Minor: Add an API to list all the properties and custom properties for a given entity type

openmetadata-service/pom.xml

@@ -294,6 +294,10 @@
       <groupId>io.dropwizard.modules</groupId>
       <artifactId>dropwizard-web</artifactId>
     </dependency>
+    <dependency>
+      <groupId>com.github.erosb</groupId>
+      <artifactId>everit-json-schema</artifactId>
+    </dependency>
 
     <!-- Dependencies for cloudwatch monitoring -->
     <dependency>

openmetadata-service/src/main/java/org/openmetadata/service/resources/types/TypeResource.java

@@ -26,6 +26,8 @@
 import io.swagger.v3.oas.annotations.responses.ApiResponse;
 import io.swagger.v3.oas.annotations.tags.Tag;
 import java.util.List;
+import java.util.Map;
+import java.util.Set;
 import java.util.UUID;
 import javax.json.JsonPatch;
 import javax.validation.Valid;
@@ -68,6 +70,7 @@
 import org.openmetadata.service.util.JsonUtils;
 import org.openmetadata.service.util.RestUtil.PutResponse;
 import org.openmetadata.service.util.ResultList;
+import org.openmetadata.service.util.SchemaFieldExtractor;
 
 @Path("/v1/metadata/types")
 @Tag(
@@ -466,6 +469,57 @@ public Response addOrUpdateProperty(
     return response.toResponse();
   }
 
+  @GET
+  @Path("/fields/{entityType}")
+  @Produces(MediaType.APPLICATION_JSON)
+  public Response getEntityTypeFields(
+      @Context UriInfo uriInfo,
+      @Context SecurityContext securityContext,
+      @PathParam("entityType") String entityType,
+      @QueryParam("include") @DefaultValue("non-deleted") Include include) {
+
+    try {
+      Fields fieldsParam = new Fields(Set.of("customProperties"));
+      Type typeEntity = repository.getByName(uriInfo, entityType, fieldsParam, include, false);
+      SchemaFieldExtractor extractor = new SchemaFieldExtractor();
+      List<SchemaFieldExtractor.FieldDefinition> fieldsList =
+          extractor.extractFields(typeEntity, entityType);
+      return Response.ok(fieldsList).type(MediaType.APPLICATION_JSON).build();
+
+    } catch (Exception e) {
+      LOG.error("Error processing schema for entity type: " + entityType, e);
+      return Response.status(Response.Status.INTERNAL_SERVER_ERROR)
+          .entity(
+              "Error processing schema for entity type: "
+                  + entityType
+                  + ". Exception: "
+                  + e.getMessage())
+          .build();
+    }
+  }
+
+  @GET
+  @Path("/customProperties")
+  @Produces(MediaType.APPLICATION_JSON)
+  public Response getAllCustomPropertiesByEntityType(
+      @Context UriInfo uriInfo, @Context SecurityContext securityContext) {
+    try {
+      SchemaFieldExtractor extractor = new SchemaFieldExtractor();
+      Map<String, List<SchemaFieldExtractor.FieldDefinition>> customPropertiesMap =
+          extractor.extractAllCustomProperties(uriInfo, repository);
+      return Response.ok(customPropertiesMap).build();
+    } catch (Exception e) {
+      LOG.error("Error fetching custom properties: {}", e.getMessage(), e);
+      return Response.status(Response.Status.INTERNAL_SERVER_ERROR)
+          .entity(
+              "Error processing schema for entity type: "
+                  + entityType
+                  + ". Exception: "
+                  + e.getMessage())
+          .build();
+    }
+  }
+
   private Type getType(CreateType create, String user) {
     return repository
         .copy(new Type(), create, user)