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/*
Copyright 1995-2018 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.hazelcast.com.esri.core.geometry.ogc;
import com.hazelcast.com.esri.core.geometry.Envelope;
import com.hazelcast.com.esri.core.geometry.GeoJsonExportFlags;
import com.hazelcast.com.esri.core.geometry.Geometry;
import com.hazelcast.com.esri.core.geometry.GeometryCursor;
import com.hazelcast.com.esri.core.geometry.GeometryException;
import com.hazelcast.com.esri.core.geometry.MultiPath;
import com.hazelcast.com.esri.core.geometry.MultiPoint;
import com.hazelcast.com.esri.core.geometry.MultiVertexGeometry;
import com.hazelcast.com.esri.core.geometry.NumberUtils;
import com.hazelcast.com.esri.core.geometry.OGCStructureInternal;
import com.hazelcast.com.esri.core.geometry.OperatorConvexHull;
import com.hazelcast.com.esri.core.geometry.OperatorDifference;
import com.hazelcast.com.esri.core.geometry.OperatorExportToGeoJson;
import com.hazelcast.com.esri.core.geometry.OperatorIntersection;
import com.hazelcast.com.esri.core.geometry.OperatorUnion;
import com.hazelcast.com.esri.core.geometry.Point;
import com.hazelcast.com.esri.core.geometry.Polygon;
import com.hazelcast.com.esri.core.geometry.Polyline;
import com.hazelcast.com.esri.core.geometry.SimpleGeometryCursor;
import com.hazelcast.com.esri.core.geometry.SpatialReference;
import com.hazelcast.com.esri.core.geometry.VertexDescription;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.util.ArrayList;
import java.util.List;
import static com.hazelcast.com.esri.core.geometry.SizeOf.SIZE_OF_OGC_CONCRETE_GEOMETRY_COLLECTION;
public class OGCConcreteGeometryCollection extends OGCGeometryCollection {
static public String TYPE = "GeometryCollection";
List geometries;
public OGCConcreteGeometryCollection(List geoms,
SpatialReference sr) {
geometries = geoms;
esriSR = sr;
}
public OGCConcreteGeometryCollection(GeometryCursor geoms,
SpatialReference sr) {
List ogcGeoms = new ArrayList(10);
for (Geometry g = geoms.next(); g != null; g = geoms.next()) {
ogcGeoms.add(createFromEsriGeometry(g, sr));
}
geometries = ogcGeoms;
esriSR = sr;
}
public OGCConcreteGeometryCollection(OGCGeometry geom, SpatialReference sr) {
geometries = new ArrayList(1);
geometries.add(geom);
esriSR = sr;
}
public OGCConcreteGeometryCollection(SpatialReference sr) {
geometries = new ArrayList();
esriSR = sr;
}
@Override
public int dimension() {
int maxD = 0;
for (int i = 0, n = numGeometries(); i < n; i++)
maxD = Math.max(geometryN(i).dimension(), maxD);
return maxD;
}
@Override
public int coordinateDimension() {
return isEmpty() ? 2 : geometryN(0).coordinateDimension();
}
@Override
public boolean is3D() {
return !isEmpty() && geometries.get(0).is3D();
}
@Override
public boolean isMeasured() {
return !isEmpty() && geometries.get(0).isMeasured();
}
@Override
public OGCGeometry envelope() {
GeometryCursor gc = getEsriGeometryCursor();
Envelope env = new Envelope();
for (Geometry g = gc.next(); g != null; g = gc.next()) {
Envelope e = new Envelope();
g.queryEnvelope(e);
env.merge(e);
}
Polygon polygon = new Polygon();
polygon.addEnvelope(env, false);
return new OGCPolygon(polygon, esriSR);
}
@Override
public int numGeometries() {
return geometries.size();
}
@Override
public OGCGeometry geometryN(int n) {
