2 * Copyright (c) 2016 Brocade Communications Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.controller.cluster.datastore.utils;
10 import com.google.common.base.Throwables;
11 import java.io.DataOutputStream;
13 import java.io.FileOutputStream;
14 import java.io.IOException;
15 import javax.xml.stream.XMLStreamException;
16 import org.opendaylight.controller.cluster.datastore.util.AbstractDataTreeModificationCursor;
17 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
18 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
19 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeModification;
20 import org.slf4j.Logger;
21 import org.slf4j.LoggerFactory;
24 * Utility class to output DataTreeModifications in readable format.
26 * @author Thomas Pantelis
28 public final class DataTreeModificationOutput {
29 private static final Logger LOG = LoggerFactory.getLogger(DataTreeModificationOutput.class);
31 private DataTreeModificationOutput() {
34 public static void toFile(File file, DataTreeModification modification) {
35 try(FileOutputStream outStream = new FileOutputStream(file)) {
36 modification.applyToCursor(new DataTreeModificationOutputCursor(new DataOutputStream(outStream)));
37 } catch(Exception e) {
38 LOG.error("Error writing DataTreeModification to file {}", file, e);
42 private static class DataTreeModificationOutputCursor extends AbstractDataTreeModificationCursor {
43 private final DataOutputStream output;
45 DataTreeModificationOutputCursor(DataOutputStream output) {
50 public void delete(PathArgument child) {
52 output.write("\nDELETE -> ".getBytes());
53 output.write(current().node(child).toString().getBytes());
54 output.writeByte('\n');
55 } catch(IOException e) {
56 Throwables.propagate(e);
61 public void merge(PathArgument child, NormalizedNode<?, ?> data) {
62 outputPathAndNode("MERGE", child, data);
66 public void write(PathArgument child, NormalizedNode<?, ?> data) {
67 outputPathAndNode("WRITE", child, data);
70 private void outputPathAndNode(String name, PathArgument child, NormalizedNode<?, ?> data) {
72 output.writeByte('\n');
73 output.write(name.getBytes());
74 output.write(" -> ".getBytes());
75 output.write(current().node(child).toString().getBytes());
76 output.write(": \n".getBytes());
77 NormalizedNodeXMLOutput.toStream(output, data);
78 output.writeByte('\n');
79 } catch(IOException | XMLStreamException e) {
80 Throwables.propagate(e);