BUG-3128: Extract abstract shard implementations.

[mdsal.git] / dom / mdsal-dom-spi / src / main / java / org / opendaylight / mdsal / dom / spi / shard / DelegatingReadableCursorOperation.java

diff --git a/dom/mdsal-dom-spi/src/main/java/org/opendaylight/mdsal/dom/spi/shard/DelegatingReadableCursorOperation.java b/dom/mdsal-dom-spi/src/main/java/org/opendaylight/mdsal/dom/spi/shard/DelegatingReadableCursorOperation.java
new file mode 100644 (file)
index 0000000..09fb097
--- /dev/null
+++ b/dom/mdsal-dom-spi/src/main/java/org/opendaylight/mdsal/dom/spi/shard/DelegatingReadableCursorOperation.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2016 Cisco Systems, Inc. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.opendaylight.mdsal.dom.spi.shard;
+
+import com.google.common.base.Optional;
+import com.google.common.collect.ForwardingObject;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
+import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeSnapshotCursor;
+
+/**
+ * Delegating implementation of a {@link ReadableCursorOperation}.
+ */
+abstract class DelegatingReadableCursorOperation extends ForwardingObject implements ReadableCursorOperation {
+
+    @Override
+    protected abstract DataTreeSnapshotCursor delegate();
+
+    @Override
+    public Optional<NormalizedNode<?, ?>> readNode(final PathArgument arg) {
+        return delegate().readNode(arg);
+    }
+
+    @Override
+    public void exit() {
+        delegate().exit();
+    }
+
+    @Override
+    public DelegatingReadableCursorOperation enter(final PathArgument arg) {
+        delegate().enter(arg);
+        return this;
+    }
+}
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