com.ning.http.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 com.ning.http.util;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.Charset;
public final class StringUtils {
private static final ThreadLocal STRING_BUILDERS = new ThreadLocal() {
protected StringBuilder initialValue() {
return new StringBuilder(512);
};
};
/**
* BEWARE: MUSN'T APPEND TO ITSELF!
* @return a pooled StringBuilder
*/
public static StringBuilder stringBuilder() {
StringBuilder sb = STRING_BUILDERS.get();
sb.setLength(0);
return sb;
}
private StringUtils() {
// unused
}
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);
}
}