org.apache.pdfbox.io

Class RandomAccessReadBuffer

java.lang.Object

org.apache.pdfbox.io.RandomAccessReadBuffer

All Implemented Interfaces:

Closeable, AutoCloseable, RandomAccessRead

public class RandomAccessReadBuffer
extends Object
implements RandomAccessRead

An implementation of the RandomAccessRead interface to store data in memory. The data will be stored in chunks organized in an ArrayList.

Constructor Summary

Constructors

Constructor and Description
RandomAccessReadBuffer(byte[] input) Create a random access buffer using the given byte array.
RandomAccessReadBuffer(ByteBuffer input) Create a random access buffer using the given ByteBuffer.
RandomAccessReadBuffer(InputStream input) Create a random access read buffer of the given input stream by copying the data.

Method Summary

Modifier and Type	Method and Description
void	close()
RandomAccessReadView	createView(long startPosition, long streamLength) Creates a random access read view starting at the given position with the given length.
long	getPosition() Returns offset of next byte to be returned by a read method.
boolean	isClosed() Returns true if this stream has been closed.
boolean	isEOF() A simple test to see if we are at the end of the data.
long	length() The total number of bytes that are available.
int	read() Read a single byte of data.
int	read(byte[] b, int offset, int length) Read a buffer of data.
void	seek(long position) Seek to a position in the data.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.pdfbox.io.RandomAccessRead

available, peek, read, rewind, skip

Constructor Detail

RandomAccessReadBuffer

public RandomAccessReadBuffer(byte[] input)

Create a random access buffer using the given byte array.

Parameters:

input - the byte array to be read

RandomAccessReadBuffer

public RandomAccessReadBuffer(ByteBuffer input)

Create a random access buffer using the given ByteBuffer.

Parameters:

input - the ByteBuffer to be read

RandomAccessReadBuffer

public RandomAccessReadBuffer(InputStream input)
                       throws IOException

Create a random access read buffer of the given input stream by copying the data.

Parameters:

input - the input stream to be read

Throws:

IOException - if something went wrong while copying the data

Method Detail

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Throws:

IOException

seek

public void seek(long position)
          throws IOException

Seek to a position in the data.

Specified by:

seek in interface RandomAccessRead

Parameters:

position - The position to seek to.

Throws:

IOException - If there is an error while seeking.

getPosition

public long getPosition()
                 throws IOException

Returns offset of next byte to be returned by a read method.

Specified by:

getPosition in interface RandomAccessRead

Returns:

offset of next byte which will be returned with next RandomAccessRead.read() (if no more bytes are left it returns a value >= length of source)

Throws:

IOException

read

public int read()
         throws IOException

Read a single byte of data.

Specified by:

read in interface RandomAccessRead

Returns:

The byte of data that is being read.

Throws:

IOException - If there is an error while reading the data.

read

public int read(byte[] b,
                int offset,
                int length)
         throws IOException

Read a buffer of data.

Specified by:

read in interface RandomAccessRead

Parameters:

b - The buffer to write the data to.

offset - Offset into the buffer to start writing.

length - The amount of data to attempt to read.

Returns:

The number of bytes that were actually read.

Throws:

IOException - If there was an error while reading the data.

length

public long length()
            throws IOException

The total number of bytes that are available.

Specified by:

length in interface RandomAccessRead

Returns:

The number of bytes available.

Throws:

IOException - If there is an IO error while determining the length of the data stream.

isClosed

public boolean isClosed()

Returns true if this stream has been closed.

Specified by:

isClosed in interface RandomAccessRead

isEOF

public boolean isEOF()
              throws IOException

A simple test to see if we are at the end of the data.

Specified by:

isEOF in interface RandomAccessRead

Returns:

true if we are at the end of the data.

Throws:

IOException - If there is an error reading the next byte.

createView

public RandomAccessReadView createView(long startPosition,
                                       long streamLength)
                                throws IOException

Description copied from interface: RandomAccessRead

Creates a random access read view starting at the given position with the given length.

Specified by:

createView in interface RandomAccessRead

Parameters:

startPosition - start position within the underlying random access read

streamLength - stream length

Returns:

the random access read view

Throws:

IOException - if something went wrong when creating the view for the RandomAccessRead