Class ReaderInputStream

java.lang.Object

java.io.InputStream

org.postgresql.util.ReaderInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

public class ReaderInputStream
extends InputStream

ReaderInputStream accepts a UTF-16 char stream (Reader) as input and converts it to a UTF-8 byte stream (InputStream) as output.

This is the inverse of java.io.InputStreamReader which converts a binary stream to a character stream.

Field Summary

Fields

Modifier and Type	Field	Description
private final ByteBuffer	bbuf
private final CharBuffer	cbuf
private static final int	DEFAULT_CHAR_BUFFER_SIZE
private final CharsetEncoder	encoder
private boolean	endOfInput	true when all of the characters have been read from the reader into inbuf.
private final byte[]	oneByte
private final Reader	reader

Constructor Summary

Constructors

Constructor	Description
ReaderInputStream(Reader reader)
ReaderInputStream(Reader reader, int charBufferSize)	Allow ReaderInputStreamTest to use small buffers to force UTF-16 surrogate pairs to cross buffer boundaries in interesting ways.

Method Summary

Modifier and Type	Method	Description
private void	advance()
private static void	checkEncodeResult(CoderResult result)
void	close()
int	read()
int	read(byte[] b, int off, int len)

Methods inherited from class InputStream

available, mark, markSupported, nullInputStream, read, readAllBytes, readNBytes, readNBytes, reset, skip, skipNBytes, transferTo

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

DEFAULT_CHAR_BUFFER_SIZE

private static final int DEFAULT_CHAR_BUFFER_SIZE

See Also:

• Constant Field Values

reader

private final Reader reader

encoder

private final CharsetEncoder encoder

bbuf

private final ByteBuffer bbuf

cbuf

private final CharBuffer cbuf

endOfInput

private boolean endOfInput

true when all of the characters have been read from the reader into inbuf.

oneByte

private final byte[] oneByte

Constructor Details

ReaderInputStream

public ReaderInputStream(Reader reader)

ReaderInputStream

ReaderInputStream(Reader reader,
 int charBufferSize)

Allow ReaderInputStreamTest to use small buffers to force UTF-16 surrogate pairs to cross buffer boundaries in interesting ways. Because this constructor is package-private, the unit test must be in the same package.

Method Details

advance

private void advance()
              throws IOException

Throws:

IOException

checkEncodeResult

private static void checkEncodeResult(CoderResult result)
                               throws CharacterCodingException

Throws:

CharacterCodingException

read

public int read()
         throws IOException

Specified by:

read in class InputStream

Throws:

IOException

read

public int read(byte[] b,
 int off,
 int len)
         throws IOException

Overrides:

read in class InputStream

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Overrides:

close in class InputStream

Throws:

IOException