added missing file

src/main/java/com/esri/core/geometry/OGCStructureInternal.java

@@ -0,0 +1,89 @@
+/*
+ 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: contracts@esri.com
+ */
+package com.esri.core.geometry;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import com.esri.core.geometry.ogc.OGCConcreteGeometryCollection;
+import com.esri.core.geometry.ogc.OGCGeometry;
+import com.esri.core.geometry.ogc.OGCGeometryCollection;
+
+//An internal helper class. Do not use.
+public class OGCStructureInternal {
+	private static class EditShapeCursor extends GeometryCursor {
+		EditShape m_shape;
+		int m_geom;
+		int m_index;
+
+		EditShapeCursor(EditShape shape, int index) {
+			m_shape = shape;
+			m_geom = -1;
+			m_index = index;
+		}
+		@Override
+		public Geometry next() {
+			if (m_shape != null) {
+				if (m_geom == -1)
+					m_geom = m_shape.getFirstGeometry();
+				else
+					m_geom = m_shape.getNextGeometry(m_geom);
+
+				if (m_geom == -1) {
+					m_shape = null;
+				}
+				else {
+					return m_shape.getGeometry(m_geom);
+				}
+
+			}
+
+			return null;
+		}
+
+		@Override
+		public int getGeometryID() {
+			return m_shape.getGeometryUserIndex(m_geom, m_index);
+		}
+
+	};
+
+	public static GeometryCursor prepare_for_ops_(GeometryCursor geoms, SpatialReference sr) {
+		assert(geoms != null);
+		EditShape editShape = new EditShape();
+		int geomIndex = editShape.createGeometryUserIndex();
+		for (Geometry g = geoms.next(); g != null; g = geoms.next()) {
+			int egeom = editShape.addGeometry(g);
+			editShape.setGeometryUserIndex(egeom, geomIndex, geoms.getGeometryID());
+		}
+
+		Envelope2D env = editShape.getEnvelope2D();
+		double tolerance = InternalUtils.calculateToleranceFromGeometry(sr,
+				env, true);
+
+		CrackAndCluster.execute(editShape, tolerance, null, true);
+		return OperatorSimplifyOGC.local().execute(new EditShapeCursor(editShape, geomIndex), sr, false, null);
+	}
+}
+