make sure to camelize properly before checking for reserved words (#4302)

modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/Swift3Codegen.java

@@ -518,24 +518,32 @@ public class Swift3Codegen extends DefaultCodegen implements CodegenConfig {
             return camelize(WordUtils.capitalizeFully(getSymbolName(name).toUpperCase()), true);
         }
 
+	// Camelize only when we have a structure defined below
+	Boolean camelized = false;
+	if (name.matches("[A-Z][a-z0-9]+[a-zA-Z0-9]*")) {
+	    name = camelize(name, true);
+	    camelized = true;
+	}
+
         // Reserved Name
         if (isReservedWord(name)) {
             return escapeReservedWord(name);
         }
 
+	// Check for numerical conversions
         if ("Int".equals(datatype) || "Int32".equals(datatype) || "Int64".equals(datatype) ||
                 "Float".equals(datatype) || "Double".equals(datatype)) {
             String varName = "number" + camelize(name);
             varName = varName.replaceAll("-", "minus");
             varName = varName.replaceAll("\\+", "plus");
             varName = varName.replaceAll("\\.", "dot");
-
             return varName;
         }
 
-        // Prevent from breaking properly cased identifier
-        if (name.matches("[A-Z][a-z0-9]+[a-zA-Z0-9]*")) {
-            return camelize(name, true);
+	// If we have already camelized the word, don't progress
+	// any further
+	if (camelized) {
+	    return name;
 	}
 
         char[] separators = {'-', '_', ' ', ':', '(', ')'};

modules/swagger-codegen/src/test/java/io/swagger/codegen/swift3/Swift3CodegenTest.java

@@ -13,6 +13,16 @@ public class Swift3CodegenTest {
 
     Swift3Codegen swiftCodegen = new Swift3Codegen();
 
+    @Test
+    public void testReservedWord() throws Exception {
+	Assert.assertEquals(swiftCodegen.toEnumVarName("Public", null), "_public");
+    }
+
+    @Test
+    public void shouldNotBreakNonReservedWord() throws Exception {
+	Assert.assertEquals(swiftCodegen.toEnumVarName("Error", null), "error");
+    }
+
     @Test
     public void shouldNotBreakCorrectName() throws Exception {
         Assert.assertEquals(swiftCodegen.toEnumVarName("EntryName", null), "entryName");