opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/utils/NormalizedNodeXMLOutput.java

   1 /*
   2  * Copyright (c) 2016 Brocade Communications Systems, Inc. and others.  All rights reserved.
   3  *
   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
   7  */
   8 package org.opendaylight.controller.cluster.datastore.utils;
   9
  10 import java.io.File;
  11 import java.io.FileOutputStream;
  12 import java.io.IOException;
  13 import java.io.OutputStream;
  14 import javanet.staxutils.IndentingXMLStreamWriter;
  15 import javax.xml.stream.XMLOutputFactory;
  16 import javax.xml.stream.XMLStreamException;
  17 import javax.xml.stream.XMLStreamWriter;
  18 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  19 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
  20 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeWriter;
  21 import org.opendaylight.yangtools.yang.data.codec.xml.XMLStreamNormalizedNodeStreamWriter;
  22 import org.slf4j.Logger;
  23 import org.slf4j.LoggerFactory;
  24
  25 /**
  26  * Utility class to output NormalizedNodes as XML.
  27  *
  28  * @author Thomas Pantelis
  29  */
  30 public final class NormalizedNodeXMLOutput {
  31     private static final Logger LOG = LoggerFactory.getLogger(NormalizedNodeXMLOutput.class);
  32     private static final XMLOutputFactory XOF;
  33
  34     static {
  35         final XMLOutputFactory f = XMLOutputFactory.newFactory();
  36         f.setProperty(XMLOutputFactory.IS_REPAIRING_NAMESPACES, true);
  37         XOF = f;
  38     }
  39
  40     private NormalizedNodeXMLOutput() {
  41     }
  42
  43     public static void toStream(final OutputStream outStream, final NormalizedNode node)
  44             throws XMLStreamException, IOException {
  45         XMLStreamWriter xmlWriter = XOF.createXMLStreamWriter(outStream);
  46
  47         IndentingXMLStreamWriter indenting = new IndentingXMLStreamWriter(xmlWriter);
  48         try (NormalizedNodeStreamWriter streamWriter = XMLStreamNormalizedNodeStreamWriter.createSchemaless(
  49                 indenting)) {
  50             NormalizedNodeWriter nodeWriter = NormalizedNodeWriter.forStreamWriter(streamWriter);
  51             nodeWriter.write(node);
  52             nodeWriter.flush();
  53         }
  54     }
  55
  56     public static void toFile(final File file, final NormalizedNode node) {
  57         try (FileOutputStream outStream = new FileOutputStream(file)) {
  58             toStream(outStream, node);
  59         } catch (IOException | XMLStreamException e) {
  60             LOG.error("Error writing NormalizedNode to file {}", file, e);
  61         }
  62     }
  63 }