Application: gvSIG desktop » gvSIG data provider for DWG

package org.gvsig.dwg.lib;

import java.io.File;

import java.io.IOException;

import java.net.URL;

import junit.framework.TestCase;

public class DwgFileTest extends TestCase {

	private File baseDataPath;

	protected void setUp() throws Exception {

		super.setUp();

		URL url = this.getClass().getResource("data");

		if (url == null) {

			throw new Exception("Can't find 'data' dir");

		}

		baseDataPath = new File(url.getFile());

		if (!baseDataPath.exists()) {

			throw new Exception("Can't find 'data' dir");

		}

	}

	protected void tearDown() throws Exception {

		super.tearDown();

	}

	public void test1() throws IOException, DwgVersionNotSupportedException {

//		String fileName = baseDataPath.getAbsolutePath()+"/Un punto.dwg";

//		DwgFile dwg = new DwgFile(fileName);

//

//		dwg.read();

//		dwg.calculateGisModelDwgPolylines();

//		dwg.blockManagement();

//		LinkedList dwgObjects = dwg.getDwgObjects();

	}

	public void test2() throws RuntimeException, CorruptedDwgEntityException{

        //Dwg Object that is supposed to be

        //an LWPOLYLINE in V14 version

		/*

        int[] data = new int[]{61,64,64,183,19,227,104,16

                            ,0,5,8,59,72,32,252,47,90,142,

                            234,145,50,10,71,11,213,36,229,

                            162,130,10,228,126,23,174,130,

                            145,50,15,98,141,196,244,229,

                            162,130,12,126,23,169,66,58,

                            145,50,12,47,90,138,68,229,

                            162,130,8,0,0,4,7,74,137,50,

                            15,177,66,231,252,221,162,130,

                            9,130,151,21,242,151,21,190,

                            8,21,8,56};

         */

//		int[] data = new int[]{62,128,64,71,99,

//							   40,48,0,5,8,27,72,

//							   100,126,23,169,68,

//							   178,105,50,13,114,

//							   63,11,82,165,162,130,

//							   13,114,63,11,210,138,

//							   105,50,8,173,114,59,

//							   138,205,162,130,15,98,

//							   141,192,241,58,105,50,

//							   11,51,51,52,178,229,162,

//							   130,14,110,102,98,97,234,

//							   105,50,11,51,51,52,179,21,

//							   162,130,10,149,192,240,42,

//							   162,105,50,14,189,27,131,

//							   107,69,162,130,14,31,169,

//							   66,227,74,105,50,9,240,86,

//							   185,27,117,162,130,11,59,

//							   51,51,52,234,105,50,13,114,

//							   63,11,83,85,162,130,9,74,228,

//							   126,22,186,105,50,11,51,51,50,

//							   51,53,162,130,11,137,232,82,190,

//							   58,105,50,9,74,228,122,147,13,162,

//							   130,11,137,232,82,189,106,105,50,9,

//							   74,228,122,146,213,162,130,9,74,228,122,20,202,105,50,12,126,23,171,194,173,162,130,12,126,23,169,68,178,105,50,13,114,63,11,82,165,162,130,9,130,151,22,10,136,182,8,21,8,120};

//        //1er intento: suponemos que la LWPOLYLINE cumple la especificaci?n

//        //a rajatabla

//        int bitPos = 0;

//        List val = DwgUtil.getBitShort(data, bitPos);

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

//        int type = ((Integer) val.get(1)).intValue();

//        System.out.println("type = " + type);

//

//        DwgHandleReference hr = new DwgHandleReference();

//        bitPos = hr.read(data, bitPos);

//        System.out.println("handle, code="+

//                    hr.getCode()+

//                    " ,offset="+

//                    hr.getOffset());

//

//        //Ahora pasamos a la extended data

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

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

//        int extendedDataSize = ((Integer) val.get(1)).intValue();

//        System.out.println("EED size="+extendedDataSize);

//        //como el size es 0, me lo salto

//

//        //ver si tiene datos graficos

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

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

//        boolean hasGraphicsData = ((Boolean) val.get(1))

//                .booleanValue();

//        System.out.println("graphics = "+hasGraphicsData);

//

//        //como se que no hay graphics me lo salto

//        //tama?o en bits

//        val = DwgUtil.getRawLong(data, bitPos);

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

//        int sizeInBits = ((Integer) val.get(1)).intValue();

//        System.out.println("sizeInBits = "+sizeInBits);

//

//        /*

//         * Ahora, lo que viene es lo que en la spec se dice

//         * "Common entity data". Revisar bien pues PythonCAD no lo lee

//         * como en la spec.

//         *

//         * pag 42.

//          R13-R14 Only:

//          	RL	:	Size of object data in bits

//          	6B	:	Flags (FEDCBA)

//          	6B	:	Common parameters (CCSSII)

//          	Segun esto, deberia leer 6 bits y 6 bits

//

//          	FLAGS

//	      	Mas adelante (pag 43), dice:

//	      	DC	:	This is the number of reactors attached to an

//	      	entity as a bitshort.

//	      	This feature may have been dormant in R13,

//	      	but it appears in R14, and in files saved as R13 by R14.

//

//	      	Ahora bien, pythoncad las est? leyendo como bitLong

//          	?En que quedamos, son 2 bits, 1 bitLong o 1 bitShort?

