fix: make the new entity multipart controller confitional so it doesn…

spring-content-rest/src/main/java/org/springframework/data/rest/extensions/entitycontent/RepositoryEntityMultipartConfiguration.java

@@ -1,13 +1,14 @@
 package org.springframework.data.rest.extensions.entitycontent;
 
-import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.*;
 import org.springframework.data.rest.webmvc.config.RepositoryRestConfigurer;
 import org.springframework.http.converter.HttpMessageConverter;
+import org.springframework.core.type.AnnotatedTypeMetadata;
 
 import java.util.List;
 
 @Configuration
+@Conditional(SpringDataRestPresentCondition.class)
 public class RepositoryEntityMultipartConfiguration {
 
     @Bean
@@ -19,4 +20,5 @@ public void configureHttpMessageConverters(List<HttpMessageConverter<?>> message
             }
         };
     }
+
 }

spring-content-rest/src/main/java/org/springframework/data/rest/extensions/entitycontent/SpringDataRestPresentCondition.java

@@ -0,0 +1,18 @@
+package org.springframework.data.rest.extensions.entitycontent;
+
+import org.springframework.context.annotation.Condition;
+import org.springframework.context.annotation.ConditionContext;
+import org.springframework.core.type.AnnotatedTypeMetadata;
+
+public class SpringDataRestPresentCondition implements Condition {
+
+    @Override
+    public boolean matches(ConditionContext context, AnnotatedTypeMetadata metadata) {
+        try {
+            context.getClassLoader().loadClass("org.springframework.data.rest.webmvc.config.RepositoryRestConfigurer");
+            return true; // Spring Data REST is present
+        } catch (ClassNotFoundException e) {
+            return false; // Spring Data REST is not present
+        }
+    }
+}