From c6f148b33422f0d1660a4289f413193011736475 Mon Sep 17 00:00:00 2001
From: Marcin Chrzanowski <marcin.j.chrzanowski@gmail.com>
Date: Mon, 30 Dec 2019 11:46:07 +0100
Subject: Test multiple queries in Qurnik

---
 .../edu/mimuw/cloudatlas/model/AttributesUtil.java  | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 src/main/java/pl/edu/mimuw/cloudatlas/model/AttributesUtil.java

(limited to 'src/main/java/pl/edu/mimuw/cloudatlas/model/AttributesUtil.java')

diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/model/AttributesUtil.java b/src/main/java/pl/edu/mimuw/cloudatlas/model/AttributesUtil.java
new file mode 100644
index 0000000..cd2ae91
--- /dev/null
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/model/AttributesUtil.java
@@ -0,0 +1,21 @@
+package pl.edu.mimuw.cloudatlas.model;
+
+import java.util.Iterator;
+import java.util.Map.Entry;
+
+public class AttributesUtil {
+    public static void transferAttributes(AttributesMap fromAttributes, AttributesMap toAttributes) {
+        Iterator<Entry<Attribute, Value>> iterator = toAttributes.iterator();
+        while (iterator.hasNext()) {
+            Entry<Attribute, Value> entry = iterator.next();
+            Attribute attribute = entry.getKey();
+            Value newValue = fromAttributes.getOrNull(attribute);
+            if (newValue == null) {
+                iterator.remove();
+            }
+        }
+        for (Entry<Attribute, Value> entry : fromAttributes) {
+            toAttributes.addOrChange(entry.getKey(), entry.getValue());
+        }
+    }
+}
-- 
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