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/* 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 com.iver.cit.jdwglib.dwg;

import java.awt.geom.Point2D;

import java.io.File;

import java.io.FileInputStream;

import java.io.IOException;

import java.nio.ByteBuffer;

import java.nio.channels.FileChannel;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.Iterator;

import java.util.List;

import java.util.Map;

import java.util.Vector;

import org.apache.log4j.Logger;

import com.iver.cit.jdwglib.dwg.objects.DwgBlockHeader;

import com.iver.cit.jdwglib.dwg.objects.DwgInsert;

import com.iver.cit.jdwglib.dwg.objects.DwgLayer;

import com.iver.cit.jdwglib.dwg.readers.DwgFileV12Reader;

import com.iver.cit.jdwglib.dwg.readers.DwgFileV14Reader;

import com.iver.cit.jdwglib.dwg.readers.DwgFileV15Reader;

import com.iver.cit.jdwglib.dwg.readers.IDwgFileReader;

/**

 * The DwgFile class provides a revision-neutral interface for reading and handling

 * DWG files

 * Reading methods are useful for reading DWG files, and handling methods like

 * calculateDwgPolylines() are useful for handling more complex

 * objects in the DWG file

 *

 * @author jmorell

 * @author azabala

 */

public class DwgFile {

        public static final String DWG_ACAD2000 = "AC1015";

        public static final String DWG_ACAD14 = "AC1014";

        public static final String DWG_ACAD_PRE_14 = "AC1013";

        public static final String DWG_ACAD13 = "AC1012";

        public static final String DWG_ACAD12 = "AC1009";

        /**

         * It has all known DWG version's header.

         * Extracted from Autodesk web.

         */

        private static HashMap acadVersions = new HashMap();

        static{

                acadVersions.put("AC1004", "Autocad R9");

                acadVersions.put("AC1006", "Autocad R10");

                acadVersions.put("AC1007", "Autocad pre-R11");

                acadVersions.put("AC1007", "Autocad pre-R11");

                acadVersions.put("AC1008", "Autocad pre-R11b");

                acadVersions.put(DWG_ACAD12, "Autocad R12");

                acadVersions.put("AC1010", "Autocad pre-R13 a");

                acadVersions.put("AC1011", "Autocad pre-R13 b");

                acadVersions.put(DWG_ACAD13, "Autocad R13");

                acadVersions.put(DWG_ACAD_PRE_14, "Autocad pre-R14");

                acadVersions.put(DWG_ACAD14, "Autocad R14");

                acadVersions.put("AC1500", "Autocad pre-2000");

                acadVersions.put(DWG_ACAD2000, "Autocad R2000, R2000i, R2002");

                acadVersions.put("AC402a", "Autocad pre-2004a");

                acadVersions.put("AC402b", "Autocad pre-2004b");

                acadVersions.put("AC1018", "Autocad R2004, R2005, R2006");

                acadVersions.put("AC1021", "Autocad R2007");

        }

        /**

         * Registry of file readers

         * */

        private static HashMap acadReaders = new HashMap();

        static{

                acadReaders.put(DWG_ACAD2000,DwgFileV15Reader.class);

                acadReaders.put(DWG_ACAD_PRE_14,DwgFileV14Reader.class);

                acadReaders.put(DWG_ACAD14,DwgFileV14Reader.class);

                acadReaders.put(DWG_ACAD13,DwgFileV14Reader.class);

                acadReaders.put(DWG_ACAD12,DwgFileV12Reader.class);

        }

        public static Class getReaderForVersion(String dwgVersion){

                return (Class) acadReaders.get(dwgVersion);

        }

        public static void registerDwgReader(String version, Class dwgReaderClazz){

                if( IDwgFileReader.class.isAssignableFrom(dwgReaderClazz)){

                        if(!acadReaders.containsKey(version)){

                                acadReaders.put(version, dwgReaderClazz);

                        }else{

                                logger.warn("Ya hay un reader registrado para la version "+version);

                        }

                }else{

                        logger.warn("La clase "+dwgReaderClazz.getName()+" no es una implementacion valida de IDwgFileReader");

                }

        }

        /**

         * Returns an iterator over all the string that represents

         * dwg version for we have a registered reader

         * */

        public static Iterator getRegisteredVersions(){

                return acadReaders.keySet().iterator();

        }

        private static Logger logger = Logger.getLogger(DwgFile.class

                        .getName());

        /**

         * Path and name of the dwg file

         * */

        private String fileName;

        /**

         * DWG version of the file (AC1013, AC1018, etc.)

