Examples with PushbackInputStream java.io.PushbackInputStream used on opensource projects

Example 51 with PushbackInputStream

use of java.io.PushbackInputStream in project neo4j by neo4j.

the class Readables method wrap.

/**
 * Wraps a {@link InputStream} in a {@link CharReadable}.
 *
 * @param stream {@link Reader} to wrap.
 * @param sourceName name or description of the source of the stream.
 * @param charset {@link Charset} to use for reading.
 * @param length total number of bytes provided by the reader.
 * @return a {@link CharReadable} for the {@link Reader}.
 * @throws IOException on I/O error.
 */
public static CharReadable wrap(final InputStream stream, final String sourceName, Charset charset, long length) throws IOException {
    byte[] bytes = new byte[Magic.longest()];
    PushbackInputStream pushbackStream = new PushbackInputStream(stream, bytes.length);
    Charset usedCharset = charset;
    int read = stream.read(bytes);
    if (read >= 0) {
        bytes = read < bytes.length ? Arrays.copyOf(bytes, read) : bytes;
        Magic magic = Magic.of(bytes);
        int excessiveBytes = read;
        if (magic.impliesEncoding()) {
            // Unread the diff between the BOM and the longest magic we gathered bytes for
            excessiveBytes -= magic.length();
            usedCharset = magic.encoding();
        }
        pushbackStream.unread(bytes, read - excessiveBytes, excessiveBytes);
    }
    return wrap(new InputStreamReader(pushbackStream, usedCharset) {

        @Override
        public String toString() {
            return sourceName;
        }
    }, length);
}

Example 52 with PushbackInputStream

use of java.io.PushbackInputStream in project commons by twitter.

the class CompatibilityCodec method deserialize.

@Override
public T deserialize(InputStream source) throws IOException {
    final PushbackInputStream in = new PushbackInputStream(source, prefixLength);
    final byte[] prefix = readAtMostPrefix(in);
    in.unread(prefix);
    return (discriminator.apply(prefix) ? primaryCodec : secondaryCodec).deserialize(in);
}

Example 53 with PushbackInputStream

use of java.io.PushbackInputStream in project beam by apache.

the class AvroSourceTest method testAdvancePastNextSyncMarkerAt.

/**
 * Asserts that advancePastNextSyncMarker advances an input stream past a sync marker and
 * correctly returns the number of bytes consumed from the stream. Creates a haystack of size
 * bytes and places a 16-byte sync marker at the position specified.
 */
private void testAdvancePastNextSyncMarkerAt(int position, int size) throws IOException {
    byte sentinel = (byte) 0xFF;
    byte[] marker = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6 };
    byte[] haystack = createHaystack(marker, position, size);
    PushbackInputStream stream = new PushbackInputStream(new ByteArrayInputStream(haystack), marker.length);
    if (position + marker.length < size) {
        haystack[position + marker.length] = sentinel;
        assertEquals(position + marker.length, AvroReader.advancePastNextSyncMarker(stream, marker));
        assertEquals(sentinel, (byte) stream.read());
    } else {
        assertEquals(size, AvroReader.advancePastNextSyncMarker(stream, marker));
        assertEquals(-1, stream.read());
    }
}

Example 54 with PushbackInputStream

use of java.io.PushbackInputStream in project OpenRefine by OpenRefine.

the class XmlImporter method wrapPrefixRemovingInputStream.

private static final InputStream wrapPrefixRemovingInputStream(InputStream inputStream) throws XMLStreamException, IOException {
    PushbackInputStream pis = new PushbackInputStream(inputStream);
    int b;
    int count = 0;
    while (count < 100 && (b = pis.read()) >= 0) {
        if (++count > 100) {
            throw new XMLStreamException("File starts with too much non-XML content to skip over");
        } else if (b == '<') {
            pis.unread(b);
            break;
        }
    }
    return pis;
}

Example 55 with PushbackInputStream

use of java.io.PushbackInputStream in project j2objc by google.

the class FilterInputStreamNullSourceTest method testPushbackInputStream.

public void testPushbackInputStream() throws IOException {
    assertReadsFailWithIoException(new PushbackInputStream(null));
    assertReadsFailWithIoException(new PushbackInputStream(null, 1024));
}