change CrsParameter, Extension, Projection to Serializable and fix bug when cache ProjectedCoordinateReferenceSystem

(cherry picked from commit 263e0f0)

Author: billtian

geom/src/main/java/org/geolatte/geom/crs/CrsParameter.java

@@ -21,6 +21,7 @@
 
 package org.geolatte.geom.crs;
 
+import java.io.Serializable;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -31,7 +32,9 @@
  * @author Karel Maesen, Geovise BVBA
  *         creation-date: 8/2/11
  */
-public class CrsParameter {
+public class CrsParameter implements Serializable {
+
+    private static final long serialVersionUID = 6884205871950410216L;
 
     private final String name;
     private final double value;

geom/src/main/java/org/geolatte/geom/crs/Extension.java

@@ -1,9 +1,13 @@
 package org.geolatte.geom.crs;
 
+import java.io.Serializable;
+
 /**
  * Created by Karel Maesen, Geovise BVBA on 23/04/16.
  */
-public class Extension {
+public class Extension implements Serializable {
+
+    private static final long serialVersionUID = 6884205871950410216L;
 
     private final String name;
     private final String value;

geom/src/main/java/org/geolatte/geom/crs/Projection.java

@@ -21,13 +21,17 @@
 
 package org.geolatte.geom.crs;
 
+import java.io.Serializable;
+
 /**
  * A projection from geographic coordinates to projected coordinates in a Cartesian plan.
  *
  * @author Karel Maesen, Geovise BVBA
  *         creation-date: 8/2/11
  */
-public class Projection {
+public class Projection implements Serializable {
+
+    private static final long serialVersionUID = 6884205871950410216L;
 
     public final static Projection UNKNOWN = new Projection(CrsId.UNDEFINED, "unknown");
 

geom/src/test/java/org/geolatte/geom/crs/SerializableTest.java

@@ -6,8 +6,6 @@
 
 import java.io.*;
 import java.nio.file.Files;
-import java.nio.file.Path;
-import java.nio.file.Paths;
 
 import static org.junit.Assert.assertEquals;
 
@@ -35,5 +33,24 @@ public void testCastToSerializable() throws IOException, ClassNotFoundException
 
     }
 
+    @Test
+    public void testProjectedCrsCastToSerializable() throws IOException, ClassNotFoundException {
+        ProjectedCoordinateReferenceSystem crs = CoordinateReferenceSystems.WEB_MERCATOR;
+
+        Serializable ser = (Serializable) crs;
+        File tempFile = Files.createTempFile("pcrs", ".ser").toFile();
+        tempFile.deleteOnExit();
+        try (ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(tempFile))){
+            out.writeObject(crs);
+        };
+
+        ProjectedCoordinateReferenceSystem deser;
+        try (ObjectInputStream ins = new ObjectInputStream(new FileInputStream(tempFile))) {
+            deser = (ProjectedCoordinateReferenceSystem) ins.readObject();
+        }
+
+        assertEquals(crs, deser);
+
+    }
 
 }