Improve generix parameter handling on routes

Author: ctruchi

restx-core-annotation-processor/src/main/java/restx/annotations/processor/TypeHelper.java

@@ -19,14 +19,19 @@ static String getTypeExpressionFor(String type) {
         Matcher matcher = PARAMETERIZED_TYPE_PATTERN.matcher(type);
         if (matcher.matches()) {
             String rawType = matcher.group(1);
-            List<String> pTypes = new ArrayList<>();
-            for (String pType : Splitter.on(",").trimResults().split(matcher.group(2))) {
-                pTypes.add(getTypeExpressionFor(pType));
-            }
 
-            return "Types.newParameterizedType(" + rawType + ".class, " + Joiner.on(", ").join(pTypes) + ")";
+            return "Types.newParameterizedType(" + rawType + ".class, " + getTypeExpressionFor(matcher.group(2)) + ")";
         } else {
-            return type + ".class";
+            if (type.contains(",")) {
+                List<String> pTypes = new ArrayList<>();
+                for (String pType : Splitter.on(",").trimResults().split(type)) {
+                    pTypes.add(getTypeExpressionFor(pType));
+                }
+                return Joiner.on(", ").join(pTypes);
+            } else {
+                return type + ".class";
+            }
+
         }
     }
 }

restx-core-annotation-processor/src/test/java/restx/annotations/processor/TypeHelperTest.java

@@ -1,6 +1,5 @@
 package restx.annotations.processor;
 
-import org.assertj.core.api.Assertions;
 import org.junit.Test;
 
 import static org.assertj.core.api.Assertions.assertThat;
@@ -20,5 +19,9 @@ public void should_produce_type_expression() throws Exception {
                 .isEqualTo("Types.newParameterizedType(java.util.Map.class, java.lang.String.class, java.lang.Integer.class)");
         assertThat(TypeHelper.getTypeExpressionFor("java.util.List<java.util.List<java.lang.String>>"))
                 .isEqualTo("Types.newParameterizedType(java.util.List.class, Types.newParameterizedType(java.util.List.class, java.lang.String.class))");
+        assertThat(TypeHelper.getTypeExpressionFor("java.util.List<java.util.Map<java.lang.String, java.lang.Integer>>"))
+                .isEqualTo("Types.newParameterizedType(java.util.List.class, Types.newParameterizedType(java.util.Map.class, java.lang.String.class, java.lang.Integer.class))");
+        assertThat(TypeHelper.getTypeExpressionFor("java.util.List<java.util.Map<java.util.Set<java.lang.String>, java.lang.Integer>>"))
+                .isEqualTo("Types.newParameterizedType(java.util.List.class, Types.newParameterizedType(java.util.Map.class, Types.newParameterizedType(java.util.Set.class, java.lang.String.class), java.lang.Integer.class))");
     }
 }