com.itextpdf.text.pdf
Class ByteBuffer

java.lang.Object
  extended by java.io.OutputStream
      extended by com.itextpdf.text.pdf.ByteBuffer
All Implemented Interfaces:
Closeable, Flushable

public class ByteBuffer
extends OutputStream

Acts like a StringBuffer but works with byte arrays. Floating point is converted to a format suitable to the PDF.

Author:
Paulo Soares

Field Summary
protected  byte[] buf
          The buffer where the bytes are stored.
private static byte[][] byteCache
           
private static int byteCacheSize
           
private static byte[] bytes
           
private static char[] chars
           
protected  int count
          The count of bytes in the buffer.
private static DecimalFormatSymbols dfs
           
static boolean HIGH_PRECISION
          If true always output floating point numbers with 6 decimal digits.
static byte ZERO
           
 
Constructor Summary
ByteBuffer()
          Creates new ByteBuffer with capacity 128
ByteBuffer(int size)
          Creates a byte buffer with a certain capacity.
 
Method Summary
 ByteBuffer append_i(int b)
          Appends an int.
 ByteBuffer append(byte b)
           
 ByteBuffer append(byte[] b)
          Appends an array of bytes.
 ByteBuffer append(byte[] b, int off, int len)
          Appends the subarray of the byte array.
 ByteBuffer append(ByteBuffer buf)
          Appends another ByteBuffer to this buffer.
 ByteBuffer append(char c)
          Appends a char to the buffer.
 ByteBuffer append(double d)
          Appends a string representation of a double according to the Pdf conventions.
 ByteBuffer append(float i)
          Appends a string representation of a float according to the Pdf conventions.
 ByteBuffer append(int i)
          Appends the string representation of an int.
 ByteBuffer append(String str)
          Appends a String to the buffer.
 ByteBuffer appendHex(byte b)
           
private static byte[] convertToBytes(int i)
          Converts an double (multiplied by 100 and cast to an int) into an array of bytes.
static void fillCache(int decimals)
          You can fill the cache in advance if you want to.
static String formatDouble(double d)
          Outputs a double into a format suitable for the PDF.
static String formatDouble(double d, ByteBuffer buf)
          Outputs a double into a format suitable for the PDF.
 byte[] getBuffer()
           
 void reset()
          Sets the size to zero.
static void setCacheSize(int size)
          Sets the cache size.
 void setSize(int size)
           
 int size()
          Returns the current size of the buffer.
 byte[] toByteArray()
          Creates a newly allocated byte array.
 String toString()
          Converts the buffer's contents into a string, translating bytes into characters according to the platform's default character encoding.
 String toString(String enc)
          Converts the buffer's contents into a string, translating bytes into characters according to the specified character encoding.
 void write(byte[] b, int off, int len)
           
 void write(int b)
           
 void writeTo(OutputStream out)
          Writes the complete contents of this byte buffer output to the specified output stream argument, as if by calling the output stream's write method using out.write(buf, 0, count).
 
Methods inherited from class java.io.OutputStream
close, flush, write
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Field Detail

count

protected int count
The count of bytes in the buffer.


buf

protected byte[] buf
The buffer where the bytes are stored.


byteCacheSize

private static int byteCacheSize

byteCache

private static byte[][] byteCache

ZERO

public static final byte ZERO
See Also:
Constant Field Values

chars

private static final char[] chars

bytes

private static final byte[] bytes

HIGH_PRECISION

public static boolean HIGH_PRECISION
If true always output floating point numbers with 6 decimal digits. If false uses the faster, although less precise, representation.


dfs

private static final DecimalFormatSymbols dfs
Constructor Detail

ByteBuffer

public ByteBuffer()
Creates new ByteBuffer with capacity 128


ByteBuffer

public ByteBuffer(int size)
Creates a byte buffer with a certain capacity.

Parameters:
size - the initial capacity
Method Detail

setCacheSize

public static void setCacheSize(int size)
Sets the cache size.

This can only be used to increment the size. If the size that is passed through is smaller than the current size, nothing happens.

