Support for Groovy 4. Fixes springdoc#1779

Author: bnasslahsen

springdoc-openapi-groovy/pom.xml

@@ -17,6 +17,7 @@
 		<dependency>
 			<groupId>org.codehaus.groovy</groupId>
 			<artifactId>groovy</artifactId>
+			<optional>true</optional>
 		</dependency>
 		<dependency>
 			<groupId>org.springdoc</groupId>

springdoc-openapi-groovy/src/main/java/org/springdoc/groovy/SpringDocGroovyConfiguration.java

@@ -29,6 +29,7 @@
 import org.springdoc.core.providers.ObjectMapperProvider;
 
 import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
@@ -43,6 +44,7 @@
 @Lazy(false)
 @Configuration(proxyBeanMethods = false)
 @ConditionalOnProperty(name = SPRINGDOC_ENABLED, matchIfMissing = true)
+@ConditionalOnClass(MetaClass.class)
 @ConditionalOnBean(SpringDocConfiguration.class)
 public class SpringDocGroovyConfiguration {