/*
 * Copyright (c) 2014 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.yangtools.yang.data.api.schema.tree;

import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;

/**
 * A {@link DataTreeModification} implementation which delegates all calls to
 * another instance, making sure no method is being invoked from multiple threads
 * concurrently.
 */
public final class SynchronizedDataTreeModification implements DataTreeModification {
    private final DataTreeModification delegate;

    private SynchronizedDataTreeModification(final DataTreeModification delegate) {
        this.delegate = Preconditions.checkNotNull(delegate);
    }

    public DataTreeModification create(final DataTreeModification delegate) {
        return new SynchronizedDataTreeModification(delegate);
    }

    @Override
    public synchronized Optional<NormalizedNode<?, ?>> readNode(final YangInstanceIdentifier path) {
        return delegate.readNode(path);
    }

    @Override
    public synchronized DataTreeModification newModification() {
        return delegate.newModification();
    }

    @Override
    public synchronized void delete(final YangInstanceIdentifier path) {
        delegate.delete(path);
    }

    @Override
    public synchronized void merge(final YangInstanceIdentifier path, final NormalizedNode<?, ?> data) {
        delegate.merge(path, data);
    }

    @Override
    public synchronized void write(final YangInstanceIdentifier path, final NormalizedNode<?, ?> data) {
        delegate.write(path, data);
    }

    @Override
    public synchronized void ready() {
        delegate.ready();
    }
}

@@ -1078,16 +1078,23 @@
  public 
+static 
 DataTree

allow instantiation of SynchronizedDataTreeModification