Class ByteBuffer

java.lang.Object
java.io.OutputStream
com.aowagie.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
    private byte[]
    buf
    The buffer where the bytes are stored.
    private static byte[][]
    byteCache
     
    private static int
    byteCacheSize
     
    private static final byte[]
    bytes
     
    private static final char[]
    chars
     
    private int
    count
    The count of bytes in the buffer.
    private static final DecimalFormatSymbols
    dfs
     
    private static boolean
    HIGH_PRECISION
    If true always output floating point numbers with 6 decimal digits.
    private static final byte
    ZERO
     

  • Constructor Summary

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

  • Method Summary

    Modifier and Type
    Method
    Description
    ByteBuffer
    append(byte b)
     
    (package private) ByteBuffer
    append(byte[] b)
    Appends an array of bytes.
    (package private) ByteBuffer
    append(byte[] b, int off, int len)
    Appends the subarray of the byte array.
    (package private) ByteBuffer
    append(char c)
    Appends a char to the buffer.
    private ByteBuffer
    append(double d)
    Appends a string representation of a double according to the Pdf conventions.
    (package private) ByteBuffer
    append(float i)
    Appends a string representation of a float according to the Pdf conventions.
    (package private) ByteBuffer
    append(int i)
    Appends the string representation of an int.
    (package private) ByteBuffer
    append(ByteBuffer buf)
    Appends another ByteBuffer to this buffer.
    (package private) ByteBuffer
    append(String str)
    Appends a String to the buffer.
    ByteBuffer
    append_i(int b)
    Appends an int.
    (package private) 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.
    (package private) static String
    formatDouble(double d)
    Outputs a double into a format suitable for the PDF.
    private static String
    formatDouble(double d, ByteBuffer buf)
    Outputs a double into a format suitable for the PDF.
    byte[]
    getBuffer()
     
    (package private) void
    reset()
    Sets the size to zero.
    void
    setSize(int size)
     
    (package private) 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.
    void
    write(byte[] b, int off, int len)
     
    void
    write(int b)
     
    (package private) 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 OutputStream

    close, flush, nullOutputStream, write

    Methods inherited from class Object

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

  • Field Details

    • count

      private int count
      The count of bytes in the buffer.

    • buf

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

    • byteCacheSize

      private static int byteCacheSize

    • byteCache

      private static byte[][] byteCache

    • ZERO

      private static final byte ZERO
      See Also:

    • chars

      private static final char[] chars

    • bytes

      private static final byte[] bytes

    • HIGH_PRECISION

      private 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 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

    • 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

      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

      ByteBuffer append(byte[] b)
      Appends an array of bytes.
      Parameters:
      b - the array to be appended
      Returns:
      a reference to this ByteBuffer object

    • append

      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

      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

      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

      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

      ByteBuffer appendHex(byte b)

    • append

      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

      private 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

      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

      private 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

      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

      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.

    • writeTo

      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()