restconf/sal-rest-connector/src/main/java/org/opendaylight/restconf/restful/utils/TransactionUtil.java

   1 /*
   2  * Copyright (c) 2016 Cisco 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.restconf.restful.utils;
   9
  10 import com.google.common.base.Preconditions;
  11 import java.util.ArrayList;
  12 import java.util.Iterator;
  13 import java.util.List;
  14 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  15 import org.opendaylight.controller.md.sal.dom.api.DOMDataWriteTransaction;
  16 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  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.impl.schema.ImmutableNodes;
  20 import org.opendaylight.yangtools.yang.model.api.ListSchemaNode;
  21 import org.opendaylight.yangtools.yang.model.api.Module;
  22 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  23
  24 /**
  25  * Util class for common methods of transactions
  26  *
  27  */
  28 public final class TransactionUtil {
  29
  30     private TransactionUtil() {
  31         throw new UnsupportedOperationException("Util class");
  32     }
  33
  34     /**
  35      * Merged parents of data
  36      *
  37      * @param path
  38      *            - path of data
  39      * @param schemaContext
  40      *            - {@link SchemaContext}
  41      * @param writeTx
  42      *            - write transaction
  43      */
  44     public static void ensureParentsByMerge(final YangInstanceIdentifier path, final SchemaContext schemaContext,
  45             final DOMDataWriteTransaction writeTx) {
  46         final List<PathArgument> normalizedPathWithoutChildArgs = new ArrayList<>();
  47         boolean hasList = false;
  48         YangInstanceIdentifier rootNormalizedPath = null;
  49
  50         final Iterator<PathArgument> it = path.getPathArguments().iterator();
  51         final Module module = schemaContext.findModuleByNamespaceAndRevision(
  52                 path.getLastPathArgument().getNodeType().getModule().getNamespace(),
  53                 path.getLastPathArgument().getNodeType().getModule().getRevision());
  54
  55         while (it.hasNext()) {
  56             final PathArgument pathArgument = it.next();
  57             if (rootNormalizedPath == null) {
  58                 rootNormalizedPath = YangInstanceIdentifier.create(pathArgument);
  59             }
  60             if (it.hasNext()) {
  61                 normalizedPathWithoutChildArgs.add(pathArgument);
  62                 if (module.getDataChildByName(pathArgument.getNodeType()) instanceof ListSchemaNode) {
  63                     hasList = true;
  64                 }
  65             }
  66         }
  67         if (normalizedPathWithoutChildArgs.isEmpty()) {
  68             return;
  69         }
  70         if (hasList) {
  71             Preconditions.checkArgument(rootNormalizedPath != null, "Empty path received");
  72             final NormalizedNode<?, ?> parentStructure = ImmutableNodes.fromInstanceId(schemaContext,
  73                     YangInstanceIdentifier.create(normalizedPathWithoutChildArgs));
  74             writeTx.merge(LogicalDatastoreType.CONFIGURATION, rootNormalizedPath, parentStructure);
  75         }
  76     }
  77 }