com.lowagie.text.pdf
Class RandomAccessFileOrArray

java.lang.Object
  com.lowagie.text.pdf.RandomAccessFileOrArray

All Implemented Interfaces:

DataInput

public class RandomAccessFileOrArray
extends Object
implements DataInput

An implementation of a RandomAccessFile for input only that accepts a file or a byte array as data source.

Author:

Paulo Soares (psoares@consiste.pt)

Field Summary

(package private) byte[]	arrayIn
(package private) int	arrayInPtr
(package private) byte	back
(package private) String	filename
(package private) boolean	isBack
(package private) boolean	plainRandomAccess
(package private) MappedRandomAccessFile	rf
private int	startOffset Holds value of property startOffset.
(package private) RandomAccessFile	trf

Constructor Summary

RandomAccessFileOrArray(byte[] arrayIn)

RandomAccessFileOrArray(InputStream is)

RandomAccessFileOrArray(RandomAccessFileOrArray file)

RandomAccessFileOrArray(String filename)

RandomAccessFileOrArray(String filename, boolean forceRead, boolean plainRandomAccess)

RandomAccessFileOrArray(URL url)

Method Summary

void	close()
int	getFilePointer()
ByteBuffer	getNioByteBuffer()
int	getStartOffset() Getter for property startOffset.
static byte[]	InputStreamToArray(InputStream is)
protected void	insureOpen()
boolean	isOpen()
int	length()
void	pushBack(byte b)
int	read()
int	read(byte[] b)
int	read(byte[] b, int off, int len)
boolean	readBoolean()
byte	readByte()
char	readChar()
char	readCharLE() Reads a Unicode character from this stream in little-endian order.
double	readDouble()
double	readDoubleLE()
float	readFloat()
float	readFloatLE()
void	readFully(byte[] b)
void	readFully(byte[] b, int off, int len)
int	readInt()
int	readIntLE() Reads a signed 32-bit integer from this stream in little-endian order.
String	readLine()
long	readLong()
long	readLongLE()
short	readShort()
short	readShortLE() Reads a signed 16-bit number from this stream in little-endian order.
int	readUnsignedByte()
long	readUnsignedInt() Reads an unsigned 32-bit integer from this stream.
long	readUnsignedIntLE()
int	readUnsignedShort()
int	readUnsignedShortLE() Reads an unsigned 16-bit number from this stream in little-endian order.
String	readUTF()
void	reOpen()
void	seek(int pos)
void	seek(long pos)
void	setStartOffset(int startOffset) Setter for property startOffset.
long	skip(long n)
int	skipBytes(int n)

Methods inherited from class java.lang.Object

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

Field Detail

rf

MappedRandomAccessFile rf

trf

RandomAccessFile trf

plainRandomAccess

boolean plainRandomAccess

filename

String filename

arrayIn

byte[] arrayIn

arrayInPtr

int arrayInPtr

back

byte back

isBack

boolean isBack

startOffset

private int startOffset

Holds value of property startOffset.

Constructor Detail

RandomAccessFileOrArray

public RandomAccessFileOrArray(String filename)
                        throws IOException

Throws:

IOException

RandomAccessFileOrArray

public RandomAccessFileOrArray(String filename,
                               boolean forceRead,
                               boolean plainRandomAccess)
                        throws IOException

Throws:

IOException

RandomAccessFileOrArray

public RandomAccessFileOrArray(URL url)
                        throws IOException

Throws:

IOException

RandomAccessFileOrArray

public RandomAccessFileOrArray(InputStream is)
                        throws IOException

Throws:

IOException

RandomAccessFileOrArray

public RandomAccessFileOrArray(byte[] arrayIn)

RandomAccessFileOrArray

public RandomAccessFileOrArray(RandomAccessFileOrArray file)

Method Detail

InputStreamToArray

public static byte[] InputStreamToArray(InputStream is)
                                 throws IOException

Throws:

IOException

pushBack

public void pushBack(byte b)

read

public int read()
         throws IOException

Throws:

IOException

read

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

Throws:

IOException

read

public int read(byte[] b)
         throws IOException

Throws:

IOException

readFully

public void readFully(byte[] b)
               throws IOException

Specified by:

readFully in interface DataInput

Throws:

IOException

readFully

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

Specified by:

readFully in interface DataInput

Throws:

IOException

skip

public long skip(long n)
          throws IOException

Throws:

IOException

skipBytes

public int skipBytes(int n)
              throws IOException

Specified by:

skipBytes in interface DataInput

Throws:

IOException

reOpen

public void reOpen()
            throws IOException

Throws:

IOException

insureOpen

protected void insureOpen()
                   throws IOException

Throws:

IOException

isOpen

public boolean isOpen()

close

public void close()
           throws IOException

Throws:

IOException

length

public int length()
           throws IOException

Throws:

IOException

seek

public void seek(int pos)
          throws IOException

Throws:

IOException

seek

public void seek(long pos)
          throws IOException

Throws:

IOException

getFilePointer

public int getFilePointer()
                   throws IOException

Throws:

IOException

readBoolean

public boolean readBoolean()
                    throws IOException

Specified by:

readBoolean in interface DataInput

Throws:

IOException

readByte

public byte readByte()
              throws IOException

Specified by:

readByte in interface DataInput

Throws:

IOException

readUnsignedByte

public int readUnsignedByte()
                     throws IOException

Specified by:

readUnsignedByte in interface DataInput

Throws:

IOException

readShort

public short readShort()
                throws IOException

Specified by:

readShort in interface DataInput

Throws:

IOException

readShortLE

public final short readShortLE()
                        throws IOException

Reads a signed 16-bit number from this stream in little-endian order. The method reads two bytes from this stream, starting at the current stream pointer. If the two bytes read, in order, are b1 and b2, where each of the two values is between 0 and 255, inclusive, then the result is equal to:

     (short)((b2 << 8) | b1)
 

This method blocks until the two bytes are read, the end of the stream is detected, or an exception is thrown.

