Application: gvSIG desktop

/* jdwglib. Java Library for reading Dwg files.

 *

 * Author: Jose Morell Rama (jose.morell@gmail.com).

 * Port from the Pythoncad Dwg library by Art Haas.

 *

 * Copyright (C) 2005 Jose Morell, IVER TI S.A. and Generalitat Valenciana

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 *

 * For more information, contact:

 *

 * Jose Morell (jose.morell@gmail.com)

 *

 * or

 *

 * IVER TI S.A.

 *  C/Salamanca, 50

 *  46005 Valencia

 *  Spain

 *  +34 963163400

 *  dac@iver.es

 */

package org.gvsig.dwg.lib.readers;

import java.io.IOException;

import java.nio.ByteBuffer;

import java.nio.ByteOrder;

import java.util.ArrayList;

import java.util.List;

import org.gvsig.dwg.lib.ByteUtils;

import org.gvsig.dwg.lib.CorruptedDwgEntityException;

import org.gvsig.dwg.lib.DwgClass;

import org.gvsig.dwg.lib.DwgFile;

import org.gvsig.dwg.lib.DwgHandleReference;

import org.gvsig.dwg.lib.DwgObject;

import org.gvsig.dwg.lib.DwgObjectFactory;

import org.gvsig.dwg.lib.DwgObjectOffset;

import org.gvsig.dwg.lib.DwgUtil;

import org.gvsig.dwg.lib.util.HexUtil;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

/**

 * The DwgFileV15Reader reads the DWG version 15 format

 *

 * @author jmorell

 */

public class DwgFileV15Reader implements IDwgFileReader {

        protected DwgFile dwgFile;

        protected ByteBuffer bb;

        private static Logger logger = LoggerFactory.getLogger(DwgFileV15Reader.class

                        .getName());

        /**

         * Reads the DWG version 15 format

         *

         * @param dwgFile

         *            Represents the DWG file that we want to read

         * @throws IOException

         *             When DWG file path is wrong

         */

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

                this.dwgFile = dwgFile;

                this.bb = bb;

                try {

                        readDwgSectionOffsets();

                        readHeaders();

                        readDwgClasses();

                        readDwgObjectOffsets();

                        readDwgObjects();

                        //checkSuperentities();

                } catch (Exception e) {

                        e.printStackTrace();

                        logger.error(e.getMessage());

                }

        }

        /*

         *TODO: Eliminar esto cuando terminemos con el testeo

         */

        protected void checkSuperentities(){

                logger.info("***** CHEQUEANDO LAS SUPERENTIDADES *****");

                List objects = dwgFile.getDwgObjects();

                DwgObject obj;

                DwgObject superEnt;

                boolean buscado=false;

                boolean perdidos=false;

                int j=0;

                for (int i=0; i<objects.size(); i++){

                        obj = (DwgObject)objects.get(i);

                        if (obj.hasSubEntityHandle()){

                                buscado = true;

                                superEnt = dwgFile.getDwgSuperEntity(obj);

                                if (superEnt == null){

                                        j++;

                                }

                        }

                }

                if(j!=0) {

                        logger.warn("+++++ SE HAN PERDIDO LAS SUPERENTIDADES DE "+ j+" OBJETOS +++++");

                }

                logger.info("***** FIN DEL CHEQUEO DE LAS SUPERENTIDADES *****");

        }

        /**

         * It read the SECTIONS from the header of the DWG file

         */

        protected void readDwgSectionOffsets() {

                bb.position(19);

                bb.order(ByteOrder.LITTLE_ENDIAN);

                short codePage = bb.getShort();

                int count = bb.getInt();

                for (int i = 0; i < count; i++) {

                        byte rec = bb.get();

                        int seek = bb.getInt();

                        int size = bb.getInt();

                        if (rec == 0) {

                                dwgFile.addDwgSectionOffset("HEADERS", seek, size);

                        } else if (rec == 1) {

                                dwgFile.addDwgSectionOffset("CLASSES", seek, size);

                        } else if (rec == 2) {

                                dwgFile.addDwgSectionOffset("OBJECTS", seek, size);

                        } else if (rec == 3) {

                                dwgFile.addDwgSectionOffset("UNKNOWN", seek, size);

                        } else if (rec == 4) {

                                dwgFile.addDwgSectionOffset("R14DATA", seek, size);

                        } else if (rec == 5) {

                                dwgFile.addDwgSectionOffset("R14REC5", seek, size);

                        } else {

                                //                                System.out.println("ERROR: C�digo de n�mero de registro

                                // no soportado: " + rec);

                        }

                }

        }

        /**

         * OpenDWG spec says: This section -object map- is a table which gives the

         * location of each object in the DWG file. This table is broken into

         * sections. It is basically a list of handle/file loc pairs. It could be

         * readed with this pseudocode:

         *

         * Set lastHandle to all 0 and last loc to 0L. Repeat until section size ==

         * 2 section size = read short (in bigendian order) Repeat until out of data

         * for this section offset of this handle form last handle as modular char

         * offset of location in file from last location as modular char End repeat

         * End repeat

         *

         */

        protected void readDwgObjectOffsets() throws Exception {

                int offset = dwgFile.getDwgSectionOffset("OBJECTS");

                bb.position(offset);

                while (true) {

                        bb.order(ByteOrder.BIG_ENDIAN);

