1 | /*
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2 | * The JTS Topology Suite is a collection of Java classes that
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3 | * implement the fundamental operations required to validate a given
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4 | * geo-spatial data set to a known topological specification.
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5 | *
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6 | * Copyright (C) 2001 Vivid Solutions
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7 | *
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8 | * This library is free software; you can redistribute it and/or
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9 | * modify it under the terms of the GNU Lesser General Public
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10 | * License as published by the Free Software Foundation; either
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11 | * version 2.1 of the License, or (at your option) any later version.
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12 | *
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13 | * This library is distributed in the hope that it will be useful,
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14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 | * Lesser General Public License for more details.
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17 | *
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18 | * You should have received a copy of the GNU Lesser General Public
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19 | * License along with this library; if not, write to the Free Software
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20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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21 | *
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22 | * For more information, contact:
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23 | *
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24 | * Vivid Solutions
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25 | * Suite #1A
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26 | * 2328 Government Street
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27 | * Victoria BC V8T 5G5
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28 | * Canada
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29 | *
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30 | * (250)385-6040
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31 | * www.vividsolutions.com
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32 | */
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33 | package com.vividsolutions.jts.geom;
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34 |
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35 | import com.vividsolutions.jts.operation.BoundaryOp;
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36 |
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37 | /**
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38 | * Models a collection of (@link LineString}s.
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39 | * <p>
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40 | * Any collection of LineStrings is a valid MultiLineString.
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41 | *
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42 | *@version 1.7
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43 | */
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44 | public class MultiLineString
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45 | extends GeometryCollection
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46 | implements Lineal
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47 | {
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48 | private static final long serialVersionUID = 8166665132445433741L;
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49 |
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50 | /**
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51 | * @param lineStrings
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52 | * the <code>LineString</code>s for this <code>MultiLineString</code>,
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53 | * or <code>null</code> or an empty array to create the empty
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54 | * geometry. Elements may be empty <code>LineString</code>s,
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55 | * but not <code>null</code>s.
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56 | */
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57 | public MultiLineString(LineString[] lineStrings, GeometryFactory factory) {
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58 | super(lineStrings, factory);
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59 | }
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60 |
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61 | public int getDimension() {
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62 | return 1;
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63 | }
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64 |
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65 | public int getBoundaryDimension() {
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66 | if (isClosed()) {
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67 | return Dimension.FALSE;
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68 | }
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69 | return 0;
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70 | }
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71 |
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72 | public String getGeometryType() {
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73 | return "MultiLineString";
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74 | }
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75 |
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76 | public boolean isClosed() {
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77 | if (isEmpty()) {
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78 | return false;
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79 | }
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80 | for (int i = 0; i < geometries.length; i++) {
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81 | if (!((LineString) geometries[i]).isClosed()) {
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82 | return false;
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83 | }
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84 | }
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85 | return true;
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86 | }
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87 |
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88 | /**
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89 | * Gets the boundary of this geometry.
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90 | * The boundary of a lineal geometry is always a zero-dimensional geometry (which may be empty).
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91 | *
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92 | * @return the boundary geometry
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93 | * @see Geometry#getBoundary
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94 | */
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95 | public Geometry getBoundary()
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96 | {
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97 | return (new BoundaryOp(this)).getBoundary();
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98 | }
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99 |
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100 | /**
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101 | * Creates a {@link MultiLineString} in the reverse
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102 | * order to this object.
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103 | * Both the order of the component LineStrings
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104 | * and the order of their coordinate sequences
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105 | * are reversed.
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106 | *
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107 | * @return a {@link MultiLineString} in the reverse order
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108 | */
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109 | public Geometry reverse()
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110 | {
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111 | int nLines = geometries.length;
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112 | LineString[] revLines = new LineString[nLines];
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113 | for (int i = 0; i < geometries.length; i++) {
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114 | revLines[nLines - 1 - i] = (LineString)geometries[i].reverse();
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115 | }
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116 | return getFactory().createMultiLineString(revLines);
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117 | }
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118 |
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119 | public boolean equalsExact(Geometry other, double tolerance) {
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120 | if (!isEquivalentClass(other)) {
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121 | return false;
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122 | }
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123 | return super.equalsExact(other, tolerance);
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124 | }
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125 |
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126 | }
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127 |
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