */ 35 public interface StreamIdGenerator { 36 37 int generate(int previousMax); 38 39 boolean isSameSide(int streamId); 40 41 StreamIdGenerator ODD = new StreamIdGenerator() { 42 43 @Override 44 public int generate(final int previousMax) { 45 int i = previousMax + 1; 46 if (i % 2 == 0) { 47 i++; 48 } 49 return i; 50 } 51 52 @Override 53 public boolean isSameSide(final int streamId) { 54 return (streamId & 1) == 1; 55 } 56 57 }; 58 59 StreamIdGenerator EVEN = new StreamIdGenerator() { 60 61 @Override 62 public int generate(final int previousMax) { 63 int i = previousMax + 1; 64 if (i % 2 == 1) { 65 i++; 66 } 67 return i; 68 } 69 70 @Override 71 public boolean isSameSide(final int streamId) { 72 return (streamId & 1) == 0; 73 } 74 75 }; 76 77 }