                        /*

                         * We read the size of the next section. If size == 2, break (it is

                         * the last empty -except crc- section)

                         */

                        short size = bb.getShort();

                        if (size == 2)

                                break;

                        bb.order(ByteOrder.LITTLE_ENDIAN);

                        byte[] dataBytes = new byte[size];

                        bb.get(dataBytes);

                        int[] data = DwgUtil.bytesToMachineBytes(dataBytes);

                        int lastHandle = 0;

                        int lastLoc = 0;

                        int bitPos = 0;

                        int bitMax = (size - 2) * 8;

                        while (bitPos < bitMax) {

                                ArrayList v = DwgUtil.getModularChar(data, bitPos);

                                bitPos = ((Integer) v.get(0)).intValue();

                                lastHandle = lastHandle + ((Integer) v.get(1)).intValue();

                                v = DwgUtil.getModularChar(data, bitPos);

                                bitPos = ((Integer) v.get(0)).intValue();

                                lastLoc = lastLoc + ((Integer) v.get(1)).intValue();

                                dwgFile.addDwgObjectOffset(lastHandle, lastLoc);

                        }//while

                }//while

        }

        protected void readDwgClasses() throws Exception {

                int offset = dwgFile.getDwgSectionOffset("CLASSES");

                bb.position(offset);

                //1� leemos el sentinnel inicial

                bb.order(ByteOrder.nativeOrder());

                byte[] sentinel = new byte[16];

                bb.get(sentinel);

                if (sentinel[0] != 0x8d)

                        logger.warn("sentinel[0] != 0x8d");

                if (sentinel[1] != 0xa1)

                        logger.warn("sentinel[1] != 0xa1");

                if (sentinel[2] != 0xc4)

                        logger.warn("sentinel[2] != 0xc4");

                if (sentinel[3] != 0xb8)

                        logger.warn("sentinel[3] != 0xb8");

                if (sentinel[4] != 0xc4)

                        logger.warn("sentinel[4] != 0xc4");

                if (sentinel[5] != 0xa9)

                        logger.warn("sentinel[5] != 0xa9");

                if (sentinel[6] != 0xf8)

                        logger.warn("sentinel[6] != 0xf8");

                if (sentinel[7] != 0xc5)

                        logger.warn("sentinel[7] != 0xc5");

                if (sentinel[8] != 0xc0)

                        logger.warn("sentinel[8] != 0xc0");

                if (sentinel[9] != 0xdc)

                        logger.warn("sentinel[9] != 0xdc");

                if (sentinel[10] != 0xf4)

                        logger.warn("sentinel[10] != 0xf4");

                if (sentinel[11] != 0x5f)

                        logger.warn("sentinel[11] != 0x5f");

                if (sentinel[12] != 0xe7)

                        logger.warn("sentinel[12] != 0xe7");

                if (sentinel[13] != 0xcf)

                        logger.warn("sentinel[13] != 0xcf");

                if (sentinel[14] != 0xb6)

                        logger.warn("sentinel[14] != 0xb6");

                if (sentinel[15] != 0x8a)

                        logger.warn("sentinel[15] != 0x8a");

                bb.order(ByteOrder.LITTLE_ENDIAN);

                int size = bb.getInt();

                byte[] data = new byte[size];

                bb.get(data);

                int[] intData = DwgUtil.toIntArray(data);

                short crc = bb.getShort();

                int maxBit = size * 8;

                int bitPos = 0;

                List val = null;

                while ((bitPos + 8) < maxBit) {

                        val = DwgUtil.getBitShort(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        int classNum = ((Integer) val.get(1)).intValue();

                        val = DwgUtil.getBitShort(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        int version = ((Integer) val.get(1)).intValue();

                        val = DwgUtil.getTextString(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        String appName = (String) val.get(1);

                        val = DwgUtil.getTextString(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        String cPlusPlusName = (String) val.get(1);

                        val = DwgUtil.getTextString(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        String dxfName = (String) val.get(1);

                        val = DwgUtil.testBit(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        boolean isZombie = ((Boolean) val.get(1)).booleanValue();

                        val = DwgUtil.getBitShort(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        int id = ((Integer) val.get(1)).intValue();

                        DwgClass dwgClass = new DwgClass(classNum, version, appName,

                                        cPlusPlusName, dxfName, isZombie, id);

                        dwgFile.addDwgClass(dwgClass);

                }//while

                //                Por ultimo, el sentinnel final

                bb.order(ByteOrder.nativeOrder());

                byte[] lastSentinnel = new byte[16];

                bb.get(lastSentinnel);

                if (lastSentinnel[0] != 0x72)

                        logger.warn("lastSentinnel[0] != 0x72");

                if (lastSentinnel[1] != 0x5e)

                        logger.warn("lastSentinnel[1] != 0x5e");

                if (lastSentinnel[2] != 0x3b)

                        logger.warn("lastSentinnel[2] != 0x3b");

                if (lastSentinnel[3] != 0x47)

