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
  27     public static interface Applier<T> {
  28         void apply(T instance, YangInstanceIdentifier path, NormalizedNode<?, ?> node);
  29     }
  30
  31     public static void serializePathAndNode(YangInstanceIdentifier path, NormalizedNode<?, ?> node,
  32             DataOutput out) {
  33         Preconditions.checkNotNull(path);
  34         Preconditions.checkNotNull(node);
  35         try {
  36             NormalizedNodeOutputStreamWriter streamWriter = new NormalizedNodeOutputStreamWriter(out);
  37             NormalizedNodeWriter.forStreamWriter(streamWriter).write(node);
  38             streamWriter.writeYangInstanceIdentifier(path);
  39         } catch (IOException e) {
  40             throw new IllegalArgumentException(String.format("Error serializing path {} and Node {}",
  41                     path, node), e);
  42         }
  43     }
  44
  45     public static <T> void deserializePathAndNode(DataInput in, T instance, Applier<T> applier) {
  46         try {
  47             NormalizedNodeInputStreamReader streamReader = new NormalizedNodeInputStreamReader(in);
  48             NormalizedNode<?, ?> node = streamReader.readNormalizedNode();
  49             YangInstanceIdentifier path = streamReader.readYangInstanceIdentifier();
  50             applier.apply(instance, path, node);
  51         } catch (IOException e) {
  52             throw new IllegalArgumentException("Error deserializing path and Node", e);
  53         }
  54     }
  55
  56     public static void serializeNormalizedNode(NormalizedNode<?, ?> node, DataOutput out) {
  57         try {
  58             out.writeBoolean(node != null);
  59             if(node != null) {
  60                 NormalizedNodeOutputStreamWriter streamWriter = new NormalizedNodeOutputStreamWriter(out);
  61                 NormalizedNodeWriter.forStreamWriter(streamWriter).write(node);
  62             }
  63         } catch (IOException e) {
  64             throw new IllegalArgumentException(String.format("Error serializing NormalizedNode {}",
  65                     node), e);
  66         }
  67     }
  68
  69     public static NormalizedNode<?, ?> deserializeNormalizedNode(DataInput in) {
  70             try {
  71                 boolean present = in.readBoolean();
  72                 if(present) {
  73                     NormalizedNodeInputStreamReader streamReader = new NormalizedNodeInputStreamReader(in);
  74                     return streamReader.readNormalizedNode();
  75                 }
  76             } catch (IOException e) {
  77                 throw new IllegalArgumentException("Error deserializing NormalizedNode", e);
  78             }
  79
  80         return null;
  81     }
  82
  83     public static void serializePath(YangInstanceIdentifier path, DataOutput out) {
  84         Preconditions.checkNotNull(path);
  85         try {
  86             NormalizedNodeOutputStreamWriter streamWriter = new NormalizedNodeOutputStreamWriter(out);
  87             streamWriter.writeYangInstanceIdentifier(path);
  88         } catch (IOException e) {
  89             throw new IllegalArgumentException(String.format("Error serializing path {}", path), e);
  90         }
  91     }
  92
  93     public static YangInstanceIdentifier deserializePath(DataInput in) {
  94         try {
  95             NormalizedNodeInputStreamReader streamReader = new NormalizedNodeInputStreamReader(in);
  96             return streamReader.readYangInstanceIdentifier();
  97         } catch (IOException e) {
  98             throw new IllegalArgumentException("Error deserializing path", e);
  99         }
 100     }
 101 }