Examples with CharBuffer java.nio.CharBuffer used on opensource projects

Example 26 with CharBuffer

use of java.nio.CharBuffer in project hs4j by killme2008.

the class AbstractIoBuffer method getPrefixedString.

/**
     * Reads a string which has a length field before the actual encoded string,
     * using the specified <code>decoder</code> and returns it.
     * 
     * @param prefixLength
     *            the length of the length field (1, 2, or 4)
     * @param decoder
     *            the decoder to use for decoding the string
     * @return the prefixed string
     * @throws CharacterCodingException
     *             when decoding fails
     * @throws BufferUnderflowException
     *             when there is not enough data available
     */
@Override
public String getPrefixedString(int prefixLength, CharsetDecoder decoder) throws CharacterCodingException {
    if (!prefixedDataAvailable(prefixLength)) {
        throw new BufferUnderflowException();
    }
    int fieldSize = 0;
    switch(prefixLength) {
        case 1:
            fieldSize = getUnsigned();
            break;
        case 2:
            fieldSize = getUnsignedShort();
            break;
        case 4:
            fieldSize = getInt();
            break;
    }
    if (fieldSize == 0) {
        return "";
    }
    boolean utf16 = decoder.charset().name().startsWith("UTF-16");
    if (utf16 && (fieldSize & 1) != 0) {
        throw new BufferDataException("fieldSize is not even for a UTF-16 string.");
    }
    int oldLimit = limit();
    int end = position() + fieldSize;
    if (oldLimit < end) {
        throw new BufferUnderflowException();
    }
    limit(end);
    decoder.reset();
    int expectedLength = (int) (remaining() * decoder.averageCharsPerByte()) + 1;
    CharBuffer out = CharBuffer.allocate(expectedLength);
    for (; ; ) {
        CoderResult cr;
        if (hasRemaining()) {
            cr = decoder.decode(buf(), out, true);
        } else {
            cr = decoder.flush(out);
        }
        if (cr.isUnderflow()) {
            break;
        }
        if (cr.isOverflow()) {
            CharBuffer o = CharBuffer.allocate(out.capacity() + expectedLength);
            out.flip();
            o.put(out);
            out = o;
            continue;
        }
        cr.throwException();
    }
    limit(oldLimit);
    position(end);
    return out.flip().toString();
}

Example 27 with CharBuffer

use of java.nio.CharBuffer in project rest.li by linkedin.

the class BufferChain method bufferToUtf8CString.

private String bufferToUtf8CString(int numBytes, ArrayList<ByteBuffer> bufferList) throws IOException {
    String result;
    if (numBytes == 0) {
        result = "";
    } else if (bufferList == null) {
        _decoder.reset();
        // char should be smaller than # of bytes in buffer.
        CharBuffer charBuffer = CharBuffer.allocate(numBytes);
        int limit = _currentBuffer.limit();
        _currentBuffer.limit(_currentBuffer.position() + numBytes);
        checkCoderResult(_decoder.decode(_currentBuffer, charBuffer, true));
        _currentBuffer.limit(limit);
        _decoder.flush(charBuffer);
        charBuffer.flip();
        result = charBuffer.toString();
    } else {
        // char should be smaller than # of bytes in buffer.
        char[] charBuffer = new char[numBytes];
        BufferChain chain = new BufferChain(_order, bufferList, _bufferSize);
        InputStream inputStream = chain.asInputStream();
        Reader reader = new InputStreamReader(inputStream, _charset);
        int offset = 0;
        int remaining = numBytes;
        int charactersRead;
        while ((charactersRead = reader.read(charBuffer, offset, remaining)) > 0) {
            offset += charactersRead;
            remaining -= charactersRead;
        }
        result = new String(charBuffer, 0, offset);
    }
    advanceBufferIfCurrentBufferHasNoRemaining();
    // terminal zero byte
    _currentBuffer.get();
    return result;
}

Example 28 with CharBuffer

use of java.nio.CharBuffer in project jphp by jphp-compiler.

the class CharArrayMemory method put.

public void put(int index, String s) {
    int len = s.length();
    int sLen = buffer.limit();
    if (index < 0)
        return;
    char ch = len == 0 ? '\0' : s.charAt(0);
    if (index < sLen)
        buffer.put(index, ch);
    else {
        int cnt = index - sLen;
        CharBuffer tmp = CharBuffer.allocate(sLen + cnt + 1);
        tmp.put(buffer.array());
        buffer = tmp;
        for (int i = 0; i < cnt; i++) {
            buffer.append('\32');
        }
        buffer.append(ch);
    }
}

Example 29 with CharBuffer

use of java.nio.CharBuffer in project neo4j by neo4j.

the class AdversarialReader method read.

@Override
public int read(CharBuffer target) throws IOException {
    if (adversary.injectFailureOrMischief(IOException.class, BufferOverflowException.class, IndexOutOfBoundsException.class)) {
        CharBuffer dup = target.duplicate();
        dup.limit(Math.max(target.limit() / 2, 1));
        return reader.read(dup);
    }
    return reader.read(target);
}

Example 30 with CharBuffer

use of java.nio.CharBuffer in project netty by netty.

the class AsciiStringCharacterTest method caseInsensitiveHasherCharBuffer.

@Test
public void caseInsensitiveHasherCharBuffer() {
    String s1 = new String("TRANSFER-ENCODING");
    char[] array = new char[128];
    final int offset = 100;
    for (int i = 0; i < s1.length(); ++i) {
        array[offset + i] = s1.charAt(i);
    }
    CharBuffer buffer = CharBuffer.wrap(array, offset, s1.length());
    assertEquals(AsciiString.hashCode(s1), AsciiString.hashCode(buffer));
}