         * */

        private String dwgVersion;

        /**

         * Offsets to the DWG sections

         */

        private ArrayList dwgSectionOffsets;

        /**

         * Header vars readed from the HEADER section of the DWG file

         * */

        private Map headerVars;

        /**

         * This list contains what in OpenDWG specification is called

         * the object map ( a collection of entries where each entry contains

         * the seek of each object, and its size)

         * */

        private ArrayList dwgObjectOffsets;

        /**

         * For each entry in dwgObjectOffsets, we have an instance of

         * DwgObject in the dwgObjects collection

         *

         * */

        private List dwgObjects;

        private HashMap handle_objects;

        private ArrayList dwgClasses;

        /**

         * hash map that indexes all DwgLayer objects

         * by its handle property

         * */

        private HashMap layerTable;

        /**

         * Specific reader of the DWG file version (12, 13, 14, 2000, etc., each

         * version will have an specific reader)

         * */

        private IDwgFileReader dwgReader;

        private boolean dwg3DFile;

        /**

         * Memory mapped byte buffer of the whole DWG file

         * */

        private ByteBuffer bb;

        /*

         * Optimizaciones para evitar leer el fichero completo en cada

         * pasada.

         * */

        /**

         * Contains all IDwgPolyline implementations

         * */

        private List dwgPolylines;

        /**

         * Contains all INSERT entities of the dwg file

         * (these entities must be processed in a second pass)

         *

         * */

        private List insertList;

        private List blockList;

        /**

         * Constructor.

         * @param fileName an absolute path to the DWG file

         */

        public DwgFile(String fileName) {

                this.fileName = fileName;

                dwgSectionOffsets = new ArrayList();

                dwgObjectOffsets = new ArrayList();

                headerVars = new HashMap();

                dwgClasses = new ArrayList();

                dwgObjects = new ArrayList();

                handle_objects = new HashMap();

                layerTable = new HashMap();

                dwgPolylines = new ArrayList();

                insertList = new ArrayList();

                blockList = new ArrayList();

        }

        public String getDwgVersion() {

                return dwgVersion;

        }

        /**

         * Reads a DWG file and put its objects in the dwgObjects Vector

         * This method is version independent

         *

         * @throws IOException If the file location is wrong

         */

        public void read() throws IOException,

                                DwgVersionNotSupportedException

        {

                setDwgVersion();

                //main readers (not configurable)

                if (dwgVersion.equalsIgnoreCase("Autocad R2000, R2000i, R2002")) {

                        dwgReader = new DwgFileV15Reader();

                }else if (dwgVersion.equalsIgnoreCase("Autocad pre-R14")||

                                dwgVersion.equalsIgnoreCase("Autocad R14") ||

                                dwgVersion.equalsIgnoreCase("Autocad R13")) {

                        dwgReader = new DwgFileV14Reader();

                } else if (dwgVersion.equalsIgnoreCase("Autocad R12")||

                                dwgVersion.equalsIgnoreCase("Autocad pre-R13 a") ||

                                dwgVersion.equalsIgnoreCase("Autocad pre-R13 b")) {

                        boolean isR13 = true;

                        if(dwgVersion.equalsIgnoreCase("Autocad R12"))

                                        isR13 = false;

                        dwgReader = new DwgFileV12Reader(isR13);

                }else {

                        //look for registered readers

                        Class iReader = getReaderForVersion(dwgVersion);

                        if(iReader == null){

                                DwgVersionNotSupportedException exception =

                                        new DwgVersionNotSupportedException("Version de DWG no soportada");

