Provide default identifierSpace and schemaSpace for reconciliation services. Closes #1936.

main/src/com/google/refine/model/recon/StandardReconConfig.java

@@ -75,6 +75,9 @@ import com.google.refine.util.ParsingUtilities;
 public class StandardReconConfig extends ReconConfig {
     final static Logger logger = LoggerFactory.getLogger("refine-standard-recon");
     
+	private static final String DEFAULT_SCHEMA_SPACE = "http://localhost/schema";
+	private static final String DEFAULT_IDENTIFIER_SPACE = "http://localhost/identifier";
+    
     static public class ColumnDetail  {
         @JsonProperty("column")
         final public String columnName;
@@ -208,8 +211,8 @@ public class StandardReconConfig extends ReconConfig {
         int limit
     ) {
         this.service = service;
-        this.identifierSpace = identifierSpace;
+        this.identifierSpace = identifierSpace != null ? identifierSpace : DEFAULT_IDENTIFIER_SPACE;
-        this.schemaSpace = schemaSpace;
+        this.schemaSpace = schemaSpace != null ? schemaSpace : DEFAULT_SCHEMA_SPACE;
         
         this.typeID = typeID;
         this.typeName = typeName;

main/tests/server/src/com/google/refine/tests/model/recon/StandardReconConfigTests.java

@@ -154,6 +154,19 @@ public class StandardReconConfigTests extends RefineTest {
     	assertNull(config.typeName);
     }
     
+    @Test
+    public void testReconstructNoIdentifierSchemaSpaces() throws IOException {
+    	String json = "{\"mode\":\"standard-service\","
+    			+ "\"service\":\"https://tools.wmflabs.org/openrefine-wikidata/en/api\","
+    			+ "\"type\":null,"
+    			+ "\"autoMatch\":true,"
+    			+ "\"columnDetails\":[],"
+    			+ "\"limit\":0}";
+    	StandardReconConfig config = StandardReconConfig.reconstruct(json);
+    	assertEquals(config.identifierSpace, "http://localhost/identifier");
+    	assertEquals(config.schemaSpace, "http://localhost/schema");
+    }
+    
     @Test
     public void formulateQueryTest() throws IOException {
     	Project project = createCSVProject("title,director\n"