Bael 738 (#1478)

* BAEL-724 code for put/patch article

* BAEL-724 fix typo

* BAEL-728 more generic patch approach

spring-rest/src/main/java/org/baeldung/repository/HeavyResourceRepository.java

@@ -1,14 +1,20 @@
 package org.baeldung.repository;
 
 import org.baeldung.web.dto.HeavyResource;
-import org.baeldung.web.dto.HeavyResourceAddressPartialUpdate;
+import org.baeldung.web.dto.HeavyResourceAddressOnly;
+
+import java.util.Map;
 
 public class HeavyResourceRepository {
 
     public void save(HeavyResource heavyResource) {
     }
 
-    public void save(HeavyResourceAddressPartialUpdate partialUpdate) {
+    public void save(HeavyResourceAddressOnly partialUpdate) {
+
+    }
+
+    public void save(Map<String, Object> updates, String id) {
 
     }
 }

spring-rest/src/main/java/org/baeldung/web/controller/HeavyResourceController.java

@@ -3,13 +3,12 @@ package org.baeldung.web.controller;
 
 import org.baeldung.repository.HeavyResourceRepository;
 import org.baeldung.web.dto.HeavyResource;
-import org.baeldung.web.dto.HeavyResourceAddressPartialUpdate;
+import org.baeldung.web.dto.HeavyResourceAddressOnly;
 import org.springframework.http.MediaType;
 import org.springframework.http.ResponseEntity;
-import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.*;
-import org.springframework.web.bind.annotation.RequestMapping;
+
-import org.springframework.web.bind.annotation.RequestMethod;
+import java.util.Map;
-import org.springframework.web.bind.annotation.RestController;
 
 @RestController
 public class HeavyResourceController {
@@ -23,9 +22,16 @@ public class HeavyResourceController {
     }
 
     @RequestMapping(value = "/heavy", method = RequestMethod.PATCH, consumes = MediaType.APPLICATION_JSON_VALUE)
-    public ResponseEntity<?> partialUpdateName(@RequestBody HeavyResourceAddressPartialUpdate partialUpdate) {
+    public ResponseEntity<?> partialUpdateName(@RequestBody HeavyResourceAddressOnly partialUpdate) {
         heavyResourceRepository.save(partialUpdate);
         return ResponseEntity.ok("resource address updated");
     }
 
+    @RequestMapping(value = "/heavy/{id}", method = RequestMethod.PATCH, consumes = MediaType.APPLICATION_JSON_VALUE)
+    public ResponseEntity<?> partialUpdateGeneric(@RequestBody Map<String, Object> updates,
+                                                  @PathVariable("id") String id) {
+        heavyResourceRepository.save(updates, id);
+        return ResponseEntity.ok("resource updated");
+    }
+
 }

spring-rest/src/main/java/org/baeldung/web/dto/HeavyResourceAddressOnly.java

@@ -0,0 +1,31 @@
+package org.baeldung.web.dto;
+
+
+public class HeavyResourceAddressOnly {
+    private Integer id;
+    private String address;
+
+    public HeavyResourceAddressOnly() {
+    }
+
+    public HeavyResourceAddressOnly(Integer id, String address) {
+        this.id = id;
+        this.address = address;
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getAddress() {
+        return address;
+    }
+
+    public void setAddress(String address) {
+        this.address = address;
+    }
+}

spring-rest/src/test/java/org/baeldung/web/controller/HeavyResourceControllerTest.java

@@ -3,7 +3,7 @@ package org.baeldung.web.controller;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import org.baeldung.config.WebConfig;
 import org.baeldung.web.dto.HeavyResource;
-import org.baeldung.web.dto.HeavyResourceAddressPartialUpdate;
+import org.baeldung.web.dto.HeavyResourceAddressOnly;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -16,6 +16,8 @@ import org.springframework.test.web.servlet.MockMvc;
 import org.springframework.test.web.servlet.setup.MockMvcBuilders;
 import org.springframework.web.context.WebApplicationContext;
 
+import java.util.HashMap;
+
 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.patch;
 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.put;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
@@ -47,10 +49,21 @@ public class HeavyResourceControllerTest {
     }
 
     @Test
-    public void givenNewAddressOfResource_whenExecutePutRequest_thenUpdateResourcePartially() throws Exception {
+    public void givenNewAddressOfResource_whenExecutePatchRequest_thenUpdateResourcePartially() throws Exception {
         mockMvc.perform(patch("/heavy")
                 .contentType(MediaType.APPLICATION_JSON_VALUE)
-                .content(objectMapper.writeValueAsString(new HeavyResourceAddressPartialUpdate(1, "5th avenue")))
+                .content(objectMapper.writeValueAsString(new HeavyResourceAddressOnly(1, "5th avenue")))
+        ).andExpect(status().isOk());
+    }
+
+    @Test
+    public void givenNewAddressOfResource_whenExecutePatchGeneric_thenUpdateResourcePartially() throws Exception {
+        HashMap<String, Object> updates = new HashMap<>();
+        updates.put("address", "5th avenue");
+
+        mockMvc.perform(patch("/heavy/1")
+                .contentType(MediaType.APPLICATION_JSON_VALUE)
+                .content(objectMapper.writeValueAsString(updates))
         ).andExpect(status().isOk());
     }