Cleanup use of Guava library

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

diff --git a/yang/yang-data-impl/src/main/java/org/opendaylight/yangtools/yang/data/impl/schema/tree/InMemoryDataTreeSnapshot.java b/yang/yang-data-impl/src/main/java/org/opendaylight/yangtools/yang/data/impl/schema/tree/InMemoryDataTreeSnapshot.java
index 8023c49ab339943aea40b5f7f57d014e075982f2..7cc443281c57f8e22a365643ed7e9e1582312a89 100644 (file)
--- a/yang/yang-data-impl/src/main/java/org/opendaylight/yangtools/yang/data/impl/schema/tree/InMemoryDataTreeSnapshot.java
+++ b/yang/yang-data-impl/src/main/java/org/opendaylight/yangtools/yang/data/impl/schema/tree/InMemoryDataTreeSnapshot.java
@@ -7,25 +7,30 @@
  */
 package org.opendaylight.yangtools.yang.data.impl.schema.tree;
 
-import com.google.common.base.Optional;
-import com.google.common.base.Preconditions;
+import static com.google.common.base.Preconditions.checkArgument;
+import static java.util.Objects.requireNonNull;
+
+import java.util.Optional;
+import javax.annotation.Nonnull;
 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
+import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNodeContainer;
 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNodes;
-import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeSnapshot;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.CursorAwareDataTreeSnapshot;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeSnapshotCursor;
 import org.opendaylight.yangtools.yang.data.api.schema.tree.spi.TreeNode;
 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
 
-final class InMemoryDataTreeSnapshot implements DataTreeSnapshot {
+final class InMemoryDataTreeSnapshot extends AbstractCursorAware implements CursorAwareDataTreeSnapshot {
     private final RootModificationApplyOperation applyOper;
     private final SchemaContext schemaContext;
     private final TreeNode rootNode;
 
     InMemoryDataTreeSnapshot(final SchemaContext schemaContext, final TreeNode rootNode,
             final RootModificationApplyOperation applyOper) {
-        this.schemaContext = Preconditions.checkNotNull(schemaContext);
-        this.rootNode = Preconditions.checkNotNull(rootNode);
-        this.applyOper = Preconditions.checkNotNull(applyOper);
+        this.schemaContext = requireNonNull(schemaContext);
+        this.rootNode = requireNonNull(rootNode);
+        this.applyOper = requireNonNull(applyOper);
     }
 
     TreeNode getRootNode() {
@@ -46,9 +51,20 @@ final class InMemoryDataTreeSnapshot implements DataTreeSnapshot {
         return new InMemoryDataTreeModification(this, applyOper);
     }
 
+    @Override
+    public DataTreeSnapshotCursor createCursor(@Nonnull final YangInstanceIdentifier path) {
+        final Optional<NormalizedNode<?, ?>> maybeRoot = NormalizedNodes.findNode(rootNode.getData(), path);
+        if (!maybeRoot.isPresent()) {
+            return null;
+        }
+
+        final NormalizedNode<?, ?> root = maybeRoot.get();
+        checkArgument(root instanceof NormalizedNodeContainer, "Child %s is not a container", path);
+        return openCursor(new InMemoryDataTreeSnapshotCursor(this, path, (NormalizedNodeContainer<?, ?, ?>)root));
+    }
+
     @Override
     public String toString() {
         return rootNode.getSubtreeVersion().toString();
     }
-
-}
\ No newline at end of file
+}