restored accidental file deletion

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

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+/*
+ * 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 camelCase.
+  *
+  * Register:
+  * <pre>
+  * additionalProperties.put("camelcase", new CamelCaseLambda());
+  * </pre>
+  *
+  * Use:
+  * <pre>
+  * {{#camelcase}}{{name}}{{/camelcase}}
+  * </pre>
+  */
+ public class CamelCaseLambda implements Mustache.Lambda {
+     public CamelCaseLambda() {
+     }
+
+     @Override
+     public void execute(Template.Fragment fragment, Writer writer) throws IOException {
+         String text = fragment.execute();
+         text = camelize(text, CamelizeOption.LOWERCASE_FIRST_CHAR);
+         writer.write(text);
+     }
+ }