//          	TODO REVISAR

//

//          	COMMON PARAMETERS

//          	Al principio, dice que son 6 bits (CC, SS, II)

//          	pero luego dice (pag 43):

//          	CC	:	Color bitshort

//          	SS	:	Linetype scale bitdouble

//          	II	:	"Invisible" flag bitshort

//

//			Pythoncad, en vez de como 2 bits, los est? leyendo

//			como BitShort, BitDouble y BitShort

//

//         * */

//

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

//		bitPos += 2;

//		System.out.println("mode = "+mode);

//

//	/*

//		val = DwgUtil.getBitLong(data, bitPos);

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

//		int rnum = ((Integer) val.get(1)).intValue();

//		System.out.println("numReactors = "+rnum);

//*/

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

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

//		int rnum = ((Integer) val.get(1)).intValue();

//		System.out.println("numReactors = "+rnum);

//

//

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

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

//		boolean isLyrByLineType = ((Boolean) val.get(1)).booleanValue();

//		System.out.println("isLyrByLineType="+isLyrByLineType);

//

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

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

//		boolean noLinks = ((Boolean) val.get(1)).booleanValue();

//		System.out.println("noLinks="+noLinks);

//

//

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

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

//		int color = ((Integer) val.get(1)).intValue();

//		System.out.println("color="+color);

//

//

//		val = DwgUtil.getBitDouble(data, bitPos);

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

//		float ltscale = ((Double) val.get(1)).floatValue();

//		System.out.println("ltscale="+ltscale);

//

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

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

//		int invis = ((Integer) val.get(1)).intValue();

//		System.out.println("invis="+invis);

//

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

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

//		int flag = ((Integer) val.get(1)).intValue();

//		System.out.println("flag="+flag);

//

//		double dVal = 0d;

//		if((flag & 0x4) > 0){

//			val = DwgUtil.getBitDouble(data, bitPos);

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

//			dVal = ((Double) val.get(1)).doubleValue();

//		}

//		System.out.println("constWidth="+dVal);

//

//		dVal = 0d;

//		if((flag & 0x8) > 0){

//			val = DwgUtil.getBitDouble(data, bitPos);

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

//			dVal = ((Double) val.get(1)).doubleValue();

//		}

//		System.out.println("elevation="+dVal);

//

//		dVal = 0d;

//		if ((flag & 0x2) > 0){

//			val = DwgUtil.getBitDouble(data, bitPos);

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

//			dVal = ((Double) val.get(1)).doubleValue();

//		}

//		System.out.println("thickness="+dVal);

//

//		double x, y, z ;

//		x = 0d;

//		y = 0d;

//		z = 0d;

//

//		if ((flag & 0x1) > 0){

//			val = DwgUtil.getBitDouble(data, bitPos);

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

//			x = ((Double) val.get(1)).doubleValue();

//

//			val = DwgUtil.getBitDouble(data, bitPos);

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

//			y = ((Double) val.get(1)).doubleValue();

//

//			val = DwgUtil.getBitDouble(data, bitPos);

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

//			z = ((Double) val.get(1)).doubleValue();

//		}

//		System.out.println("normal="+x+","+y+","+z);

//

//		val = DwgUtil.getBitLong(data, bitPos);

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

//		int np = ((Integer) val.get(1)).intValue();

//		System.out.println("numPoints="+np);

//

//		int nb = 0;

//		if((flag & 0x10) > 0){

//			val = DwgUtil.getBitLong(data, bitPos);

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

//			nb = ((Integer) val.get(1)).intValue();

//		}

//		System.out.println("numBulges="+nb);

//		int nw = 0;

//		if((flag & 0x20) > 0){

//			val = DwgUtil.getBitLong(data, bitPos);

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

//			nw = ((Integer) val.get(1)).intValue();

//		}

//		System.out.println("numWidths="+nw);

//		if(np > 0){

//			Point2D[] points = new Point2D[np];

//			for(int i = 0; i < np; i++){

//				val = DwgUtil.getRawDouble(data, bitPos);

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

//				x = ((Double) val.get(1)).doubleValue();

//

//				val = DwgUtil.getRawDouble(data, bitPos);

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

//				y = ((Double) val.get(1)).doubleValue();

//

//				points[i] = new Point2D.Double(x, y);

//				System.out.println("Punto"+i+"="+x+","+y);

//			}//for

//		}//if np

//

//		if(nb > 0){

//			double[] bulges = new double[nb];

//			for(int i = 0; i < nb; i++){

//				val = DwgUtil.getRawDouble(data, bitPos);

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

//				bulges[i] = ((Double) val.get(1)).doubleValue();

//				System.out.println("Bulge"+i+"="+bulges[i]);

//			}//for

//

//		}//if nb

//

//		if(nw > 0){

//			double[][] widths = new double[nw][2];

//			for(int i = 0; i < nw; i++){

//				val = DwgUtil.getBitDouble(data, bitPos);

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

//				double sw = ((Double) val.get(1)).doubleValue();

//

//				val = DwgUtil.getBitDouble(data, bitPos);

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

//				double ew = ((Double) val.get(1)).doubleValue();

//

//				widths[i][0] = sw;

//				widths[i][1] = ew;

//				System.out.println("Width"+i+"="+sw+","+ew);

//			}//for

//		}

     }

	public void test3(){

		//test of extrusion

		double[] coord = null;

		double[] extrusion = null;

		double[] extrusion2 = new double[]{0, 0, 1};

		coord = new double[]{790089.65, 4477974.75, 9.560000000114087};

		extrusion = new double[]{-0.5037965987025721, 0.07005064807841195, 0.8609772899673451};

		//1. algoritmo original, vector normal distinto

//		double[] newCoord = AcadExtrusionCalculator.extrude(coord, extrusion);

//		newCoord = AcadExtrusionCalculator.extrude3(coord, extrusion);

//

		//2? ahora con vector normal coincidente con eje Z

//		newCoord = AcadExtrusionCalculator.extrude(coord, extrusion2);

//		newCoord = AcadExtrusionCalculator.extrude3(coord, extrusion2);

	}

}

/*

 * Created on 08-feb-2007

 *

 * gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2004 IVER T.I. 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:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib??ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   IVER T.I. S.A

 *   Salamanca 50

 *   46005 Valencia

 *   Spain

 *

 *   +34 963163400

 *   dac@iver.es

 */

/* CVS MESSAGES:

*

* $Id: DwgTestSuite.java 28970 2009-05-25 13:27:14Z jmvivo $

* $Log$

* Revision 1.1.2.1  2007-02-28 07:35:10  jmvivo

* Actualizado desde el HEAD.

