Use newly introduced lambdas in Spring's API template to avoid generating uncompilable example code

Author: smasset

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

@@ -5,6 +5,8 @@
 import io.swagger.codegen.*;
 import io.swagger.codegen.languages.features.BeanValidationFeatures;
 import io.swagger.codegen.languages.features.OptionalFeatures;
+import io.swagger.codegen.mustache.SplitStringLambda;
+import io.swagger.codegen.mustache.TrimWhitespaceLambda;
 import io.swagger.models.Operation;
 import io.swagger.models.Path;
 import io.swagger.models.Swagger;
@@ -340,6 +342,10 @@ public void execute(Template.Fragment fragment, Writer writer) throws IOExceptio
                 writer.write(fragment.execute().replaceAll("\\r|\\n", ""));
             }
         });
+
+        additionalProperties.put("lambdaTrimWhitespace", new TrimWhitespaceLambda());
+
+        additionalProperties.put("lambdaSplitString", new SplitStringLambda());
     }
 
     @Override

modules/swagger-codegen/src/main/resources/JavaSpring/api.mustache

@@ -113,7 +113,7 @@ public interface {{classname}} {
         {{#examples}}
             if (getAcceptHeader().get().contains("{{{contentType}}}")) {
                 try {
-                    String exampleString = "{{#lambdaRemoveLineBreak}}{{#lambdaEscapeDoubleQuote}}{{{example}}}{{/lambdaEscapeDoubleQuote}}{{/lambdaRemoveLineBreak}}";
+                    String exampleString = {{#lambdaSplitString}}{{#lambdaRemoveLineBreak}}{{#lambdaEscapeDoubleQuote}}{{#lambdaTrimWhitespace}}{{{example}}}{{/lambdaTrimWhitespace}}{{/lambdaEscapeDoubleQuote}}{{/lambdaRemoveLineBreak}}{{/lambdaSplitString}};
                     return {{#async}}CompletableFuture.completedFuture({{/async}}new ResponseEntity<>(getObjectMapper().get().readValue(exampleString, {{>exampleReturnTypes}}.class), HttpStatus.NOT_IMPLEMENTED){{#async}}){{/async}};
                 } catch (IOException e) {
                     log.error("Couldn't serialize response for content type {{{contentType}}}", e);
@@ -133,4 +133,4 @@ public interface {{classname}} {
 
 {{/operation}}
 }
-{{/operations}}
+{{/operations}}