feat: allow rpc calls

README.md

@@ -402,6 +402,78 @@ public class UserService {
 
 > Bulk Operations are allowed on  `Post` ,`Patch`, `Delete` and `Upsert`
 
+#### Rpc Calls 
+
+Supports of [rpc function calls](https://postgrest.org/en/v12/references/api/functions.html#functions-as-rpc)
+
+**Configuration**
+Its use a PostgrestRpcClient which use the PostgrestClient
+
+```java
+import com.fasterxml.jackson.databind.ObjectMapper;
+import fr.ouestfrance.querydsl.postgrest.PostgrestClient;
+import fr.ouestfrance.querydsl.postgrest.PostgrestWebClient;
+import fr.ouestfrance.querydsl.postgrest.PostgrestRpcClient;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.reactive.function.client.WebClient;
+
+@Configuration
+public class PostgrestConfiguration {
+
+    @Bean
+    public PostgrestRpcClient rpcClient() {
+        String serviceUrl = "http://localhost:9000";
+        WebClient webclient = WebClient.builder()
+                .baseUrl(serviceUrl)
+                // Here you can add any filters or default configuration you want
+                .build();
+
+        return new PostgrestRpcClient(PostgrestWebClient.of(webclient));
+    }
+}
+```
+
+then you can call your rpc method using this call 
+
+```java
+public class Example{
+    private PostgrestRpcClient rpcClient;
+
+    public List<Coordinate> getCoordinates(){
+        // call getCoordinates_v1 and expect to return a list of Coordinates
+        return rpcClient.exectureRpc("getCoordinates_v1", TypeUtils.parameterize(List.class, Coordinate.class));
+        // CALL => ${base_url}/rpc/getCoordinates_v1
+    }
+
+    public Coordinate getCoordinate(Point point){
+        // call findClosestCoordinate_v1 with body {x:?, y:?} 
+        // expect to return a single coordinate
+        return rpcClient.executeRpc("findClosestCoordinate_v1", point, Coordinate.class);
+        // CALL => ${base_url}/rpc/findClosestCoordinate_v1
+        // => with body {x: point.x, y: point.y}
+    }
+
+    public SimpleCoordinate getCoordinateX(Point point){
+        // call findClosestCoordinate_v1 with body {x:?, y:?}
+        // add Criteria that add select=x,y and z=gte.0.0
+        // and return the result as a SimpleCoordinate class
+        return rpcClient.executeRpc("findClosestCoordinate_v1", new CoordinateCriteria(0.0), point, SimpleCoordinate.class);
+        // CALL => ${base_url}/rpc/findClosestCoordinate_v1?z=gte.0.0&select=x,y
+        // => with body {x: point.x, y: point.y}
+    }
+
+
+    @Select({"x", "y"})
+    record CoordinateCriteria(
+            @FilterField(key = "z", operation = FilterOperation.GTE.class)
+            private Float z
+    ){}
+
+    record SimpleCoordinate(Float x, Float y){}
+}
+```
+
 ## Need Help ?
 
 If you need help with the library please start a new thread QA / Issue on github

querydsl-postgrest-resttemplate-adapter/src/main/java/fr/ouestfrance/querydsl/postgrest/PostgrestRestTemplate.java

@@ -6,6 +6,7 @@
 import fr.ouestfrance.querydsl.postgrest.model.RangeResponse;
 import lombok.AccessLevel;
 import lombok.RequiredArgsConstructor;
+import org.springframework.core.ParameterizedTypeReference;
 import org.springframework.http.HttpEntity;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpMethod;
@@ -15,6 +16,7 @@
 import org.springframework.web.client.RestTemplate;
 import org.springframework.web.util.UriComponentsBuilder;
 
+import java.lang.reflect.Type;
 import java.net.URI;
 import java.util.List;
 import java.util.Map;
@@ -66,7 +68,7 @@ public <T> RangeResponse<T> search(String resource, Map<String, List<String>> pa
     }
 
