Implement edit-config operations for NormalizedNode yang-data-api

[yangtools.git] / yang / yang-data-operations / src / main / java / org / opendaylight / yangtools / yang / data / operations / LeafNodeModification.java

diff --git a/yang/yang-data-operations/src/main/java/org/opendaylight/yangtools/yang/data/operations/LeafNodeModification.java b/yang/yang-data-operations/src/main/java/org/opendaylight/yangtools/yang/data/operations/LeafNodeModification.java
new file mode 100644 (file)
index 0000000..39990a5
--- /dev/null
+++ b/yang/yang-data-operations/src/main/java/org/opendaylight/yangtools/yang/data/operations/LeafNodeModification.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2013 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.operations;
+
+import org.opendaylight.yangtools.yang.data.api.schema.LeafNode;
+import org.opendaylight.yangtools.yang.model.api.LeafSchemaNode;
+
+import com.google.common.base.Optional;
+
+final class LeafNodeModification implements Modification<LeafSchemaNode, LeafNode<?>> {
+
+    @Override
+    public Optional<LeafNode<?>> modify(LeafSchemaNode schema, Optional<LeafNode<?>> actualNode,
+                                    Optional<LeafNode<?>> modificationNode, OperationStack operationStack) throws DataModificationException {
+
+        operationStack.enteringNode(modificationNode);
+
+        Optional<LeafNode<?>> result;
+
+        // Returns either actual node, modification node or empty in case of removal
+        switch (operationStack.getCurrentOperation()) {
+            case MERGE: {
+                result = modificationNode.isPresent() ? modificationNode : actualNode;
+                break;
+            }
+            case CREATE: {
+                DataModificationException.DataExistsException.check(schema.getQName(), actualNode, null);
+            }
+            case REPLACE: {
+                result = modificationNode;
+                break;
+            }
+            case DELETE: {
+                DataModificationException.DataMissingException.check(schema.getQName(), actualNode);
+            }
+            case REMOVE: {
+                result = Optional.absent();
+                break;
+            }
+            case NONE: {
+                result = actualNode;
+                break;
+            }
+            default:
+                throw new UnsupportedOperationException(String.format("Unable to perform operation: %s on: %s, unknown", operationStack.getCurrentOperation(), schema));
+
+        }
+
+        operationStack.exitingNode(modificationNode);
+
+        return result;
+    }
+}