return geometries.get(n);
}
@Override
public String geometryType() {
return TYPE;
}
@Override
public long estimateMemorySize()
{
long size = SIZE_OF_OGC_CONCRETE_GEOMETRY_COLLECTION;
if (geometries != null) {
for (OGCGeometry geometry : geometries) {
size += geometry.estimateMemorySize();
}
}
return size;
}
@Override
public String asText() {
StringBuilder sb = new StringBuilder("GEOMETRYCOLLECTION ");
if (is3D()) {
sb.append('Z');
}
if (isMeasured()) {
sb.append('M');
}
if (is3D() || isMeasured())
sb.append(' ');
int n = numGeometries();
if (n == 0) {
sb.append("EMPTY");
return sb.toString();
}
sb.append('(');
for (int i = 0; i < n; i++) {
if (i > 0)
sb.append(", ");
sb.append(geometryN(i).asText());
}
sb.append(')');
return sb.toString();
}
@Override
public ByteBuffer asBinary() {
ArrayList buffers = new ArrayList(0);
int size = 9;
int n = numGeometries();
for (int i = 0; i < n; i++) {
ByteBuffer buffer = geometryN(i).asBinary();
buffers.add(buffer);
size += buffer.capacity();
}
ByteBuffer wkbBuffer = ByteBuffer.allocate(size).order(
ByteOrder.nativeOrder());
byte byteOrder = (byte) (wkbBuffer.order() == ByteOrder.LITTLE_ENDIAN ? 1
: 0);
int wkbType = 7;
if (is3D())
wkbType += 1000;
if (isMeasured())
wkbType += 2000;
wkbBuffer.put(0, byteOrder);
wkbBuffer.putInt(1, wkbType);
wkbBuffer.putInt(5, n);
int offset = 9;
for (int i = 0; i < n; i++) {
byte[] arr = buffers.get(i).array();
System.arraycopy(arr, 0, wkbBuffer.array(), offset, arr.length);
offset += arr.length;
}
return wkbBuffer;
}
@Override
public String asGeoJson() {
return asGeoJsonImpl(GeoJsonExportFlags.geoJsonExportDefaults);
}
@Override
String asGeoJsonImpl(int export_flags) {
StringBuilder sb = new StringBuilder();
sb.append("{\"type\":\"GeometryCollection\",\"geometries\":");
sb.append("[");
for (int i = 0, n = numGeometries(); i < n; i++) {
if (i > 0)
sb.append(",");
if (geometryN(i) != null)
sb.append(geometryN(i).asGeoJsonImpl(GeoJsonExportFlags.geoJsonExportSkipCRS));
}
sb.append("],\"crs\":");
if (esriSR != null) {
String crs_value = OperatorExportToGeoJson.local().exportSpatialReference(0, esriSR);
sb.append(crs_value);
} else {
sb.append("\"null\"");
}
sb.append("}");
return sb.toString();
}
@Override
public boolean isEmpty() {
return numGeometries() == 0;
}
@Override
public double MinZ() {
double z = Double.NaN;
for (int i = 0, n = numGeometries(); i < n; i++)
z = i == 0 ? geometryN(i).MinZ() : Math.min(geometryN(i).MinZ(), z);
return z;
}
@Override
public double MaxZ() {
double z = Double.NaN;
for (int i = 0, n = numGeometries(); i < n; i++)
z = i == 0 ? geometryN(i).MaxZ() : Math.min(geometryN(i).MaxZ(), z);
return z;
}
@Override
public double MinMeasure() {
double z = Double.NaN;
for (int i = 0, n = numGeometries(); i < n; i++)
z = i == 0 ? geometryN(i).MinMeasure() : Math.min(geometryN(i)
.MinMeasure(), z);
return z;
}
@Override
public double MaxMeasure() {
double z = Double.NaN;
for (int i = 0, n = numGeometries(); i < n; i++)
z = i == 0 ? geometryN(i).MaxMeasure() : Math.min(geometryN(i)
.MaxMeasure(), z);
return z;
}
@Override
public boolean isSimple() {
for (int i = 0, n = numGeometries(); i < n; i++)
if (!geometryN(i).isSimple())
return false;
return true;
}
/**
* makeSimpleRelaxed is not supported for the GeometryCollection instance.