Returns:

the next two bytes of this stream, interpreted as a signed 16-bit number.

Throws:

EOFException - if this stream reaches the end before reading two bytes.

IOException - if an I/O error occurs.

readUnsignedShort

public int readUnsignedShort()
                      throws IOException

Specified by:

readUnsignedShort in interface DataInput

Throws:

IOException

readUnsignedShortLE

public final int readUnsignedShortLE()
                              throws IOException

Reads an unsigned 16-bit number from this stream in little-endian order. This method reads two bytes from the stream, starting at the current stream pointer. If the bytes read, in order, are b1 and b2, where 0 <= b1, b2 <= 255, then the result is equal to:

     (b2 << 8) | b1
 

This method blocks until the two bytes are read, the end of the stream is detected, or an exception is thrown.

Returns:

the next two bytes of this stream, interpreted as an unsigned 16-bit integer.

Throws:

EOFException - if this stream reaches the end before reading two bytes.

IOException - if an I/O error occurs.

readChar

public char readChar()
              throws IOException

Specified by:

readChar in interface DataInput

Throws:

IOException

readCharLE

public final char readCharLE()
                      throws IOException

Reads a Unicode character from this stream in little-endian order. This method reads two bytes from the stream, starting at the current stream pointer. If the bytes read, in order, are b1 and b2, where 0 <= b1, b2 <= 255, then the result is equal to:

     (char)((b2 << 8) | b1)
 

This method blocks until the two bytes are read, the end of the stream is detected, or an exception is thrown.

Returns:

the next two bytes of this stream as a Unicode character.

Throws:

EOFException - if this stream reaches the end before reading two bytes.

IOException - if an I/O error occurs.

readInt

public int readInt()
            throws IOException

Specified by:

readInt in interface DataInput

Throws:

IOException

readIntLE

public final int readIntLE()
                    throws IOException

Reads a signed 32-bit integer from this stream in little-endian order. This method reads 4 bytes from the stream, starting at the current stream pointer. If the bytes read, in order, are b1, b2, b3, and b4, where 0 <= b1, b2, b3, b4 <= 255, then the result is equal to:

     (b4 << 24) | (b3 << 16) + (b2 << 8) + b1
 

This method blocks until the four bytes are read, the end of the stream is detected, or an exception is thrown.

Returns:

the next four bytes of this stream, interpreted as an int.

Throws:

EOFException - if this stream reaches the end before reading four bytes.

IOException - if an I/O error occurs.

readUnsignedInt

public final long readUnsignedInt()
                           throws IOException

Reads an unsigned 32-bit integer from this stream. This method reads 4 bytes from the stream, starting at the current stream pointer. If the bytes read, in order, are b1, b2, b3, and b4, where 0 <= b1, b2, b3, b4 <= 255, then the result is equal to:

     (b1 << 24) | (b2 << 16) + (b3 << 8) + b4
 

This method blocks until the four bytes are read, the end of the stream is detected, or an exception is thrown.

Returns:

the next four bytes of this stream, interpreted as a long.

Throws:

EOFException - if this stream reaches the end before reading four bytes.

IOException - if an I/O error occurs.

readUnsignedIntLE

public final long readUnsignedIntLE()
                             throws IOException

Throws:

IOException

readLong

public long readLong()
              throws IOException

Specified by:

readLong in interface DataInput

Throws:

IOException

readLongLE

public final long readLongLE()
                      throws IOException

Throws:

IOException

readFloat

public float readFloat()
                throws IOException

Specified by:

readFloat in interface DataInput

Throws:

IOException

readFloatLE

public final float readFloatLE()
                        throws IOException

Throws:

IOException

readDouble

public double readDouble()
                  throws IOException

Specified by:

readDouble in interface DataInput

Throws:

IOException

readDoubleLE

public final double readDoubleLE()
                          throws IOException

Throws:

IOException

readLine

public String readLine()
                throws IOException

Specified by:

readLine in interface DataInput

Throws:

IOException

readUTF

public String readUTF()
               throws IOException

Specified by:

readUTF in interface DataInput

Throws:

IOException

getStartOffset

public int getStartOffset()

Getter for property startOffset.

Returns:

Value of property startOffset.

setStartOffset

public void setStartOffset(int startOffset)

Setter for property startOffset.

Parameters:

startOffset - New value of property startOffset.

getNioByteBuffer

public ByteBuffer getNioByteBuffer()
                            throws IOException

Throws:

IOException

Since:

2.0.8