     @Override
-    public <T> BulkResponse<T> post(String resource, Map<String, List<String>> params, List<Object> value, Map<String, List<String>> headers, Class<T> clazz) {
+    public <T> BulkResponse<T> post(String resource, Map<String, List<String>> params, Object value, Map<String, List<String>> headers, Class<T> clazz) {
         ResponseEntity<List<T>> response = restTemplate.exchange(
                 getUri(resource, params),
                 HttpMethod.POST, new HttpEntity<>(value, toHeaders(headers)), listRef(clazz));
@@ -95,6 +97,12 @@ public List<CountItem> count(String resource, Map<String, List<String>> map) {
                 getUri(resource, map), HttpMethod.GET, new HttpEntity<>(null, new HttpHeaders()), listRef(CountItem.class)).getBody();
     }
 
+    @Override
+    public <V> V rpc(String rpcName, Map<String, List<String>> map, Object body, Type type) {
+        return (V) restTemplate.exchange(
+                getUri(rpcName, map), HttpMethod.POST, new HttpEntity<>(body, new HttpHeaders()), ParameterizedTypeReference.forType(type)).getBody();
+    }
+
 
     /**
      * Convert map to MultiValueMap

querydsl-postgrest-resttemplate-adapter/src/test/java/fr/ouestfrance/querydsl/postgrest/PostgrestRestTemplateRepositoryTest.java

@@ -8,6 +8,7 @@
 import fr.ouestfrance.querydsl.postgrest.model.Page;
 import fr.ouestfrance.querydsl.postgrest.model.Pageable;
 import lombok.SneakyThrows;
+import org.apache.commons.lang3.reflect.TypeUtils;
 import org.apache.hc.client5.http.impl.classic.HttpClients;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
@@ -31,13 +32,16 @@
 class PostgrestRestTemplateRepositoryTest {
 
     private PostgrestRepository<Post> repository;
+    private PostgrestRpcClient rpcClient;
 
     @BeforeEach
     void beforeEach(MockServerClient client) {
         client.reset();
         RestTemplate restTemplate = new RestTemplate();
         restTemplate.setRequestFactory(new HttpComponentsClientHttpRequestFactory(HttpClients.createDefault()));
-        repository = new PostRepository(PostgrestRestTemplate.of(restTemplate, "http://localhost:8007"));
+        PostgrestRestTemplate postgrestRestTemplate = PostgrestRestTemplate.of(restTemplate, "http://localhost:8007");
+        repository = new PostRepository(postgrestRestTemplate);
+        rpcClient = new PostgrestRpcClient(postgrestRestTemplate);
     }
 
     @Test
@@ -185,6 +189,37 @@ void shouldDeleteBulkPost(MockServerClient client) {
         assertTrue(result.isEmpty());
     }
 
+
+    @Test
+    void shouldCallRpc(MockServerClient client) {
+        client.when(HttpRequest.request().withPath("/rpc/testV1"))
+                .respond(jsonResponse("""
+                        {"id": 1, "title": "test"}
+                        """));
+
+        Post result = rpcClient.executeRpc("testV1", null, Post.class);
+        assertNotNull(result);
+        System.out.println(result);
+       }
+
+
+    @Test
+    void shouldCallRpcResultIsList(MockServerClient client) {
+        client.when(HttpRequest.request().withPath("/rpc/testV1"))
+                .respond(jsonResponse("""
+                        [{"id": 1, "title": "test"}]
+                        """));
+
+        List<Post> result = rpcClient.executeRpc("testV1", null, TypeUtils.parameterize(List.class, Post.class));
+        assertNotNull(result);
+        System.out.println(result);
+       }
+
+    private HttpResponse jsonResponse(String content) {
+        return HttpResponse.response().withContentType(MediaType.APPLICATION_JSON)
+                .withBody(content);
+    }
+
     private HttpResponse jsonFileResponse(String resourceFileName) {
         return HttpResponse.response().withContentType(MediaType.APPLICATION_JSON)
                 .withBody(jsonOf(resourceFileName));

querydsl-postgrest-resttemplate-adapter/src/test/java/fr/ouestfrance/querydsl/postgrest/PostgrestRpcTest.java

