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

   1 /*
   2  * Copyright (c) 2014 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 com.google.common.base.Preconditions;
  11 import java.io.DataInput;
  12 import java.io.DataOutput;
  13 import java.io.IOException;
  14 import org.opendaylight.controller.cluster.datastore.node.utils.stream.NormalizedNodeInputStreamReader;
  15 import org.opendaylight.controller.cluster.datastore.node.utils.stream.NormalizedNodeOutputStreamWriter;
  16 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  17 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  18 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeWriter;
  19
  20 /**
  21  * Provides various utility methods for serialization and de-serialization.
  22  *
  23  * @author Thomas Pantelis
  24  */
  25 public final class SerializationUtils {
  26     public static interface Applier<T> {
  27         void apply(T instance, YangInstanceIdentifier path, NormalizedNode<?, ?> node);
  28     }
  29
  30     public static void serializePathAndNode(YangInstanceIdentifier path, NormalizedNode<?, ?> node,
  31             DataOutput out) {
  32         Preconditions.checkNotNull(path);
  33         Preconditions.checkNotNull(node);
  34         try {
  35             NormalizedNodeOutputStreamWriter streamWriter = new NormalizedNodeOutputStreamWriter(out);
  36             NormalizedNodeWriter.forStreamWriter(streamWriter).write(node);
  37             streamWriter.writeYangInstanceIdentifier(path);
  38         } catch (IOException e) {
  39             throw new IllegalArgumentException(String.format("Error serializing path {} and Node {}",
  40                     path, node), e);
  41         }
  42     }
  43
  44     public static <T> void deserializePathAndNode(DataInput in, T instance, Applier<T> applier) {
  45         try {
  46             NormalizedNodeInputStreamReader streamReader = new NormalizedNodeInputStreamReader(in);
  47             NormalizedNode<?, ?> node = streamReader.readNormalizedNode();
  48             YangInstanceIdentifier path = streamReader.readYangInstanceIdentifier();
  49             applier.apply(instance, path, node);
  50         } catch (IOException e) {
  51             throw new IllegalArgumentException("Error deserializing path and Node", e);
  52         }
  53     }
  54
  55     public static void serializeNormalizedNode(NormalizedNode<?, ?> node, DataOutput out) {
  56         try {
  57             out.writeBoolean(node != null);
  58             if(node != null) {
  59                 NormalizedNodeOutputStreamWriter streamWriter = new NormalizedNodeOutputStreamWriter(out);
  60                 NormalizedNodeWriter.forStreamWriter(streamWriter).write(node);
  61             }
  62         } catch (IOException e) {
  63             throw new IllegalArgumentException(String.format("Error serializing NormalizedNode {}",
  64                     node), e);
  65         }
  66     }
  67
  68     public static NormalizedNode<?, ?> deserializeNormalizedNode(DataInput in) {
  69             try {
  70                 boolean present = in.readBoolean();
  71                 if(present) {
  72                     NormalizedNodeInputStreamReader streamReader = new NormalizedNodeInputStreamReader(in);
  73                     return streamReader.readNormalizedNode();
  74                 }
  75             } catch (IOException e) {
  76                 throw new IllegalArgumentException("Error deserializing NormalizedNode", e);
  77             }
  78
  79         return null;
  80     }
  81 }