                                exception.setDwgVersion(dwgVersion);

                                throw exception;

                        } else

                                try {

                                        dwgReader = (IDwgFileReader) iReader.newInstance();

                                } catch (Exception e) {

                                        DwgVersionNotSupportedException exception =

                                                new DwgVersionNotSupportedException("Version de DWG no soportada");

                                        exception.setDwgVersion(dwgVersion);

                                        throw exception;

                                }

                }

                try{

                        dwgReader.read(this, bb);

                }catch(Throwable t){

                        t.printStackTrace();

                        throw new IOException("Error leyendo dwg");

                }

        }

        private void setDwgVersion() throws IOException {

                File file = new File(fileName);

                FileInputStream fileInputStream = new FileInputStream(file);

                FileChannel fileChannel = fileInputStream.getChannel();

                long channelSize = fileChannel.size();

                bb = fileChannel.map(FileChannel.MapMode.READ_ONLY, 0, channelSize);

                byte[] versionBytes = {bb.get(0),

                                                                bb.get(1),

                                                                bb.get(2),

                                                                bb.get(3),

                                                                bb.get(4),

                                                                bb.get(5)};

                ByteBuffer versionByteBuffer = ByteBuffer.wrap(versionBytes);

                String[] bs = new String[versionByteBuffer.capacity()];

                String versionString = "";

                for (int i=0; i<versionByteBuffer.capacity(); i++) {

                        bs[i] = new String(new byte[]{(byte)(versionByteBuffer.get(i))});

                        versionString = versionString + bs[i];

                }

                String version = (String) acadVersions.get(versionString);

                if(version == null)

                        version = "Unknown Dwg format";

                this.dwgVersion = version;

        }

        public void setHeader(String key, Object value){

                headerVars.put(key, value);

        }

        public Object getHeader(String key){

                return headerVars.get(key);

        }

        /*

         * A DwgLayer is a DWG drawing entity, so all DwgLayer objects are

         * saved in dwgObjects collection.

         * Instead of iterate over the full collection, is faster check every object

         * and save all the DwgLayer instances in their own collection.

         *

         */

        protected void addDwgLayer(DwgLayer dwgLayer){

                layerTable.put(new Integer(dwgLayer.getHandle().getOffset()),

                                dwgLayer);

        }

        private void printInfoOfAObject (DwgObject entity){

                logger.info("index = "+entity.getIndex() + " entity.type = " + entity.type + " entityClassName = "+ entity.getClass().getName());

                logger.info("handleCode = "+entity.getHandle().getCode());

                logger.info("entityLayerHandle = "+entity.getHandle().getOffset());

                if(entity.hasLayerHandle()){

                        logger.info("layerHandleCode = "+entity.getLayerHandle().getCode());

                        logger.info("layerHandle = "+entity.getLayerHandle().getOffset());

                }

                if(entity.hasSubEntityHandle()){

                        logger.info("subEntityHandleCode = "+entity.getSubEntityHandle().getCode());

                        logger.info("subEntityHandle = "+entity.getSubEntityHandle().getOffset());

                }

                if(entity.hasNextHandle()){

                        logger.info("nextHandleCode = "+entity.getNextHandle().getCode());

                        logger.info("nextHandle = "+entity.getNextHandle().getOffset());

                }

                if(entity.hasPreviousHandle()){

                        logger.info ("previousHandleCode = "+entity.getPreviousHandle().getCode());

                        logger.info ("previousHandle = "+entity.getPreviousHandle().getOffset());

                }

                if(entity.hasXDicObjHandle()){

                        logger.info ("xDicObjHandleCode = "+entity.getXDicObjHandle());

                        logger.info ("xDicObjHandle = "+entity.getXDicObjHandle());

                }

                if(entity.hasReactorsHandles()){

                        ArrayList reactorsHandles = entity.getReactorsHandles();

                        int size = reactorsHandles.size();

                        logger.info ("NUMERO DE reactors = "+size);

                        DwgHandleReference hr;

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

                                hr=(DwgHandleReference)reactorsHandles.get(i);

