BUG-2882: implement DataTreeModificationCursor

[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 9c0bd584351ced92a98c741c570d9a8e716013a1..c4cec22944fd0a4fd8bb2c28d12f06b9b4505d4b 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
@@ -1,17 +1,24 @@
+/*
+ * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
 package org.opendaylight.yangtools.yang.data.impl.schema.tree;
 
-
-import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier;
+import com.google.common.base.Optional;
+import com.google.common.base.Preconditions;
+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.tree.DataTreeSnapshot;
+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.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.data.impl.schema.NormalizedNodeUtils;
 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
 
-import com.google.common.base.Optional;
-import com.google.common.base.Preconditions;
-
-final class InMemoryDataTreeSnapshot implements DataTreeSnapshot {
+final class InMemoryDataTreeSnapshot extends AbstractCursorAware implements CursorAwareDataTreeSnapshot {
     private final RootModificationApplyOperation applyOper;
     private final SchemaContext schemaContext;
     private final TreeNode rootNode;
@@ -32,8 +39,8 @@ final class InMemoryDataTreeSnapshot implements DataTreeSnapshot {
     }
 
     @Override
-    public Optional<NormalizedNode<?, ?>> readNode(final InstanceIdentifier path) {
-        return NormalizedNodeUtils.findNode(rootNode.getData(), path);
+    public Optional<NormalizedNode<?, ?>> readNode(final YangInstanceIdentifier path) {
+        return NormalizedNodes.findNode(rootNode.getData(), path);
     }
 
     @Override
@@ -41,9 +48,20 @@ final class InMemoryDataTreeSnapshot implements DataTreeSnapshot {
         return new InMemoryDataTreeModification(this, applyOper);
     }
 
+    @Override
+    public DataTreeSnapshotCursor createCursor(final YangInstanceIdentifier path) {
+        final Optional<NormalizedNode<?, ?>> maybeRoot = NormalizedNodes.findNode(rootNode.getData(), path);
+        if (!maybeRoot.isPresent()) {
+            return null;
+        }
+
+        final NormalizedNode<?, ?> root = maybeRoot.get();
+        Preconditions.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();
     }
-
 }
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