Merge pull request #319 from fabian-maysen/addMaxVertices

Ability to pass the number of vertices in the execute method of OperatorBuffer.

Author: stolstov

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

@@ -81,7 +81,7 @@ public abstract Geometry execute(Geometry inputGeometry,
     *Note that max_deviation can be exceeded because geometry is generalized with 0.25 * real_deviation, also input segments closer than 0.25 * real_deviation are 
     *snapped to a point.
     */
-    abstract GeometryCursor execute(GeometryCursor input_geometries, SpatialReference sr, double[] distances, double max_deviation, int max_vertices_in_full_circle, boolean b_union, ProgressTracker progress_tracker);
+    public abstract GeometryCursor execute(GeometryCursor input_geometries, SpatialReference sr, double[] distances, double max_deviation, int max_vertices_in_full_circle, boolean b_union, ProgressTracker progress_tracker);
 
 	public static OperatorBuffer local() {
 		return (OperatorBuffer) OperatorFactoryLocal.getInstance().getOperator(

src/main/java/com/esri/core/geometry/ogc/OGCGeometry.java

@@ -466,6 +466,21 @@ public OGCGeometry buffer(double distance) {
 		return OGCGeometry.createFromEsriGeometry(cursor.next(), esriSR);
 	}
 
+	public OGCGeometry buffer(double distance, int max_vertices_in_full_circle, double max_deviation) {
+		OperatorBuffer op = (OperatorBuffer) OperatorFactoryLocal.getInstance()
+				.getOperator(Operator.Type.Buffer);
+		if (distance == 0) {// when distance is 0, return self (maybe we should
+			// create a copy instead).
+			return this;
+		}
+
+		double d[] = { distance };
+		com.esri.core.geometry.GeometryCursor cursor = op.execute(
+				getEsriGeometryCursor(), getEsriSpatialReference(), d, max_deviation, max_vertices_in_full_circle, true,
+				null);
+		return OGCGeometry.createFromEsriGeometry(cursor.next(), esriSR);
+	}
+
 	public OGCGeometry centroid() {
 		OperatorCentroid2D op = (OperatorCentroid2D) OperatorFactoryLocal.getInstance()
 				.getOperator(Operator.Type.Centroid2D);