                                logger.info ("reactorHandleCode = "+hr.getCode());

                                logger.info (" reactorHandle = "+hr.getOffset());

                        }

                }

        }

        public DwgLayer getDwgLayer(DwgObject entity){

                DwgHandleReference handle = entity.getLayerHandle();

                if(handle == null){

                        return null;

                }

                int        handleCode = handle.getCode();

                int        entityLayerHandle = entity.getLayerHandle().getOffset();

                int layerHandle = -1;

                int entityRecord;

                DwgObject object;

                /*

                 * OpenDWG spec, v3, page 11. HANDLE REFERENCES

                 *

                 * A handle is formed by this fields:

                 * a) CODE (4 bits)

                 * b) COUNTER (4 bits)

                 * c) OFFSET of the object (handle itself).

                 *

                 * CODE could take these values:

                 * 1) 0x2, 0x3, 0x4, 0x5 -> offset is the handle of the layer

                 * 2) 0x6 -> offset is the next object handle

                 * 3) 0x8 -> offset is the previous object handle

                 * 4) 0xA -> result is reference handle plus offset

                  * 5) 0xC -> result is reference handle minus offset

                 *

                 * */

                // FIXME: Esto no esta terminado. Falta considerar los codigo

                // 0x2, 0x3, 0x6, 0xA que no han aparecido en los archivos de prueba.

                switch(handleCode){

                case 0x4:

                        if (entity.hasNextHandle()){

                                int nextHandleCode = entity.getNextHandle().getCode();

                                if (nextHandleCode == 0x5) {

                                        layerHandle = entity.getNextHandle().getOffset();

                                } else {

                                        //TODO: No se han previsto nextHandleCode != 0x5

//                                        System.out.println ("DwgFile.getDwgLayer: handleCode "+handleCode+

//                                                        " con nextHandleCode "+ nextHandleCode +" no implementado.");

                                }

                        } else {

                                layerHandle = entity.getLayerHandle().getOffset();

                        }

                        break;

                case 0x5:

                        layerHandle = entity.getLayerHandle().getOffset();

                        break;

                case 0x8:

                        if (entity.hasNextHandle()){

                                int nextHandleCode = entity.getNextHandle().getCode();

                                if (nextHandleCode == 0x5) {

                                        layerHandle = entity.getNextHandle().getOffset();

                                } else {

                                        //TODO No se han previsto nextHandleCode != 0x5

//                                        System.out.println ("DwgFile.getDwgLayer: handleCode "+handleCode+

//                                                        " con nextHandleCode "+ nextHandleCode +" no implementado.");

                                }

                        } else {

                                layerHandle = entity.getHandle().getOffset() - 1;

                        }

                        break;

                case 0xC:

                        if (entity.hasNextHandle()){

                                int nextHandleCode = entity.getNextHandle().getCode();

                                if (nextHandleCode == 0x5) {

                                        layerHandle = entity.getNextHandle().getOffset();

                                } else {

                                        //TODO: No se han previsto nextHandleCode != 0x5

//                                        System.out.println ("DwgFile.getDwgLayer: handleCode "+handleCode+

//                                                        " con nextHandleCode "+ nextHandleCode +" no implementado.");

                                }

                        } else {

                                layerHandle = entity.getHandle().getOffset() - entity.getLayerHandle().getOffset() + 1;

                        }

                        break;

                default:

//                        System.out.println ("DwgFile.getDwgLayer: handleCode "+handleCode+" no implementado. entityLayerHandle="+entityLayerHandle);

                }

                if(layerHandle != -1){

                        Iterator lyrIterator = layerTable.values().iterator();

                        while(lyrIterator.hasNext()){

                                DwgLayer lyr = (DwgLayer) lyrIterator.next();

                                int lyrHdl = lyr.getHandle().getOffset();

                                if (lyrHdl == layerHandle){

                                        return lyr;

                                }

                        }

                }

//                System.out.println("NO SE HA ENCONTRADO UNA CAPA CON HANDLE " + layerHandle);

//                printInfoOfAObject(entity);

                return null;

