Map array of binary strings to List<MultipartFile>

processArray resolved simple array item types via MapperUtil.getSimpleType,
which has no binary detection, so `type: array, items: {type: string,
format: binary}` produced List<String>. Detect binary items with
ApiTool.isBinary (covers both OpenAPI 3.0 `format: binary` and 3.1
contentEncoding/contentMediaType) and map them to MultipartFile, matching
the existing scalar-property behaviour in processStringProperty.

Adds an array-of-binary property to the testSimpleBuild Document schema as a
regression test.

Fixes #386

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: joseegarcia

multiapi-engine/src/main/java/com/sngular/api/generator/plugin/common/tools/ModelBuilder.java

@@ -493,10 +493,11 @@ private static List<SchemaFieldObject> processArray(
                                      .dataType(SchemaFieldObjectType.fromTypeList(TypeConstants.ARRAY, MapperUtil.getPojoName(fieldName, specFile)))
                                      .build());
       } else {
+        final String itemType = ApiTool.isBinary(items) ? TypeConstants.MULTIPART_FILE : MapperUtil.getSimpleType(items, specFile);
         final SchemaFieldObject field = SchemaFieldObject
                                             .builder()
                                             .baseName(fieldName)
-                                            .dataType(SchemaFieldObjectType.fromTypeList(TypeConstants.ARRAY, MapperUtil.getSimpleType(items, specFile)))
+                                            .dataType(SchemaFieldObjectType.fromTypeList(TypeConstants.ARRAY, itemType))
                                             .build();
         fieldObjectArrayList.add(field);
         addPropertiesToFieldObject(field, schema);

multiapi-engine/src/test/resources/openapigenerator/testSimpleBuild/api-rest.yaml

@@ -522,6 +522,11 @@ components:
           type: string
           format: binary
           example: invoice01234.pdf
+        attachments:
+          type: array
+          items:
+            type: string
+            format: binary
         description:
           type: string
           example: Invoice for the sale 01234

multiapi-engine/src/test/resources/openapigenerator/testSimpleBuild/assets/model/DocumentDTO.java

@@ -2,7 +2,10 @@
 
 import com.fasterxml.jackson.annotation.JsonProperty;
 import org.springframework.web.multipart.MultipartFile;
+import java.util.List;
+import java.util.ArrayList;
 import lombok.Builder;
+import lombok.Singular;
 import lombok.Value;
 import lombok.extern.jackson.Jacksonized;
 
@@ -12,14 +15,19 @@ public class DocumentDTO {
   @JsonProperty(value ="description")
   private String description;
 
+  @JsonProperty(value ="attachments")
+  @Singular("attachment")
+  private List<MultipartFile> attachments;
+
   @JsonProperty(value ="document")
   private MultipartFile document;
 
 
   @Builder
   @Jacksonized
-  private DocumentDTO(String description, MultipartFile document) {
+  private DocumentDTO(String description, List<MultipartFile> attachments, MultipartFile document) {
     this.description = description;
+    this.attachments = attachments;
     this.document = document;
 
   }