[julia] improve enum support (#20016)

* [julia] improve enum support

Improved enum support. Added an override for `postProcessModels` method in julia code generator to do enum post processing. Added an override for `toEnumValue` method in julia code generator to generate enum values correctly based on julia types. Updated templates to use `#enumVars` for generating enum values.

* generated samples

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractJuliaCodegen.java

@@ -25,6 +25,7 @@ import org.openapitools.codegen.meta.features.ParameterFeature;
 import org.openapitools.codegen.meta.features.SchemaSupportFeature;
 import org.openapitools.codegen.meta.features.SecurityFeature;
 import org.openapitools.codegen.meta.features.WireFormatFeature;
+import org.openapitools.codegen.model.ModelsMap;
 
 import java.io.File;
 import java.text.SimpleDateFormat;
@@ -70,6 +71,25 @@ public abstract class AbstractJuliaCodegen extends DefaultCodegen {
     protected final DateTimeFormatter OFFSET_DATE_TIME_FORMAT = DateTimeFormatter.ISO_OFFSET_DATE_TIME;
     protected final SimpleDateFormat DATE_TIME_FORMAT = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSXXX", Locale.ROOT);
     protected final SimpleDateFormat DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd", Locale.ROOT);
+    protected final List<String> UNQUOTED_DATATYPES = Arrays.asList(
+        "int",
+        "integer",
+        "long",
+        "short",
+        "byte",
+        "float",
+        "double",
+        "number",
+        "decimal",
+        "boolean",
+        "Int64",
+        "Int32",
+        "UInt8",
+        "Float32",
+        "Float64",
+        "Bool"
+    );
+
 
     public AbstractJuliaCodegen() {
         super();
@@ -549,4 +569,28 @@ public abstract class AbstractJuliaCodegen extends DefaultCodegen {
         return super.addMustacheLambdas()
                 .put("escapeDollar", new EscapeChar("(?<!\\\\)\\$", "\\\\\\$"));
     }
+
+    // override with any special post-processing
+    @Override
+    @SuppressWarnings("static-method")
+    public ModelsMap postProcessModels(ModelsMap objs) {
+        objs = super.postProcessModels(objs);
+        return postProcessModelsEnum(objs);
+    }
+
+    /**
+     * Return the enum value in the language specified format
+     * e.g. status becomes "status"
+     *
+     * @param value    enum variable name
+     * @param datatype data type
+     * @return the sanitized value for enum
+     */
+    public String toEnumValue(String value, String datatype) {
+        if (datatype != null && UNQUOTED_DATATYPES.contains(datatype)) {
+            return value;
+        } else {
+            return "\"" + escapeText(value) + "\"";
+        }
+    }
 }

modules/openapi-generator/src/main/resources/julia-client/partial_model_single.mustache

@@ -38,11 +38,11 @@ end
 
 function OpenAPI.validate_property(::Type{ {{classname}} }, name::Symbol, val)
 {{#allVars}}
-{{#isEnum}}
+{{#isEnum}}{{#allowableValues}}
     if name === Symbol("{{#lambda.escapeDollar}}{{baseName}}{{/lambda.escapeDollar}}")
-        OpenAPI.validate_param(name, "{{classname}}", :enum, val, [{{#_enum}}{{#isString}}"{{.}}"{{/isString}}{{^isString}}{{.}}{{/isString}}{{^-last}}, {{/-last}}{{/_enum}}])
+        OpenAPI.validate_param(name, "{{classname}}", :enum, val, [{{#enumVars}}{{{value}}}{{^-last}}, {{/-last}}{{/enumVars}}])
     end
-{{/isEnum}}
+{{/allowableValues}}{{/isEnum}}
 {{^isEnum}}
 {{#format}}
     if name === Symbol("{{#lambda.escapeDollar}}{{baseName}}{{/lambda.escapeDollar}}")

modules/openapi-generator/src/main/resources/julia-server/partial_model_single.mustache

@@ -38,11 +38,11 @@ end
 
 function OpenAPI.validate_property(::Type{ {{classname}} }, name::Symbol, val)
 {{#allVars}}
-{{#isEnum}}
+{{#isEnum}}{{#allowableValues}}
     if name === Symbol("{{#lambda.escapeDollar}}{{baseName}}{{/lambda.escapeDollar}}")
-        OpenAPI.validate_param(name, "{{classname}}", :enum, val, [{{#_enum}}{{#isString}}"{{.}}"{{/isString}}{{^isString}}{{.}}{{/isString}}{{^-last}}, {{/-last}}{{/_enum}}])
+        OpenAPI.validate_param(name, "{{classname}}", :enum, val, [{{#enumVars}}{{{value}}}{{^-last}}, {{/-last}}{{/enumVars}}])
     end
-{{/isEnum}}
+{{/allowableValues}}{{/isEnum}}
 {{^isEnum}}
 {{#format}}
     if name === Symbol("{{#lambda.escapeDollar}}{{baseName}}{{/lambda.escapeDollar}}")