Add imported fields to document configs

This adds the field names of all imported fields in a search definition
to the document configs associated with it (document manager and document
types config for Java and C++, respectively). This enables consumers of
these configs to distinguish between field references to imported fields
and fields that don't exist in the document schema itself.

1 files changed, 32 insertions, 0 deletions

diff --git a/config-model/src/main/java/com/yahoo/searchdefinition/ImportedFieldsEnumerator.java b/config-model/src/main/java/com/yahoo/searchdefinition/ImportedFieldsEnumerator.java
new file mode 100644
index 00000000000..c736ca8e9dc
--- /dev/null
+++ b/config-model/src/main/java/com/yahoo/searchdefinition/ImportedFieldsEnumerator.java
@@ -0,0 +1,32 @@
+package com.yahoo.searchdefinition;
+
+import com.yahoo.searchdefinition.document.SDDocumentType;
+import com.yahoo.searchdefinition.document.TemporaryImportedFields;
+
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * Enumerates and emplaces a set of all imported fields into a SDDocumentType from
+ * its corresponding Search instance.
+ */
+public class ImportedFieldsEnumerator {
+
+    private final List<Search> searchDefinitions;
+
+    public ImportedFieldsEnumerator(List<Search> searchDefinitions) {
+        this.searchDefinitions = searchDefinitions;
+    }
+
+    public void enumerateImportedFields(SDDocumentType documentType) {
+        var search = this.searchDefinitions.stream()
+                .filter(s -> s.getDocument() != null)
+                .filter(s -> s.getDocument().getName().equals(documentType.getName()))
+                .findFirst();
+        if (search.isEmpty()) {
+            return; // No imported fields present.
+        }
+        search.get().temporaryImportedFields().ifPresent(documentType::setTemporaryImportedFields);
+    }
+
+}