                        logger.warn("lastSentinnel[3] != 0x47");

                if (lastSentinnel[4] != 0x3b)

                        logger.warn("lastSentinnel[4] != 0x3b");

                if (lastSentinnel[5] != 0x56)

                        logger.warn("lastSentinnel[5] != 0x56");

                if (lastSentinnel[6] != 0x07)

                        logger.warn("lastSentinnel[6] != 0x07");

                if (lastSentinnel[7] != 0x3a)

                        logger.warn("lastSentinnel[7] != 0x3a");

                if (lastSentinnel[8] != 0x3f)

                        logger.warn("lastSentinnel[8] != 0x3f");

                if (lastSentinnel[9] != 0x23)

                        logger.warn("lastSentinnel[9] != 0x23");

                if (lastSentinnel[10] != 0x0b)

                        logger.warn("lastSentinnel[10] != 0x0b");

                if (lastSentinnel[11] != 0xa0)

                        logger.warn("lastSentinnel[11] != 0xa0");

                if (lastSentinnel[12] != 0x18)

                        logger.warn("lastSentinnel[12] != 0x18");

                if (lastSentinnel[13] != 0x30)

                        logger.warn("lastSentinnel[13] != 0x30");

                if (lastSentinnel[14] != 0x49)

                        logger.warn("lastSentinnel[14] != 0x49");

                if (lastSentinnel[15] != 0x75)

                        logger.warn("lastSentinnel[15] != 0x75");

        }

        protected void readDwgClasses2() throws Exception {

                int offset = dwgFile.getDwgSectionOffset("CLASSES");

                // Por ahora nos saltamos los 16 bytes de control

                bb.position(offset + 16);

                bb.order(ByteOrder.LITTLE_ENDIAN);

                int size = bb.getInt();

                byte[] dataBytes = new byte[size];

                for (int i = 0; i < dataBytes.length; i++) {

                        dataBytes[i] = bb.get();

                }

                int[] data = DwgUtil.bytesToMachineBytes(dataBytes);

                for (int i = 0; i < data.length; i++) {

                        data[i] = (byte) ByteUtils.getUnsigned((byte) data[i]);

                }

                bb.position(bb.position() + 2 + 16);

                int maxbit = size * 8;

                int bitPos = 0;

                while ((bitPos + 8) < maxbit) {

                        ArrayList v = DwgUtil.getBitShort(data, bitPos);

                        bitPos = ((Integer) v.get(0)).intValue();

                        v = DwgUtil.getBitShort(data, bitPos);

                        bitPos = ((Integer) v.get(0)).intValue();

                        v = DwgUtil.getTextString(data, bitPos);

                        bitPos = ((Integer) v.get(0)).intValue();

                        v = DwgUtil.getTextString(data, bitPos);

                        bitPos = ((Integer) v.get(0)).intValue();

                        v = DwgUtil.getTextString(data, bitPos);

                        bitPos = ((Integer) v.get(0)).intValue();

                        v = DwgUtil.testBit(data, bitPos);

                        bitPos = ((Integer) v.get(0)).intValue();

                        v = DwgUtil.getBitShort(data, bitPos);

                        bitPos = ((Integer) v.get(0)).intValue();

                }

        }

        /**

         * Reads all the object referenced in the object map section of the DWG file

         * (using their object file obsets)

         */

        protected void readDwgObjects() {

                for (int i = 0; i < dwgFile.getDwgObjectOffsets().size(); i++) {

                                 try{

                                        DwgObjectOffset doo = (DwgObjectOffset) dwgFile

                                                        .getDwgObjectOffsets().get(i);

                                        DwgObject obj = readDwgObject(doo.getOffset(), i);

                                        /*

                                         * azabala: las entidades DWG no implementadas no nos aportan nada

                                         * (aunque la sigo leyendo por si aparecen problemas de puntero de

                                         * fichero) No considero por tanto los DwgObject if (obj != null) {

                                         * dwgFile.addDwgObject(obj); }

                                         *

                                         * paco: propongo reconsiderar esto. Si no cargamos todos los objetos

                                         * podemos tener problemas con las subentities.

                                         */

                                        if (obj != null && obj.getClass() != DwgObject.class) {

                                                dwgFile.addDwgObject(obj);

                                        }

                                }catch(Exception e){

                                        logger.error(e.getMessage());

                                        continue;

                                }

                        }//for

        }

        /**

         * Reads the header of an object in a DWG file Version 15

         *

         * @param data

         *            Array of unsigned bytes obtained from the DWG binary file

         * @param offset

         *            The current bit offset where the value begins

         * @return int New offset

         */

        public int readObjectHeader(int[] data, int offset, DwgObject dwgObject) {

                int bitPos = offset;

                Integer mode = (Integer) DwgUtil.getBits(data, 2, bitPos);

                bitPos = bitPos + 2;

                dwgObject.setMode(mode.intValue());

                /*

                ArrayList v = DwgUtil.getBitLong(data, bitPos);

                bitPos = ((Integer) v.get(0)).intValue();

                int rnum = ((Integer) v.get(1)).intValue();

                dwgObject.setNumReactors(rnum);

