fix checkstyle

Author: lk255018

parquet/src/main/java/org/apache/iceberg/data/parquet/BaseParquetReaders.java

@@ -235,9 +235,11 @@ public ParquetValueReader<?> struct(
           Type fieldType = fields.get(i);
           int fieldD = type.getMaxDefinitionLevel(path(fieldType.getName())) - 1;
           int id =
-              fieldType.getId() != null
-                  ? fieldType.getId().intValue()
-                  : expected.fields().get(i).fieldId();
+                  fieldType.getId() != null
+                          ? fieldType.getId().intValue()
+                          :  i < expected.fields().size()
+                          ? expected.fields().get(i).fieldId()
+                          : -1;
           readersById.put(id, ParquetValueReaders.option(fieldType, fieldD, fieldReader));
         }
       }

parquet/src/main/java/org/apache/iceberg/parquet/TypeWithSchemaVisitor.java

@@ -201,9 +201,11 @@ private static <T> List<T> visitFields(
     int fieldIdFromStruct = 0;
     for (Type field : group.getFields()) {
       int id =
-          field.getId() != null
-              ? field.getId().intValue()
-              : (struct != null) ? struct.fields().get(fieldIdFromStruct).fieldId() : -1;
+              field.getId() != null
+                      ? field.getId().intValue()
+                      : (struct != null && fieldIdFromStruct < struct.fields().size())
+                      ? struct.fields().get(fieldIdFromStruct).fieldId()
+                      : -1;
       fieldIdFromStruct++;
       Types.NestedField iField = (struct != null && id >= 0) ? struct.field(id) : null;
       results.add(visitField(iField, field, visitor));