1 files changed, 56 insertions, 0 deletions
diff --git a/config-model/src/main/java/com/yahoo/schema/fieldoperation/StructFieldOperation.java b/config-model/src/main/java/com/yahoo/schema/fieldoperation/StructFieldOperation.java
new file mode 100644
index 00000000000..ac80f5023fc
--- /dev/null
+++ b/config-model/src/main/java/com/yahoo/schema/fieldoperation/StructFieldOperation.java
@@ -0,0 +1,56 @@
+// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.schema.fieldoperation;
+
+import com.yahoo.schema.document.SDField;
+
+import java.util.Collections;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.ListIterator;
+
+/**
+ * @author Einar M R Rosenvinge
+ */
+public class StructFieldOperation implements FieldOperation, FieldOperationContainer {
+
+    private final String structFieldName;
+    private final List<FieldOperation> pendingOperations = new LinkedList<>();
+
+    public StructFieldOperation(String structFieldName) {
+        this.structFieldName = structFieldName;
+    }
+
+    public void apply(SDField field) {
+        SDField structField = field.getStructField(structFieldName);
+        if (structField == null ) {
+            throw new IllegalArgumentException("Struct field '" + structFieldName + "' has not been defined in struct " +
+                                               "for field '" + field.getName() + "'.");
+        }
+
+        applyOperations(structField);
+    }
+
+    @Override
+    public void addOperation(FieldOperation op) {
+        pendingOperations.add(op);
+    }
+
+    @Override
+    public void applyOperations(SDField field) {
+        if (pendingOperations.isEmpty()) return;
+
+        Collections.sort(pendingOperations);
+        ListIterator<FieldOperation> ops = pendingOperations.listIterator();
+        while (ops.hasNext()) {
+            FieldOperation op = ops.next();
+            ops.remove();
+            op.apply(field);
+        }
+    }
+
+    @Override
+    public String getName() {
+        return structFieldName;
+    }
+
+}