                */

                ArrayList v = DwgUtil.getBitShort(data, bitPos);

                bitPos = ((Integer) v.get(0)).intValue();

                int rnum = ((Integer) v.get(1)).intValue();

                dwgObject.setNumReactors(rnum);

                v = DwgUtil.testBit(data, bitPos);

                bitPos = ((Integer) v.get(0)).intValue();

                boolean nolinks = ((Boolean) v.get(1)).booleanValue();

                dwgObject.setNoLinks(nolinks);

                v = DwgUtil.getBitShort(data, bitPos);

                bitPos = ((Integer) v.get(0)).intValue();

                int color = ((Integer) v.get(1)).intValue();

                dwgObject.setColor(color);

                v = DwgUtil.getBitDouble(data, bitPos);

                bitPos = ((Integer) v.get(0)).intValue();

                float ltscale = ((Double) v.get(1)).floatValue();

                Integer ltflag = (Integer) DwgUtil.getBits(data, 2, bitPos);

                bitPos = bitPos + 2;

                Integer psflag = (Integer) DwgUtil.getBits(data, 2, bitPos);

                bitPos = bitPos + 2;

                v = DwgUtil.getBitShort(data, bitPos);

                bitPos = ((Integer) v.get(0)).intValue();

                int invis = ((Integer) v.get(1)).intValue();

                v = DwgUtil.getRawChar(data, bitPos);

                bitPos = ((Integer) v.get(0)).intValue();

                int weight = ((Integer) v.get(1)).intValue();

                return bitPos;

        }

        /**

         * Reads the tail of an object in a DWG file Version 15

         *

         * @param data

         *            Array of bytes obtained from the DWG binary file

         * @param offset

         *            Offset for this array of bytes

         * @return int New offset

         * @throws CorruptedDwgEntityException

         * @throws RuntimeException

         */

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

                int bitPos = offset;

                /*

                 * Subentity ref handle. Esto se aplica sobre VERTEX, ATTRIB, SEQEND

                 */

                if (dwgObject.getMode() == 0x0) {

                        DwgHandleReference subEntityHandle = new DwgHandleReference();

                        bitPos = subEntityHandle.read(data, bitPos);

                        dwgObject.setSubEntityHandle(subEntityHandle);

                }

                /*

                 * Reactors handles TODO No se est�n usando para setear nada en

                 * DwgObject

                 */

                DwgHandleReference reactorHandle;

                for (int i = 0; i < dwgObject.getNumReactors(); i++) {

                        reactorHandle = new DwgHandleReference();

                        bitPos = reactorHandle.read(data, bitPos);

                        dwgObject.addReactorHandle(reactorHandle);

                }

                /*

                 * XDICOBJHANDLE

                 */

                DwgHandleReference xDicObjHandle = new DwgHandleReference();

                bitPos = xDicObjHandle.read(data, bitPos);

                dwgObject.setXDicObjHandle(xDicObjHandle);

                /*

                 * Layer Handle code

                 */

                DwgHandleReference handle = new DwgHandleReference();

                bitPos = handle.read(data, bitPos);

                dwgObject.setLayerHandle(handle);

                if (!dwgObject.isNoLinks()) {

                        DwgHandleReference previousHandle = new DwgHandleReference();

                        bitPos = previousHandle.read(data, bitPos);

                        dwgObject.setPreviousHandle(previousHandle);

                        DwgHandleReference nextHandle = new DwgHandleReference();

                        bitPos = nextHandle.read(data, bitPos);

                        dwgObject.setNextHandle(nextHandle);

                }

                if (dwgObject.getLinetypeFlags() == 0x3) {

                        DwgHandleReference lineTypeHandle = new DwgHandleReference();

                        bitPos = lineTypeHandle.read(data, bitPos);

                        dwgObject.setLineTypeHandle(lineTypeHandle);

                }

                if (dwgObject.getPlotstyleFlags() == 0x3) {

                        DwgHandleReference plotStyleHandle = new DwgHandleReference();

                        bitPos = plotStyleHandle.read(data, bitPos);

                        dwgObject.setPlotStyleHandle(plotStyleHandle);

                }

                return bitPos;

        }

        /**

         * Return a dwg object from its index in the dwg file

         *

         * @param index

         *            of the requested dwg object in the dwg file

         *

         */

        public DwgObject getDwgObjectByIndex(int index) {

                DwgObjectOffset doo = (DwgObjectOffset) dwgFile.getDwgObjectOffsets()

                                .get(index);

                return readDwgObject(doo.getOffset(), index);

        }

        /**

         * Reads a dwg drawing entity (dwg object) given its offset in the file

         */

        protected DwgObject readDwgObject(int offset, int index) {

                DwgObject obj = null;

                try {

                        bb.position(offset);

                        int size = DwgUtil.getModularShort(bb);

                        bb.order(ByteOrder.LITTLE_ENDIAN);

                        byte[] dataBytes = new byte[size];

                        String[] dataMachValString = new String[size];

                        int[] data = new int[size];

                        for (int i = 0; i < size; i++) {

                                dataBytes[i] = bb.get();

                                dataMachValString[i] = HexUtil

                                                .bytesToHex(new byte[] { dataBytes[i] });