*

* Revision 1.1  2007/02/08 20:27:57  azabala

* *** empty log message ***

*

*

*/

package org.gvsig.dwg.lib;

import junit.framework.Test;

import junit.framework.TestSuite;

public class DwgTestSuite {

	public static Test suite() {

		TestSuite suite = new TestSuite("Test for com.iver.cit.jdwglib.dwg");

		//$JUnit-BEGIN$

		suite.addTestSuite(DwgFileTest.class);

		//$JUnit-END$

		return suite;

	}

}

/* jdwglib. Java Library for reading Dwg files.

 *

 * Author: Equipo de desarrollo de gvSIG.

 * Port from the Pythoncad Dwg library by Art Haas.

 *

 * Copyright (C) 2007 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:

 *

 * IVER TI S.A.

 *  C/Salamanca, 50

 *  46005 Valencia

 *  Spain

 *  +34 963163400

 *  dac@iver.es

 */package org.gvsig.dwg.lib;

import java.util.ArrayList;

public class DwgHandleReference {

	private Integer code=null;

	private Integer offset=null;

	private Integer counter=null;

	public DwgHandleReference(int code, int offset){

		this.code=new Integer(code);

		this.offset=new Integer(offset);

	}

	public DwgHandleReference(){

	}

	public void setCode(int code){

		this.code = new Integer(code);

	}

	public void setOffset(int offset){

		this.offset=new Integer(offset);

	}

	public int getCode(){

		return this.code.intValue();

	}

	public int getOffset(){

		return this.offset.intValue();

	}

	public int getCounter(){

		return this.counter.intValue();

	}

	public void setCounter(int counter){

		this.counter=new Integer(counter);

	}

	/**

	 * Read a pair of int values (the HandleCode and HandleOffset of a handle of a DWG object)

	 * from a group of unsigned bytes and initializes the properties.

	 *

	 * @param data Array of unsigned bytes obtained from the DWG binary file

	 * @param offset The current bit offset where the value begins

	 * @throws Exception If an unexpected bit value is found in the DWG file. Occurs

	 * 		   when we are looking for LwPolylines.

	 * @return int Represents the new offset.

	 *

	 * 	 */

	public int read(int[] data, int offset) throws RuntimeException, CorruptedDwgEntityException{

		ArrayList v = new ArrayList();

		int code = ((Integer)DwgUtil.getBits(data, 4, offset)).intValue();

		int counter = ((Integer)DwgUtil.getBits(data, 4, (offset + 4))).intValue();

		int read = 8;

		ArrayList hlist = new ArrayList();

		if (counter>0) {

			int hlen = counter * 8;

			Object handle = DwgUtil.getBits(data, hlen, (offset + 8));

			read = read + hlen;

			if (hlen > 8) {

				byte[] handleBytes = (byte[])handle;

				int[] handleInts = new int[handleBytes.length];

				// Hacerlos unsigned ...

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

					handleInts[i] = ByteUtils.getUnsigned(handleBytes[i]);

				}

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

					hlist.add(new Integer(handleInts[i]));

				}

			} else {

				hlist.add(handle);

			}

		}

		v.add(new Integer(code));

		v.add(new Integer(counter));

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

			v.add(hlist.get(i));

		}

		setCode(code);

		setCounter(counter);

		setOffset(DwgUtil.handleBinToHandleInt(v));

		return offset+read;

	}

}

/* 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;

/**

 * The DwgSectionOffset class is useful to store the key of a DWG section with its seek

 * (or offset) and with its size

 * 

 * @author jmorell

 */

public class DwgSectionOffset {

	private String key;

	private int seek;

	private int size;

	/**

	 * Creates a new DwgSectionOffset object

	 * 

	 * @param key Section key

	 * @param seek Seeker or offset in the DWG file for this section

	 * @param size Size of this section

	 */

	public DwgSectionOffset(String key, int seek, int size) {

		this.key = key;

		this.seek = seek;

		this.size = size;

	}

    /**

     * @return Returns the key.

     */

    public String getKey() {

        return key;

    }

    /**

     * @param key The key to set.

     */

    public void setKey(String key) {

        this.key = key;

    }

    /**

     * @return Returns the seek.

     */

    public int getSeek() {

        return seek;

    }

    /**

     * @param seek The seek to set.

     */

    public void setSeek(int seek) {

        this.seek = seek;

    }

}

package org.gvsig.dwg.lib;

public class DwgClass2004 extends DwgClass {

	int numberObject;

	int maintenanceVersion;

	int DwgVersion;

	int unknown1;

	int unknown2;

	public DwgClass2004(int classNum, int version, String appName, String cPlusPlusName,

			String dxfName, boolean isZombie, int id, int numberObject,

			int maintenanceVersion,int DwgVersion,int unknown1, int unknown2) {

		super( classNum, version,  appName,

    		 cPlusPlusName, dxfName, isZombie, id);

        this.numberObject = numberObject;

        this.maintenanceVersion = maintenanceVersion;

        this.DwgVersion = DwgVersion;

        this.unknown1 = unknown1;

        this.unknown2 = unknown2;

	}

	public String toString(){

    	String solution = "";

    	solution += "classNum ="+classNum;

    	solution += ", version = "+version;

    	solution += ", appName = "+appName;

    	solution += ", c++Name = "+cPlusPlusName;

    	solution += ", dxfName = "+dxfName;

    	solution += ", isZombie = " + isZombie;

    	solution += ", numberObject = " + numberObject;

    	solution += ", maintenanceVersion = " + maintenanceVersion;

    	solution += ", DwgVersion = " + DwgVersion;

    	solution += ", unknown1 = " + unknown1;

    	solution += ", unknown2 = " + unknown2;

    	return solution;

    }

	/**

	 * @return Returns the numberObject.

	 */

	public int getNumberObject() {

		return numberObject;

	}

	/**

	 * @param numberObject The numberObject to set.

	 */

	public void setNumberObject(int numberObject) {

		this.numberObject = numberObject;

	}

	/**

	 * @return Returns the maintenanceVersion.

	 */

	public int getMaintenanceVersion() {

		return maintenanceVersion;

	}

	/**

	 * @param maintenanceVersion The maintenanceVersion to set.

	 */

	public void setMaintenanceVersion(int maintenanceVersion) {

		this.maintenanceVersion = maintenanceVersion;

	}

	/**

	 * @return Returns the DwgVersion.

