Supporting PNFD (SOL001) mapping to Internal AID model

This maps the PNF descriptor containing etsi defined types
according to SOL001 v2.5.1 to openecomp internal model. The
transformation is done in the "Create VSP" stage. As the main
PNF type gets mapped to the outer container in internal ecomp
model, it is possible to have no "resource instances" when
importing the PNF model into the catalog. The code was updated
to allow this for PNFs.

Change-Id: I961e91746ca638d858dd468e6c82aeb57993f7a3
Issue-ID: SDC-1976
Issue-ID: SDC-2160
Signed-off-by: dermot123 <dermot.melia@est.tech>

1 files changed, 147 insertions, 0 deletions

diff --git a/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-core/src/main/java/org/openecomp/core/impl/ToscaSolConverterPnf.java b/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-core/src/main/java/org/openecomp/core/impl/ToscaSolConverterPnf.java
new file mode 100644
index 0000000000..0258b42a3d
--- /dev/null
+++ b/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-core/src/main/java/org/openecomp/core/impl/ToscaSolConverterPnf.java
@@ -0,0 +1,147 @@
+/*
+ * -
+ *  * ============LICENSE_START=======================================================
+ *  *  Copyright (C) 2019 Nordix Foundation.
+ *  * ================================================================================
+ *  * 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.
+ *  *
+ *  * SPDX-License-Identifier: Apache-2.0
+ *  * ============LICENSE_END=========================================================
+ *
+ */
+
+package org.openecomp.core.impl;
+
+import org.apache.commons.collections.MapUtils;
+import org.onap.sdc.tosca.datatypes.model.NodeTemplate;
+import org.onap.sdc.tosca.datatypes.model.ServiceTemplate;
+import org.onap.sdc.tosca.datatypes.model.TopologyTemplate;
+import org.openecomp.core.converter.ServiceTemplateReaderService;
+import org.openecomp.sdc.tosca.services.DataModelUtil;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.stream.Collectors;
+
+public class ToscaSolConverterPnf extends AbstractToscaSolConverter {
+
+    private static final String PNF_EXT_CP_TYPE = "tosca.nodes.nfv.PnfExtCp";
+    private static final String EXT_CP_TYPE = "org.openecomp.resource.cp.v2.extCP";
+    private static final String LAYER_PROTOCOLS = "layer_protocols";
+    private static final String IP_V4 = "ipv4";
+    private static final String IP_V6 = "ipv6";
+    private static final String IP_VERSION = "ip_version";
+    private static final String ASSIGNMENT_METHOD = "assingment_method";
+    private static final String DHCP = "dhcp";
+
+    /**
+     * For PNF the node templates are converted ETSI node types to ecomp node types
+     * All other data i.e. inputs, substitution mappings and outputs are simply dropped at this stage. The equivalent
+     * ecomp data will be added when the vsp is imported into the catalog.
+     * @param serviceTemplate
+     * @param readerService
+     */
+    @Override
+    public void convertTopologyTemplate(ServiceTemplate serviceTemplate, ServiceTemplateReaderService readerService) {
+        convertNodeTemplatesToEcompTypes(serviceTemplate, readerService);
+        addEmptyNodeTemplatesIfNoneDefined(serviceTemplate);
+    }
+
+    /**
+     * PNF only has nfv.PNF and nfv.PnfExtCp types defined in ETSI SOL001 v2.5.1.
+     * - The PNF is mapped to the outer Abstract PNF container in ecomp model and hence nfv.PNF is dropped here.
+     * - nfv.PnfExtCp is mapped to ecomp v2.extCp type.
+     *
+     * @param serviceTemplate
+     * @param readerService
+     */
+    private void convertNodeTemplatesToEcompTypes(ServiceTemplate serviceTemplate,
+                                                  ServiceTemplateReaderService readerService) {
+        Map<String, Object> nodeTemplates = readerService.getNodeTemplates();
+        if (MapUtils.isEmpty(nodeTemplates)) {
+            return;
+        }
+
+        for (Map.Entry<String, Object> nodeTemplateEntry : nodeTemplates.entrySet()) {
+            Map<String, Object> inputNodeTemplate = (Map<String, Object>) nodeTemplateEntry.getValue();
+            if (PNF_EXT_CP_TYPE.equals((String) inputNodeTemplate.get("type"))) {
+                NodeTemplate nodeTemplate = convertToEcompConnectionPointNodeType(inputNodeTemplate);
+                DataModelUtil.addNodeTemplate(serviceTemplate, nodeTemplateEntry.getKey(), nodeTemplate);
+            }
+        }
+        addEmptyNodeTemplatesIfNoneDefined(serviceTemplate);
+    }
+
+
+    /**
+     * Converts from the ETSI PnfExtCp node type to ecomp v2.extCP node type
+     * The following properties are mapped
+     * - layer_protocols is mapped to ip_requirements if it contains the values ipv4 and/or ipv6
+     * <p>
+     * All other data e.g. remaining properties, requirements, capabilities are
+     * not mapped over to ecomp equivalent
+     *
+     * @param pnfExtCp
+     * @return ecomp v2.extCP node type
+     */
+    private NodeTemplate convertToEcompConnectionPointNodeType(Map<String, Object> pnfExtCp) {
+        NodeTemplate nodeTemplate = new NodeTemplate();
+        nodeTemplate.setType(EXT_CP_TYPE);
+        Map<String, Object> properties = (Map<String, Object>) pnfExtCp.get("properties");
+        for (Map.Entry<String, Object> property : properties.entrySet()) {
+            final String propertyName = property.getKey();
+            if (LAYER_PROTOCOLS.equals(propertyName)) {
+                List<Map<String, Object>> ipRequirements = convertToIpRequirementsProperty((List<String>) property.getValue());
+                if (isNotEmpty(ipRequirements)) {
+                    Map<String, Object> convertedProperties = new HashMap<>();
+                    convertedProperties.put("ip_requirements", ipRequirements);
+                    nodeTemplate.setProperties(convertedProperties);
+                }
+            }
+        }
+        return nodeTemplate;
+    }
+
+    private List<Map<String, Object>> convertToIpRequirementsProperty(List<String> layerProtocols) {
+        return layerProtocols.stream()
+                .filter(layerProtocol -> IP_V4.equals(layerProtocol) || IP_V6.equals(layerProtocol))
+                .map(this::createIpPropertyElement)
+                .collect(Collectors.toList());
+    }
+
+    private Map<String, Object> createIpPropertyElement(String ipVersion) {
+        final int version = ipVersion.equals(IP_V4) ? 4 : 6;
+        Map<String, Object> result = new HashMap<>();
+        result.put(IP_VERSION, version);
+        result.put(ASSIGNMENT_METHOD, DHCP);
+        return result;
+    }
+
+    private boolean isNotEmpty(List<?> list) {
+        return !list.isEmpty();
+    }
+
+    private void addEmptyNodeTemplatesIfNoneDefined(ServiceTemplate serviceTemplate) {
+        TopologyTemplate topologyTemplate = serviceTemplate.getTopology_template();
+        if (Objects.isNull(topologyTemplate)) {
+            topologyTemplate = new TopologyTemplate();
+            serviceTemplate.setTopology_template(topologyTemplate);
+        }
+        if (topologyTemplate.getNode_templates() == null) {
+            topologyTemplate.setNode_templates(new HashMap<>());
+        }
+    }
+
+}
\ No newline at end of file