Class ByteBuffer

java.lang.Object
java.io.OutputStream
com.gitlab.pdftk_java.com.lowagie.text.pdf.ByteBuffer
All Implemented Interfaces:
Closeable, Flushable, AutoCloseable

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.
  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    protected byte[]
    The buffer where the bytes are stored.
    private static byte[][]
     
    private static int
     
    private static final byte[]
     
    private static final char[]
     
    protected int
    The count of bytes in the buffer.
    static byte
     
  • Constructor Summary

    Constructors
    Constructor
    Description
    Creates new ByteBuffer with capacity 128
    ByteBuffer(int size)
    Creates a byte buffer with a certain capacity.
  • Method Summary

    Modifier and Type
    Method
    Description
    append(byte b)
     
    append(byte[] b)
    Appends an array of bytes.
    append(byte[] b, int off, int len)
    Appends the subarray of the byte array.
    append(char c)
    Appends a char to the buffer.
    append(double d)
    Appends a string representation of a double according to the Pdf conventions.
    append(float i)
    Appends a string representation of a float according to the Pdf conventions.
    append(int i)
    Appends the string representation of an int.
    Appends another ByteBuffer to this buffer.
    Appends a String to the buffer.
    append_i(int b)
    Appends an int.
    appendHex(byte b)
     
    private static byte[]
    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[]
     
    void
    Sets the size to zero.
    static void
    setCacheSize(int size)
    Sets the cache size.
    int
    Returns the current size of the buffer.
    byte[]
    Creates a newly allocated byte array.
    Converts the buffer's contents into a string, translating bytes into characters according to the platform's default character encoding.
    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
    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, nullOutputStream, write

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
  • Field Details

    • 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 byte ZERO
    • chars

      private static final char[] chars
    • bytes

      private static final byte[] bytes
  • Constructor Details

    • 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 Details

    • 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 bytearray
    • 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
      Returns:
      the String representation of the double if d is null. If d 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.
    • 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()