LineString.js

import hasInterface from '../../../../hasInterface.js'
import Length from '../algorithm/Length.js'
import IllegalArgumentException from '../../../../java/lang/IllegalArgumentException.js'
import GeometryComponentFilter from './GeometryComponentFilter.js'
import UnsupportedOperationException from '../../../../java/lang/UnsupportedOperationException.js'
import CoordinateArrays from './CoordinateArrays.js'
import Dimension from './Dimension.js'
import Envelope from './Envelope.js'
import Geometry from './Geometry.js'
import CoordinateFilter from './CoordinateFilter.js'
import Lineal from './Lineal.js'
import CoordinateSequences from './CoordinateSequences.js'
import GeometryFilter from './GeometryFilter.js'
import CoordinateSequenceFilter from './CoordinateSequenceFilter.js'
export default class LineString extends Geometry {
  constructor() {
    super()
    LineString.constructor_.apply(this, arguments)
  }
  static constructor_() {
    this._points = null
    if (arguments.length === 0) {} else if (arguments.length === 2) {
      const points = arguments[0], factory = arguments[1]
      Geometry.constructor_.call(this, factory)
      this.init(points)
    }
  }
  computeEnvelopeInternal() {
    if (this.isEmpty()) 
      return new Envelope()
    
    return this._points.expandEnvelope(new Envelope())
  }
  isRing() {
    return this.isClosed() && CoordinateArrays.isRing(this.getCoordinates())
  }
  getCoordinates() {
    return this._points.toCoordinateArray()
  }
  copyInternal() {
    return new LineString(this._points.copy(), this._factory)
  }
  equalsExact() {
    if (arguments.length === 2 && (typeof arguments[1] === 'number' && arguments[0] instanceof Geometry)) {
      const other = arguments[0], tolerance = arguments[1]
      if (!this.isEquivalentClass(other)) 
        return false
      
      const otherLineString = other
      if (this._points.size() !== otherLineString._points.size()) 
        return false
      
      for (let i = 0; i < this._points.size(); i++) 
        if (!this.equal(this._points.getCoordinate(i), otherLineString._points.getCoordinate(i), tolerance)) 
          return false
        
      
      return true
    } else {
      return super.equalsExact.apply(this, arguments)
    }
  }
  isClosed() {
    if (this.isEmpty()) 
      return false
    
    return this.getCoordinateN(0).equals2D(this.getCoordinateN(this.getNumPoints() - 1))
  }
  reverseInternal() {
    const seq = this._points.copy()
    CoordinateSequences.reverse(seq)
    return this.getFactory().createLineString(seq)
  }
  getEndPoint() {
    if (this.isEmpty()) 
      return null
    
    return this.getPointN(this.getNumPoints() - 1)
  }
  getTypeCode() {
    return Geometry.TYPECODE_LINESTRING
  }
  getDimension() {
    return 1
  }
  getBoundary() {
    throw new UnsupportedOperationException()
  }
  isEquivalentClass(other) {
    return other instanceof LineString
  }
  getCoordinateSequence() {
    return this._points
  }
  getPointN(n) {
    return this.getFactory().createPoint(this._points.getCoordinate(n))
  }
  normalize() {
    for (let i = 0; i < Math.trunc(this._points.size() / 2); i++) {
      const j = this._points.size() - 1 - i
      if (!this._points.getCoordinate(i).equals(this._points.getCoordinate(j))) {
        if (this._points.getCoordinate(i).compareTo(this._points.getCoordinate(j)) > 0) {
          const copy = this._points.copy()
          CoordinateSequences.reverse(copy)
          this._points = copy
        }
        return null
      }
    }
  }
  getCoordinate() {
    if (this.isEmpty()) return null
    return this._points.getCoordinate(0)
  }
  getBoundaryDimension() {
    if (this.isClosed()) 
      return Dimension.FALSE
    
    return 0
  }
  getLength() {
    return Length.ofLine(this._points)
  }
  getNumPoints() {
    return this._points.size()
  }
  compareToSameClass() {
    if (arguments.length === 1) {
      const o = arguments[0]
      const line = o
      let i = 0
      let j = 0
      while (i < this._points.size() && j < line._points.size()) {
        const comparison = this._points.getCoordinate(i).compareTo(line._points.getCoordinate(j))
        if (comparison !== 0) 
          return comparison
        
        i++
        j++
      }
      if (i < this._points.size()) 
        return 1
      
      if (j < line._points.size()) 
        return -1
      
      return 0
    } else if (arguments.length === 2) {
      const o = arguments[0], comp = arguments[1]
      const line = o
      return comp.compare(this._points, line._points)
    }
  }
  apply() {
    if (hasInterface(arguments[0], CoordinateFilter)) {
      const filter = arguments[0]
      for (let i = 0; i < this._points.size(); i++) 
        filter.filter(this._points.getCoordinate(i))
      
    } else if (hasInterface(arguments[0], CoordinateSequenceFilter)) {
      const filter = arguments[0]
      if (this._points.size() === 0) return null
      for (let i = 0; i < this._points.size(); i++) {
        filter.filter(this._points, i)
        if (filter.isDone()) break
      }
      if (filter.isGeometryChanged()) this.geometryChanged()
    } else if (hasInterface(arguments[0], GeometryFilter)) {
      const filter = arguments[0]
      filter.filter(this)
    } else if (hasInterface(arguments[0], GeometryComponentFilter)) {
      const filter = arguments[0]
      filter.filter(this)
    }
  }
  getCoordinateN(n) {
    return this._points.getCoordinate(n)
  }
  getGeometryType() {
    return Geometry.TYPENAME_LINESTRING
  }
  isEmpty() {
    return this._points.size() === 0
  }
  init(points) {
    if (points === null) 
      points = this.getFactory().getCoordinateSequenceFactory().create([])
    
    if (points.size() === 1) 
      throw new IllegalArgumentException('Invalid number of points in LineString (found ' + points.size() + ' - must be 0 or >= 2)')
    
    this._points = points
  }
  isCoordinate(pt) {
    for (let i = 0; i < this._points.size(); i++) 
      if (this._points.getCoordinate(i).equals(pt)) 
        return true
      
    
    return false
  }
  getStartPoint() {
    if (this.isEmpty()) 
      return null
    
    return this.getPointN(0)
  }
  get interfaces_() {
    return [Lineal]
  }
}