com.jasonclawson.jackson.dataformat.hocon
Class UTF8Reader

java.lang.Object
  java.io.Reader
      com.jasonclawson.jackson.dataformat.hocon.UTF8Reader

All Implemented Interfaces:

Closeable, Readable

public final class UTF8Reader
extends Reader

This code was poached from jackson-dataformat-yaml. https://github.com/FasterXML/jackson-dataformat-yaml com.fasterxml.jackson.dataformat.yaml.UTF8Reader Optimized Reader that reads UTF-8 encoded content from an input stream. In addition to doing (hopefully) optimal conversion, it can also take array of "pre-read" (leftover) bytes; this is necessary when preliminary stream/reader is trying to figure out underlying character encoding.

Field Summary

protected byte[][]	_bufferHolder
protected static ThreadLocal<SoftReference<byte[][]>>	_bufferRecycler This ThreadLocal contains a SoftRerefence to a byte array used for holding content to decode
protected byte[]	_inputBuffer
protected int	_inputEnd Pointed to the end marker, that is, position one after the last valid available byte.
protected int	_inputPtr Pointer to the next available byte (if any), iff less than mByteBufferEnd
protected int	_surrogate Decoded first character of a surrogate pair, if one needs to be buffered

Fields inherited from class java.io.Reader

lock

Constructor Summary

UTF8Reader(byte[] buf, int ptr, int len, boolean autoClose)

UTF8Reader(InputStream in, boolean autoClose)

Method Summary

void	close()
void	freeBuffers() This method should be called along with (or instead of) normal close.
protected InputStream	getStream()
int	read() Although this method is implemented by the base class, AND it should never be called by Woodstox code, let's still implement it bit more efficiently just in case
int	read(char[] cbuf)
int	read(char[] cbuf, int start, int len)
protected int	readBytes() Method for reading as many bytes from the underlying stream as possible (that fit in the buffer), to the beginning of the buffer.
protected int	readBytesAt(int offset) Method for reading as many bytes from the underlying stream as possible (that fit in the buffer considering offset), to the specified offset.
protected void	reportBounds(char[] cbuf, int start, int len)
protected void	reportStrangeStream()

Methods inherited from class java.io.Reader

mark, markSupported, read, ready, reset, skip

Methods inherited from class java.lang.Object

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

Field Detail

_bufferRecycler

protected static final ThreadLocal<SoftReference<byte[][]>> _bufferRecycler

This ThreadLocal contains a SoftRerefence to a byte array used for holding content to decode

_bufferHolder

protected final byte[][] _bufferHolder

_inputBuffer

protected byte[] _inputBuffer

_inputPtr

protected int _inputPtr

Pointer to the next available byte (if any), iff less than mByteBufferEnd

_inputEnd

protected int _inputEnd

Pointed to the end marker, that is, position one after the last valid available byte.

_surrogate

protected int _surrogate

Decoded first character of a surrogate pair, if one needs to be buffered

Constructor Detail

UTF8Reader

public UTF8Reader(InputStream in,
                  boolean autoClose)

UTF8Reader

public UTF8Reader(byte[] buf,
                  int ptr,
                  int len,
                  boolean autoClose)

Method Detail

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in class Reader

Throws:

IOException

read

public int read()
         throws IOException

Although this method is implemented by the base class, AND it should never be called by Woodstox code, let's still implement it bit more efficiently just in case

Overrides:

read in class Reader

Throws:

IOException

read

public int read(char[] cbuf)
         throws IOException

Overrides:

read in class Reader

Throws:

IOException

read

public int read(char[] cbuf,
                int start,
                int len)
         throws IOException

Specified by:

read in class Reader

Throws:

IOException

getStream

protected final InputStream getStream()

readBytes

protected final int readBytes()
                       throws IOException

Method for reading as many bytes from the underlying stream as possible (that fit in the buffer), to the beginning of the buffer.

Throws:

IOException

readBytesAt

protected final int readBytesAt(int offset)
                         throws IOException

Method for reading as many bytes from the underlying stream as possible (that fit in the buffer considering offset), to the specified offset.

Returns:

Number of bytes read, if any; -1 to indicate none available (that is, end of input)

Throws:

IOException

freeBuffers

public final void freeBuffers()

This method should be called along with (or instead of) normal close. After calling this method, no further reads should be tried. Method will try to recycle read buffers (if any).

reportBounds

protected void reportBounds(char[] cbuf,
                            int start,
                            int len)
                     throws IOException

Throws:

IOException

reportStrangeStream

protected void reportStrangeStream()
                            throws IOException

Throws:

IOException