fix(crystal): class name should be in PascalCase

Fix:
-  class EnumAttributeValidatorFor_type < EnumAttributeValidator
+  class EnumAttributeValidatorForType < EnumAttributeValidator

Author: n-rodriguez

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

@@ -29,8 +29,7 @@
 import org.openapitools.codegen.model.OperationMap;
 import org.openapitools.codegen.model.OperationsMap;
 import org.openapitools.codegen.templating.mustache.PrefixWithHashLambda;
-import org.openapitools.codegen.templating.mustache.UppercaseLambda;
-import org.openapitools.codegen.templating.mustache.TitlecaseLambda;
+import org.openapitools.codegen.templating.mustache.PascalCaseLambda;
 import org.openapitools.codegen.utils.ModelUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -305,8 +304,7 @@ public void processOpts() {
 
         // add lambda for mustache templates
         additionalProperties.put("lambdaPrefixWithHash", new PrefixWithHashLambda());
-        additionalProperties.put("lambdaUppercase", new UppercaseLambda());
-        additionalProperties.put("lambdaTitlecase", new TitlecaseLambda());
+        additionalProperties.put("lambdaPascalcase", new PascalCaseLambda());
     }
 
     @Override

modules/openapi-generator/src/main/java/org/openapitools/codegen/templating/mustache/PascalCaseLambda.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright 2018 OpenAPI-Generator Contributors (https://openapi-generator.tech)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openapitools.codegen.templating.mustache;
+
+import com.samskivert.mustache.Mustache;
+import com.samskivert.mustache.Template;
+import org.openapitools.codegen.utils.CamelizeOption;
+
+import java.io.IOException;
+import java.io.Writer;
+
+import static org.openapitools.codegen.utils.StringUtils.camelize;
+
+/**
+ * Converts text in a fragment to PascalCase.
+ * <p>
+ * Register:
+ * <pre>
+ * additionalProperties.put("pascalcase", new PascalCaseLambda());
+ * </pre>
+ * <p>
+ * Use:
+ * <pre>
+ * {{#pascalcase}}{{name}}{{/pascalcase}}
+ * </pre>
+ */
+public class PascalCaseLambda implements Mustache.Lambda {
+    public PascalCaseLambda() {
+    }
+
+    @Override
+    public void execute(Template.Fragment fragment, Writer writer) throws IOException {
+        String text = fragment.execute();
+        text = camelize(text);
+        writer.write(text);
+    }
+}

modules/openapi-generator/src/main/resources/crystal/partial_model_generic.mustache

@@ -56,7 +56,7 @@
     {{#vars}}
     {{#isEnum}}
     {{^isContainer}}
-    class EnumAttributeValidatorFor{{#lambdaTitlecase}}{{{name}}}{{/lambdaTitlecase}} < EnumAttributeValidator
+    class EnumAttributeValidatorFor{{#lambdaPascalcase}}{{{name}}}{{/lambdaPascalcase}} < EnumAttributeValidator
       @attribute : String
       @allowable_values : Array(Int32 | Int64 | Float32 | Float64 | String)
 
@@ -118,7 +118,7 @@
       {{#vars}}
       {{#isEnum}}
       {{^isContainer}}
-      {{{name}}}_validator = EnumAttributeValidatorFor{{#lambdaTitlecase}}{{{name}}}{{/lambdaTitlecase}}.new
+      {{{name}}}_validator = EnumAttributeValidatorFor{{#lambdaPascalcase}}{{{name}}}{{/lambdaPascalcase}}.new
       if !{{{name}}}_validator.valid?(@{{{name}}})
         message = {{{name}}}_validator.message
         invalid_properties.push(message)
@@ -181,7 +181,7 @@
       {{#vars}}
       {{#isEnum}}
       {{^isContainer}}
-      {{{name}}}_validator = EnumAttributeValidatorFor{{#lambdaTitlecase}}{{{name}}}{{/lambdaTitlecase}}.new
+      {{{name}}}_validator = EnumAttributeValidatorFor{{#lambdaPascalcase}}{{{name}}}{{/lambdaPascalcase}}.new
       return false unless {{{name}}}_validator.valid?(@{{{name}}})
       {{/isContainer}}
       {{/isEnum}}
@@ -234,7 +234,7 @@
     # Custom attribute writer method checking allowed values (enum).
     # @param [Object] {{{name}}} Object to be assigned
     def {{{name}}}=({{{name}}})
-      validator = EnumAttributeValidatorFor{{#lambdaTitlecase}}{{{name}}}{{/lambdaTitlecase}}.new
+      validator = EnumAttributeValidatorFor{{#lambdaPascalcase}}{{{name}}}{{/lambdaPascalcase}}.new
       unless validator.valid?({{{name}}})
         raise ArgumentError.new(validator.message)
       end