	 */

	public int getDwgVersion() {

		return DwgVersion;

	}

	/**

	 * @param DwgVersion The DwgVersion to set.

	 */

	public void setDwgVersion(int DwgVersion) {

		this.DwgVersion = DwgVersion;

	}

}

/* 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;

import java.nio.ByteBuffer;

import java.nio.ByteOrder;

import java.util.ArrayList;

import java.util.List;

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

/**

 * The DwgUtil class contains the essential set of functions for reading bitstreams

 * in DWG files

 *

 * @author jmorell

 */

public final class DwgUtil {

	/**

	 * Read the extended data for a DWG object

	 * Don't use in this version. Serious bugs detected

	 *

	 * @param data Array of unsigned bytes obtained from the DWG binary file

	 * @param offset The current bit offset where the value begins

	 * @throws RuntimeException If an unexpected bit value is found in the DWG file. Occurs

	 *             when we are looking for LwPolylines.

	 * @return ArrayList This ArrayList has two parts. First is an int value that represents

	 * 		   the new offset, and second is the extended data of a DWG object

	 */

	public static ArrayList readExtendedData(int[] data, int offset) throws RuntimeException {

		int bitPos = offset;

		ArrayList extData = new ArrayList();

		while (true) {

			int newBitPos = ((Integer)getBitShort(data, bitPos).get(0)).intValue();

			int size = ((Integer) getBitShort(data, bitPos).get(1)).intValue();

			bitPos = newBitPos;

			if (size == 0) {

				break;

			}

			newBitPos = ((Integer)((ArrayList)getHandle(data, bitPos)).get(0)).intValue();

			// TODO: Esto no es correcto. Repasar ...

			int handle = ((Integer)((ArrayList)getHandle(data, bitPos)).get(1)).intValue();

			bitPos = newBitPos;

			ArrayList eedata = new ArrayList();

			while (size > 0) {

				newBitPos = ((Integer)getRawChar(data, bitPos).get(0)).intValue();

				int cb = ((Integer) getRawChar(data, bitPos).get(1)).intValue();

				bitPos = newBitPos;

				size = size - 1;

				if (cb == 0x0) {

					newBitPos = ((Integer)getRawChar(data, bitPos).get(0)).intValue();

					int len = ((Integer)getRawChar(data, bitPos).get(1)).intValue();

					bitPos = newBitPos;

					newBitPos = ((Integer)getRawShort(data, bitPos).get(0)).intValue();

					int cp = ((Integer)getRawShort(data, bitPos).get(1)).intValue();

					bitPos = newBitPos;

					ArrayList chars = new ArrayList();

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

						newBitPos = ((Integer)getRawChar(data, bitPos).get(0)).intValue();

						int charr = ((Integer)getRawChar(data, bitPos).get(1)).intValue();

						bitPos = newBitPos;

						// �int o char?

						chars.add(new Integer(charr));

					}

					// Incorrecto. Repasar ...

					eedata.add(chars);

					size = size - len - 3;

				} else if (cb == 0x1) {

					System.out.println("Invalid EXX code byte: 0x1");

				} else if (cb == 0x2) {

					newBitPos = ((Integer)getRawChar(data, bitPos).get(0)).intValue();

					int charr = ((Integer)getRawChar(data, bitPos).get(1)).intValue();

					bitPos = newBitPos;

					if (charr == 0x0) {

						eedata.add("{");

					} else if (charr == 0x1) {

						eedata.add("}");

					} else {

						System.out.println("Unexpected EXX char: " + charr);

					}

					size = size - 1;

				} else if (cb == 0x3 || cb == 0x5) {

					ArrayList chars = new ArrayList();

					for (int i = 0; i < 8; i++) {

						newBitPos = ((Integer)getRawChar(data, bitPos).get(0)).intValue();

						int charr = ((Integer)getRawChar(data, bitPos).get(1)).intValue();

						bitPos = newBitPos;

						chars.add(new Integer(charr));

					}

					eedata.add(chars);

					size = size - 8;

				} else if (cb == 0x4) {

					newBitPos = ((Integer)getRawChar(data, bitPos).get(0)).intValue();

					int len = ((Integer)getRawChar(data, bitPos).get(1)).intValue();

					bitPos = newBitPos;

					ArrayList chars = new ArrayList();

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

						newBitPos = ((Integer)getRawChar(data, bitPos).get(0)).intValue();

						int charr = ((Integer)getRawChar(data, bitPos).get(1)).intValue();

						bitPos = newBitPos;

						chars.add(new Integer(charr));

					}

					eedata.add(chars);

					size = size - len - 1;

				} else if (0xa <= cb && cb <= 0xd) {

					newBitPos = ((Integer)((ArrayList)getRawDouble(data, bitPos)).get(0)).intValue();

					double d1 = ((Double)((ArrayList)getRawDouble(data, bitPos)).get(1)).doubleValue();

					bitPos = newBitPos;

					newBitPos = ((Integer)((ArrayList)getRawDouble(data, bitPos)).get(0)).intValue();

					double d2 = ((Double)((ArrayList)getRawDouble(data, bitPos)).get(1)).doubleValue();

					bitPos = newBitPos;

					newBitPos = ((Integer)((ArrayList)getRawDouble(data, bitPos)).get(0)).intValue();

					double d3 = ((Double)((ArrayList)getRawDouble(data, bitPos)).get(1)).doubleValue();

					bitPos = newBitPos;

					eedata.add(new double[] { d1, d2, d3 });

					size = size - 24;

				} else if (0x28 <= cb && cb <= 0x2a) {

					newBitPos = ((Integer)((ArrayList)getRawDouble(data, bitPos)).get(0)).intValue();

					double d = ((Double)((ArrayList)getRawDouble(data, bitPos)).get(1)).doubleValue();

					bitPos = newBitPos;

					eedata.add(new Double(d));

					size = size - 8;

