refactor: removed custom serializer definition

BREAKING CHANGE: serializer def for Failure and Diagnostics removed

src/main/java/de/hftstuttgart/ModocotBackendApplication.java

 package de.hftstuttgart;
 
-import com.fasterxml.jackson.annotation.JsonInclude;
-import com.fasterxml.jackson.core.JsonGenerator;
-import com.fasterxml.jackson.databind.JsonSerializer;
-import com.fasterxml.jackson.databind.SerializerProvider;
-import org.junit.ComparisonFailure;
-import org.junit.runner.notification.Failure;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
-import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Primary;
-import org.springframework.context.annotation.PropertySource;
-import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;
-
-import javax.tools.Diagnostic;
-import javax.tools.JavaFileObject;
-import java.io.File;
-import java.io.IOException;
-import java.net.URI;
-import java.util.Locale;
 
 @SpringBootApplication
-@PropertySource("classpath:git-credentials.properties")
 public class ModocotBackendApplication {
 
     public static void main(String[] args) {
         SpringApplication.run(ModocotBackendApplication.class, args);
     }
 
-    /**
-     * Configuration for the Jackson JSON serializer
-     */
-    @Bean
-    @Primary
-    public Jackson2ObjectMapperBuilder jacksonConfiguration() {
-        Jackson2ObjectMapperBuilder builder = new Jackson2ObjectMapperBuilder();
-        builder.indentOutput(true)
-                .serializationInclusion(JsonInclude.Include.NON_NULL) // Don’t include null values in the JSON
-                .serializerByType(Diagnostic.class, new DiagnosticSerializer())
-                .serializerByType(Failure.class, new FailureSerializer());
-        return builder;
-    }
-
-    /**
-     * Custom serializer for the {@link Diagnostic} class used by Jackson
-     */
-    private class DiagnosticSerializer extends JsonSerializer<Diagnostic> {
-        @Override
-        public void serialize(Diagnostic diagnostic, JsonGenerator gen, SerializerProvider serializerProvider) throws IOException {
-            gen.writeStartObject();
-            gen.writeStringField("code", diagnostic.getCode());
-            gen.writeNumberField("columnNumber", diagnostic.getColumnNumber());
-            gen.writeStringField("kind", diagnostic.getKind().toString());
-            gen.writeNumberField("lineNumber", diagnostic.getLineNumber());
-            gen.writeStringField("message", diagnostic.getMessage(Locale.ENGLISH));
-            gen.writeNumberField("position", diagnostic.getPosition());
-
-            URI uri = ((JavaFileObject) diagnostic.getSource()).toUri();
-            gen.writeStringField("javaFileName", new File(uri).getName());
-            gen.writeNumberField("startPosition", diagnostic.getStartPosition());
-            gen.writeNumberField("endPosition", diagnostic.getEndPosition());
-            gen.writeEndObject();
-        }
-    }
-
-    /**
-     * Custom serializer for the {@link Failure} class used by Jackson
-     */
-    private class FailureSerializer extends JsonSerializer<Failure> {
-        @Override
-        public void serialize(Failure failure, JsonGenerator gen, SerializerProvider serializerProvider) throws IOException {
-            gen.writeStartObject();
-            gen.writeStringField("testHeader", failure.getTestHeader());
-            gen.writeStringField("message", failure.getMessage());
-            gen.writeStringField("trace", failure.getTrace());
-
-            Throwable exception = failure.getException();
-            if (exception instanceof ComparisonFailure) {
-                gen.writeStringField("expected", ((ComparisonFailure) exception).getExpected());
-                gen.writeStringField("actual", ((ComparisonFailure) exception).getActual());
-            }
-            gen.writeEndObject();
-        }
-    }
 }