com.vividsolutions.jtstest.testbuilder.io.shapefile.MultiLineHandler Maven / Gradle / Ivy

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package com.vividsolutions.jtstest.testbuilder.io.shapefile;

import java.io.IOException;

import com.vividsolutions.jts.geom.*;

/**
 * Wrapper for a Shapefile arc.
 */
public class MultiLineHandler implements ShapeHandler{
    
     int myShapeType= -1;
     
    public MultiLineHandler()
    {
        myShapeType = 3;
    }
    
     public MultiLineHandler(int type) throws InvalidShapefileException
        {
            if  ( (type != 3) &&  (type != 13) &&  (type != 23) )
                throw new InvalidShapefileException("MultiLineHandler constructor - expected type to be 3,13 or 23");
            
            myShapeType = type;
    }
    
    
    public Geometry read( EndianDataInputStream file , GeometryFactory geometryFactory, int contentLength) throws IOException,InvalidShapefileException 
    {
        
        double junk;
		int actualReadWords = 0; //actual number of words read (word = 16bits)
       
        
        //file.setLittleEndianMode(true);
        
        int shapeType = file.readIntLE();
		actualReadWords += 2;
        
        if (shapeType ==0)
        {
             return new MultiLineString(null,new PrecisionModel(),0); //null shape
        }
        
        if (shapeType != myShapeType)
        {
            throw new InvalidShapefileException("MultilineHandler.read()  - file says its type "+shapeType+" but i'm expecting type "+myShapeType);
        }
        
            //read bounding box (not needed)
        junk = file.readDoubleLE();
        junk =file.readDoubleLE();
        junk =file.readDoubleLE();
        junk =file.readDoubleLE();
		actualReadWords += 4*4;
  
        
        int numParts = file.readIntLE();
        int numPoints = file.readIntLE();//total number of points
		actualReadWords += 4;
        
        
        int[] partOffsets = new int[numParts];
        
        //points = new Coordinate[numPoints];
        
        for ( int i = 0; i < numParts; i++ ){
            partOffsets[i]=file.readIntLE();
			actualReadWords += 2;
        }
        
        LineString lines[] = new LineString[numParts];
        Coordinate[] coords = new Coordinate[numPoints];
        
        for (int t =0;t=13)
        {
          //  int fullLength =  22 + 2*numParts + (numPoints * 8) + 4+4+4*numPoints+ 4+4+4*numPoints;
		    int fullLength;
            if (myShapeType == 13)
            {
            	//polylineZ (with M)
				fullLength =  22 + 2*numParts + (numPoints * 8) + 4+4+4*numPoints+ 4+4+4*numPoints;
            }
            else
            {
				//	polylineM (with M)
				fullLength =  22 + 2*numParts + (numPoints * 8) + 4+4+4*numPoints;
            }
            if (contentLength >= fullLength) //are ms actually there?
            {
                 junk =file.readDoubleLE();  //m min, max
                 junk =file.readDoubleLE();
				 actualReadWords += 8;

                for (int t =0;t zmax)
                        zmax = z;
                }
                else
                {
                    validZFound = true;
                    zmin =  z ;
                    zmax =  z ;
                }
            }
           
        }
        
        result[0] = (zmin);
        result[1] = (zmax);
        return result;
        
    }
    
    
}

/*
 * $Log: MultiLineHandler.java,v $
 * Revision 1.1  2009/10/14 04:21:21  mbdavis
 * added drag-n-drop for reading shp files
 *
 * Revision 1.4  2003/07/25 18:49:15  dblasby
 * Allow "extra" data after the content.  Fixes the ICI shapefile bug.
 *
 * Revision 1.3  2003/02/04 02:10:37  jaquino
 * Feature: EditWMSQuery dialog
 *
 * Revision 1.2  2003/01/22 18:31:05  jaquino
 * Enh: Make About Box configurable
 *
 * Revision 1.3  2002/10/30 22:36:11  dblasby
 * Line reader now returns LINESTRING(..) if there is only one part to the arc
 * polyline.
 *
 * Revision 1.2  2002/09/09 20:46:22  dblasby
 * Removed LEDatastream refs and replaced with EndianData[in/out]putstream
 *
 * Revision 1.1  2002/08/27 21:04:58  dblasby
 * orginal
 *
 * Revision 1.2  2002/03/05 10:23:59  jmacgill
 * made sure geometries were created using the factory methods
 *
 * Revision 1.1  2002/02/28 00:38:50  jmacgill
 * Renamed files to more intuitve names
 *
 * Revision 1.3  2002/02/13 00:23:53  jmacgill
 * First semi working JTS version of Shapefile code
 *
 * Revision 1.2  2002/02/11 18:42:45  jmacgill
 * changed read and write statements so that they produce and take Geometry objects instead of specific MultiLine objects
 * changed parts[] array name to partOffsets[] for clarity and consistency with ShapePolygon
 *
 * Revision 1.1  2002/02/11 16:54:43  jmacgill
 * added shapefile code and directories
 *
 */