				} else if (cb == 0x46) {

					newBitPos = ((Integer)getRawShort(data, bitPos).get(0)).intValue();

					int shortt = ((Integer)getRawShort(data, bitPos).get(1)).intValue();

					bitPos = newBitPos;

					eedata.add(new Integer(shortt));

					size = size - 2;

				} else if (cb == 0x47) {

					newBitPos = ((Integer)getRawLong(data, bitPos).get(0)).intValue();

					int longg = ((Integer)getRawLong(data, bitPos).get(1)).intValue();

					bitPos = newBitPos;

					eedata.add(new Integer(longg));

					size = size - 4;

				} else {

					System.out.println("Unexpected code byte: " + cb);

				}

			}

			ArrayList v = new ArrayList();

			// v.add(handle, eedata);

			extData.add(v);

		}

		ArrayList v = new ArrayList();

		v.add(new Integer(bitPos));

		v.add(extData);

		return v;

	}

	/**

	 * Read a double value from a group of unsigned bytes and a default double

	 *

	 * @param data Array of unsigned bytes obtained from the DWG binary file

	 * @param offset The current bit offset where the value begins

	 * @param defVal Default double value

	 * @throws RuntimeException If an unexpected bit value is found in the DWG file. Occurs

	 *             when we are looking for LwPolylines.

	 * @return ArrayList This ArrayList has two parts. First is an int value that represents

	 * 		   the new offset, and second is the double value

	 */

	public static ArrayList getDefaultDouble(int[] data, int offset, double defVal) throws RuntimeException {

		int flags = ((Integer) getBits(data, 2, offset)).intValue();

		int read = 2;

		double val;

		if (flags == 0x0) {

			val = defVal;

		} else {

			int _offset = offset + 2;

			if (flags == 0x3) {

				byte[] bytes = (byte[]) getBits(data, 64, _offset);

				ByteBuffer bb = ByteBuffer.wrap(bytes);

				bb.order(ByteOrder.LITTLE_ENDIAN);

				val = bb.getDouble();

				read = 66;

			} else {

				byte[] dstrArrayAux = new byte[8];

				int[] doubleOffset = new int[] { 0 };

				ByteUtils.doubleToBytes(defVal, dstrArrayAux, doubleOffset);

				byte[] dstrArrayAuxx = new byte[8];

				dstrArrayAuxx[0] = dstrArrayAux[7];

				dstrArrayAuxx[1] = dstrArrayAux[6];

				dstrArrayAuxx[2] = dstrArrayAux[5];

				dstrArrayAuxx[3] = dstrArrayAux[4];

				dstrArrayAuxx[4] = dstrArrayAux[3];

				dstrArrayAuxx[5] = dstrArrayAux[2];

				dstrArrayAuxx[6] = dstrArrayAux[1];

				dstrArrayAuxx[7] = dstrArrayAux[0];

				int[] dstrArrayAuxxx = new int[8];

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

					dstrArrayAuxxx[i] = ByteUtils.getUnsigned(dstrArrayAuxx[i]);

				}

				byte[] dstrArray = new byte[8];

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

					dstrArray[i] = (byte) dstrArrayAuxxx[i];

				}

				if (flags == 0x1) {

					byte[] ddArray = (byte[]) getBits(data, 32, _offset);

					dstrArray[0] = ddArray[0];

					dstrArray[1] = ddArray[1];

					dstrArray[2] = ddArray[2];

					dstrArray[3] = ddArray[3];

					read = 34;

				} else {

					byte[] ddArray = (byte[]) getBits(data, 48, _offset);

					dstrArray[4] = ddArray[0];

					dstrArray[5] = ddArray[1];

					dstrArray[0] = ddArray[2];

					dstrArray[1] = ddArray[3];

					dstrArray[2] = ddArray[4];

					dstrArray[3] = ddArray[5];

					read = 50;

				}

				ByteBuffer bb = ByteBuffer.wrap(dstrArray);

				bb.order(ByteOrder.LITTLE_ENDIAN);

				val = bb.getDouble();

			}

		}

		ArrayList v = new ArrayList();

		v.add(new Integer(offset + read));

		v.add(new Double(val));

		return v;

	}

	/**

	 * Read a double value from a group of unsigned bytes

	 *

	 * @param data Array of unsigned bytes obtained from the DWG binary file

	 * @param offset The current bit offset where the value begins

	 * @throws RuntimeException If an unexpected bit value is found in the DWG file. Occurs

	 *             when we are looking for LwPolylines.

	 * @return ArrayList This ArrayList has two parts. First is an int value that represents

	 * 		   the new offset, and second is the double value

	 */

	public static ArrayList getBitDouble(int[] data, int offset) throws RuntimeException {

		ArrayList v = new ArrayList();

		int type = ((Integer) getBits(data, 2, offset)).intValue();

		int read = 2;

		double val = 0.0;

		if (type == 0x00) {

			byte[] bytes = (byte[]) getBits(data, 64, (offset + 2));

			ByteBuffer bb = ByteBuffer.wrap(bytes);

			bb.order(ByteOrder.LITTLE_ENDIAN);

			val = bb.getDouble();

			read = 66;

		} else if (type == 0x01) {

			val = 1.0;

		} else if (type == 0x02) {

			val = 0.0;

		} else {

			System.out.println("Bad type " + type + " at bit offset: " + offset);

		}

		v.add(new Integer(offset + read));

		v.add(new Double(val));

		return v;

	}

	/**

	 * Read a double value from a group of unsigned bytes

	 *

	 * @param data Array of unsigned bytes obtained from the DWG binary file

	 * @param offset The current bit offset where the value begins

	 * @throws RuntimeException If an unexpected bit value is found in the DWG file. Occurs

	 *             when we are looking for LwPolylines.

	 * @return ArrayList This ArrayList has two parts. First is an int value that represents

	 * 		   the new offset, and second is the double value

	 */

	public static ArrayList getRawDouble(int[] data, int offset) throws RuntimeException {

		byte[] bytes = (byte[]) getBits(data, 64, offset);

		ByteBuffer bb = ByteBuffer.wrap(bytes);

		bb.order(ByteOrder.LITTLE_ENDIAN);

		double val = bb.getDouble();

		ArrayList v = new ArrayList();

		v.add(new Integer(offset + 64));

		v.add(new Double(val));

		return v;

	}

	/**

	 * Read a short value from a group of unsigned bytes

	 *

	 * @param data Array of unsigned bytes obtained from the DWG binary file

	 * @param offset The current bit offset where the value begins

	 * @throws RuntimeException If an unexpected bit value is found in the DWG file. Occurs

	 *             when we are looking for LwPolylines.