        }

        public DwgObject getDwgSuperEntity(DwgObject entity) {

                if(entity.hasSubEntityHandle()){

                        int handleCode = entity.subEntityHandle.getCode();

                        int offset = entity.subEntityHandle.getOffset();

                        int handle = -1;

                        DwgObject object;

                        switch(handleCode){

                        // TODO: case 0x2:

                        // TODO: case 0x3:

                        case 0x4:

                        case 0x5:

                                handle = offset;

                                break;

                        // TODO: case 0x6:

                        case 0x8:

                                handle=entity.getHandle().getOffset() - 1;

                                break;

                        case 0xA:

                                handle = entity.getHandle().getOffset() + offset;

                                break;

                        case 0xC:

                                handle = entity.getHandle().getOffset() - offset;

                                break;

                        default:

                                logger.warn ("DwgObject.getDwgSuperEntity: handleCode "+handleCode+" no implementado. offset = "+offset);

                        }

                        if(handle != -1){

                                object = getDwgObjectFromHandle(handle);

                                if(object != null)

                                        return object;

                        }

                }

                return null;

        }

        public String getLayerName(DwgObject entity) {

                DwgLayer dwgLayer = getDwgLayer(entity);

                if(dwgLayer == null){

                        return "";

                }else{

                        return dwgLayer.getName();

                }

        }

        /**

     * Returns the color of the layer of a DWG object

         *

     * @param entity DWG object which we want to know its layer color

         * @return int Layer color of the DWG object in the Autocad color code

         */

        public int getColorByLayer(DwgObject entity) {

                int colorByLayer;

                DwgLayer dwgLyr = getDwgLayer(entity);

                if(dwgLyr == null)

                        colorByLayer = 0;

                else

                        colorByLayer = dwgLyr.getColor();

                return colorByLayer;

        }

        /**

         * Configure the geometry of the polylines in a DWG file from the vertex list in

         * this DWG file. This geometry is given by an array of Points.

         * Besides, manage closed polylines and polylines with bulges in a GIS Data model.

     * It means that the arcs of the polylines will be done through a set of points and

     * a distance between these points.

         */

        public void calculateGisModelDwgPolylines() {

                /*

                 * In Dwg 12 format, all vertices of a polyline are between polyline entity

                 * and endsec entity. Also, polylines dont save any handle of their vertices (first and last).

                 *

                 * After Dwg 12 version, we have the opposite case: polylines have handles/pointers to their

                 * first and last vertices.

                 *

                 * If dwg file is not V12, we must look for all polyline vertices (and we must to wait until

                 * all entities are readed).

                 * If dwg file is V12, all polylines already have their vertices.

                 * */

                if(! (dwgReader instanceof DwgFileV12Reader)){

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

                                DwgObject pol = (DwgObject)dwgPolylines.get(i);

                                if (pol instanceof IDwgPolyline) {

                                        ((IDwgPolyline)pol).calculateGisModel(this);

                                }//if

                        }//for

                }

        }

    /**

     * Configure the geometry of the polylines in a DWG file from the vertex list in

     * this DWG file. This geometry is given by an array of Points

     * Besides, manage closed polylines and polylines with bulges in a GIS Data model.

     * It means that the arcs of the polylines will be done through a curvature

     * parameter called bulge associated with the points of the polyline.

     */

        //TODO Refactorizar para que solo se aplique a las Polilineas

//        public void calculateCadModelDwgPolylines() {

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

//                        DwgObject pol = (DwgObject)dwgObjects.get(i);

//                        if (pol instanceof DwgPolyline2D) {

//                                int flags = ((DwgPolyline2D)pol).getFlags();

//                                int firstHandle = ((DwgPolyline2D)pol).getFirstVertexHandle().getOffset();

//                                int lastHandle = ((DwgPolyline2D)pol).getLastVertexHandle().getOffset();

//                                ArrayList pts = new ArrayList();

//                                ArrayList bulges = new ArrayList();

//                                double[] pt = new double[3];

//                                for (int j=0;j<dwgObjects.size();j++) {

//                                        DwgObject firstVertex = (DwgObject)dwgObjects.get(j);

