Added Reposiotories post processor

Author: mipo256

spring-data-jdbc-ydb/src/main/java/tech/ydb/data/repository/config/JdbcRepositoryBeanPostProcessor.java

@@ -0,0 +1,37 @@
+package tech.ydb.data.repository.config;
+
+import org.springframework.beans.BeansException;
+import org.springframework.beans.factory.config.BeanPostProcessor;
+import org.springframework.core.annotation.AnnotationUtils;
+import org.springframework.data.jdbc.repository.support.JdbcRepositoryFactoryBean;
+import org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport;
+import org.springframework.stereotype.Component;
+
+import tech.ydb.data.repository.ViewIndex;
+
+/**
+ * Enabling the exposure of the metadata for the {@link JdbcRepositoryFactoryBean}. Enables
+ * only for those {@link RepositoryFactoryBeanSupport factory beans} that have any {@link ViewIndex}
+ * annotated methods.
+ *
+ * @author Mikhail Polivakha
+ */
+@Component
+@SuppressWarnings("rawtypes")
+public class JdbcRepositoryBeanPostProcessor implements BeanPostProcessor {
+
+    @Override
+    public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
+        if (bean instanceof JdbcRepositoryFactoryBean rfbs && hasAnyViewIndexMethods(rfbs)) {
+            rfbs.setExposeMetadata(true);
+        }
+        return bean;
+    }
+
+    private static boolean hasAnyViewIndexMethods(JdbcRepositoryFactoryBean rfbs) {
+        return rfbs.getRepositoryInformation()
+          .getQueryMethods()
+          .stream()
+          .anyMatch(method -> AnnotationUtils.getAnnotation(method, ViewIndex.class) != null);
+    }
+}