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The Esri Geometry API for Java enables developers to write custom applications for analysis of spatial data.
/*
Copyright 1995-2017 Esri
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
For additional information, contact:
Environmental Systems Research Institute, Inc.
Attn: Contracts Dept
380 New York Street
Redlands, California, USA 92373
email: [email protected]
*/
package com.esri.core.geometry.ogc;
import com.esri.core.geometry.Geometry;
import com.esri.core.geometry.GeometryEngine;
import com.esri.core.geometry.MultiPath;
import com.esri.core.geometry.Operator;
import com.esri.core.geometry.OperatorExportToWkb;
import com.esri.core.geometry.OperatorFactoryLocal;
import com.esri.core.geometry.Polyline;
import com.esri.core.geometry.SpatialReference;
import com.esri.core.geometry.WkbExportFlags;
import com.esri.core.geometry.WktExportFlags;
import java.nio.ByteBuffer;
public class OGCLineString extends OGCCurve {
/**
* The number of Points in this LineString.
*/
public int numPoints() {
if (multiPath.isEmpty())
return 0;
int d = multiPath.isClosedPath(0) ? 1 : 0;
return multiPath.getPointCount() + d;
}
@Override
public String asText() {
return GeometryEngine.geometryToWkt(getEsriGeometry(),
WktExportFlags.wktExportLineString);
}
@Override
public ByteBuffer asBinary() {
OperatorExportToWkb op = (OperatorExportToWkb) OperatorFactoryLocal
.getInstance().getOperator(Operator.Type.ExportToWkb);
return op.execute(WkbExportFlags.wkbExportLineString,
getEsriGeometry(), null);
}
/**
* Returns the specified Point N in this LineString.
* @param n The 0 based index of the Point.
*/
public OGCPoint pointN(int n) {
int nn;
if (multiPath.isClosedPath(0) && n == multiPath.getPathSize(0)) {
nn = multiPath.getPathStart(0);
} else
nn = n + multiPath.getPathStart(0);
return (OGCPoint) OGCGeometry.createFromEsriGeometry(
multiPath.getPoint(nn), esriSR);
}
@Override
public boolean isClosed() {
return multiPath.isClosedPathInXYPlane(0);
}
public OGCLineString(MultiPath mp, int pathIndex, SpatialReference sr) {
multiPath = new Polyline();
if (!mp.isEmpty())
multiPath.addPath(mp, pathIndex, true);
esriSR = sr;
}
public OGCLineString(MultiPath mp, int pathIndex, SpatialReference sr,
boolean reversed) {
multiPath = new Polyline();
if (!mp.isEmpty())
multiPath.addPath(mp, pathIndex, !reversed);
esriSR = sr;
}
@Override
public double length() {
return multiPath.calculateLength2D();
}
@Override
public OGCPoint startPoint() {
return pointN(0);
}
@Override
public OGCPoint endPoint() {
return pointN(numPoints() - 1);
}
@Override
public String geometryType() {
return "LineString";
}
@Override
public OGCGeometry locateAlong(double mValue) {
throw new UnsupportedOperationException();
}
@Override
public OGCGeometry locateBetween(double mStart, double mEnd) {
throw new UnsupportedOperationException();
}
@Override
public Geometry getEsriGeometry() {
return multiPath;
}
@Override
public OGCGeometry convertToMulti()
{
return new OGCMultiLineString((Polyline)multiPath, esriSR);
}
MultiPath multiPath;
}