                                Integer dataMachValShort = Integer.decode("0x"

                                                + dataMachValString[i]);

                                data[i] = dataMachValShort.byteValue();

                                data[i] = ByteUtils.getUnsigned((byte) data[i]);

                        }

                        int bitPos = 0;

                        ArrayList v = DwgUtil.getBitShort(data, bitPos);

                        bitPos = ((Integer) v.get(0)).intValue();

                        int type = ((Integer) v.get(1)).intValue();

                        obj = DwgObjectFactory.getInstance().create(type, index);

                        if (obj == null) {

                                if (type >= 500) {

                                        int newIndex = type - 500;

                                        if (newIndex < (dwgFile.getDwgClasses().size() - 1)) {

                                                DwgClass dwgClass = (DwgClass) dwgFile.getDwgClasses()

                                                                .get(newIndex);

                                                String dxfEntityName = dwgClass.getDxfName();

                                                obj = DwgObjectFactory.getInstance().create(

                                                                dxfEntityName, index);

                                                if (obj == null) {

                                                        logger.info(dxfEntityName

                                                                        + " todavia no est� implementado");

                                                        return null;

                                                }//if

                                        }//if newIndex

                                        else{

                                                return null;

                                        }

                                }else {

                                        logger.info("Encontrado tipo " + type);

                                        return null;

                                }

                        }//if obj == null

                        v = DwgUtil.getRawLong(data, bitPos);

                        bitPos = ((Integer) v.get(0)).intValue();

                        int objBSize = ((Integer) v.get(1)).intValue();

                        obj.setSizeInBits(objBSize);

                        DwgHandleReference entityHandle = new DwgHandleReference();

                        bitPos = entityHandle.read(data, bitPos);

                        obj.setHandle(entityHandle);

                        v = DwgUtil.readExtendedData(data, bitPos);

                        bitPos = ((Integer) v.get(0)).intValue();

                        ArrayList extData = (ArrayList) v.get(1);

                        obj.setExtendedData(extData);

                        boolean gflag = false;

                        gflag = obj.isGraphicsFlag();

                        if (gflag) {

                                //lee un flag boolean

                                v = DwgUtil.testBit(data, bitPos);

                                bitPos = ((Integer) v.get(0)).intValue();

                                boolean val = ((Boolean) v.get(1)).booleanValue();

                                //si hay imagen asociada, se lee por completo

                                if (val) {

                                        v = DwgUtil.getRawLong(data, bitPos);

                                        bitPos = ((Integer) v.get(0)).intValue();

                                        size = ((Integer) v.get(1)).intValue();

                                        int bgSize = size * 8;

                                        Integer giData = (Integer) DwgUtil.getBits(data, bgSize,

                                                        bitPos);

                                        obj.setGraphicData(giData.intValue());

                                        bitPos = bitPos + bgSize;

                                }

                        }

                                if(obj.getClass() != DwgObject.class)

                                        readSpecificObject(obj, data, bitPos);

                } catch (RuntimeException e) {

                        e.printStackTrace();

                } catch (CorruptedDwgEntityException e) {

                        // TODO Auto-generated catch block

                        e.printStackTrace();

                        return null;

                }

                return obj;

        }

        /*

         * TODO Esto está pesimamente diseñado. Cada objeto DwgObject debe tener un

         * metodo readSpecificObject(data,bitPos)

         *

         */

        protected void readSpecificObject(DwgObject obj, int[] data, int bitPos)

                        throws RuntimeException, CorruptedDwgEntityException {

                        DwgObjectReaderPool pool = DwgObjectReaderPool.getInstance();

                        IDwgObjectReader reader = pool.get(obj, "15");

                        if(reader != null){

                                reader.setFileReader(this);

                                reader.readSpecificObj(data, bitPos, obj);

                        }else{

                                logger.warn("No se ha implementado la lectura de "+obj.getClass().getName()+", code="+obj.getType());

                        }

        }

        //TODO PROBAR, ESTA COPIADO A PELO DE DWG13-14. SI VALE, LLEVAR A UNA

        //CLASE ABSTRACTA

        protected void readHeaders() {

                int offset = dwgFile.getDwgSectionOffset("HEADERS");

                bb.position(offset);

                //1� leemos el sentinnel inicial

                bb.order(ByteOrder.nativeOrder());

                byte[] sentinel = new byte[16];

                bb.get(sentinel);

                if (sentinel[0] != 0xcf)

                        logger.warn("sentinel[0] != 0xcf");

                if (sentinel[1] != 0x7b)

                        logger.warn("sentinel[1] != 0x7b");

                if (sentinel[2] != 0x1f)

                        logger.warn("sentinel[2] != 0x1f");

                if (sentinel[3] != 0x23)

                        logger.warn("sentinel[3] != 0x23");

                if (sentinel[4] != 0xfd)

                        logger.warn("sentinel[4] != 0xfd");

                if (sentinel[5] != 0xde)

                        logger.warn("sentinel[5] != 0xde");

                if (sentinel[6] != 0x38)

                        logger.warn("sentinel[6] != 0x38");

                if (sentinel[7] != 0xa9)

