Document StoreTreeNode.getChild() nullness

[yangtools.git] / yang / yang-data-api / src / main / java / org / opendaylight / yangtools / yang / data / api / schema / tree / EmptyDataTreeCandidateNode.java

diff --git a/yang/yang-data-api/src/main/java/org/opendaylight/yangtools/yang/data/api/schema/tree/EmptyDataTreeCandidateNode.java b/yang/yang-data-api/src/main/java/org/opendaylight/yangtools/yang/data/api/schema/tree/EmptyDataTreeCandidateNode.java
index bd5a95fa232f33dad994dee0d289663d9cbb657d..b77f5c0654d4d4e44e74a6969f8e135921ba36ca 100644 (file)
--- a/yang/yang-data-api/src/main/java/org/opendaylight/yangtools/yang/data/api/schema/tree/EmptyDataTreeCandidateNode.java
+++ b/yang/yang-data-api/src/main/java/org/opendaylight/yangtools/yang/data/api/schema/tree/EmptyDataTreeCandidateNode.java
@@ -7,10 +7,11 @@
  */
 package org.opendaylight.yangtools.yang.data.api.schema.tree;
 
-import com.google.common.base.Optional;
-import com.google.common.base.Preconditions;
+import static java.util.Objects.requireNonNull;
+
 import com.google.common.collect.ImmutableList;
 import java.util.Collection;
+import java.util.Optional;
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
@@ -21,7 +22,7 @@ final class EmptyDataTreeCandidateNode implements DataTreeCandidateNode {
     private final PathArgument identifier;
 
     EmptyDataTreeCandidateNode(final PathArgument identifier) {
-        this.identifier = Preconditions.checkNotNull(identifier, "Identifier should not be null");
+        this.identifier = requireNonNull(identifier, "Identifier should not be null");
     }
 
     @Nonnull
@@ -38,7 +39,7 @@ final class EmptyDataTreeCandidateNode implements DataTreeCandidateNode {
 
     @Nullable
     @Override
-    public DataTreeCandidateNode getModifiedChild(final PathArgument identifier) {
+    public DataTreeCandidateNode getModifiedChild(final PathArgument childIdentifier) {
         return null;
     }
 
@@ -51,12 +52,12 @@ final class EmptyDataTreeCandidateNode implements DataTreeCandidateNode {
     @Nonnull
     @Override
     public Optional<NormalizedNode<?, ?>> getDataAfter() {
-        return Optional.absent();
+        return Optional.empty();
     }
 
     @Nonnull
     @Override
     public Optional<NormalizedNode<?, ?>> getDataBefore() {
-        return Optional.absent();
+        return Optional.empty();
     }
 }
\ No newline at end of file