//                                        if (firstVertex instanceof DwgVertex2D) {

//                                                int vertexHandle = firstVertex.getHandle().getOffset();

//                                                if (vertexHandle==firstHandle) {

//                                                        int k=0;

//                                                        while (true) {

//                                                                DwgObject vertex = (DwgObject)dwgObjects.get(j+k);

//                                                                int vHandle = vertex.getHandle().getOffset();

//                                                                if (vertex instanceof DwgVertex2D) {

//                                                                        pt = ((DwgVertex2D)vertex).getPoint();

//                                                                        pts.add(new Point2D.Double(pt[0], pt[1]));

//                                                                        double bulge = ((DwgVertex2D)vertex).getBulge();

//                                                                        bulges.add(new Double(bulge));

//                                                                        k++;

//                                                                        if (vHandle==lastHandle && vertex instanceof DwgVertex2D) {

//                                                                                break;

//                                                                        }

//                                                                } else if (vertex instanceof DwgSeqend) {

//                                                                        break;

//                                                                }

//                                                        }

//                                                }

//                                        }

//                                }

//                                if (pts.size()>0) {

//                                        /*Point2D[] newPts = new Point2D[pts.size()];

//                                        if ((flags & 0x1)==0x1) {

//                                                newPts = new Point2D[pts.size()+1];

//                                                for (int j=0;j<pts.size();j++) {

//                                                        newPts[j] = (Point2D)pts.get(j);

//                                                }

//                                                newPts[pts.size()] = (Point2D)pts.get(0);

//                                                bulges.add(new Double(0));

//                                        } else {

//                                                for (int j=0;j<pts.size();j++) {

//                                                        newPts[j] = (Point2D)pts.get(j);

//                                                }

//                                        }*/

//                                        double[] bs = new double[bulges.size()];

//                                        for (int j=0;j<bulges.size();j++) {

//                                                bs[j] = ((Double)bulges.get(j)).doubleValue();

//                                        }

//                                        ((DwgPolyline2D)pol).setBulges(bs);

//                                        //Point2D[] points = GisModelCurveCalculator.calculateGisModelBulge(newPts, bs);

//                                        Point2D[] points = new Point2D[pts.size()];

//                                        for (int j=0;j<pts.size();j++) {

//                                            points[j] = (Point2D)pts.get(j);

//                                        }

//                                        ((DwgPolyline2D)pol).setPts(points);

//                                } else {

////                                        System.out.println("Encontrada polil?nea sin puntos ...");

//                                        // TODO: No se debe mandar nunca una polil?nea sin puntos, si esto

//                                        // ocurre es porque existe un error que hay que corregir ...

//                                }

//                        } else if (pol instanceof DwgPolyline3D) {

//                        } else if (pol instanceof DwgLwPolyline && ((DwgLwPolyline)pol).getVertices()!=null) {

//                        }

//                }

//        }

        /*

         * TODO Revisar los bloques que son XREF

         * */

        public void blockManagement2(){

                Iterator it = null;

                //dwg v12 blocks already has their entities added

                //for the rest of versions, we add block entities to their owner block

                if(! (dwgReader instanceof DwgFileV12Reader)){

                        //once we have read all dwg entities, we look for all of them

                        //that has a superentity that is a block (to fill in the entity list

                        //of each block

                        it = dwgObjects.iterator();

                        int i = 0;

                        while(it.hasNext()){

                                DwgObject entity = (DwgObject)it.next();

                                DwgObject superEnt = getDwgSuperEntity(entity);

                                if(superEnt instanceof DwgBlockHeader){

                                        DwgBlockHeader blk = (DwgBlockHeader)superEnt;

                                        blk.addObject(entity);

                                        it.remove();//TODO Creo que esto es lento, mejor

                                        //el metodo original (en java solo se duplican las referencias)

                                        i++;

                                        if(blk.isBlkIsXRef()){

                                                 System.out.println("bloque "+blk.getName()+" es referencia externa");

                                                 System.out.println("path="+blk.getXRefPName());