                        logger.warn("sentinel[7] != 0xa9");

                if (sentinel[8] != 0x5f)

                        logger.warn("sentinel[8] != 0x5f");

                if (sentinel[9] != 0x7c)

                        logger.warn("sentinel[9] != 0x7c");

                if (sentinel[10] != 0x68)

                        logger.warn("sentinel[10] != 0x68");

                if (sentinel[11] != 0xb8)

                        logger.warn("sentinel[11] != 0xb8");

                if (sentinel[12] != 0x4e)

                        logger.warn("sentinel[12] != 0x4e");

                if (sentinel[13] != 0x6d)

                        logger.warn("sentinel[13] != 0x6d");

                if (sentinel[14] != 0x33)

                        logger.warn("sentinel[14] != 0x33");

                if (sentinel[15] != 0x5f)

                        logger.warn("sentinel[15] != 0x5f");

                //2� seguidamente leemos los datos

                bb.order(ByteOrder.LITTLE_ENDIAN);

                int size = bb.getInt();

                bb.order(ByteOrder.nativeOrder());

                byte[] data = new byte[size];

                bb.get(data);

                int[] intData = DwgUtil.toIntArray(data);

                //3� a continuacion el CRC de la seccion HEADER

                bb.order(ByteOrder.LITTLE_ENDIAN);

                short crc = bb.getShort();

                //Por ultimo, el sentinnel final

                bb.order(ByteOrder.nativeOrder());

                byte[] lastSentinnel = new byte[16];

                bb.get(lastSentinnel);

                if (lastSentinnel[0] != 0x30)

                        logger.warn("lastSentinnel[0] != 0x30");

                if (lastSentinnel[1] != 0x84)

                        logger.warn("lastSentinnel[1] != 0x84");

                if (lastSentinnel[2] != 0xe0)

                        logger.warn("lastSentinnel[2] != 0xe0");

                if (lastSentinnel[3] != 0xdc)

                        logger.warn("lastSentinnel[3] != 0xdc");

                if (lastSentinnel[4] != 0x02)

                        logger.warn("lastSentinnel[4] != 0x02");

                if (lastSentinnel[5] != 0x21)

                        logger.warn("lastSentinnel[5] != 0x21");

                if (lastSentinnel[6] != 0xc7)

                        logger.warn("lastSentinnel[6] != 0xc7");

                if (lastSentinnel[7] != 0x56)

                        logger.warn("lastSentinnel[7] != 0x56");

                if (lastSentinnel[8] != 0xa0)

                        logger.warn("lastSentinnel[8] != 0xa0");

                if (lastSentinnel[9] != 0x83)

                        logger.warn("lastSentinnel[9] != 0x83");

                if (lastSentinnel[10] != 0x97)

                        logger.warn("lastSentinnel[10] != 0x97");

                if (lastSentinnel[11] != 0x47)

                        logger.warn("lastSentinnel[11] != 0x47");

                if (lastSentinnel[12] != 0xb1)

                        logger.warn("lastSentinnel[12] != 0xb1");

                if (lastSentinnel[13] != 0x92)

                        logger.warn("lastSentinnel[13] != 0x92");

                if (lastSentinnel[14] != 0xcc)

                        logger.warn("lastSentinnel[14] != 0xcc");

                if (lastSentinnel[15] != 0xa0)

                        logger.warn("lastSentinnel[15] != 0xa0");

                //Ahora interpretamos los datos en bruto

                int bitPos = 0;

                try {

                        List val = DwgUtil.getBitDouble(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("VAL1", val.get(1));

                        val = DwgUtil.getBitDouble(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("VAL2", val.get(1));

                        val = DwgUtil.getBitDouble(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("VAL3", val.get(1));

                        val = DwgUtil.getBitDouble(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("VAL4", val.get(1));

                        val = DwgUtil.getTextString(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("STRING1", val.get(1));

                        val = DwgUtil.getTextString(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("STRING2", val.get(1));

                        val = DwgUtil.getTextString(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("STRING3", val.get(1));

                        val = DwgUtil.getTextString(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("STRING4", val.get(1));

                        val = DwgUtil.getBitLong(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("LONG1", val.get(1));

                        val = DwgUtil.getBitLong(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("LONG2", val.get(1));

//                        val = DwgUtil.getBitShort(intData, bitPos);

//                        bitPos = ((Integer) val.get(0)).intValue();

//                        dwgFile.setHeader("SHORT1", val.get(1));

                        //TODO REFACTORIZAR ESTO PARA USAR DWGHANDLEREFERENCE

                        //TODO Los handle se leen asi??

