Add QuerydslWebFluxConfiguration

Author: Ubuntu

Diff for: src/main/java/org/springframework/data/webflux/config/QuerydslWebFluxConfiguration.java

@@ -0,0 +1,78 @@
+/*
+ * Copyright 2015-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.webflux.config;
+
+import java.util.Optional;
+
+import org.springframework.beans.factory.BeanFactory;
+import org.springframework.beans.factory.ObjectFactory;
+import org.springframework.beans.factory.ObjectProvider;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Lazy;
+import org.springframework.core.convert.ConversionService;
+import org.springframework.data.querydsl.EntityPathResolver;
+import org.springframework.data.querydsl.SimpleEntityPathResolver;
+import org.springframework.data.querydsl.binding.QuerydslBindingsFactory;
+import org.springframework.data.webflux.querydsl.QuerydslPredicateArgumentResolver;
+import org.springframework.web.reactive.config.WebFluxConfigurer;
+import org.springframework.web.reactive.result.method.annotation.ArgumentResolverConfigurer;
+
+/**
+ * Querydsl-specific web configuration for Spring Data. Registers a {@link HandlerMethodArgumentResolver} that builds up
+ * {@link Predicate}s from web requests.
+ *
+ * @author Oliver Gierke
+ * @author Mark Paluch
+ * @author Matías Hermosilla
+ * @since 1.11
+ * @soundtrack Anika Nilles - Alter Ego
+ */
+@Configuration(proxyBeanMethods = false)
+public class QuerydslWebFluxConfiguration implements WebFluxConfigurer {
+    
+    @Autowired @Qualifier("webFluxConversionService") ObjectFactory<ConversionService> conversionService;
+	@Autowired ObjectProvider<EntityPathResolver> resolver;
+	@Autowired BeanFactory beanFactory;
+
+    /**
+	 * Default {@link QuerydslPredicateArgumentResolver} to create Querydsl {@link Predicate} instances for Spring MVC
+	 * controller methods.
+	 *
+	 * @return
+	 */
+    @Lazy
+	@Bean
+	public QuerydslPredicateArgumentResolver querydslPredicateArgumentResolver() {
+		return new QuerydslPredicateArgumentResolver(
+				beanFactory.getBean("querydslBindingsFactory", QuerydslBindingsFactory.class),
+				Optional.of(conversionService.getObject()));
+    }
+    
+    @Lazy
+	@Bean
+	public QuerydslBindingsFactory querydslBindingsFactory() {
+		return new QuerydslBindingsFactory(resolver.getIfUnique(() -> SimpleEntityPathResolver.INSTANCE));
+	}
+
+    @Override
+    public void configureArgumentResolvers(ArgumentResolverConfigurer configurer) {
+        configurer.addCustomResolver(beanFactory.getBean("querydslPredicateArgumentResolver", QuerydslPredicateArgumentResolver.class));
+    }
+
+}