1 files changed, 107 insertions, 0 deletions
diff --git a/container-core/src/main/java/com/yahoo/container/di/componentgraph/core/ComponentRegistryNode.java b/container-core/src/main/java/com/yahoo/container/di/componentgraph/core/ComponentRegistryNode.java
new file mode 100644
index 00000000000..429052c0039
--- /dev/null
+++ b/container-core/src/main/java/com/yahoo/container/di/componentgraph/core/ComponentRegistryNode.java
@@ -0,0 +1,107 @@
+// Copyright 2018 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.container.di.componentgraph.core;
+
+import com.google.inject.Key;
+import com.google.inject.util.Types;
+import com.yahoo.component.ComponentId;
+import com.yahoo.component.provider.ComponentRegistry;
+import com.yahoo.config.ConfigInstance;
+import com.yahoo.vespa.config.ConfigKey;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+/**
+ * @author Tony Vaagenes
+ * @author gjoranv
+ * @author ollivir
+ */
+public class ComponentRegistryNode extends Node {
+
+    private static ComponentId componentRegistryNamespace = ComponentId.fromString("ComponentRegistry");
+
+    private final Class<?> componentClass;
+
+    public ComponentRegistryNode(Class<?> componentClass) {
+        super(componentId(componentClass));
+        this.componentClass = componentClass;
+    }
+
+    @Override
+    public List<Node> usedComponents() {
+        return componentsToInject;
+    }
+
+    @Override
+    protected Object newInstance() {
+        ComponentRegistry<Object> registry = new ComponentRegistry<>();
+        componentsToInject.forEach(component -> registry.register(component.componentId(), component.component()));
+
+        return registry;
+    }
+
+    @Override
+    public Key<?> instanceKey() {
+        return Key.get(Types.newParameterizedType(ComponentRegistry.class, componentClass));
+    }
+
+    @Override
+    public Class<?> instanceType() {
+        return instanceKey().getTypeLiteral().getRawType();
+    }
+
+    @Override
+    public Class<?> componentType() {
+        return instanceType();
+    }
+
+    public Class<?> componentClass() {
+        return componentClass;
+    }
+
+    @Override
+    public Set<ConfigKey<ConfigInstance>> configKeys() {
+        return Collections.emptySet();
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = super.hashCode();
+        result = prime * result + ((componentClass == null) ? 0 : componentClass.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        if (other instanceof ComponentRegistryNode) {
+            ComponentRegistryNode that = (ComponentRegistryNode) other;
+            return this.componentId().equals(that.componentId()) && this.instanceType().equals(that.instanceType())
+                    && equalNodeEdges(this.usedComponents(), that.usedComponents());
+        } else {
+            return false;
+        }
+    }
+
+    @Override
+    public String label() {
+        return String.format("{ComponentRegistry\\<%s\\>|%s}", componentClass.getSimpleName(), Node.packageName(componentClass));
+    }
+
+    private static ComponentId componentId(Class<?> componentClass) {
+        return syntheticComponentId(componentClass.getName(), componentClass, componentRegistryNamespace);
+    }
+
+    public static boolean equalNodeEdges(List<Node> edges, List<Node> otherEdges) {
+        if (edges.size() == otherEdges.size()) {
+            List<ComponentId> left = edges.stream().map(Node::componentId).sorted().collect(Collectors.toList());
+            List<ComponentId> right = otherEdges.stream().map(Node::componentId).sorted().collect(Collectors.toList());
+            return left.equals(right);
+        } else {
+            return false;
+        }
+    }
+
+}