1 /* 2 * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 package jdk.incubator.http.internal.hpack; 26 27 import java.nio.ByteBuffer; 28 29 abstract class IndexNameValueWriter implements BinaryRepresentationWriter { 30 31 private final int pattern; 32 private final int prefix; 33 private final IntegerWriter intWriter = new IntegerWriter(); 34 private final StringWriter nameWriter = new StringWriter(); 35 private final StringWriter valueWriter = new StringWriter(); 36 37 protected boolean indexedRepresentation; 38 39 private static final int NEW = 0; 40 private static final int NAME_PART_WRITTEN = 1; 41 private static final int VALUE_WRITTEN = 2; 42 43 private int state = NEW; 44 45 protected IndexNameValueWriter(int pattern, int prefix) { 46 this.pattern = pattern; 47 this.prefix = prefix; 48 } 49 50 IndexNameValueWriter index(int index) { 51 indexedRepresentation = true; 52 intWriter.configure(index, prefix, pattern); 53 return this; 54 } 55 56 IndexNameValueWriter name(CharSequence name, boolean useHuffman) { 57 indexedRepresentation = false; 58 intWriter.configure(0, prefix, pattern); 59 nameWriter.configure(name, useHuffman); 60 return this; 61 } 62 63 IndexNameValueWriter value(CharSequence value, boolean useHuffman) { 64 valueWriter.configure(value, useHuffman); 65 return this; 66 } 67 68 @Override 69 public boolean write(HeaderTable table, ByteBuffer destination) { 70 if (state < NAME_PART_WRITTEN) { 71 if (indexedRepresentation) { 72 if (!intWriter.write(destination)) { 73 return false; 74 } 75 } else { 76 if (!intWriter.write(destination) || 77 !nameWriter.write(destination)) { 78 return false; 79 } 80 } 81 state = NAME_PART_WRITTEN; 82 } 83 if (state < VALUE_WRITTEN) { 84 if (!valueWriter.write(destination)) { 85 return false; 86 } 87 state = VALUE_WRITTEN; 88 } 89 return state == VALUE_WRITTEN; 90 } 91 92 @Override 93 public IndexNameValueWriter reset() { 94 intWriter.reset(); 95 if (!indexedRepresentation) { 96 nameWriter.reset(); 97 } 98 valueWriter.reset(); 99 state = NEW; 100 return this; 101 } 102 }