                                                 String path = blk.getXRefPName();

                                                 DwgFile externalRef = new DwgFile(path);

                                                 try {

                                                        externalRef.read();

                                                        externalRef.calculateGisModelDwgPolylines();

                                                        externalRef.blockManagement2();

                                                        List dwgObjects = externalRef.getDwgObjects();

                                                        blk.getObjects().addAll(dwgObjects);

                                                } catch (IOException e) {

                                                        // TODO Auto-generated catch block

                                                        e.printStackTrace();

                                                        continue;

                                                } catch (DwgVersionNotSupportedException e) {

                                                        // TODO Auto-generated catch block

                                                        e.printStackTrace();

                                                        continue;

                                                }

                                         }

                                }

                        }//while

                }//if dwgfilev12

                //after that, we process the INSERTs

                it = insertList.iterator();

                while(it.hasNext()){

                        DwgInsert insert = (DwgInsert) it.next();

                        if(insert.isProcessed()){

                                //It has been processed nexted to other insert

                                continue;

                        }

                        insert.setProcessed(true);

                        double[] p = insert.getInsertionPoint();

                        Point2D point = new Point2D.Double(p[0], p[1]);

                        double[] scale = insert.getScale();

                        double rot = insert.getRotation();

                        int blockHandle = insert.getBlockHeaderHandle().getOffset();

                        manageInsert2(point, scale,

                                        rot, blockHandle,

                                        dwgObjects, handle_objects);

                }

}

        public void manageInsert2(Point2D insPoint, double[] scale,

                        double rot, int bHandle,

                        List dwgObjectsWithoutBlocks,

                        Map handleObjectsWithoutBlocks) {

                DwgObject object = (DwgObject) handle_objects.get(new Integer(bHandle));

                if(object == null){

                        logger.error("No hemos encontrado el BlockHeader cuyo handle es "+bHandle);

                        return;

                }else if(! (object instanceof DwgBlockHeader)){

                        //Hay un problema con la asignaci?n de handle

                        //Un INSERT tiene como handle de Block una entidad que no es block

                        logger.error("handle incorrecto." + object.getClass().getName() + " no es un blockheader");

                        return;

                }

                DwgBlockHeader blockHeader = (DwgBlockHeader)object;

                double[] bPoint = blockHeader.getBasePoint();

                String bname = blockHeader.getName();

                if (bname.startsWith("*"))

                        return;

                //TODO Cambiar por List

                Vector entities = blockHeader.getObjects();

                if(entities.size() == 0){

                        logger.warn("El bloque "+blockHeader.getName()+" no tiene ninguna entidad");

                }

                Iterator blkEntIt = entities.iterator();

                while(blkEntIt.hasNext()){

                        DwgObject obj = (DwgObject) blkEntIt.next();

                         manageBlockEntity(obj, bPoint,

                                           insPoint, scale,

                                           rot, dwgObjectsWithoutBlocks,

                                           handleObjectsWithoutBlocks);

                }//while

        }

        public int getIndexOf(DwgObject dwgObject){

                return dwgObjects.indexOf(dwgObject);

        }

    /**

     * Changes the location of an object extracted from a block. This location will be

     * obtained through the insertion parameters from the block and the corresponding

     * insert.

     * @param entity, the entity extracted from the block.

     * @param bPoint, offset for the coordinates of the entity.

     * @param insPoint, coordinates of the insertion point for the entity.

     * @param scale, scale for the entity.

     * @param rot, rotation angle for the entity.

     * @param id, a count as a id.

     * @param dwgObjectsWithoutBlocks, a object list with the elements extracted from

     * the blocks.

