org.gvsig.dwg.lib.readers

Class DwgFileVR2004Reader

java.lang.Object

org.gvsig.dwg.lib.readers.DwgFileVR2004Reader

All Implemented Interfaces:

IDwgFileReader

public class DwgFileVR2004Reader
extends Object
implements IDwgFileReader

Field Summary

Fields

Modifier and Type	Field and Description
protected ByteBuffer	bb
protected DwgFile	dwgFile

Constructor Summary

Constructors

Constructor and Description
DwgFileVR2004Reader()

Method Summary

Modifier and Type	Method and Description
void	read(DwgFile dwgFile, ByteBuffer bb) Reads the DWG version 2004 format
protected ByteBuffer	readCompressedSection(ByteBuffer bb, int compressedSize, int decompressedSize, int checksum)
protected void	readDwgR2004FileHeader(ByteBuffer bb) This function reads the header section of the file, with the encrypted data
protected void	readDwgR2004InfoSection(ByteBuffer bb)
protected DwgObject	readDwgR2004Object(ByteBuffer bb, int offset, int index) Read commun parameters for an Object
protected void	readDwgR2004Objects() Reads all the object referenced in the object map section of the DWG file (using their object file obsets)
protected void	readDwgR2004SectionMap(ByteBuffer bb) Reads the Section Map and fills the Sections Array with the sections found
int	readObjectHeader(int[] data, int offset, DwgObject dwgObject) Reads the header of a dwg object
int	readObjectTailer(int[] data, int offset, DwgObject dwgObject) Reads the tailer of a dwg object.
protected ByteBuffer	readSection(ByteBuffer bb, String name)
protected ByteBuffer	readSystemSection(ByteBuffer bb)

Methods inherited from class java.lang.Object

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

Field Detail

dwgFile

protected DwgFile dwgFile

bb

protected ByteBuffer bb

Constructor Detail

DwgFileVR2004Reader

public DwgFileVR2004Reader()

Method Detail

read

public void read(DwgFile dwgFile,
                 ByteBuffer bb)
          throws IOException

Reads the DWG version 2004 format

Specified by:

read in interface IDwgFileReader

Parameters:

dwgFile - Represents the DWG file that we want to read

bb - Memory mapped byte buffer of the whole DWG file

Throws:

IOException - When DWG file path is wrong

readDwgR2004InfoSection

protected void readDwgR2004InfoSection(ByteBuffer bb)

readDwgR2004FileHeader

protected void readDwgR2004FileHeader(ByteBuffer bb)

This function reads the header section of the file, with the encrypted data

Parameters:

bb - ByteBuffer containing the opened DWG file

readSection

protected ByteBuffer readSection(ByteBuffer bb,
                                 String name)

Parameters:

ByteBuffer - Containing the opened dwg file

compressedSize - size of the compressed data

decompressedSize - size of the decompressed data

CheckSum -

Returns:

the decompressed data of a logical section, joining up all the physical sections belonging to it .

readDwgR2004Objects

protected void readDwgR2004Objects()

Reads all the object referenced in the object map section of the DWG file (using their object file obsets)

readDwgR2004Object

protected DwgObject readDwgR2004Object(ByteBuffer bb,
                                       int offset,
                                       int index)

Read commun parameters for an Object

Parameters:

offset - Object's address

index - object identifier

Returns:

the object

readDwgR2004SectionMap

protected void readDwgR2004SectionMap(ByteBuffer bb)

Reads the Section Map and fills the Sections Array with the sections found

readSystemSection

protected ByteBuffer readSystemSection(ByteBuffer bb)

Parameters:

ByteBuffer - containing the dwg opened file

Returns:

Returns the decompressed data of SectionMap and Section Info.

readCompressedSection

protected ByteBuffer readCompressedSection(ByteBuffer bb,
                                           int compressedSize,
                                           int decompressedSize,
                                           int checksum)

Parameters:

ByteBuffer - Containing the opend dwg file

compressedSize - size of the compressed data

decompressedSize - size of the decompressed data

CheckSum -

Returns:

the decompressed data of a compressed section.

readObjectHeader

public int readObjectHeader(int[] data,
                            int offset,
                            DwgObject dwgObject)
                     throws RuntimeException,
                            CorruptedDwgEntityException

Description copied from interface: IDwgFileReader

Reads the header of a dwg object

Specified by:

readObjectHeader in interface IDwgFileReader

Throws:

RuntimeException

CorruptedDwgEntityException

readObjectTailer

public int readObjectTailer(int[] data,
                            int offset,
                            DwgObject dwgObject)
                     throws RuntimeException,
                            CorruptedDwgEntityException

Description copied from interface: IDwgFileReader

Reads the tailer of a dwg object.

Specified by:

readObjectTailer in interface IDwgFileReader

Throws:

RuntimeException

CorruptedDwgEntityException