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

Example 21 with CharBuffer

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

the class UriComponent method decodeOctets.

/**
     * Decodes octets to characters using the UTF-8 decoding and appends
     * the characters to a StringBuffer.
     *
     * @return the index to the next unchecked character in the string to decode
     */
private static int decodeOctets(final int i, final ByteBuffer bb, final StringBuilder sb) {
    // If there is only one octet and is an ASCII character
    if (bb.limit() == 1 && (bb.get(0) & 0xFF) < 0x80) {
        // Octet can be appended directly
        sb.append((char) bb.get(0));
        return i + 2;
    } else {
        //
        final CharBuffer cb = UTF_8_CHARSET.decode(bb);
        sb.append(cb.toString());
        return i + bb.limit() * 3 - 1;
    }
}

Example 22 with CharBuffer

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

the class UriComponent method appendUTF8EncodedCharacter.

private static void appendUTF8EncodedCharacter(final StringBuilder sb, final int codePoint) {
    final CharBuffer chars = CharBuffer.wrap(Character.toChars(codePoint));
    final ByteBuffer bytes = UTF_8_CHARSET.encode(chars);
    while (bytes.hasRemaining()) {
        appendPercentEncodedOctet(sb, bytes.get() & 0xFF);
    }
}

Example 23 with CharBuffer

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

the class AbstractIoBuffer method getString.

/**
     * {@inheritDoc}
     */
@Override
public String getString(int fieldSize, CharsetDecoder decoder) throws CharacterCodingException {
    checkFieldSize(fieldSize);
    if (fieldSize == 0) {
        return "";
    }
    if (!hasRemaining()) {
        return "";
    }
    boolean utf16 = decoder.charset().name().startsWith("UTF-16");
    if (utf16 && (fieldSize & 1) != 0) {
        throw new IllegalArgumentException("fieldSize is not even.");
    }
    int oldPos = position();
    int oldLimit = limit();
    int end = oldPos + fieldSize;
    if (oldLimit < end) {
        throw new BufferUnderflowException();
    }
    int i;
    if (!utf16) {
        for (i = oldPos; i < end; i++) {
            if (get(i) == 0) {
                break;
            }
        }
        if (i == end) {
            limit(end);
        } else {
            limit(i);
        }
    } else {
        for (i = oldPos; i < end; i += 2) {
            if (get(i) == 0 && get(i + 1) == 0) {
                break;
            }
        }
        if (i == end) {
            limit(end);
        } else {
            limit(i);
        }
    }
    if (!hasRemaining()) {
        limit(oldLimit);
        position(end);
        return "";
    }
    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;
        }
        if (cr.isError()) {
            // Revert the buffer back to the previous state.
            limit(oldLimit);
            position(oldPos);
            cr.throwException();
        }
    }
    limit(oldLimit);
    position(end);
    return out.flip().toString();
}

Example 24 with CharBuffer

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

the class AbstractIoBuffer method putString.

/**
     * {@inheritDoc}
     */
@Override
public IoBuffer putString(CharSequence val, int fieldSize, CharsetEncoder encoder) throws CharacterCodingException {
    checkFieldSize(fieldSize);
    if (fieldSize == 0) {
        return this;
    }
    autoExpand(fieldSize);
    boolean utf16 = encoder.charset().name().startsWith("UTF-16");
    if (utf16 && (fieldSize & 1) != 0) {
        throw new IllegalArgumentException("fieldSize is not even.");
    }
    int oldLimit = limit();
    int end = position() + fieldSize;
    if (oldLimit < end) {
        throw new BufferOverflowException();
    }
    if (val.length() == 0) {
        if (!utf16) {
            put((byte) 0x00);
        } else {
            put((byte) 0x00);
            put((byte) 0x00);
        }
        position(end);
        return this;
    }
    CharBuffer in = CharBuffer.wrap(val);
    limit(end);
    encoder.reset();
    for (; ; ) {
        CoderResult cr;
        if (in.hasRemaining()) {
            cr = encoder.encode(in, buf(), true);
        } else {
            cr = encoder.flush(buf());
        }
        if (cr.isUnderflow() || cr.isOverflow()) {
            break;
        }
        cr.throwException();
    }
    limit(oldLimit);
    if (position() < end) {
        if (!utf16) {
            put((byte) 0x00);
        } else {
            put((byte) 0x00);
            put((byte) 0x00);
        }
    }
    position(end);
    return this;
}

Example 25 with CharBuffer

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

the class AbstractIoBuffer method putPrefixedString.

/**
     * {@inheritDoc}
     */
@Override
public IoBuffer putPrefixedString(CharSequence val, int prefixLength, int padding, byte padValue, CharsetEncoder encoder) throws CharacterCodingException {
    int maxLength;
    switch(prefixLength) {
        case 1:
            maxLength = 255;
            break;
        case 2:
            maxLength = 65535;
            break;
        case 4:
            maxLength = Integer.MAX_VALUE;
            break;
        default:
            throw new IllegalArgumentException("prefixLength: " + prefixLength);
    }
    if (val.length() > maxLength) {
        throw new IllegalArgumentException("The specified string is too long.");
    }
    if (val.length() == 0) {
        switch(prefixLength) {
            case 1:
                put((byte) 0);
                break;
            case 2:
                putShort((short) 0);
                break;
            case 4:
                putInt(0);
                break;
        }
        return this;
    }
    int padMask;
    switch(padding) {
        case 0:
        case 1:
            padMask = 0;
            break;
        case 2:
            padMask = 1;
            break;
        case 4:
            padMask = 3;
            break;
        default:
            throw new IllegalArgumentException("padding: " + padding);
    }
    CharBuffer in = CharBuffer.wrap(val);
    // make a room for the length field
    skip(prefixLength);
    int oldPos = position();
    encoder.reset();
    int expandedState = 0;
    for (; ; ) {
        CoderResult cr;
        if (in.hasRemaining()) {
            cr = encoder.encode(in, buf(), true);
        } else {
            cr = encoder.flush(buf());
        }
        if (position() - oldPos > maxLength) {
            throw new IllegalArgumentException("The specified string is too long.");
        }
        if (cr.isUnderflow()) {
            break;
        }
        if (cr.isOverflow()) {
            if (isAutoExpand()) {
                switch(expandedState) {
                    case 0:
                        autoExpand((int) Math.ceil(in.remaining() * encoder.averageBytesPerChar()));
                        expandedState++;
                        break;
                    case 1:
                        autoExpand((int) Math.ceil(in.remaining() * encoder.maxBytesPerChar()));
                        expandedState++;
                        break;
                    default:
                        throw new RuntimeException("Expanded by " + (int) Math.ceil(in.remaining() * encoder.maxBytesPerChar()) + " but that wasn't enough for '" + val + "'");
                }
                continue;
            }
        } else {
            expandedState = 0;
        }
        cr.throwException();
    }
    // Write the length field
    fill(padValue, padding - (position() - oldPos & padMask));
    int length = position() - oldPos;
    switch(prefixLength) {
        case 1:
            put(oldPos - 1, (byte) length);
            break;
        case 2:
            putShort(oldPos - 2, (short) length);
            break;
        case 4:
            putInt(oldPos - 4, length);
            break;
    }
    return this;
}