     */

        private void manageBlockEntity(DwgObject entity,

                                                                        double[] bPoint,

                                                                        Point2D insPoint,

                                                                        double[] scale,

                                                                        double rot,

                                                                        List dwgObjectsWithoutBlocks,

                                                                        Map handleObjectsWithoutBlocks) {

                if(entity instanceof IDwgBlockMember){

                        IDwgBlockMember blockMember = (IDwgBlockMember)entity;

                        blockMember.transform2Block(bPoint, insPoint, scale, rot,

                                        dwgObjectsWithoutBlocks,

                                        handleObjectsWithoutBlocks,this);

                }

        }

        /**

         * Add a DWG section offset to the dwgSectionOffsets vector

         *

         * @param key Define the DWG section

         * @param seek Offset of the section

         * @param size Size of the section

         */

        public void addDwgSectionOffset(String key, int seek, int size) {

                DwgSectionOffset dso = new DwgSectionOffset(key, seek, size);

                dwgSectionOffsets.add(dso);

        }

        /**

     * Returns the offset of DWG section given by its key

         *

     * @param key Define the DWG section

         * @return int Offset of the section in the DWG file

         */

        public int getDwgSectionOffset(String key) {

                int offset = 0;

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

                        DwgSectionOffset dso = (DwgSectionOffset)dwgSectionOffsets.get(i);

                        String ikey = dso.getKey();

                        if (key.equals(ikey)) {

                                offset = dso.getSeek();

                                break;

                        }

                }

                return offset;

        }

        /**

         * Add a DWG object offset to the dwgObjectOffsets vector

         *

         * @param handle Object handle

         * @param offset Offset of the object data in the DWG file

         */

        public void addDwgObjectOffset(int handle, int offset) {

                DwgObjectOffset doo = new DwgObjectOffset(handle, offset);

                dwgObjectOffsets.add(doo);

        }

        /**

         *

         * Add a DWG object to the dwgObject vector

         *

         * @param dwgObject DWG object

         */

        public void addDwgObject(DwgObject dwgObject){

                //TODO Ver si puedo inicializar las listas especificas

                //(IDwgPolyline, etc) aqu?

                dwgObjects.add(dwgObject);

                handle_objects.put(new Integer(dwgObject.getHandle().getOffset()), dwgObject);

                /*

                 * TODO Quitar todos estos if-then y sustituirlos por un metodo callback

                 *

                 *

                 * (dwgObject.init(this), y que cada objeto haga lo que tenga que hacer

                 * */

                if(dwgObject instanceof DwgLayer){

                        this.addDwgLayer((DwgLayer) dwgObject);

                }

                //Probamos a no aplicar las extrusiones

                if(dwgObject instanceof IDwgExtrusionable){

                        ((IDwgExtrusionable)dwgObject).applyExtrussion();

                }

                if(dwgObject instanceof IDwgPolyline){

                        dwgPolylines.add(dwgObject);

                }

                if(dwgObject instanceof IDwg3DTestable){

                        if(! dwg3DFile){//if its true, we dont check again

                                dwg3DFile = ((IDwg3DTestable)dwgObject).has3DData();

                        }

                }

                if(dwgObject instanceof DwgInsert){

                        insertList.add(dwgObject);

                }

                if(dwgObject instanceof DwgBlockHeader){

                        blockList.add(dwgObject);

                }

        }

        /**

         * Returns dwgObjects from its insertion order (position

         * in the dwg file)

         *

         * @param index order in the dwg file

         * @return position

         * */

        public DwgObject getDwgObject(int index){

                return (DwgObject) dwgObjects.get(index);

        }

        public DwgObject getDwgObjectFromHandle(int handle){

                return (DwgObject) handle_objects.get(new Integer(handle));

        }

        /**

         * Add a DWG class to the dwgClasses vector

         *

         * @param dwgClass DWG class

         */

        public void addDwgClass(DwgClass dwgClass){

                dwgClasses.add(dwgClass);

        }

        public void printClasses(){

                logger.info("#### CLASSES ####");

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

                        DwgClass clazz = (DwgClass) dwgClasses.get(i);

                        logger.info(clazz.toString());

                }

                logger.info("#############");

        }

        public List getDwgClasses(){

                return dwgClasses;

        }

    /**

     * @return Returns the dwgObjectOffsets.

     */

    public ArrayList getDwgObjectOffsets() {

        return dwgObjectOffsets;

    }

    /**

     * @return Returns the dwgObjects.

     */