*/
package org.opendaylight.yangtools.yang.data.api.schema.tree;
-import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier.PathArgument;
-import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
-
import com.google.common.base.Optional;
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
+import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
/**
* A single node within a {@link DataTreeCandidate}. The nodes are organized
* tree restricted to the modified nodes.
*/
public interface DataTreeCandidateNode {
+
/**
* Get the node identifier.
*
* @return The node identifier.
*/
- PathArgument getIdentifier();
+ @Nonnull PathArgument getIdentifier();
/**
* Get an unmodifiable iterable of modified child nodes.
*
* @return Unmodifiable iterable of modified child nodes.
*/
- Iterable<DataTreeCandidateNode> getChildNodes();
+ @Nonnull Iterable<DataTreeCandidateNode> getChildNodes();
+
+ /**
+ * Returns modified child or null if child was not modified
+ * / does not exists.
+ *
+ * @param identifier Identifier of child node
+ * @return Modified child or null if child was not modified.
+ */
+ @Nullable DataTreeCandidateNode getModifiedChild(PathArgument identifier);
/**
* Return the type of modification this node is undergoing.
*
* @return Node modification type.
*/
- ModificationType getModificationType();
+ @Nonnull ModificationType getModificationType();
/**
* Return the before-image of data corresponding to the node.