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 java.util.ArrayList;
  11 import java.util.Iterator;
  12 import java.util.List;
  13 import java.util.concurrent.ExecutionException;
  14
  15 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  16 import org.opendaylight.controller.md.sal.common.impl.util.compat.DataNormalizationException;
  17 import org.opendaylight.controller.md.sal.common.impl.util.compat.DataNormalizationOperation;
  18 import org.opendaylight.controller.md.sal.dom.api.DOMDataReadWriteTransaction;
  19 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  20 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
  21 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  22 import org.slf4j.Logger;
  23 import org.slf4j.LoggerFactory;
  24
  25 import com.google.common.base.Optional;
  26
  27 public class AbstractReadWriteTransaction extends AbstractWriteTransaction<DOMDataReadWriteTransaction> {
  28
  29     private static final Logger LOG = LoggerFactory.getLogger(AbstractReadWriteTransaction.class);
  30
  31     public AbstractReadWriteTransaction(final DOMDataReadWriteTransaction delegate, final BindingToNormalizedNodeCodec codec) {
  32         super(delegate, codec);
  33     }
  34
  35     @Override
  36     protected final void ensureParentsByMerge(final LogicalDatastoreType store,
  37             final org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier normalizedPath,
  38             final InstanceIdentifier<?> path) {
  39         List<PathArgument> currentArguments = new ArrayList<>();
  40         DataNormalizationOperation<?> currentOp = getCodec().getDataNormalizer().getRootOperation();
  41         Iterator<PathArgument> iterator = normalizedPath.getPathArguments().iterator();
  42         while (iterator.hasNext()) {
  43             PathArgument currentArg = iterator.next();
  44             try {
  45                 currentOp = currentOp.getChild(currentArg);
  46             } catch (DataNormalizationException e) {
  47                 throw new IllegalArgumentException(String.format("Invalid child encountered in path %s", path), e);
  48             }
  49             currentArguments.add(currentArg);
  50             org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier currentPath = org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.create(
  51                     currentArguments);
  52
  53             final Optional<NormalizedNode<?, ?>> d;
  54             try {
  55                 d = getDelegate().read(store, currentPath).get();
  56             } catch (InterruptedException | ExecutionException e) {
  57                 LOG.error("Failed to read pre-existing data from store {} path {}", store, currentPath, e);
  58                 throw new IllegalStateException("Failed to read pre-existing data", e);
  59             }
  60
  61             if (!d.isPresent() && iterator.hasNext()) {
  62                 getDelegate().merge(store, currentPath, currentOp.createDefault(currentArg));
  63             }
  64         }
  65     }
  66
  67
  68 }