Add support for one-of operation

Author: maria77102

rosetta-interpreter/src/main/java/com/regnosys/rosetta/interpreternew/visitors/RosettaInterpreterRosettaConstructorExpressionInterpreter.java

@@ -27,6 +27,7 @@
 import com.regnosys.rosetta.rosetta.expression.Necessity;
 import com.regnosys.rosetta.rosetta.expression.RosettaConstructorExpression;
 import com.regnosys.rosetta.rosetta.expression.impl.ChoiceOperationImpl;
+import com.regnosys.rosetta.rosetta.expression.impl.OneOfOperationImpl;
 import com.regnosys.rosetta.rosetta.RosettaCardinality;
 import com.regnosys.rosetta.rosetta.interpreter.RosettaInterpreterValue;
 import com.regnosys.rosetta.rosetta.simple.Attribute;
@@ -202,6 +203,18 @@ private String verifyConditions(List<Condition> conditions, List<RosettaInterpre
 
 				return verifyChoiceOperation(choice.getNecessity(), choiceAttributesName, attr);
 			}
+			if (c.getExpression().getClass().equals(OneOfOperationImpl.class)) {
+				List<String> allAttributesNames = attr.stream()
+						.map(RosettaInterpreterTypedFeatureValue::getName)
+						.collect(Collectors.toList());
+				
+				int nonEmptyCount = countPresentAttributes(allAttributesNames, attr);
+				if (nonEmptyCount != 1) {
+					return "One-of condition not followed. "
+							+ "Exactly one attribute should be defined.";
+				}
+				
+			}
 		}
 
 		//if no errors up until this point, return null

rosetta-interpreter/src/test/java/com/regnosys/rosetta/interpreternew/RosettaInterpreterConstructorExpressionTest.java

@@ -399,4 +399,52 @@ public void testDataTypeChoiceThreeDots() {
 
 		assertEquals("Ob", result.getName());
 	}
+	
+	@Test
+	public void testDataTypeOneOfGood() {
+		RosettaModel model = modelHelper.parseRosetta("type Ob:"
+				+ "one int (0..1) two int (0..*)"
+				+ "condition: one-of "
+				+ "func M: output: result Ob (1..1) set result: Ob { one: 1 }");
+		
+		RosettaConstructorExpressionImpl constructor = ((RosettaConstructorExpressionImpl) ((
+				FunctionImpl) model.getElements().get(1)).getOperations().get(0).getExpression());
+		RosettaInterpreterTypedValue result = (RosettaInterpreterTypedValue) interpreter.interp(constructor);
+		
+		assertEquals("Ob", result.getName());
+	}
+	
+	@Test
+	public void testDataTypeOneOfBad() {
+		RosettaModel model = modelHelper.parseRosetta("type Ob:"
+				+ "one int (0..1) two int (0..*)"
+				+ "condition: one-of "
+				+ "func M: output: result Ob (1..1) set result: Ob { ... }");
+		
+		RosettaConstructorExpressionImpl constructor = ((RosettaConstructorExpressionImpl) ((
+				FunctionImpl) model.getElements().get(1)).getOperations().get(0).getExpression());
+		RosettaInterpreterValue result = interpreter.interp(constructor);
+		
+		RosettaInterpreterErrorValue expected = new RosettaInterpreterErrorValue(new RosettaInterpreterError(
+				"One-of condition not followed. Exactly one attribute should be defined."));
+	
+		assertEquals(expected, result);
+	}
+	
+	@Test
+	public void testDataTypeOneOfNonOptional() {
+		RosettaModel model = modelHelper.parseRosetta("type Ob:"
+				+ "one int (0..1) two int (0..*) three int (1..1) four int (1..*)"
+				+ "condition: one-of "
+				+ "func M: output: result Ob (1..1) set result: Ob { three: 3, four: [4,5] }");
+		
+		RosettaConstructorExpressionImpl constructor = ((RosettaConstructorExpressionImpl) ((
+				FunctionImpl) model.getElements().get(1)).getOperations().get(0).getExpression());
+		RosettaInterpreterValue result = interpreter.interp(constructor);
+		
+		RosettaInterpreterErrorValue expected = new RosettaInterpreterErrorValue(new RosettaInterpreterError(
+				"One-of condition not followed. Exactly one attribute should be defined."));
+	
+		assertEquals(expected, result);
+	}
 }