ForwardingRead[Only]/WriteTransaction implementations

[controller.git] / opendaylight / md-sal / sal-binding-api / src / main / java / org / opendaylight / controller / md / sal / binding / api / ForwardingReadOnlyTransaction.java

diff --git a/opendaylight/md-sal/sal-binding-api/src/main/java/org/opendaylight/controller/md/sal/binding/api/ForwardingReadOnlyTransaction.java b/opendaylight/md-sal/sal-binding-api/src/main/java/org/opendaylight/controller/md/sal/binding/api/ForwardingReadOnlyTransaction.java
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+++ b/opendaylight/md-sal/sal-binding-api/src/main/java/org/opendaylight/controller/md/sal/binding/api/ForwardingReadOnlyTransaction.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2017 Red Hat, 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.controller.md.sal.binding.api;
+
+import com.google.common.base.Optional;
+import com.google.common.collect.ForwardingObject;
+import com.google.common.util.concurrent.CheckedFuture;
+import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
+import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+/**
+ * Utility {@link ReadOnlyTransaction} implementation which forwards all interface method
+ * invocation to a delegate instance.
+ */
+@SuppressWarnings("deprecation") // due to CheckedFuture
+public class ForwardingReadOnlyTransaction extends ForwardingObject implements ReadOnlyTransaction {
+
+    private final ReadOnlyTransaction delegate;
+
+    protected ForwardingReadOnlyTransaction(ReadOnlyTransaction delegate) {
+        super();
+        this.delegate = delegate;
+    }
+
+    @Override
+    protected ReadTransaction delegate() {
+        return delegate;
+    }
+
+    @Override
+    public <T extends DataObject> CheckedFuture<Optional<T>, ReadFailedException> read(LogicalDatastoreType store,
+            InstanceIdentifier<T> path) {
+        return delegate.read(store, path);
+    }
+
+    @Override
+    public Object getIdentifier() {
+        return delegate.getIdentifier();
+    }
+
+    @Override
+    public void close() {
+        delegate.close();
+    }
+}