*
*/
@Override
public OGCGeometry makeSimple() {
throw new UnsupportedOperationException();
}
@Override
public boolean isSimpleRelaxed() {
for (int i = 0, n = numGeometries(); i < n; i++)
if (!geometryN(i).isSimpleRelaxed())
return false;
return true;
}
/**
* makeSimpleRelaxed is not supported for the GeometryCollection instance.
*
*/
@Override
public OGCGeometry makeSimpleRelaxed(boolean forceProcessing) {
throw new UnsupportedOperationException();
}
@Override
public OGCGeometry boundary() {
throw new UnsupportedOperationException();
}
@Override
public OGCGeometry locateAlong(double mValue) {
// TODO Auto-generated method stub
throw new UnsupportedOperationException();
}
@Override
public OGCGeometry locateBetween(double mStart, double mEnd) {
// TODO Auto-generated method stub
throw new UnsupportedOperationException();
}
@Override
public Geometry getEsriGeometry() {
return null;
}
@Override
public GeometryCursor getEsriGeometryCursor() {
return new GeometryCursorOGC(geometries);
}
@Override
protected boolean isConcreteGeometryCollection() {
return true;
}
private static class GeometryCursorOGC extends GeometryCursor {
private int m_index;
private int m_ind;
private List m_geoms;
GeometryCursor m_curs;
GeometryCursorOGC(List geoms) {
m_geoms = geoms;
m_index = -1;
m_curs = null;
m_ind = 0;
}
@Override
public Geometry next() {
while (true) {
if (m_curs != null) {
Geometry g = m_curs.next();
if (g != null) {
m_index++;
return g;
}
m_curs = null;
}
if (m_ind >= m_geoms.size())
return null;
int i = m_ind;
m_ind++;
if (m_geoms.get(i) == null)
continue;// filter out nulls
if (!m_geoms.get(i).isConcreteGeometryCollection()) {
m_index++;
return m_geoms.get(i).getEsriGeometry();
} else {
OGCConcreteGeometryCollection gc = (OGCConcreteGeometryCollection) m_geoms
.get(i);
m_curs = new GeometryCursorOGC(gc.geometries);
return next();
}
}
}
@Override
public int getGeometryID() {
return m_index;
}
}
@Override
public OGCGeometry convexHull() {
GeometryCursor cursor = OperatorConvexHull.local().execute(
getEsriGeometryCursor(), false, null);
MultiPoint mp = new MultiPoint();
Polygon polygon = new Polygon();
VertexDescription vd = null;
for (Geometry geom = cursor.next(); geom != null; geom = cursor.next()) {
vd = geom.getDescription();
if (geom.isEmpty())
continue;
if (geom.getType() == Geometry.Type.Polygon) {
polygon.add((MultiPath) geom, false);
}
else if (geom.getType() == Geometry.Type.Polyline) {
mp.add((MultiVertexGeometry) geom, 0, -1);
}
else if (geom.getType() == Geometry.Type.Point) {
mp.add((Point) geom);
}
else {
throw new GeometryException("internal error");
}
}
Geometry resultGeom = null;
if (!mp.isEmpty()) {
resultGeom = OperatorConvexHull.local().execute(mp, null);
}
if (!polygon.isEmpty()) {
if (!resultGeom.isEmpty()) {
Geometry[] geoms = { resultGeom, polygon };
resultGeom = OperatorConvexHull.local().execute(
new SimpleGeometryCursor(geoms), true, null).next();
}
else {
resultGeom = polygon;
}
}
if (resultGeom == null) {
Point pt = new Point();
if (vd != null)
pt.assignVertexDescription(vd);
return new OGCPoint(pt, getEsriSpatialReference());
}
return OGCGeometry.createFromEsriGeometry(resultGeom, getEsriSpatialReference(), false);
}
@Override
public void setSpatialReference(SpatialReference esriSR_) {
esriSR = esriSR_;
for (int i = 0, n = geometries.size(); i < n; i++) {
if (geometries.get(i) != null)
geometries.get(i).setSpatialReference(esriSR_);
}
}
@Override
public OGCGeometry convertToMulti() {
