Java ByteBuffer Set byteBuffersToString(ByteBuffer[] bufs, Charset cs)

Description

byte Buffers To String

License

Open Source License

Declaration

private static String byteBuffersToString(ByteBuffer[] bufs, Charset cs) throws CharacterCodingException 

Method Source Code

//package com.java2s;
/*/*w w w .  j a  va 2 s .c  om*/
 * Copyright (c) 2015 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.
 */

import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.CharacterCodingException;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;
import java.nio.charset.CoderResult;

public class Main {
    private static String byteBuffersToString(ByteBuffer[] bufs, Charset cs) throws CharacterCodingException {

        CharsetDecoder cd = cs.newDecoder();
        int len = 0;
        for (ByteBuffer buf : bufs) {
            len += buf.remaining();
        }
        int en = (int) (len * (double) cd.maxCharsPerByte());
        char[] ca = new char[en];
        cd.reset();
        CharBuffer cb = CharBuffer.wrap(ca);

        CoderResult cr = null;

        for (int i = 0; i < bufs.length; i++) {

            ByteBuffer buf = bufs[i];
            cr = cd.decode(buf, cb, i < bufs.length - 1);
            if (!cr.isUnderflow())
                cr.throwException();
        }

        cr = cd.flush(cb);
        if (!cr.isUnderflow())
            cr.throwException();

        return new String(ca, 0, cb.position());
    }
}

Related

1. arrayCopy(ByteBuffer buffer, int position, byte[] bytes, int offset, int length)
2. base64FormatOfBinarySet(Collection bs)
3. blockCopy(ByteBuffer source, int srcOffset, byte[] dest, int destOffset, int count)
4. byteIndexOf(ByteBuffer buffer, byte[] temp, int offset)
5. c_memset(ByteBuffer b, int c_, int size)
6. charSequence2ByteBuffer(CharSequence cs, Charset charset)
7. charstoUTF8Bytes(char[] srcBuf, int srcOffset, int srcLength, ByteBuffer dest, int destOffset)