Parameters:
size - the size of the cache

fillCache

public static void fillCache(int decimals)
You can fill the cache in advance if you want to.

Parameters:
decimals -

convertToBytes

private static byte[] convertToBytes(int i)
Converts an double (multiplied by 100 and cast to an int) into an array of bytes.

Parameters:
i - the int
Returns:
a byte array

append_i

public ByteBuffer append_i(int b)
Appends an int. The size of the array will grow by one.

Parameters:
b - the int to be appended
Returns:
a reference to this ByteBuffer object

append

public ByteBuffer append(byte[] b,
                         int off,
                         int len)
Appends the subarray of the byte array. The buffer will grow by len bytes.

Parameters:
b - the array to be appended
off - the offset to the start of the array
len - the length of bytes to append
Returns:
a reference to this ByteBuffer object

append

public ByteBuffer append(byte[] b)
Appends an array of bytes.

Parameters:
b - the array to be appended
Returns:
a reference to this ByteBuffer object

append

public ByteBuffer append(String str)
Appends a String to the buffer. The String is converted according to the encoding ISO-8859-1.

Parameters:
str - the String to be appended
Returns:
a reference to this ByteBuffer object

append

public ByteBuffer append(char c)
Appends a char to the buffer. The char is converted according to the encoding ISO-8859-1.

Parameters:
c - the char to be appended
Returns:
a reference to this ByteBuffer object

append

public ByteBuffer append(ByteBuffer buf)
Appends another ByteBuffer to this buffer.

Parameters:
buf - the ByteBuffer to be appended
Returns:
a reference to this ByteBuffer object

append

public ByteBuffer append(int i)
Appends the string representation of an int.

Parameters:
i - the int to be appended
Returns:
a reference to this ByteBuffer object

append

public ByteBuffer append(byte b)

appendHex

public ByteBuffer appendHex(byte b)

append

public ByteBuffer append(float i)
Appends a string representation of a float according to the Pdf conventions.

Parameters:
i - the float to be appended
Returns:
a reference to this ByteBuffer object

append

public ByteBuffer append(double d)
Appends a string representation of a double according to the Pdf conventions.

Parameters:
d - the double to be appended
Returns:
a reference to this ByteBuffer object

formatDouble

public static String formatDouble(double d)
Outputs a double into a format suitable for the PDF.

Parameters:
d - a double
Returns:
the String representation of the double

formatDouble

public static String formatDouble(double d,
                                  ByteBuffer buf)
Outputs a double into a format suitable for the PDF.

Parameters:
d - a double
buf - a ByteBuffer
Returns:
the String representation of the double if buf is null. If buf is not null, then the double is appended directly to the buffer and this methods returns null.

reset

public void reset()
Sets the size to zero.


toByteArray

public byte[] toByteArray()
Creates a newly allocated byte array. Its size is the current size of this output stream and the valid contents of the buffer have been copied into it.

Returns:
the current contents of this output stream, as a byte array.

size

public int size()
Returns the current size of the buffer.

Returns:
the value of the count field, which is the number of valid bytes in this byte buffer.

setSize

public void setSize(int size)

toString

public String toString()
Converts the buffer's contents into a string, translating bytes into characters according to the platform's default character encoding.

Overrides:
toString in class Object
Returns:
String translated from the buffer's contents.

toString

public String toString(String enc)
                throws UnsupportedEncodingException
Converts the buffer's contents into a string, translating bytes into characters according to the specified character encoding.

Parameters:
enc - a character-encoding name.
Returns:
String translated from the buffer's contents.
Throws:
UnsupportedEncodingException - If the named encoding is not supported.

writeTo

public void writeTo(OutputStream out)
             throws IOException
Writes the complete contents of this byte buffer output to the specified output stream argument, as if by calling the output stream's write method using out.write(buf, 0, count).

Parameters:
out - the output stream to which to write the data.
Throws:
IOException - if an I/O error occurs.

write

public void write(int b)
           throws IOException
Specified by:
write in class OutputStream
Throws:
IOException

write

public void write(byte[] b,
                  int off,
                  int len)
Overrides:
write in class OutputStream

getBuffer

public byte[] getBuffer()

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