	 * @return ArrayList This ArrayList has two parts. First is an int value that represents

	 * 		   the new offset, and second is the short value

	 */

	public static ArrayList getBitShort(int[] data, int offset) throws RuntimeException {

		ArrayList v = new ArrayList();

		int type = ((Integer) getBits(data, 2, offset)).intValue();

		int read = 2;

		int val = 0;

		if (type == 0x00) {

			byte[] bytes = (byte[]) getBits(data, 16, (offset + 2));

			ByteBuffer bb = ByteBuffer.wrap(bytes);

			bb.order(ByteOrder.LITTLE_ENDIAN);

			val = bb.getShort();

			read = 18;

		} else if (type == 0x01) {

			val = ((Integer) getBits(data, 8, (offset + 2))).intValue();

			read = 10;

		} else if (type == 0x02) {

			val = 0;

		} else if (type == 0x03) {

			val = 256;

		}

		v.add(new Integer(offset + read));

		v.add(new Integer(val));

		return v;

	}

	/**

	 * Read a short value from a group of unsigned bytes

	 *

	 * @param data Array of unsigned bytes obtained from the DWG binary file

	 * @param offset The current bit offset where the value begins

	 * @throws RuntimeException If an unexpected bit value is found in the DWG file. Occurs

	 *             when we are looking for LwPolylines.

	 * @return ArrayList This ArrayList has two parts. First is an int value that represents

	 * 		   the new offset, and second is the short value

	 */

	public static ArrayList getRawShort(int[] data, int offset) throws RuntimeException {

		byte[] bytes = (byte[]) getBits(data, 16, offset);

		ByteBuffer bb = ByteBuffer.wrap(bytes);

		bb.order(ByteOrder.LITTLE_ENDIAN);

		int val = bb.getShort();

		ArrayList v = new ArrayList();

		v.add(new Integer(offset + 16));

		v.add(new Integer(val));

		return v;

	}

	/**

	 * Read a long value from a group of unsigned bytes

	 *

	 * @param data Array of unsigned bytes obtained from the DWG binary file

	 * @param offset The current bit offset where the value begins

	 * @throws RuntimeException If an unexpected bit value is found in the DWG file. Occurs

	 *             when we are looking for LwPolylines.

	 * @return ArrayList This ArrayList has two parts. First is an int value that represents

	 * 		   the new offset, and second is the long value

	 */

	public static ArrayList getBitLong(int[] data, int offset) throws RuntimeException {

		int type = ((Integer) getBits(data, 2, offset)).intValue();

		int read = 2;

		int val = 0;

		if (type == 0x0) {

			byte[] bytes = (byte[]) getBits(data, 32, (offset + 2));

			ByteBuffer bb = ByteBuffer.wrap(bytes);

			bb.order(ByteOrder.LITTLE_ENDIAN);

			val = bb.getInt();

			read = 34;

		} else if (type == 0x01) {

			val = ((Integer) getBits(data, 8, (offset + 2))).intValue();

			read = 10;

		} else if (type == 0x02) {

			val = 0;

		} else {

			System.out.println("Bad type at bit offset: " + offset);

		}

		ArrayList v = new ArrayList();

		v.add(new Integer(offset + read));

		v.add(new Integer(val));

		return v;

	}

	/**

	 * Read a long value from a group of unsigned bytes

	 *

	 * @param data Array of unsigned bytes obtained from the DWG binary file

	 * @param offset The current bit offset where the value begins

	 * @throws RuntimeException If an unexpected bit value is found in the DWG file. Occurs

	 *             when we are looking for LwPolylines.

	 * @return ArrayList This ArrayList has two parts. First is an int value that represents

	 * 		   the new offset, and second is the long value

	 * @throws RuntimeException

	 */

	public static ArrayList getRawLong(int[] data, int offset) throws RuntimeException {

		ArrayList v = new ArrayList();

		// _val = struct.unpack('<l', _long)[0]

		byte[] bytes = (byte[]) getBits(data, 32, offset);

		ByteBuffer bb = ByteBuffer.wrap(bytes);

		bb.order(ByteOrder.LITTLE_ENDIAN);

		int val = bb.getInt();

		v.add(new Integer(offset + 32));

		v.add(new Integer(val));

		return v;

	}

	/**

	 * Read a char value from a group of unsigned bytes

	 *

	 * @param data Array of unsigned bytes obtained from the DWG binary file

	 * @param offset The current bit offset where the value begins

	 * @throws RuntimeException If an unexpected bit value is found in the DWG file. Occurs

	 *             when we are looking for LwPolylines.

	 * @return ArrayList This ArrayList has two parts. First is an int value that represents

	 * 		   the new offset, and second is the char value

	 */

	public static ArrayList getRawChar(int[] data, int offset) throws RuntimeException {

		int charr = ((Integer) getBits(data, 8, offset)).intValue();

		ArrayList v = new ArrayList();

		v.add(new Integer(offset + 8));

		v.add(new Integer(charr));

		return v;

	}

	/**

	 * Read a char value from a group of unsigned bytes

	 *

	 * @param data Array of unsigned bytes obtained from the DWG binary file

	 * @param offset The current bit offset where the value begins

	 * @throws RuntimeException If an unexpected bit value is found in the DWG file. Occurs

	 *             when we are looking for LwPolylines.