return this;
}
@Override
public OGCGeometry reduceFromMulti() {
int n = numGeometries();
if (n == 0) {
return this;
}
if (n == 1) {
return geometryN(0).reduceFromMulti();
}
return this;
}
@Override
public String asJson() {
throw new UnsupportedOperationException();
}
@Override
public boolean equals(Object other) {
if (other == null)
return false;
if (other == this)
return true;
if (other.getClass() != getClass())
return false;
OGCConcreteGeometryCollection another = (OGCConcreteGeometryCollection)other;
if (geometries != null) {
if (!geometries.equals(another.geometries))
return false;
}
else if (another.geometries != null)
return false;
if (esriSR == another.esriSR) {
return true;
}
if (esriSR != null && another.esriSR != null) {
return esriSR.equals(another.esriSR);
}
return false;
}
@Override
public int hashCode() {
int hash = 1;
if (geometries != null)
hash = geometries.hashCode();
if (esriSR != null)
hash = NumberUtils.hashCombine(hash, esriSR.hashCode());
return hash;
}
@Override
public double distance(OGCGeometry another) {
if (this == another)
return isEmpty() ? Double.NaN : 0;
double minD = Double.NaN;
for (int i = 0, n = numGeometries(); i < n; ++i) {
// TODO Skip expensive distance computation if bounding boxes are further away than minD
double d = geometryN(i).distance(another);
if (d < minD || Double.isNaN(minD)) {
minD = d;
// TODO Replace zero with tolerance defined by the spatial reference
if (minD == 0) {
break;
}
}
}
return minD;
}
//
//Relational operations
@Override
public boolean overlaps(OGCGeometry another) {
//TODO
throw new UnsupportedOperationException();
}
@Override
public boolean touches(OGCGeometry another) {
//TODO
throw new UnsupportedOperationException();
}
@Override
public boolean crosses(OGCGeometry another) {
//TODO
throw new UnsupportedOperationException();
}
@Override
public boolean relate(OGCGeometry another, String matrix) {
throw new UnsupportedOperationException();
}
@Override
public boolean disjoint(OGCGeometry another) {
if (isEmpty() || another.isEmpty())
return true;
if (this == another)
return false;
//TODO: a simple envelope test
OGCConcreteGeometryCollection flattened1 = flatten();
if (flattened1.isEmpty())
return true;
OGCConcreteGeometryCollection otherCol = new OGCConcreteGeometryCollection(another, esriSR);
OGCConcreteGeometryCollection flattened2 = otherCol.flatten();
if (flattened2.isEmpty())
return true;
for (int i = 0, n1 = flattened1.numGeometries(); i < n1; ++i) {
OGCGeometry g1 = flattened1.geometryN(i);
for (int j = 0, n2 = flattened2.numGeometries(); j < n2; ++j) {
OGCGeometry g2 = flattened2.geometryN(j);
if (!g1.disjoint(g2))
return false;
}
}
return true;
}
@Override
public boolean contains(OGCGeometry another) {
if (isEmpty() || another.isEmpty())
return false;
if (this == another)
return true;
return another.difference(this).isEmpty();
}
@Override
public boolean Equals(OGCGeometry another) {
if (this == another)
return !isEmpty();
if (another == null)
return false;
OGCGeometry g1 = reduceFromMulti();
String t1 = g1.geometryType();
OGCGeometry g2 = reduceFromMulti();
if (t1 != g2.geometryType()) {
return false;
}
if (t1 != OGCConcreteGeometryCollection.TYPE) {
return g1.Equals(g2);
}
OGCConcreteGeometryCollection gc1 = (OGCConcreteGeometryCollection)g1;
OGCConcreteGeometryCollection gc2 = (OGCConcreteGeometryCollection)g2;
// TODO Assuming input geometries are simple and valid, remove-overlaps would be a no-op.
