1 files changed, 65 insertions, 0 deletions
diff --git a/config-lib/src/main/java/com/yahoo/config/UrlNode.java b/config-lib/src/main/java/com/yahoo/config/UrlNode.java
new file mode 100644
index 00000000000..0ed70ce0f50
--- /dev/null
+++ b/config-lib/src/main/java/com/yahoo/config/UrlNode.java
@@ -0,0 +1,65 @@
+// Copyright 2018 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.config;
+
+import edu.umd.cs.findbugs.annotations.NonNull;
+
+import java.io.File;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+/**
+ * Represents a 'url' in a {@link ConfigInstance}, which will be downloaded
+ * and made available as a {@link File}. Stored in the config builder as a
+ * {@link UrlReference} to identify fields of this type for special handling
+ * in the ConfigPayloadApplier.
+ *
+ * @author lesters
+ */
+public class UrlNode extends LeafNode<File> {
+
+    private final UrlReference url;
+
+    public UrlNode() {
+        url = null;
+    }
+
+    public UrlNode(UrlReference url) {
+        super(true);
+        this.url = url;
+        this.value = new File(url.value());
+    }
+
+    public File value() {
+        return value;
+    }
+
+    @Override
+    public String toString() {
+        return (value == null) ? "(null)" : '"' + getValue() + '"';
+    }
+
+    @Override
+    public String getValue() {
+        return value.toString();
+    }
+
+    @Override
+    protected boolean doSetValue(@NonNull String value) {
+        throw new UnsupportedOperationException("doSetValue should not be necessary since the library anymore!");
+    }
+
+    public UrlReference getUrlReference() {
+        return url;
+    }
+
+    public static List<UrlReference> toUrlReferences(List<UrlNode> urlNodes) {
+        return urlNodes.stream().map(UrlNode::getUrlReference).collect(Collectors.toList());
+    }
+
+    public static Map<String, UrlReference> toUrlReferenceMap(Map<String, UrlNode> urlNodeMap) {
+        return urlNodeMap.entrySet().stream().collect(
+                Collectors.toMap(Map.Entry::getKey, e -> e.getValue().getUrlReference()));
+    }
+
+}