Use constant time hash lookups for non-struct and non-string fields for getFieldValue() and getField().

1 files changed, 21 insertions, 0 deletions

diff --git a/document/src/main/java/com/yahoo/document/ExtendedField.java b/document/src/main/java/com/yahoo/document/ExtendedField.java
new file mode 100644
index 00000000000..672a824bcf4
--- /dev/null
+++ b/document/src/main/java/com/yahoo/document/ExtendedField.java
@@ -0,0 +1,21 @@
+package com.yahoo.document;
+
+import com.yahoo.document.datatypes.FieldValue;
+
+/**
+ * Created by balder on 14/11/2016.
+ */
+class ExtendedField extends Field {
+    static interface Extract {
+        Object get(Document doc);
+    }
+    private final Extract extract;
+    ExtendedField(String name, DataType type, Extract extract) {
+        super(name, type);
+        this.extract = extract;
+    }
+    FieldValue getFieldValue(Document doc) {
+        Object raw = extract.get(doc);
+        return raw == null ? null : getDataType().createFieldValue(raw);
+    }
+}