                        val = DwgUtil.getHandle(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("HANDLE1", val.get(1));

                        val = DwgUtil.testBit(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("DIMASO", val.get(1));

                        val = DwgUtil.testBit(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("DIMSHO", val.get(1));

//                        val = DwgUtil.testBit(intData, bitPos);

//                        bitPos = ((Integer) val.get(0)).intValue();

//                        dwgFile.setHeader("DIMSAV", val.get(1));

                        val = DwgUtil.testBit(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("PLINEGEN", val.get(1));

                        val = DwgUtil.testBit(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("ORTHOMODE", val.get(1));

                        val = DwgUtil.testBit(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("REGENMODE", val.get(1));

                        val = DwgUtil.testBit(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("FILLMODE", val.get(1));

                        val = DwgUtil.testBit(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("QTEXTMODE", val.get(1));

                        val = DwgUtil.testBit(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("PSLTSCALE", val.get(1));

                        val = DwgUtil.testBit(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("LIMCHECK", val.get(1));

//                        val = DwgUtil.testBit(intData, bitPos);

//                        bitPos = ((Integer) val.get(0)).intValue();

//                        dwgFile.setHeader("BLIPMODE", val.get(1));

                        val = DwgUtil.testBit(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("USER_TIMER", val.get(1));

                        val = DwgUtil.testBit(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("SKPOLY", val.get(1));

                        val = DwgUtil.testBit(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("ANGDIR", val.get(1));

                        val = DwgUtil.testBit(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("SPLFRAME", val.get(1));

//                        val = DwgUtil.testBit(intData, bitPos);

//                        bitPos = ((Integer) val.get(0)).intValue();

//                        dwgFile.setHeader("ATTREQ", val.get(1));

//

//                        val = DwgUtil.testBit(intData, bitPos);

//                        bitPos = ((Integer) val.get(0)).intValue();

//                        dwgFile.setHeader("ATTDIA", val.get(1));

                        val = DwgUtil.testBit(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("MIRRTEXT", val.get(1));

                        val = DwgUtil.testBit(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("WORLDVIEW", val.get(1));

//                        val = DwgUtil.testBit(intData, bitPos);

//                        bitPos = ((Integer) val.get(0)).intValue();

//                        dwgFile.setHeader("WIREFRAME", val.get(1));

                        val = DwgUtil.testBit(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("TILEMODE", val.get(1));

                        val = DwgUtil.testBit(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("PLIMCHECK", val.get(1));

                        val = DwgUtil.testBit(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("VISRETAIN", val.get(1));

//                        val = DwgUtil.testBit(intData, bitPos);

//                        bitPos = ((Integer) val.get(0)).intValue();

//                        dwgFile.setHeader("DELOBJ", val.get(1));

                        val = DwgUtil.testBit(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("DISPSILH", val.get(1));

                        val = DwgUtil.testBit(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("PELLISE", val.get(1));

                        val = DwgUtil.getBitShort(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

//                        if (dwgFile.getDwgVersion() == "R14")

                        dwgFile.setHeader("PROXYGRAPH", val.get(1));

//                        else

//                                dwgFile.setHeader("SAVEIMAGES", val.get(1));

//                        val = DwgUtil.getBitShort(intData, bitPos);

//                        bitPos = ((Integer) val.get(0)).intValue();

//                        dwgFile.setHeader("DRAGMODE", val.get(1));

                        val = DwgUtil.getBitShort(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("TREEDEPTH", val.get(1));

                        val = DwgUtil.getBitShort(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("LUNITS", val.get(1));

                        val = DwgUtil.getBitShort(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("LUPREC", val.get(1));

                        val = DwgUtil.getBitShort(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("AUNITS", val.get(1));

                        val = DwgUtil.getBitShort(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("AUPREC", val.get(1));

//                        val = DwgUtil.getBitShort(intData, bitPos);

//                        bitPos = ((Integer) val.get(0)).intValue();

//                        dwgFile.setHeader("OSMODE", val.get(1));

                        val = DwgUtil.getBitShort(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("ATTMODE", val.get(1));

//                        val = DwgUtil.getBitShort(intData, bitPos);

//                        bitPos = ((Integer) val.get(0)).intValue();

//                        dwgFile.setHeader("COORDS", val.get(1));

                        val = DwgUtil.getBitShort(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("PDMODE", val.get(1));

//                        val = DwgUtil.getBitShort(intData, bitPos);

//                        bitPos = ((Integer) val.get(0)).intValue();

//                        dwgFile.setHeader("PICKSTYLE", val.get(1));

                        val = DwgUtil.getBitShort(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("USERI1", val.get(1));

                        val = DwgUtil.getBitShort(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("USERI2", val.get(1));

                        val = DwgUtil.getBitShort(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("USERI3", val.get(1));

                        val = DwgUtil.getBitShort(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("USERI4", val.get(1));

                        val = DwgUtil.getBitShort(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("USERI5", val.get(1));

                        val = DwgUtil.getBitShort(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("SPLINESEGS", val.get(1));

                        val = DwgUtil.getBitShort(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("SURFU", val.get(1));

                        val = DwgUtil.getBitShort(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("SURFV", val.get(1));

                        val = DwgUtil.getBitShort(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("SURFTYPE", val.get(1));

                        val = DwgUtil.getBitShort(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("SURFTAB1", val.get(1));

                        val = DwgUtil.getBitShort(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("SURFTAB2", val.get(1));

                        val = DwgUtil.getBitShort(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("SPLINETYPE", val.get(1));

                        val = DwgUtil.getBitShort(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("SHADEDGE", val.get(1));

                        val = DwgUtil.getBitShort(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("SHADEDIF", val.get(1));