	 * @return ArrayList This ArrayList has two parts. First is an int value that represents

	 * 		   the new offset, and second is the char value

	 */

	public static ArrayList getModularChar(int[] data, int offset) throws RuntimeException {

		int val = 0;

		ArrayList bytes = new ArrayList();

		boolean read = true;

		int offsett = offset;

		int fac = 1;

		while (read) {

			int bytee = ((Integer) getBits(data, 8, offsett)).intValue();

			offsett = offsett + 8;

			if ((bytee & 0x80) == 0) {

				read = false;

				if ((bytee & 0x40) > 0) {

					fac = -1;

					bytee = bytee & 0xbf;

				}

			}

			bytes.add(new Integer(bytee & 0x7f));

		}

		if (bytes.size()==1) val = ((Integer)bytes.get(0)).intValue();

		else if (bytes.size()==2) val = ((Integer)bytes.get(0)).intValue() | (((Integer)bytes.get(1)).intValue() << 7);

		else if (bytes.size()==3) val = ((Integer)bytes.get(0)).intValue() | (((Integer)bytes.get(1)).intValue() << 7) | (((Integer)bytes.get(2)).intValue() << 14);

		else if (bytes.size()==4) val = ((Integer)bytes.get(0)).intValue() | (((Integer)bytes.get(1)).intValue() << 7) | (((Integer)bytes.get(2)).intValue() << 14) | (((Integer)bytes.get(3)).intValue() << 21);

		else System.out.println("Unexpected byte array length: " + bytes.size());

		ArrayList v = new ArrayList();

		v.add(new Integer(offsett));

		v.add(new Integer(fac * val));

		return v;

	}

	/**

	 * Read a String from a group of unsigned bytes

	 *

	 * @param data Array of unsigned bytes obtained from the DWG binary file

	 * @param offset The current bit offset where the value begins

	 * @throws RuntimeException If an unexpected bit value is found in the DWG file. Occurs

	 *             when we are looking for LwPolylines.

	 * @return ArrayList This ArrayList has two parts. First is an int value that represents

	 * 		   the new offset, and second is the String

	 */

	public static ArrayList getTextString(int[] data, int offset) throws RuntimeException {

		int bitPos = offset;

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

		int newBitPos = ((Integer) bitShort.get(0)).intValue();

		int len = ((Integer) bitShort.get(1)).intValue();

		bitPos = newBitPos;

		int bitLen = len * 8;

		Object cosa = DwgUtil.getBits(data, bitLen, bitPos);

		String string;

		if (cosa instanceof byte[]) {

			string = new String((byte[]) cosa);

		} else {

			// string = ((Integer)cosa).toString();

			byte[] bytes = new byte[] { ((Integer) cosa).byteValue() };

			string = new String((byte[]) bytes);

		}

		bitPos = bitPos + bitLen;

		ArrayList v = new ArrayList();

		v.add(new Integer(bitPos));

		v.add(string);

		return v;

	}

	/**

	 * Read a CmColor from a group of unsigned bytes

	 *

	 * @param data

	 *            Array of unsigned bytes obtained from the DWG binary file

	 * @param offset

	 *            The current bit offset where the value begins

	 * @throws RuntimeException

	 *             If an unexpected bit value is found in the DWG file. Occurs

	 *             when we are looking for LwPolylines.

	 * @return ArrayList This ArrayList has two parts. First is an int value

	 *         that represents the new offset, and second is the int value

	 *         (handle of a DWG object)

	 */

	public static ArrayList getCmColor(int[] intData, int offset, String version) throws RuntimeException {

		ArrayList v = new ArrayList();

		int bitPos = offset;

		List val = getBitShort(intData, bitPos);

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

		v.add((Integer) val.get(1));		//color index

		//FIXME: para versiones superiores habrá que ampliar la condición

		if (version.equalsIgnoreCase("Autocad R2004, R2005, R2006")){

			val = getBitLong(intData, bitPos);

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

			v.add((Integer) val.get(1));	//RGB value

			val = getRawChar(intData, bitPos);

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

			Integer colorByte = ((Integer) val.get(1)); //.intValue();

			v.add(colorByte);				//Color Byte

			// Según la documentacion:

			// Color Byte & 1 ==> color name follows

			// Color Byte & 2 ==> book name follows

			if (((colorByte.intValue() & 0x01) != 0) || ((colorByte.intValue() & 0x02) != 0)) {

				val = getTextString(intData, bitPos);

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

				v.add(val.get(1));//color name or book name

			} else {

				v.add("");//color name or book name

			}

		}

		v.add(0, new Integer(bitPos));

		return v;

	}

	/**

	 * Read a int value (the handle of a DWG object) from a group of unsigned

	 * bytes

	 *

	 * @param data

	 *            Array of unsigned bytes obtained from the DWG binary file

	 * @param offset

	 *            The current bit offset where the value begins

	 * @throws RuntimeException

	 *             If an unexpected bit value is found in the DWG file. Occurs

	 *             when we are looking for LwPolylines.

	 * @return ArrayList This ArrayList has two parts. First is an int value

	 *         that represents the new offset, and second is the int value

	 *         (handle of a DWG object)

	 */

	public static ArrayList getHandle(int[] data, int offset)

			throws RuntimeException {

		ArrayList v = new ArrayList();

		int code = ((Integer) DwgUtil.getBits(data, 4, offset)).intValue();

	    int counter = ((Integer)DwgUtil.getBits(data, 4, (offset + 4))).intValue();

		int read = 8;

		ArrayList hlist = new ArrayList();

		if (counter > 0) {

			int hlen = counter * 8;

			Object handle = DwgUtil.getBits(data, hlen, (offset + 8));

			read = read + hlen;

			if (hlen > 8) {

				byte[] handleBytes = (byte[]) handle;

				int[] handleInts = new int[handleBytes.length];

				// Hacerlos unsigned ...