// Hence, calling flatten() should be sufficient.
gc1 = gc1.flattenAndRemoveOverlaps();
gc2 = gc2.flattenAndRemoveOverlaps();
int n = gc1.numGeometries();
if (n != gc2.numGeometries()) {
return false;
}
for (int i = 0; i < n; ++i) {
if (!gc1.geometryN(i).Equals(gc2.geometryN(i))) {
return false;
}
}
return n > 0;
}
private static OGCConcreteGeometryCollection toGeometryCollection(OGCGeometry geometry)
{
if (geometry.geometryType() != OGCConcreteGeometryCollection.TYPE) {
return new OGCConcreteGeometryCollection(geometry, geometry.getEsriSpatialReference());
}
return (OGCConcreteGeometryCollection) geometry;
}
private static List toList(GeometryCursor cursor)
{
List geometries = new ArrayList();
for (Geometry geometry = cursor.next(); geometry != null; geometry = cursor.next()) {
geometries.add(geometry);
}
return geometries;
}
//Topological
@Override
public OGCGeometry difference(OGCGeometry another) {
if (isEmpty() || another.isEmpty()) {
return this;
}
List geometries = toList(prepare_for_ops_(toGeometryCollection(this)));
List otherGeometries = toList(prepare_for_ops_(toGeometryCollection(another)));
List result = new ArrayList();
for (Geometry geometry : geometries) {
for (Geometry otherGeometry : otherGeometries) {
if (geometry.getDimension() > otherGeometry.getDimension()) {
continue; //subtracting lower dimension has no effect.
}
geometry = OperatorDifference.local().execute(geometry, otherGeometry, esriSR, null);
if (geometry.isEmpty()) {
break;
}
}
if (!geometry.isEmpty()) {
result.add(OGCGeometry.createFromEsriGeometry(geometry, esriSR));
}
}
if (result.size() == 1) {
return result.get(0).reduceFromMulti();
}
return new OGCConcreteGeometryCollection(result, esriSR).flattenAndRemoveOverlaps();
}
@Override
public OGCGeometry intersection(OGCGeometry another) {
if (isEmpty() || another.isEmpty()) {
return new OGCConcreteGeometryCollection(esriSR);
}
List geometries = toList(prepare_for_ops_(toGeometryCollection(this)));
List otherGeometries = toList(prepare_for_ops_(toGeometryCollection(another)));
List result = new ArrayList();
for (Geometry geometry : geometries) {
for (Geometry otherGeometry : otherGeometries) {
GeometryCursor intersectionCursor = OperatorIntersection.local().execute(new SimpleGeometryCursor(geometry), new SimpleGeometryCursor(otherGeometry), esriSR, null, 7);
OGCGeometry intersection = OGCGeometry.createFromEsriCursor(intersectionCursor, esriSR, true);
if (!intersection.isEmpty()) {
result.add(intersection);
}
}
}
if (result.size() == 1) {
return result.get(0).reduceFromMulti();
}
return new OGCConcreteGeometryCollection(result, esriSR).flattenAndRemoveOverlaps();
}
@Override
public OGCGeometry symDifference(OGCGeometry another) {
//TODO
throw new UnsupportedOperationException();
}
/**
* Checks if collection is flattened.
* @return True for the flattened collection. A flattened collection contains up to three non-empty geometries:
* an OGCMultiPoint, an OGCMultiPolygon, and an OGCMultiLineString.
*/
public boolean isFlattened() {
int n = numGeometries();
if (n > 3)
return false;
int dimension = -1;
for (int i = 0; i < n; ++i) {
OGCGeometry g = geometryN(i);
if (g.isEmpty())
return false;//no empty allowed
String t = g.geometryType();
if (t != OGCMultiPoint.TYPE && t != OGCMultiPolygon.TYPE && t != OGCMultiLineString.TYPE)
return false;
//check strict order of geometry dimensions
int d = g.dimension();
if (d <= dimension)
return false;
dimension = d;
}
return true;
}
/**
* Flattens Geometry Collection.
* The result collection contains up to three geometries:
* an OGCMultiPoint, an OGCMultilineString, and an OGCMultiPolygon (in that order).
* @return A flattened Geometry Collection, or self if already flattened.
