org.postgresql.util

Class ReaderInputStream

java.lang.Object

java.io.InputStream

org.postgresql.util.ReaderInputStream

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

public class ReaderInputStream
extends java.io.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 and Description
private java.nio.ByteBuffer	bbuf
private java.nio.CharBuffer	cbuf
private static int	DEFAULT_CHAR_BUFFER_SIZE
private java.nio.charset.CharsetEncoder	encoder
private boolean	endOfInput true when all of the characters have been read from the reader into inbuf.
private byte[]	oneByte
private java.io.Reader	reader
private static java.nio.charset.Charset	UTF_8

Constructor Summary

Constructors

Constructor and Description
ReaderInputStream(java.io.Reader reader)
ReaderInputStream(java.io.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 and Description
private void	advance()
private void	checkEncodeResult(java.nio.charset.CoderResult result)
void	close()
int	read()
int	read(byte[] b, int off, int len)

Methods inherited from class java.io.InputStream

available, mark, markSupported, read, reset, skip

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_CHAR_BUFFER_SIZE

private static final int DEFAULT_CHAR_BUFFER_SIZE

See Also:

Constant Field Values

UTF_8

private static final java.nio.charset.Charset UTF_8

reader

private final java.io.Reader reader

encoder

private final java.nio.charset.CharsetEncoder encoder

bbuf

private final java.nio.ByteBuffer bbuf

cbuf

private final java.nio.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 Detail

ReaderInputStream

public ReaderInputStream(java.io.Reader reader)

ReaderInputStream

ReaderInputStream(java.io.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 Detail

advance

private void advance()
              throws java.io.IOException

Throws:

java.io.IOException

checkEncodeResult

private void checkEncodeResult(java.nio.charset.CoderResult result)
                        throws java.nio.charset.CharacterCodingException

Throws:

java.nio.charset.CharacterCodingException

read

public int read()
         throws java.io.IOException

Specified by:

read in class java.io.InputStream

Throws:

java.io.IOException

read

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

Overrides:

read in class java.io.InputStream

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Overrides:

close in class java.io.InputStream

Throws:

java.io.IOException