yang/yang-data-operations/src/main/java/org/opendaylight/yangtools/yang/data/operations/LeafSetNodeModification.java

   1 /*
   2  * Copyright (c) 2013 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.yangtools.yang.data.operations;
   9
  10 import java.util.List;
  11
  12 import org.opendaylight.yangtools.yang.data.api.schema.LeafSetEntryNode;
  13 import org.opendaylight.yangtools.yang.data.api.schema.LeafSetNode;
  14 import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
  15 import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.ListNodeBuilder;
  16 import org.opendaylight.yangtools.yang.model.api.LeafListSchemaNode;
  17
  18 import com.google.common.base.Optional;
  19 import com.google.common.collect.Iterables;
  20 import com.google.common.collect.Lists;
  21
  22 final class LeafSetNodeModification implements Modification<LeafListSchemaNode, LeafSetNode<?>> {
  23
  24     @Override
  25     public Optional<LeafSetNode<?>> modify(LeafListSchemaNode schema, Optional<LeafSetNode<?>> actual,
  26             Optional<LeafSetNode<?>> modification, OperationStack operationStack) throws DataModificationException {
  27
  28         List<LeafSetEntryNode<?>> resultNodes = Lists.newArrayList();
  29         if(actual.isPresent()) {
  30             Iterables.addAll(resultNodes, actual.get().getValue());
  31         }
  32
  33         // TODO implement ordering for modification nodes
  34
  35         for (LeafSetEntryNode<?> leafListModification : modification.get().getValue()) {
  36             operationStack.enteringNode(leafListModification);
  37
  38             switch (operationStack.getCurrentOperation()) {
  39                 case MERGE:
  40                 case CREATE: {
  41                     DataModificationException.DataExistsException.check(schema.getQName(), actual, leafListModification);
  42                 }
  43                 case REPLACE: {
  44                     if (contains(actual, leafListModification) == false) {
  45                         resultNodes.add(leafListModification);
  46                     }
  47                     break;
  48                 }
  49                 case DELETE: {
  50                     DataModificationException.DataMissingException.check(schema.getQName(), actual, leafListModification);
  51                 }
  52                 case REMOVE: {
  53                     if (resultNodes.contains(leafListModification)) {
  54                         resultNodes.remove(leafListModification);
  55                     }
  56                     break;
  57                 }
  58                 case NONE: {
  59                     break;
  60                 }
  61                 default:
  62                     throw new UnsupportedOperationException(String.format("Unable to perform operation: %s on: %s, unknown", operationStack.getCurrentOperation(), schema));
  63             }
  64
  65             operationStack.exitingNode(leafListModification);
  66         }
  67         return build(schema, resultNodes);
  68     }
  69
  70     private Optional<LeafSetNode<?>> build(LeafListSchemaNode schemaNode, List<LeafSetEntryNode<?>> resultNodes) {
  71         if(resultNodes.isEmpty())
  72             return Optional.absent();
  73
  74         ListNodeBuilder<Object, LeafSetEntryNode<Object>> b = Builders.leafSetBuilder(schemaNode);
  75         for (LeafSetEntryNode<?> resultNode : resultNodes) {
  76             // FIXME: can we do something about this SuppressWarnings?
  77             @SuppressWarnings("unchecked")
  78             final LeafSetEntryNode<Object> child = (LeafSetEntryNode<Object>) resultNode;
  79             b.withChild(child);
  80         }
  81
  82         return Optional.<LeafSetNode<?>>of(b.build());
  83     }
  84
  85     private static boolean contains(Optional<LeafSetNode<?>> actual, LeafSetEntryNode<?> leafListModification) {
  86         boolean contains = actual.isPresent();
  87         contains &= actual.get().getChild(leafListModification.getIdentifier()).isPresent();
  88
  89         return contains;
  90     }
  91 }