@@ -0,0 +1,75 @@
+package fr.ouestfrance.querydsl.postgrest;
+
+import fr.ouestfrance.querydsl.postgrest.app.Post;
+import fr.ouestfrance.querydsl.postgrest.app.PostRequestWithSelect;
+import org.apache.commons.lang3.reflect.TypeUtils;
+import org.apache.hc.client5.http.impl.classic.HttpClients;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.mockserver.client.MockServerClient;
+import org.mockserver.junit.jupiter.MockServerSettings;
+import org.mockserver.model.HttpRequest;
+import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
+import org.springframework.web.client.RestTemplate;
+
+import java.util.List;
+
+import static fr.ouestfrance.querydsl.postgrest.TestUtils.jsonResponse;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+@MockServerSettings(ports = 8007)
+class PostgrestRpcTest {
+
+    private PostgrestRpcClient rpcClient;
+
+    @BeforeEach
+    void beforeEach(MockServerClient client) {
+        client.reset();
+        RestTemplate restTemplate = new RestTemplate();
+        restTemplate.setRequestFactory(new HttpComponentsClientHttpRequestFactory(HttpClients.createDefault()));
+        PostgrestRestTemplate postgrestRestTemplate = PostgrestRestTemplate.of(restTemplate, "http://localhost:8007");
+        rpcClient = new PostgrestRpcClient(postgrestRestTemplate);
+    }
+
+    @Test
+    void shouldCallRpc(MockServerClient client) {
+        client.when(HttpRequest.request().withPath("/rpc/testV1"))
+                .respond(jsonResponse("""
+                        {"id": 1, "title": "test"}
+                        """));
+        Post result = rpcClient.executeRpc("testV1",  Post.class);
+        assertNotNull(result);
+    }
+
+    @Test
+    void shouldCallRpcWithCriteria(MockServerClient client) {
+        client.when(HttpRequest.request().withPath("/rpc/testV1")
+                        .withQueryStringParameter("userId", "eq.1")
+                        .withQueryStringParameter("select", "title,userId"))
+                .respond(jsonResponse("""
+                        {"id": 1, "title": "test"}
+                        """));
+
+        PostRequestWithSelect criteria = new PostRequestWithSelect();
+        criteria.setUserId(1);
+        Post result = rpcClient.executeRpc("testV1", criteria,null, Post.class);
+        assertNotNull(result);
+        System.out.println(result);
+    }
+
+    @Test
+    void shouldCallRpcWithCriteriaResultIsList(MockServerClient client) {
+        client.when(HttpRequest.request().withPath("/rpc/testV1")
+                        .withQueryStringParameter("userId", "eq.1")
+                        .withQueryStringParameter("select", "title,userId"))
+                .respond(jsonResponse("""
+                        [{"id": 1, "title": "test"}]
+                        """));
+
+        PostRequestWithSelect criteria = new PostRequestWithSelect();
+        criteria.setUserId(1);
+        List<Post> result = rpcClient.executeRpc("testV1", criteria, null, TypeUtils.parameterize(List.class, Post.class));
+        assertNotNull(result);
+        System.out.println(result);
+    }
+}

querydsl-postgrest-resttemplate-adapter/src/test/java/fr/ouestfrance/querydsl/postgrest/TestUtils.java

