opendaylight/md-sal/sal-binding-broker/src/main/java/org/opendaylight/controller/md/sal/binding/impl/AbstractReadWriteTransaction.java

   1 /*
   2  * Copyright (c) 2014 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.controller.md.sal.binding.impl;
   9
  10 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  11 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
  12 import org.opendaylight.controller.md.sal.common.impl.util.compat.DataNormalizationException;
  13 import org.opendaylight.controller.md.sal.common.impl.util.compat.DataNormalizationOperation;
  14 import org.opendaylight.controller.md.sal.dom.api.DOMDataReadWriteTransaction;
  15 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  16 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
  17 import org.slf4j.Logger;
  18 import org.slf4j.LoggerFactory;
  19
  20 import java.util.ArrayList;
  21 import java.util.Iterator;
  22 import java.util.List;
  23
  24 public class AbstractReadWriteTransaction extends AbstractWriteTransaction<DOMDataReadWriteTransaction> {
  25
  26     private static final Logger LOG = LoggerFactory.getLogger(AbstractReadWriteTransaction.class);
  27
  28     public AbstractReadWriteTransaction(final DOMDataReadWriteTransaction delegate, final BindingToNormalizedNodeCodec codec) {
  29         super(delegate, codec);
  30     }
  31
  32     @Override
  33     protected final void ensureParentsByMerge(final LogicalDatastoreType store,
  34             final org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier normalizedPath,
  35             final InstanceIdentifier<?> path) {
  36         List<PathArgument> currentArguments = new ArrayList<>();
  37         DataNormalizationOperation<?> currentOp = getCodec().getDataNormalizer().getRootOperation();
  38         Iterator<PathArgument> iterator = normalizedPath.getPathArguments().iterator();
  39         while (iterator.hasNext()) {
  40             PathArgument currentArg = iterator.next();
  41             try {
  42                 currentOp = currentOp.getChild(currentArg);
  43             } catch (DataNormalizationException e) {
  44                 throw new IllegalArgumentException(String.format("Invalid child encountered in path %s", path), e);
  45             }
  46             currentArguments.add(currentArg);
  47             org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier currentPath = org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.create(
  48                     currentArguments);
  49
  50             final Boolean exists;
  51             try {
  52                 exists = getDelegate().exists(store, currentPath).checkedGet();
  53             } catch (ReadFailedException e) {
  54                 LOG.error("Failed to read pre-existing data from store {} path {}", store, currentPath, e);
  55                 throw new IllegalStateException("Failed to read pre-existing data", e);
  56             }
  57
  58             if (!exists && iterator.hasNext()) {
  59                 getDelegate().merge(store, currentPath, currentOp.createDefault(currentArg));
  60             }
  61         }
  62     }
  63
  64
  65 }