Package org.apache.fontbox.ttf

Class RandomAccessReadUnbufferedDataStream

java.lang.Object

org.apache.fontbox.ttf.TTFDataStream

org.apache.fontbox.ttf.RandomAccessReadUnbufferedDataStream

All Implemented Interfaces:

Closeable, AutoCloseable

class RandomAccessReadUnbufferedDataStream
extends TTFDataStream

In contrast to RandomAccessReadDataStream, this class doesn't pre-load RandomAccessRead into a byte[], it works with RandomAccessRead directly. Performance: it is much faster if most of the buffer is skipped, and slower if whole buffer is read()

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static final class	RandomAccessReadUnbufferedDataStream.RandomAccessReadNonClosingInputStream

Field Summary

Fields

Modifier and Type	Field	Description
private final long	length
private final RandomAccessRead	randomAccessRead

Constructor Summary

Constructors

Constructor	Description
RandomAccessReadUnbufferedDataStream(RandomAccessRead randomAccessRead)

Method Summary

Modifier and Type	Method	Description
void	close()	Close the underlying resources.
RandomAccessRead	createSubView(long length)	Creates a view from current position to pos + length.
long	getCurrentPosition()	Get the current position in the stream.
InputStream	getOriginalData()	Lifetime of returned InputStream is bound by this lifetime, it won't close underlying RandomAccessRead.
long	getOriginalDataSize()	This will get the original data size that was used for this stream.
int	read()	Read an unsigned byte.
int	read(byte[] b, int off, int len)
private int	readInt()
final long	readLong()	Read an unsigned byte.
void	seek(long pos)	Seek into the datasource.

Methods inherited from class org.apache.fontbox.ttf.TTFDataStream

read, read32Fixed, readInternationalDate, readSignedByte, readSignedShort, readString, readString, readTag, readUnsignedByte, readUnsignedByteArray, readUnsignedInt, readUnsignedShort, readUnsignedShortArray

Methods inherited from class java.lang.Object

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

Field Details

length

private final long length

randomAccessRead

private final RandomAccessRead randomAccessRead

Constructor Details

RandomAccessReadUnbufferedDataStream

RandomAccessReadUnbufferedDataStream(RandomAccessRead randomAccessRead)
                              throws IOException

Throws:

IOException - If there is a problem reading the source length.

Method Details

getCurrentPosition

public long getCurrentPosition()
                        throws IOException

Get the current position in the stream.

Specified by:

getCurrentPosition in class TTFDataStream

Returns:

The current position in the stream.

Throws:

IOException - If an error occurs while reading the stream.

close

public void close()
           throws IOException

Close the underlying resources.

Throws:

IOException - If there is an error closing the resources.

read

public int read()
         throws IOException

Read an unsigned byte.

Specified by:

read in class TTFDataStream

Returns:

An unsigned byte.

Throws:

IOException - If there is an error reading the data.

readLong

public final long readLong()
                    throws IOException

Read an unsigned byte.

Specified by:

readLong in class TTFDataStream

Returns:

An unsigned byte.

Throws:

IOException - If there is an error reading the data.

readInt

private int readInt()
             throws IOException

Throws:

IOException

seek

public void seek(long pos)
          throws IOException

Seek into the datasource.

Specified by:

seek in class TTFDataStream

Parameters:

pos - The position to seek to.

Throws:

IOException - If there is an error seeking to that position.

read

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

Specified by:

read in class TTFDataStream

Parameters:

b - The buffer to write to.

off - The offset into the buffer.

len - The length into the buffer.

Returns:

The number of bytes read, or -1 at the end of the stream

Throws:

IOException - If there is an error reading from the stream.

See Also:

• InputStream.read(byte[], int, int)

getOriginalData

public InputStream getOriginalData()
                            throws IOException

Lifetime of returned InputStream is bound by this lifetime, it won't close underlying RandomAccessRead. This will get the original data file that was used for this stream.

Specified by:

getOriginalData in class TTFDataStream

Returns:

The data that was read from.

Throws:

IOException - If there is an issue reading the data.

getOriginalDataSize

public long getOriginalDataSize()

This will get the original data size that was used for this stream.

Specified by:

getOriginalDataSize in class TTFDataStream

Returns:

The size of the original data.

createSubView

public RandomAccessRead createSubView(long length)

Description copied from class: TTFDataStream

Creates a view from current position to pos + length. It can be faster than read(length) if you only need a few bytes. SubView.close() should never close TTFDataStream.this, only itself.

Overrides:

createSubView in class TTFDataStream

Returns:

A view or null (caller can use TTFDataStream.read() instead). Please close() the result