@@ -0,0 +1,29 @@
+package fr.ouestfrance.querydsl.postgrest;
+
+import lombok.SneakyThrows;
+import org.mockserver.model.HttpResponse;
+import org.mockserver.model.MediaType;
+import shaded_package.org.apache.commons.io.IOUtils;
+
+import java.nio.charset.Charset;
+
+import static org.mockserver.model.HttpResponse.response;
+
+public class TestUtils {
+
+    public static HttpResponse jsonResponse(String content) {
+        return HttpResponse.response().withContentType(MediaType.APPLICATION_JSON)
+                .withBody(content);
+    }
+
+
+    public static HttpResponse jsonFileResponse(String resourceFileName) {
+        return response().withContentType(MediaType.APPLICATION_JSON)
+                .withBody(jsonOf(resourceFileName));
+    }
+
+    @SneakyThrows
+    public static String jsonOf(String name) {
+        return IOUtils.resourceToString(name, Charset.defaultCharset(), TestUtils.class.getClassLoader());
+    }
+}

querydsl-postgrest-resttemplate-adapter/src/test/java/fr/ouestfrance/querydsl/postgrest/app/PostRequestWithSelect.java

@@ -0,0 +1,22 @@
+package fr.ouestfrance.querydsl.postgrest.app;
+
+import fr.ouestfrance.querydsl.FilterField;
+import fr.ouestfrance.querydsl.FilterOperation;
+import fr.ouestfrance.querydsl.postgrest.annotations.Select;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Getter
+@Setter
+@AllArgsConstructor
+@NoArgsConstructor
+@Select({"title", "userId"})
+public class PostRequestWithSelect {
+
+    @FilterField
+    private Integer userId;
+    @FilterField(operation = FilterOperation.NEQ.class)
+    private Integer id;
+}

querydsl-postgrest-webclient-adapter/src/main/java/fr/ouestfrance/querydsl/postgrest/PostgrestWebClient.java

@@ -6,6 +6,7 @@
 import fr.ouestfrance.querydsl.postgrest.model.RangeResponse;
 import lombok.AccessLevel;
 import lombok.RequiredArgsConstructor;
+import org.springframework.core.ParameterizedTypeReference;
 import org.springframework.http.HttpEntity;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.MediaType;
@@ -14,6 +15,8 @@
 import org.springframework.util.MultiValueMap;
 import org.springframework.web.reactive.function.client.WebClient;
 
+import java.lang.reflect.ParameterizedType;
+import java.lang.reflect.Type;
 import java.util.List;
 import java.util.Map;
 import java.util.Optional;
@@ -83,9 +86,29 @@ public List<CountItem> count(String resource, Map<String, List<String>> params)
         return Optional.ofNullable(response).map(HttpEntity::getBody).orElse(List.of());
     }
 
+    @Override
+    public <V> V rpc(String rpcName, Map<String, List<String>> params, Object body, Type clazz) {
+        WebClient.RequestBodySpec request = webClient.post().uri(uriBuilder -> {
+            uriBuilder.path(rpcName);
+            uriBuilder.queryParams(toMultiMap(params));
+            return uriBuilder.build();
+        });
+        if(body != null){
+            request.bodyValue(body);
+        }
+        Object result = request
+                .retrieve()
+                .bodyToMono(ParameterizedTypeReference.forType(clazz))
+                .block();
+        if(result != null) {
+            return (V) result;
+        }
+        return null;
+    }
+
 
     @Override
-    public <T> BulkResponse<T> post(String resource, Map<String, List<String>> params, List<Object> value, Map<String, List<String>> headers, Class<T> clazz) {
+    public <T> BulkResponse<T> post(String resource, Map<String, List<String>> params, Object value, Map<String, List<String>> headers, Class<T> clazz) {
         ResponseEntity<List<T>> response = webClient.post().uri(uriBuilder -> {
                     uriBuilder.path(resource);
                     uriBuilder.queryParams(toMultiMap(params));
@@ -119,7 +142,8 @@ public <T> BulkResponse<T> delete(String resource, Map<String, List<String>> par
                     uriBuilder.path(resource);
                     uriBuilder.queryParams(toMultiMap(params));
                     return uriBuilder.build();
-                }).headers(httpHeaders -> safeAdd(headers, httpHeaders))
+                })
+                .headers(httpHeaders -> safeAdd(headers, httpHeaders))
                 .retrieve()
                 .toEntity(listRef(clazz)).block();
         return toBulkResponse(response);