Package org.pentaho.reporting.libraries.pixie.wmf

Class Buffer

java.lang.Object
org.pentaho.reporting.libraries.pixie.wmf.Buffer
Direct Known Subclasses:
MfHeader, MfRecord
public class Buffer extends Object
A block of raw mmeory. This is used to store various metafile objects as they are read in from file.

  • Constructor Summary

    Constructors
    Modifier
    Constructor
    Description
    protected
    Buffer()
    Default Constructor.
    protected
    Buffer(int length)
    Defines a new buffer with the given initial size in bytes.

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    getByte(int offset)
    Return the 8-bit int at the given byte offset.
    InputStream
    getInputStream(int offset)
    Gets an input stream to read from the memory buffer.
    int
    getInt(int offset)
    Return the 32-bit int at the given byte offset.
    final int
    getLength()
    The size of the stored data in the memory.
    int
    getShort(int offset)
    Return the 16-bit int at the given byte offset.
    String
    getString(int offset, int len)
    Return the null-terminated string at the given byte offset with the given maximum length.
    protected void
    move(int sourceoffset, int length, int targetoffset)
    Moves the buffer contents from the source offset to the target offset, the areas should not overlap.
    void
    read(InputStream in, int offset, int len)
    Read len bytes into the memory from a stream and stores the read bytes at the given offset.
    void
    setByte(int offset, int value)
    Sets the byte at the given offset.
    protected void
    setCapacity(int capacity)
    Ensures that the buffer has enough space for the given number of bytes.
    void
    setInt(int offset, int value)
    Set the int value as big-endian.
    protected void
    setLength(int len)
    Extends the length to the given new size.
    void
    setShort(int offset, int shortval)
    Stores the given short as BigEndian value.
    void
    setString(int offset, String str)
    Writes the given string as byte stream using the plattforms default encoding.

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • Buffer

      protected Buffer()
      Default Constructor. Defines a buffer without an initial size.

    • Buffer

      protected Buffer(int length)
      Defines a new buffer with the given initial size in bytes.
      Parameters:
      length - the length of the buffer in bytes.

  • Method Details

    • getLength

      public final int getLength()
      The size of the stored data in the memory.

    • setLength

      protected void setLength(int len)
      Extends the length to the given new size.
      Parameters:
      len - the new length.
      Throws:
      IllegalArgumentException - if the length is shorter than the used storage in memory.

    • setCapacity

      protected void setCapacity(int capacity)
      Ensures that the buffer has enough space for the given number of bytes.
      Parameters:
      capacity - the new capacity that should be ensured.
      Throws:
      IllegalArgumentException - if the capacity is smaller than the buffers length.

    • read

      public void read(InputStream in, int offset, int len) throws IOException
      Read len bytes into the memory from a stream and stores the read bytes at the given offset.
      Parameters:
      in - the input stream that should be used
      offset - the offset
      len - the number bytes that should be read.
      Throws:
      IOException

    • move

      protected void move(int sourceoffset, int length, int targetoffset)
      Moves the buffer contents from the source offset to the target offset, the areas should not overlap.
      Parameters:
      sourceoffset -
      length -
      targetoffset -

    • setInt

      public void setInt(int offset, int value)
      Set the int value as big-endian.
      Parameters:
      offset - the offset where to set the int value.
      value - the integer value that should be set.

    • getInt

      public int getInt(int offset)
      Return the 32-bit int at the given byte offset.
      Parameters:
      offset - the offset where the integer value is stored in the memory
      Returns:
      the integer.

    • setShort

      public void setShort(int offset, int shortval)
      Stores the given short as BigEndian value.
      Parameters:
      offset - the offset.
      shortval - the shortvalue.

    • getShort

      public int getShort(int offset)
      Return the 16-bit int at the given byte offset.
      Parameters:
      offset - the offset from where to read the short.
      Returns:
      the short.

    • setByte

      public void setByte(int offset, int value)
      Sets the byte at the given offset.
      Parameters:
      offset - the offset.
      value - the byte that should be set.

    • getByte

      public int getByte(int offset)
      Return the 8-bit int at the given byte offset.
      Parameters:
      offset - the offset from where to read the byte
      Returns:
      the byte read.

    • setString

      public void setString(int offset, String str)
      Writes the given string as byte stream using the plattforms default encoding.
      Parameters:
      offset - the offset, where to store the string.
      str - the string that should be stored in the Wmf.

    • getString

      public String getString(int offset, int len)
      Return the null-terminated string at the given byte offset with the given maximum length.
      Parameters:
      offset - the offset where the string starts
      len - the maximum length of the string
      Returns:
      the null-terminated string read.

    • getInputStream

      public InputStream getInputStream(int offset)
      Gets an input stream to read from the memory buffer.
      Parameters:
      offset - the offse, from where to read.
      Returns:
      the InputStream.