Geo: Add GeoJson parser to libs/geo classes (elastic#41575)

Adds GeoJson parser for Geometry classes defined in libs/geo.

Relates elastic#40908 and elastic#29872

Author: imotov

libs/geo/src/main/java/org/elasticsearch/geo/geometry/Circle.java

@@ -102,7 +102,7 @@ public int hashCode() {
     }
 
     @Override
-    public <T> T visit(GeometryVisitor<T> visitor) {
+    public <T, E extends Exception> T visit(GeometryVisitor<T, E> visitor) throws E {
         return visitor.visit(this);
     }
 

libs/geo/src/main/java/org/elasticsearch/geo/geometry/Geometry.java

@@ -26,7 +26,7 @@ public interface Geometry {
 
     ShapeType type();
 
-    <T> T visit(GeometryVisitor<T> visitor);
+    <T, E extends Exception> T visit(GeometryVisitor<T, E> visitor) throws E;
 
     boolean isEmpty();
 

libs/geo/src/main/java/org/elasticsearch/geo/geometry/GeometryCollection.java

@@ -57,7 +57,7 @@ public ShapeType type() {
     }
 
     @Override
-    public <T> T visit(GeometryVisitor<T> visitor) {
+    public <T, E extends Exception> T visit(GeometryVisitor<T, E> visitor) throws E {
         return visitor.visit(this);
     }
 

libs/geo/src/main/java/org/elasticsearch/geo/geometry/GeometryVisitor.java

@@ -44,26 +44,26 @@
  *
  * @see <a href="https://en.wikipedia.org/wiki/Visitor_pattern">Visitor Pattern</a>
  */
-public interface GeometryVisitor<T> {
+public interface GeometryVisitor<T, E extends Exception> {
 
-    T visit(Circle circle);
+    T visit(Circle circle) throws E;
 
-    T visit(GeometryCollection<?> collection);
+    T visit(GeometryCollection<?> collection) throws E;
 
-    T visit(Line line);
+    T visit(Line line) throws E;
 
-    T visit(LinearRing ring);
+    T visit(LinearRing ring) throws E;
 
-    T visit(MultiLine multiLine);
+    T visit(MultiLine multiLine) throws E;
 
-    T visit(MultiPoint multiPoint);
+    T visit(MultiPoint multiPoint) throws E;
 
-    T visit(MultiPolygon multiPolygon);
+    T visit(MultiPolygon multiPolygon) throws E;
 
-    T visit(Point point);
+    T visit(Point point) throws E;
 
-    T visit(Polygon polygon);
+    T visit(Polygon polygon) throws E;
 
-    T visit(Rectangle rectangle);
+    T visit(Rectangle rectangle) throws E;
 
 }

libs/geo/src/main/java/org/elasticsearch/geo/geometry/Line.java

@@ -103,7 +103,7 @@ public ShapeType type() {
     }
 
     @Override
-    public <T> T visit(GeometryVisitor<T> visitor) {
+    public <T, E extends Exception> T visit(GeometryVisitor<T, E> visitor) throws E {
         return visitor.visit(this);
     }
 

libs/geo/src/main/java/org/elasticsearch/geo/geometry/LinearRing.java

@@ -54,7 +54,7 @@ public ShapeType type() {
     }
 
     @Override
-    public <T> T visit(GeometryVisitor<T> visitor) {
+    public <T, E extends Exception> T visit(GeometryVisitor<T, E> visitor) throws E {
         return visitor.visit(this);
     }
 }

libs/geo/src/main/java/org/elasticsearch/geo/geometry/MultiLine.java

@@ -40,7 +40,7 @@ public ShapeType type() {
     }
 
     @Override
-    public <T> T visit(GeometryVisitor<T> visitor) {
+    public <T, E extends Exception> T visit(GeometryVisitor<T, E> visitor) throws E {
         return visitor.visit(this);
     }
 }

