test/jdk/java/net/httpclient/http2/java.net.http/jdk/internal/net/http/hpack/SpecHelper.java
/*
* Copyright (c) 2014, 2017, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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package jdk.internal.net.http.hpack;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Collectors;
//
// THIS IS NOT A TEST
//
public final class SpecHelper {
private SpecHelper() {
throw new AssertionError();
}
public static ByteBuffer toBytes(String hexdump) {
Pattern hexByte = Pattern.compile("[0-9a-fA-F]{2}");
List<String> bytes = new ArrayList<>();
Matcher matcher = hexByte.matcher(hexdump);
while (matcher.find()) {
bytes.add(matcher.group(0));
}
ByteBuffer result = ByteBuffer.allocate(bytes.size());
for (String f : bytes) {
result.put((byte) Integer.parseInt(f, 16));
}
result.flip();
return result;
}
public static String toHexdump(ByteBuffer bb) {
List<String> words = new ArrayList<>();
int i = 0;
while (bb.hasRemaining()) {
if (i % 2 == 0) {
words.add("");
}
byte b = bb.get();
String hex = Integer.toHexString(256 + Byte.toUnsignedInt(b)).substring(1);
words.set(i / 2, words.get(i / 2) + hex);
i++;
}
return words.stream().collect(Collectors.joining(" "));
}
}