HONEYCOMB-350 - APPEAR/DISAPPEAR modification handling

Allows these types of modifications to check in depth,
to see if some of their children nodes were not modified

Change-Id: Ice2f988732c2d9ecad8e960c4f10d01863fb0cfd
Signed-off-by: Jan Srnicek <jsrnicek@cisco.com>

1 files changed, 105 insertions, 0 deletions

diff --git a/infra/data-impl/src/main/java/io/fd/honeycomb/data/impl/NormalizedNodeUpdate.java b/infra/data-impl/src/main/java/io/fd/honeycomb/data/impl/NormalizedNodeUpdate.java
new file mode 100644
index 000000000..bfc8a1e2c
--- /dev/null
+++ b/infra/data-impl/src/main/java/io/fd/honeycomb/data/impl/NormalizedNodeUpdate.java
@@ -0,0 +1,105 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.fd.honeycomb.data.impl;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
+import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
+
+/**
+ * Update to a normalized node identifiable by its {@link YangInstanceIdentifier}.
+ */
+final class NormalizedNodeUpdate {
+
+    @Nonnull
+    private final YangInstanceIdentifier id;
+    @Nullable
+    private final NormalizedNode<?, ?> dataBefore;
+    @Nullable
+    private final NormalizedNode<?, ?> dataAfter;
+
+    NormalizedNodeUpdate(@Nonnull final YangInstanceIdentifier id,
+                         @Nullable final NormalizedNode<?, ?> dataBefore,
+                         @Nullable final NormalizedNode<?, ?> dataAfter) {
+        this.id = checkNotNull(id);
+        this.dataAfter = dataAfter;
+        this.dataBefore = dataBefore;
+    }
+
+    @Nullable
+    public NormalizedNode<?, ?> getDataBefore() {
+        return dataBefore;
+    }
+
+    @Nullable
+    public NormalizedNode<?, ?> getDataAfter() {
+        return dataAfter;
+    }
+
+    @Nonnull
+    public YangInstanceIdentifier getId() {
+        return id;
+    }
+
+    static NormalizedNodeUpdate create(@Nonnull final Modification modification) {
+        final com.google.common.base.Optional<NormalizedNode<?, ?>> beforeData =
+                modification.getDataBefore();
+        final com.google.common.base.Optional<NormalizedNode<?, ?>> afterData =
+                modification.getDataAfter();
+        checkArgument(beforeData.isPresent() || afterData.isPresent(),
+                "Both before and after data are null for %s", modification.getId());
+        return NormalizedNodeUpdate.create(modification.getId(), beforeData.orNull(), afterData.orNull());
+    }
+
+    static NormalizedNodeUpdate create(@Nonnull final YangInstanceIdentifier id,
+                                       @Nullable final NormalizedNode<?, ?> dataBefore,
+                                       @Nullable final NormalizedNode<?, ?> dataAfter) {
+        return new NormalizedNodeUpdate(id, dataBefore, dataAfter);
+    }
+
+    @Override
+    public boolean equals(final Object other) {
+        if (this == other) {
+            return true;
+        }
+        if (other == null || getClass() != other.getClass()) {
+            return false;
+        }
+
+        final NormalizedNodeUpdate that = (NormalizedNodeUpdate) other;
+
+        return id.equals(that.id);
+
+    }
+
+    @Override
+    public int hashCode() {
+        return id.hashCode();
+    }
+
+    @Override
+    public String toString() {
+        return "NormalizedNodeUpdate{" + "id=" + id
+                + ", dataBefore=" + dataBefore
+                + ", dataAfter=" + dataAfter
+                + '}';
+    }
+}