                        val = DwgUtil.getBitShort(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("UNITMODE", val.get(1));

                        val = DwgUtil.getBitShort(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("MAXACTVP", val.get(1));

                        val = DwgUtil.getBitShort(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("ISOLINES", val.get(1));

                        val = DwgUtil.getBitShort(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("CMLJUST", val.get(1));

                        val = DwgUtil.getBitShort(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("TEXTQLTY", val.get(1));

                        val = DwgUtil.getBitDouble(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("LTSCALE", val.get(1));

                        val = DwgUtil.getBitDouble(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("TEXTSIZE", val.get(1));

                        val = DwgUtil.getBitDouble(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("TRACEWID", val.get(1));

                        val = DwgUtil.getBitDouble(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("SKETCHINC", val.get(1));

                        val = DwgUtil.getBitDouble(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("FILLETRAD", val.get(1));

                        val = DwgUtil.getBitDouble(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("THICKNESS", val.get(1));

                        val = DwgUtil.getBitDouble(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("ANGBASE", val.get(1));

                        val = DwgUtil.getBitDouble(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("PDSIZE", val.get(1));

                        val = DwgUtil.getBitDouble(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("PLINEWID", val.get(1));

                        val = DwgUtil.getBitDouble(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("USERR1", val.get(1));

                        val = DwgUtil.getBitDouble(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("USERR2", val.get(1));

                        val = DwgUtil.getBitDouble(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("USERR3", val.get(1));

                        val = DwgUtil.getBitDouble(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("USERR4", val.get(1));

                        val = DwgUtil.getBitDouble(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("USERR5", val.get(1));

                        val = DwgUtil.getBitDouble(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("CHAMFERA", val.get(1));

                        val = DwgUtil.getBitDouble(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("CHAMFERB", val.get(1));

                        val = DwgUtil.getBitDouble(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("CHAMFERC", val.get(1));

                        val = DwgUtil.getBitDouble(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("CHAMFERD", val.get(1));

                        val = DwgUtil.getBitDouble(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("FACETRES", val.get(1));

                        val = DwgUtil.getBitDouble(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("CMLSCALE", val.get(1));

                        val = DwgUtil.getBitDouble(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("CELTSCALE", val.get(1));

                        val = DwgUtil.getTextString(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("MENUNAME", val.get(1));

                        int[] tdcreate = new int[2];

                        val = DwgUtil.getBitLong(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        tdcreate[0] = ((Integer) val.get(1)).intValue();

                        val = DwgUtil.getBitLong(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        tdcreate[1] = ((Integer) val.get(1)).intValue();

                        dwgFile.setHeader("TDCREATE", tdcreate);

                        int[] tdupdate = new int[2];

                        val = DwgUtil.getBitLong(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        tdupdate[0] = ((Integer) val.get(1)).intValue();

                        val = DwgUtil.getBitLong(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        tdupdate[1] = ((Integer) val.get(1)).intValue();

                        dwgFile.setHeader("TDUPDATE", tdupdate);

                        int[] tdindwg = new int[2];

                        val = DwgUtil.getBitLong(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        tdindwg[0] = ((Integer) val.get(1)).intValue();

                        val = DwgUtil.getBitLong(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        tdindwg[1] = ((Integer) val.get(1)).intValue();

                        dwgFile.setHeader("TDINDWG", tdindwg);

                        int[] tdusrtime = new int[2];

                        val = DwgUtil.getBitLong(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        tdusrtime[0] = ((Integer) val.get(1)).intValue();

                        val = DwgUtil.getBitLong(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        tdusrtime[1] = ((Integer) val.get(1)).intValue();

                        dwgFile.setHeader("TDUSRTIME", tdusrtime);

                        val = DwgUtil.getBitShort(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        dwgFile.setHeader("CECOLOR", val.get(1));

                        val = DwgUtil.getHandle(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        int intHandle = DwgUtil.handleToInt(val);

                        dwgFile.setHeader("HANDSEED", new Integer(intHandle));

                        //creo que CLAYER marca la capa actualmente seleccionada en el menu

                        // de

                        // autocad

                        val = DwgUtil.getHandle(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        intHandle = DwgUtil.handleToInt(val);

                        dwgFile.setHeader("CLAYER", new Integer(intHandle));

                        val = DwgUtil.getHandle(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        intHandle = DwgUtil.handleToInt(val);

                        dwgFile.setHeader("TEXSTYLE", new Integer(intHandle));

                        val = DwgUtil.getHandle(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        intHandle = DwgUtil.handleToInt(val);

                        dwgFile.setHeader("CELLTYPE", new Integer(intHandle));

                        val = DwgUtil.getHandle(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        intHandle = DwgUtil.handleToInt(val);

                        dwgFile.setHeader("DIMSTYLE", new Integer(intHandle));

                        val = DwgUtil.getHandle(intData, bitPos);

                        bitPos = ((Integer) val.get(0)).intValue();

                        intHandle = DwgUtil.handleToInt(val);

                        dwgFile.setHeader("CMLSTYLE", new Integer(intHandle));

                        //this property is exclusive of DWG 2000

                        val = DwgUtil.getBitDouble(intData, bitPos);