*/
public OGCConcreteGeometryCollection flatten() {
if (isFlattened()) {
return this;
}
OGCMultiPoint multiPoint = null;
ArrayList polygons = null;
OGCMultiLineString polyline = null;
GeometryCursor gc = getEsriGeometryCursor();
for (Geometry g = gc.next(); g != null; g = gc.next()) {
if (g.isEmpty())
continue;
Geometry.Type t = g.getType();
if (t == Geometry.Type.Point) {
if (multiPoint == null) {
multiPoint = new OGCMultiPoint(esriSR);
}
((MultiPoint)multiPoint.getEsriGeometry()).add((Point)g);
continue;
}
if (t == Geometry.Type.MultiPoint) {
if (multiPoint == null)
multiPoint = new OGCMultiPoint(esriSR);
((MultiPoint)multiPoint.getEsriGeometry()).add((MultiPoint)g, 0, -1);
continue;
}
if (t == Geometry.Type.Polyline) {
if (polyline == null)
polyline = new OGCMultiLineString(esriSR);
((MultiPath)polyline.getEsriGeometry()).add((Polyline)g, false);
continue;
}
if (t == Geometry.Type.Polygon) {
if (polygons == null)
polygons = new ArrayList();
polygons.add(g);
continue;
}
throw new GeometryException("internal error");//what else?
}
List list = new ArrayList();
if (multiPoint != null)
list.add(multiPoint);
if (polyline != null)
list.add(polyline);
if (polygons != null) {
GeometryCursor unionedPolygons = OperatorUnion.local().execute(new SimpleGeometryCursor(polygons), esriSR, null);
Geometry g = unionedPolygons.next();
if (!g.isEmpty()) {
list.add(new OGCMultiPolygon((Polygon)g, esriSR));
}
}
return new OGCConcreteGeometryCollection(list, esriSR);
}
/**
* Fixes topological overlaps in the GeometryCollecion.
* This is equivalent to union of the geometry collection elements.
*
* TODO "flattened" collection is supposed to contain only mutli-geometries, but this method may return single geometries
* e.g. for GEOMETRYCOLLECTION (LINESTRING (...)) it returns GEOMETRYCOLLECTION (LINESTRING (...))
* and not GEOMETRYCOLLECTION (MULTILINESTRING (...))
* @return A geometry collection that is flattened and has no overlapping elements.
*/
public OGCConcreteGeometryCollection flattenAndRemoveOverlaps() {
//flatten and crack/cluster
GeometryCursor cursor = OGCStructureInternal.prepare_for_ops_(flatten().getEsriGeometryCursor(), esriSR);
//make sure geometries don't overlap
return new OGCConcreteGeometryCollection(removeOverlapsHelper_(toList(cursor)), esriSR);
}
private GeometryCursor removeOverlapsHelper_(List geoms) {
List result = new ArrayList();
for (int i = 0; i < geoms.size(); ++i) {
Geometry current = geoms.get(i);
if (current.isEmpty())
continue;
for (int j = i + 1; j < geoms.size(); ++j) {
Geometry subG = geoms.get(j);
current = OperatorDifference.local().execute(current, subG, esriSR, null);
if (current.isEmpty())
break;
}
if (current.isEmpty())
continue;
result.add(current);
}
return new SimpleGeometryCursor(result);
}
private static class FlatteningCollectionCursor extends GeometryCursor {
private List m_collections;
private GeometryCursor m_current;
private int m_index;
FlatteningCollectionCursor(List collections) {
m_collections = collections;
m_index = -1;
m_current = null;
}
@Override
public Geometry next() {
while (m_collections != null) {
if (m_current != null) {
Geometry g = m_current.next();
if (g == null) {
m_current = null;
continue;
}
return g;
}
else {
m_index++;
if (m_index < m_collections.size()) {
m_current = m_collections.get(m_index).flatten().getEsriGeometryCursor();
continue;
}
else {
m_collections = null;
m_index = -1;
}
}
}
return null;
}
@Override
public int getGeometryID() {
return m_index;
}
};
//Collectively processes group of geometry collections (intersects all segments and clusters points).
//Flattens collections, removes overlaps.
//Once done, the result collections would work well for topological and relational operations.
private GeometryCursor prepare_for_ops_(OGCConcreteGeometryCollection collection) {
assert(collection != null && !collection.isEmpty());
GeometryCursor prepared = OGCStructureInternal.prepare_for_ops_(collection.flatten().getEsriGeometryCursor(), esriSR);
return removeOverlapsHelper_(toList(prepared));
}
}
