org.asynchttpclient.shaded.util.StringUtils Maven / Gradle / Ivy
/*
* Copyright (c) 2014 AsyncHttpClient Project. All rights reserved.
*
* This program is licensed to you under the Apache License Version 2.0,
* and you may not use this file except in compliance with the Apache License Version 2.0.
* You may obtain a copy of the Apache License Version 2.0 at http://www.apache.org/licenses/LICENSE-2.0.
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the Apache License Version 2.0 is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the Apache License Version 2.0 for the specific language governing permissions and limitations there under.
*/
package org.asynchttpclient.shaded.util;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.Charset;
public final class StringUtils {
private StringUtils() {
}
public static ByteBuffer charSequence2ByteBuffer(CharSequence cs, Charset charset) {
return charset.encode(CharBuffer.wrap(cs));
}
public static byte[] byteBuffer2ByteArray(ByteBuffer bb) {
byte[] rawBase = new byte[bb.remaining()];
bb.get(rawBase);
return rawBase;
}
public static byte[] charSequence2Bytes(CharSequence sb, Charset charset) {
ByteBuffer bb = charSequence2ByteBuffer(sb, charset);
return byteBuffer2ByteArray(bb);
}
public static String toHexString(byte[] data) {
StringBuilder buffer = StringBuilderPool.DEFAULT.stringBuilder();
for (byte aData : data) {
buffer.append(Integer.toHexString((aData & 0xf0) >>> 4));
buffer.append(Integer.toHexString(aData & 0x0f));
}
return buffer.toString();
}
public static void appendBase16(StringBuilder buf, byte[] bytes) {
int base = 16;
for (byte b : bytes) {
int bi = 0xff & b;
int c = '0' + (bi / base) % base;
if (c > '9')
c = 'a' + (c - '0' - 10);
buf.append((char) c);
c = '0' + bi % base;
if (c > '9')
c = 'a' + (c - '0' - 10);
buf.append((char) c);
}
}
}