libs/geo/src/main/java/org/elasticsearch/geo/geometry/MultiPoint.java

@@ -40,7 +40,7 @@ public ShapeType type() {
     }
 
     @Override
-    public <T> T visit(GeometryVisitor<T> visitor) {
+    public <T, E extends Exception> T visit(GeometryVisitor<T, E> visitor) throws E {
         return visitor.visit(this);
     }
 

libs/geo/src/main/java/org/elasticsearch/geo/geometry/MultiPolygon.java

@@ -40,7 +40,7 @@ public ShapeType type() {
     }
 
     @Override
-    public <T> T visit(GeometryVisitor<T> visitor) {
+    public <T, E extends Exception> T visit(GeometryVisitor<T, E> visitor) throws E {
         return visitor.visit(this);
     }
 }

libs/geo/src/main/java/org/elasticsearch/geo/geometry/Point.java

@@ -93,7 +93,7 @@ public int hashCode() {
     }
 
     @Override
-    public <T> T visit(GeometryVisitor<T> visitor) {
+    public <T, E extends Exception> T visit(GeometryVisitor<T, E> visitor) throws E {
         return visitor.visit(this);
     }
 

libs/geo/src/main/java/org/elasticsearch/geo/geometry/Polygon.java

@@ -92,7 +92,7 @@ public LinearRing getHole(int i) {
     }
 
     @Override
-    public <T> T visit(GeometryVisitor<T> visitor) {
+    public <T, E extends Exception> T visit(GeometryVisitor<T, E> visitor) throws E {
         return visitor.visit(this);
     }
 

libs/geo/src/main/java/org/elasticsearch/geo/geometry/Rectangle.java

@@ -207,7 +207,7 @@ public int hashCode() {
     }
 
     @Override
-    public <T> T visit(GeometryVisitor<T> visitor) {
+    public <T, E extends Exception> T visit(GeometryVisitor<T, E> visitor) throws E {
         return visitor.visit(this);
     }
 

libs/geo/src/main/java/org/elasticsearch/geo/geometry/ShapeType.java

@@ -19,6 +19,8 @@
 
 package org.elasticsearch.geo.geometry;
 
+import java.util.Locale;
+
 /**
  * Shape types supported by elasticsearch
  */
@@ -33,4 +35,8 @@ public enum ShapeType {
     LINEARRING, // not serialized by itself in WKT or WKB
     ENVELOPE, // not part of the actual WKB spec
     CIRCLE; // not part of the actual WKB spec
+
+    public static ShapeType forName(String shapeName) {
+        return ShapeType.valueOf(shapeName.toUpperCase(Locale.ROOT));
+    }
 }

libs/geo/src/main/java/org/elasticsearch/geo/utils/WellKnownText.java

@@ -68,7 +68,7 @@ public static void toWKT(Geometry geometry, StringBuilder sb) {
         if (geometry.isEmpty()) {
             sb.append(EMPTY);
         } else {
-            geometry.visit(new GeometryVisitor<Void>() {
+            geometry.visit(new GeometryVisitor<Void, RuntimeException>() {
                 @Override
                 public Void visit(Circle circle) {
                     sb.append(LPAREN);
@@ -543,7 +543,7 @@ private static String nextCloserOrComma(StreamTokenizer stream) throws IOExcepti
     }
 
     public static String getWKTName(Geometry geometry) {
-        return geometry.visit(new GeometryVisitor<String>() {
+        return geometry.visit(new GeometryVisitor<String, RuntimeException>() {
             @Override
             public String visit(Circle circle) {
                 return "circle";

libs/geo/src/test/java/org/elasticsearch/geo/geometry/BaseGeometryTestCase.java

@@ -67,7 +67,7 @@ public void testVisitor() {
 
     public static void testVisitor(Geometry geom) {
         AtomicBoolean called = new AtomicBoolean(false);
-        Object result = geom.visit(new GeometryVisitor<Object>() {
+        Object result = geom.visit(new GeometryVisitor<Object, RuntimeException>() {
             private Object verify(Geometry geometry, String expectedClass) {
                 assertFalse("Visitor should be called only once", called.getAndSet(true));
                 assertSame(geom, geometry);