Java ByteBuffer Decode decode(byte firstByte, ByteBuffer buffer, String charset)

Description

decode

License

Open Source License

Declaration

public static final String decode(byte firstByte, ByteBuffer buffer,
            String charset) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.io.UnsupportedEncodingException;
import java.nio.ByteBuffer;

public class Main {
    private static final long OB_MAX_1B_STR_LEN = 55;
    private static final byte OB_VARCHAR_LEN_MASK = 0x3f;

    public static final String decode(byte firstByte, ByteBuffer buffer,
            String charset) {/*from  w w  w. ja  va 2 s  .c o m*/
        int lenOrValue = firstByte & OB_VARCHAR_LEN_MASK;
        int strLen = 0;
        if (lenOrValue <= OB_MAX_1B_STR_LEN) {
            strLen = lenOrValue;
        } else {
            for (int n = 0; n < lenOrValue - OB_MAX_1B_STR_LEN; n++) {
                strLen |= ((buffer.get() & 0xffl) << (n << 3));
            }
        }
        byte[] ret = new byte[strLen];
        buffer.get(ret);
        try {
            return new String(ret, charset);
        } catch (UnsupportedEncodingException e) {
            return "";// never happen
        }
    }
}

Related

1. bytesToChars(CharsetDecoder decoder, ByteBuffer bytes, CharBuffer chars)
2. decode(ByteBuffer bb)
3. decode(ByteBuffer bb, CharsetDecoder decoder)
4. decode(Charset charset, ByteBuffer buffer)
5. decode(CharsetDecoder decoder, ByteBuffer src, CharBuffer dst)