Package com.lowagie.text.pdf

Class ByteBuffer

java.lang.Object
java.io.OutputStream
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.
Author:
Paulo Soares (psoares@consiste.pt)

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    protected byte[]
    buf
    The buffer where the bytes are stored.
    protected int
    count
    The count of bytes in the buffer.
    static boolean
    HIGH_PRECISION
    If true always output floating point numbers with 6 decimal digits.
    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)
     
    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(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(ByteBuffer buf)
    Appends another ByteBuffer to this buffer.
    ByteBuffer
    append(String str)
    Appends a String to the buffer.
    ByteBuffer
    append_i(int b)
    Appends an int.
    ByteBuffer
    appendHex(byte b)
     
    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, 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.

    • ZERO

      public static final byte ZERO
      See Also:

    • 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.

  • 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 -

    • 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()