public void writeLine()

in httpcore5/src/main/java/org/apache/hc/core5/http/impl/nio/SessionOutputBufferImpl.java [159:234]
71 lines of code
16 McCabe index (conditional complexity)

    public void writeLine(final CharArrayBuffer lineBuffer) throws CharacterCodingException {
        if (lineBuffer == null) {
            return;
        }
        setInputMode();
        // Do not bother if the buffer is empty
        if (lineBuffer.length() > 0 ) {
            if (this.charEncoder == null) {
                final int requiredCapacity = buffer().position() + lineBuffer.length();
                ensureCapacity(requiredCapacity);
                if (buffer().hasArray()) {
                    final byte[] b = buffer().array();
                    final int len = lineBuffer.length();
                    final int off = buffer().position();
                    final int arrayOffset = buffer().arrayOffset();
                    for (int i = 0; i < len; i++) {
                        final int c = lineBuffer.charAt(i);
                        b[arrayOffset + off + i] = TextUtils.castAsByte(c);
                    }
                    buffer().position(off + len);
                } else {
                    for (int i = 0; i < lineBuffer.length(); i++) {
                        final int c = lineBuffer.charAt(i);
                        buffer().put(TextUtils.castAsByte(c));
                    }
                }
            } else {
                if (this.charbuffer == null) {
                    this.charbuffer = CharBuffer.allocate(this.lineBufferSize);
                }
                this.charEncoder.reset();
                // transfer the string in small chunks
                int remaining = lineBuffer.length();
                int offset = 0;
                while (remaining > 0) {
                    int l = this.charbuffer.remaining();
                    boolean eol = false;
                    if (remaining <= l) {
                        l = remaining;
                        // terminate the encoding process
                        eol = true;
                    }
                    this.charbuffer.put(lineBuffer.array(), offset, l);
                    this.charbuffer.flip();

                    boolean retry = true;
                    while (retry) {
                        final CoderResult result = this.charEncoder.encode(this.charbuffer, buffer(), eol);
                        if (result.isError()) {
                            result.throwException();
                        }
                        if (result.isOverflow()) {
                            expand();
                        }
                        retry = !result.isUnderflow();
                    }
                    this.charbuffer.compact();
                    offset += l;
                    remaining -= l;
                }
                // flush the encoder
                boolean retry = true;
                while (retry) {
                    final CoderResult result = this.charEncoder.flush(buffer());
                    if (result.isError()) {
                        result.throwException();
                    }
                    if (result.isOverflow()) {
                        expand();
                    }
                    retry = !result.isUnderflow();
                }
            }
        }
        writeCRLF();
    }