return key, err
}

// EncryptSinglePart encrypts an io.Reader which must be the
// body of a single-part PUT request.
func EncryptSinglePart(r io.Reader, key ObjectKey) io.Reader {
	r, err := sio.EncryptReader(r, sio.Config{MinVersion: sio.Version20, Key: key[:]})
	if err != nil {
		logger.CriticalIf(context.Background(), errors.New("Unable to encrypt io.Reader using object key"))
	}
	return r
}

 */
public class LineIteratorTest {

    /**
     * @throws Exception
     */
    @Test
    public void test() throws Exception {
        final StringReader reader = new StringReader("aaa\nbbb\nccc\n");
        final LineIterator it = new LineIterator(reader);
        assertThat(it.hasNext(), is(true));
        assertThat(it.next(), is("aaa"));
        assertThat(it.hasNext(), is(true));
        assertThat(it.next(), is("bbb"));

     *
     * @param reader a reader object.
     * @throws IOException IOException if any.
     * @throws XmlPullParserException XmlPullParserException if
     * any.
     * @return CoreExtensions
     */
    public CoreExtensions read(Reader reader) throws IOException, XmlPullParserException {
        return read(reader, true);
    } // -- CoreExtensions read( Reader )

    /**
     * Method read.
     *

var Discard io.Writer = discard{}

// discard is /dev/null for Golang.
type discard struct{}

func (discard) Write(p []byte) (int, error) {
	return len(p), nil
}

// DiscardReader discarded reader
func DiscardReader(r io.Reader) {
	Copy(Discard, r)

	return &Checker{c: rc, r: ioutil.HardLimitReader(rc, length), h: h, want: wantSum}
}

// Read satisfies io.Reader
func (c Checker) Read(p []byte) (n int, err error) {
	n, err = c.r.Read(p)
	if n > 0 {
		c.h.Write(p[:n])
	}
	if errors.Is(err, io.EOF) {
		got := c.h.Sum(nil)
		if !bytes.Equal(got, c.want) {
			return n, ErrInvalidChecksum
		}
		return n, err
	}
	return n, err
}

// Close satisfies io.Closer

 *
 * ESSourceReader reader = new ESSourceReader(client, settings, indexName);
 * reader.setScrollSize(1000); // Set the scroll size
 * reader.setLimitOfDocumentSize(1024 * 1024); // Limit document size to 1MB
 * reader.setQuery(QueryBuilders.termQuery("field", "value")); // Set a query
 *
 * Map<String, Object> document;
 * while ((document = reader.read()) != null) {
 *     // Process the document

    assertThat(inputStream!!.read()).isEqualTo('A'.code)
    assertThat(inputStream.read()).isEqualTo('B'.code)
    assertThat(inputStream.read()).isEqualTo('C'.code)
    assertThat(inputStream.read()).isEqualTo('D'.code)
    assertThat(inputStream.read()).isEqualTo('E'.code)
    assertThat(inputStream.read()).isEqualTo('F'.code)
    assertThat(inputStream.read()).isEqualTo(-1)

    /**
     * Test method for
     * {@link org.codelibs.core.io.PropertiesUtil#load(java.util.Properties, java.io.Reader)}
     * .
     */
    @Test
    public void testLoadPropertiesReaderReaderNull() {
        exception.expect(NullArgumentException.class);
        exception.expectMessage(is("[ECL0008]argument[reader] is null."));
        final InputStreamReader inputStreamReader = null;

        if (readers.hasNext()) {
            final ImageReader reader = readers.next();
            try {
                reader.setInput(input);
                final ImageReadParam param = reader.getDefaultReadParam();
                final int width = reader.getWidth(0);
                final int height = reader.getHeight(0);
                if (width <= 0 || height <= 0) {

func (v Versioning) PrefixesExcluded() bool {
	return len(v.ExcludedPrefixes) > 0 || v.ExcludeFolders
}

// ParseConfig - parses data in given reader to VersioningConfiguration.
func ParseConfig(reader io.Reader) (*Versioning, error) {
	var v Versioning
	if err := xml.NewDecoder(reader).Decode(&v); err != nil {
		return nil, err
	}
	if err := v.Validate(); err != nil {
		return nil, err
	}
	return &v, nil