1 files changed, 109 insertions, 0 deletions
diff --git a/infra/test-utils/test-tools/src/main/java/io/fd/honeycomb/test/tools/factories/YangDataFactory.java b/infra/test-utils/test-tools/src/main/java/io/fd/honeycomb/test/tools/factories/YangDataFactory.java
new file mode 100644
index 000000000..ecf556cd2
--- /dev/null
+++ b/infra/test-utils/test-tools/src/main/java/io/fd/honeycomb/test/tools/factories/YangDataFactory.java
@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2016 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.test.tools.factories;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import com.google.common.base.Optional;
+import com.google.common.collect.Iterables;
+import io.fd.honeycomb.translate.util.JsonUtils;
+import java.io.IOException;
+import java.util.AbstractMap;
+import java.util.Map;
+import javax.annotation.Nonnull;
+import org.opendaylight.controller.md.sal.binding.impl.BindingToNormalizedNodeCodec;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
+import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
+import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
+import org.opendaylight.yangtools.yang.data.impl.codec.DeserializationException;
+import org.opendaylight.yangtools.yang.data.util.AbstractModuleStringInstanceIdentifierCodec;
+import org.opendaylight.yangtools.yang.model.api.DataNodeContainer;
+import org.opendaylight.yangtools.yang.model.api.SchemaContext;
+import org.opendaylight.yangtools.yang.model.api.SchemaNode;
+
+/**
+ * Common logic for reading of yang data
+ */
+abstract class YangDataFactory {
+
+    final SchemaContext schemaContext;
+    final BindingToNormalizedNodeCodec serializer;
+    final AbstractModuleStringInstanceIdentifierCodec iidParser;
+
+    YangDataFactory(@Nonnull final SchemaContext schemaContext,
+                    @Nonnull final BindingToNormalizedNodeCodec serializer,
+                    @Nonnull final AbstractModuleStringInstanceIdentifierCodec iidParser) {
+        this.schemaContext = checkNotNull(schemaContext, "SchemaContext cannot be null");
+        this.serializer = checkNotNull(serializer, "Serializer cannot be null");
+        this.iidParser = checkNotNull(iidParser, "Instance identifier parser cannot be null");
+    }
+
+    DataObject getDataForNode(final YangInstanceIdentifier nodeYangIdentifier,
+                              final String resourcePath,
+                              final DataNodeContainer parentSchema)
+            throws DeserializationException, IOException {
+
+        // Reads resources from provided resource path
+        final ContainerNode rootData = getCheckedRootData(resourcePath, parentSchema);
+
+        // Now transform the single child from JSON into BA format
+        final DataContainerChild<? extends YangInstanceIdentifier.PathArgument, ?> actualData =
+                extractCheckedSingleChild(rootData);
+
+        return getCheckedBinding(nodeYangIdentifier, actualData).getValue();
+    }
+
+    private ContainerNode getCheckedRootData(final String resourcePath, final DataNodeContainer parentSchema)
+            throws IOException {
+        // TODO the cast to SchemaNode is dangerous and would not work for Augments, Choices and some other nodes maybe. At least check
+        // TODO not sure if this is true, while testing this code was working fine event while processing choices/cases,
+        // TODO only problem is to find suitable codec that can process cases,etc
+        // Transform JSON into NormalizedNode
+
+        final ContainerNode rootData = JsonUtils.readJson(schemaContext,
+                checkNotNull(this.getClass().getResource(resourcePath), "Unable to find resource %s", resourcePath)
+                        .openStream(), ((SchemaNode) parentSchema));
+
+        checkArgument(rootData.getValue().size() == 1, "Only a single data node is expected in %s, but there were: %s",
+                resourcePath, rootData.getValue());
+        return rootData;
+    }
+
+    private DataContainerChild<? extends YangInstanceIdentifier.PathArgument, ?> extractCheckedSingleChild(
+            final ContainerNode rootData) {
+        // Now transform the single child from JSON into BA format
+        final DataContainerChild<? extends YangInstanceIdentifier.PathArgument, ?> actualData =
+                Iterables.getFirst(rootData.getValue(), null);
+
+        checkNotNull(actualData, "Unable to extract single child from %s", rootData);
+        return actualData;
+    }
+
+    private Map.Entry<InstanceIdentifier<? extends DataObject>, DataObject> getCheckedBinding(
+            final YangInstanceIdentifier nodeYangIdentifier,
+            final DataContainerChild<? extends YangInstanceIdentifier.PathArgument, ?> actualData)
+            throws DeserializationException {
+        final Optional<Map.Entry<InstanceIdentifier<? extends DataObject>, DataObject>> ba =
+                serializer.toBinding(new AbstractMap.SimpleImmutableEntry<>(nodeYangIdentifier, actualData));
+
+        checkArgument(ba.isPresent(), "Unable to convert to binding %s", nodeYangIdentifier);
+        return ba.get();
+    }
+}