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

					handleInts[i] = ByteUtils.getUnsigned(handleBytes[i]);

				}

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

					hlist.add(new Integer(handleInts[i]));

				}

			} else {

				hlist.add(handle);

			}

		}

		v.add(new Integer(offset + read));

		v.add(new Integer(code));

		v.add(new Integer(counter));

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

			v.add(hlist.get(i));

		}

		return v;

	}

	/**

	 * Read a int value (the size of a modular short) from a ByteBuffer

	 *

	 * @param bb Data given as a ByteBuffer

	 * @return int Size of the modular short

	 */

	public static int getModularShort(ByteBuffer bb) {

		ArrayList shorts = new ArrayList();

		bb.order(ByteOrder.BIG_ENDIAN);

		short shortt = bb.getShort();

		int size = 0;

		while ((shortt & 0x80) > 0) {

			shorts.add(new Short(shortt));

			shortt = bb.getShort();

		}

		shorts.add(new Short(shortt));

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

			shortt = ((Short) shorts.get(i)).shortValue();

			shorts.set(i, new Integer(((shortt & 0xff00) >> 8) | ((shortt & 0xff) << 8)));

		}

		int slen = shorts.size();

		if (slen == 1) {

			size = (((Integer)shorts.get(0)).intValue()) & 0x7fff;//(new Integer(((Integer)shorts.get(0)).shortValue() & 0x7fff)).byteValue();

		} else if (slen == 2) {

			int tmp = ((Integer) shorts.get(0)).intValue();

			shorts.set(0, shorts.get(1));

			shorts.set(1, new Integer(tmp));

			size = (((((Integer)shorts.get(0)).intValue()) & 0x7fff) << 15) | (((((Integer)shorts.get(1)).intValue()) & 0x7fff));//(new Integer(((Integer)shorts.get(0)).shortValue() & 0x7fff)).byteValue();

		} else {

			System.out.println("Unexpected array length: " + slen);

		}

		return size;

	}

	/**

	 * Returns a set of bits from a group of unsigned bytes

	 *

	 * @param data Array of unsigned bytes obtained from the DWG binary file

	 * @param count Bit counter

	 * @param offset The current bit offset where the value begins

	 * @throws RuntimeException If an unexpected bit value is found in the DWG file. Occurs

	 *             when we are looking for LwPolylines.

	 * @return This method returns an array of bytes or an int value

	 */

	public static Object getBits(int[] data, int count, int offset) throws RuntimeException {

		int idx = offset / 8;

		int bitidx = offset % 8;

		/**

		 * mask1: bit mask to apply to the current byte

		 * lshift: left shift amount of mask results

		 * mask2: bit mask to apply to the next byte

		 * rshift: right shift amount of the mask results

		 */

		int[][] maskTable = new int[][]{

		    {0xff, 0, 0x00, 0}, // bit offset == 0

				{ 0x7f, 1, 0x80, 7 }, // bit offset == 1

				{ 0x3f, 2, 0xc0, 6 }, // bit offset == 2

				{ 0x1f, 3, 0xe0, 5 }, // bit offset == 3

				{ 0x0f, 4, 0xf0, 4 }, // bit offset == 4

				{ 0x07, 5, 0xf8, 3 }, // bit offset == 5

				{ 0x03, 6, 0xfc, 2 }, // bit offset == 6

				{ 0x01, 7, 0xfe, 1 }, // bit offset == 7

		};

		int mask1 = maskTable[bitidx][0];

		int lsh = maskTable[bitidx][1];

		int mask2 = maskTable[bitidx][2];

		int rsh = maskTable[bitidx][3];

		int binc = 8 - bitidx;

		int read = 0;

		int rem = count;

		int bytee = 0x0;

		ArrayList bytes = new ArrayList();

		while (read < count) {

			int b1 = 0;

			if (rem > binc) {

				b1 = (data[idx] & mask1);

				read = read + binc;

				rem = rem - binc;

			} else {

				b1 = ((data[idx] & mask1) >> (8 - bitidx - rem));

				bytee = b1;

				read = read + rem;

				rem = 0;

			}

			if (read < count) {

				idx = idx + 1;

				if (rem > bitidx) {

					int b2 = (data[idx] & mask2);

					bytee = (b1 << lsh) | (b2 >> rsh);

					read = read + bitidx;

					rem = rem - bitidx;

				} else {

					int mask = maskTable[rem][2];

					int b2 = data[idx] & mask;

					bytee = (b1 << rem) | (b2 >> (8 - rem));

					read = read + rem;

					rem = 0;

				}

			}

			if (count > 8) {

				bytes.add(new Integer(bytee));

			}

		}

		if (bytes.size() > 0) {

			byte[] newBytes = new byte[bytes.size()];

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

				newBytes[i] = ((Integer) bytes.get(i)).byteValue();

			}

			return newBytes;

		}

		return new Integer(bytee);

	}

	/**

	 * Test a bit obtained from a set of unsigned bytes

	 *

	 * @param data Array of unsigned bytes obtained from the DWG binary file

	 * @param offset The current bit offset where the value begins

	 * @return ArrayList This ArrayList has two parts. First is an int value that represents

	 * 		   the new offset, and second is a bit flag

	 */

	public static ArrayList testBit(int[] data, int offset) {

		int idx = offset / 8;

		int bitidx = offset % 8;

		int mask = 0x1 << (7 - bitidx);

		boolean val = false;

		if ((data[idx] & mask) > 0) val = true;

		ArrayList v = new ArrayList();

		v.add(new Integer(offset + 1));

		v.add(new Boolean(val));

		return v;

	}

	/**

	 * Convert bytes to machine value bytes

	 *

	 * @param data Input of array of bytes

	 * @return int[] Output of array of machine bytes

	 */

	public static int[] bytesToMachineBytes(byte[] data) {

		String[] dataString = new String[data.length];

		int[] dataOut = new int[data.length];

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

			dataString[i] = HexUtil.bytesToHex(new byte[] { data[i] });

			Integer dataInt = Integer.decode("0x" + dataString[i]);

			dataOut[i] = dataInt.intValue();

		}

		return dataOut;

	}

	/**

	 * It receives the list procedent from getHandle method, and return the

	 * handle as int

	 *

     * */

	public static int handleToInt(List fromGetHandle) {

		int[] handle = new int[fromGetHandle.size() - 1];

		for (int j = 1; j < fromGetHandle.size(); j++) {

			handle[j - 1] = ((Integer) fromGetHandle.get(j)).intValue();

		}

		ArrayList handleVect = new ArrayList();

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

			handleVect.add(new Integer(handle[i]));

		}

		return DwgUtil.handleBinToHandleInt(handleVect);