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