binding/mdsal-binding-dom-adapter/src/main/java/org/opendaylight/mdsal/binding/dom/adapter/LazyDataTreeModification.java

   1 /*
   2  * Copyright (c) 2015 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.mdsal.binding.dom.adapter;
   9
  10 import com.google.common.base.MoreObjects;
  11 import com.google.common.base.Preconditions;
  12 import java.util.ArrayList;
  13 import java.util.Collection;
  14 import java.util.List;
  15 import java.util.Map.Entry;
  16 import org.opendaylight.mdsal.binding.api.DataObjectModification;
  17 import org.opendaylight.mdsal.binding.api.DataTreeIdentifier;
  18 import org.opendaylight.mdsal.binding.api.DataTreeModification;
  19 import org.opendaylight.mdsal.binding.dom.codec.api.BindingCodecTreeNode;
  20 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  21 import org.opendaylight.mdsal.dom.api.DOMDataTreeCandidate;
  22 import org.opendaylight.yangtools.yang.binding.DataObject;
  23 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  24 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
  25
  26 /**
  27  * Lazily translated {@link DataTreeModification} based on {@link DataTreeCandidate}.
  28  *
  29  * <p>
  30  * {@link DataTreeModification} represents Data tree change event,
  31  * but whole tree is not translated or resolved eagerly, but only child nodes
  32  * which are directly accessed by user of data object modification.
  33  *
  34  */
  35 class LazyDataTreeModification<T extends DataObject> implements DataTreeModification<T> {
  36
  37     private final DataTreeIdentifier<T> path;
  38     private final DataObjectModification<T> rootNode;
  39
  40     LazyDataTreeModification(final DataTreeIdentifier<T> path, final DataObjectModification<T> modification) {
  41         this.path = Preconditions.checkNotNull(path);
  42         this.rootNode = Preconditions.checkNotNull(modification);
  43     }
  44
  45     @SuppressWarnings({"unchecked", "rawtypes"})
  46     static <T extends DataObject> DataTreeModification<T> create(final BindingToNormalizedNodeCodec codec,
  47             final DataTreeCandidate domChange, final LogicalDatastoreType datastoreType) {
  48         final Entry<InstanceIdentifier<?>, BindingCodecTreeNode<?>> codecCtx =
  49                 codec.getSubtreeCodec(domChange.getRootPath());
  50         final DataTreeIdentifier<?> path = DataTreeIdentifier.create(datastoreType, codecCtx.getKey());
  51         final DataObjectModification<?> modification =
  52                 LazyDataObjectModification.create(codecCtx.getValue(), domChange.getRootNode());
  53         return new LazyDataTreeModification(path, modification);
  54     }
  55
  56     @SuppressWarnings({"unchecked", "rawtypes"})
  57     static <T extends DataObject> DataTreeModification<T> create(final BindingToNormalizedNodeCodec codec,
  58             final DOMDataTreeCandidate candidate) {
  59         final Entry<InstanceIdentifier<?>, BindingCodecTreeNode<?>> codecCtx =
  60                 codec.getSubtreeCodec(candidate.getRootPath().getRootIdentifier());
  61         final DataTreeIdentifier<?> path =
  62                 DataTreeIdentifier.create(candidate.getRootPath().getDatastoreType(), codecCtx.getKey());
  63         final DataObjectModification<?> modification =
  64                 LazyDataObjectModification.create(codecCtx.getValue(), candidate.getRootNode());
  65         return new LazyDataTreeModification(path, modification);
  66     }
  67
  68     static <T extends DataObject> Collection<DataTreeModification<T>> from(final BindingToNormalizedNodeCodec codec,
  69             final Collection<DataTreeCandidate> domChanges, final LogicalDatastoreType datastoreType) {
  70         final List<DataTreeModification<T>> result = new ArrayList<>(domChanges.size());
  71         for (final DataTreeCandidate domChange : domChanges) {
  72             result.add(LazyDataTreeModification.create(codec, domChange, datastoreType));
  73         }
  74         return result;
  75     }
  76
  77     @Override
  78     public DataObjectModification<T> getRootNode() {
  79         return rootNode;
  80     }
  81
  82     @Override
  83     public DataTreeIdentifier<T> getRootPath() {
  84         return path;
  85     }
  86
  87     @Override
  88     public String toString() {
  89         return MoreObjects.toStringHelper(this).add("path", path).add("rootNode", rootNode).toString();
  90     }
  91 }