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/*
* Copyright 2016-2017, Nokia Corporation
*
* 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 org.onap.vfc.nfvo.driver.vnfm.svnfm.nokia.packagetransformer;
import com.google.common.annotations.VisibleForTesting;
import com.google.gson.Gson;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import java.util.HashMap;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.Set;
import java.util.regex.Pattern;
import org.slf4j.Logger;
import org.yaml.snakeyaml.Yaml;
import static org.onap.vfc.nfvo.driver.vnfm.svnfm.nokia.util.CbamUtils.child;
import static org.onap.vfc.nfvo.driver.vnfm.svnfm.nokia.util.CbamUtils.childElement;
import static org.slf4j.LoggerFactory.getLogger;
/**
* Generic non ONAP version dependent package conversion
*/
abstract class OnapAbstractVnfdBuilder {
public static final String DESCRIPTION = "description";
public static final String PROPERTIES = "properties";
public static final String REQUIREMENTS = "requirements";
private static Logger logger = getLogger(OnapAbstractVnfdBuilder.class);
@VisibleForTesting
static String indent(String content, int prefixSize) {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < prefixSize; i++) {
sb.append(" ");
}
Pattern pattern = Pattern.compile("^(.*)$", Pattern.MULTILINE);
return pattern.matcher(content).replaceAll(sb.toString() + "$1");
}
protected static String getRequirement(JsonArray requirements, String key) {
for (int i = 0; i < requirements.size(); i++) {
JsonElement requirement = requirements.get(i);
Map.Entry<String, JsonElement> next = requirement.getAsJsonObject().entrySet().iterator().next();
String s = next.getKey();
if (key.equals(s)) {
return next.getValue().getAsString();
}
}
return null;
}
protected JsonElement get(String name, Set<Map.Entry<String, JsonElement>> nodes) {
for (Map.Entry<String, JsonElement> node : nodes) {
if (name.equals(node.getKey())) {
return node.getValue();
}
}
throw new NoSuchElementException("The VNFD does not have a node called " + name + " but required by an other node");
}
protected String buildEcp(String name, JsonElement ecp, Set<Map.Entry<String, JsonElement>> nodes) {
if (ecp.getAsJsonObject().has(REQUIREMENTS)) {
String icpName = getRequirement(ecp.getAsJsonObject().get(REQUIREMENTS).getAsJsonArray(), "internal_connection_point");
if (icpName != null) {
return buildEcpInternal(name, icpName, nodes);
} else {
logger.warn("The {} ecp does not have an internal connection point", name);
}
} else {
logger.warn("The {} ecp does not have an requirements section", name);
}
return "";
}
private String buildEcpInternal(String ecpName, String icpName, Set<Map.Entry<String, JsonElement>> nodes) {
JsonObject icpNode = get(icpName, nodes).getAsJsonObject();
if (icpNode.has(REQUIREMENTS)) {
String vdu = getRequirement(icpNode.getAsJsonObject().get(REQUIREMENTS).getAsJsonArray(), "virtual_binding");
//internal connection point is bound to VDU
if (vdu != null) {
return buildVduCpd(ecpName, vdu, child(icpNode, PROPERTIES));
} else {
logger.warn("The {} internal connection point of the {} ecp does not have a VDU", icpName, ecpName);
}
} else {
logger.warn("The {} internal connection point of the {} ecp does not have a requirements section", icpName, ecpName);
}
return "";
}
/**
* @param cbamVnfd the CBAM VNFD
* @return the converted ONAP VNFD
*/
public String toOnapVnfd(String cbamVnfd) {
JsonObject root = new Gson().toJsonTree(new Yaml().load(cbamVnfd)).getAsJsonObject();
JsonObject topologyTemplate = child(root, "topology_template");
JsonObject substitution_mappings = child(topologyTemplate, "substitution_mappings");
Map<String, JsonElement> virtualLinks = new HashMap<>();
if (topologyTemplate.has("node_templates")) {
Set<Map.Entry<String, JsonElement>> nodeTemplates = child(topologyTemplate, "node_templates").entrySet();
StringBuilder body = new StringBuilder();
for (Map.Entry<String, JsonElement> node : nodeTemplates) {
String type = childElement(node.getValue().getAsJsonObject(), "type").getAsString();
if ("tosca.nodes.nfv.VDU".equals(type)) {
body.append(buildVdu(node.getKey(), substitution_mappings, node.getValue().getAsJsonObject(), nodeTemplates));
} else if ("tosca.nodes.nfv.VirtualStorage".equals(type)) {
body.append(buildVolume(node.getKey(), node.getValue().getAsJsonObject()));
} else if ("tosca.nodes.nfv.VL".equals(type)) {
virtualLinks.put(node.getKey(), node.getValue());
body.append(buildVl(node.getValue().getAsJsonObject().get(PROPERTIES).getAsJsonObject(), node.getKey()));
} else if ("tosca.nodes.nfv.ICP".equals(type)) {
body.append(buildIcp(node.getKey(), node.getValue().getAsJsonObject()));
} else if ("tosca.nodes.nfv.ECP".equals(type)) {
body.append(buildEcp(node.getKey(), node.getValue(), nodeTemplates));
} else {
logger.warn("The {} type is not converted", type);
}
}
return buildHeader(topologyTemplate, virtualLinks) + body.toString();
}
return buildHeader(topologyTemplate, virtualLinks);
}
abstract protected String buildHeader(JsonObject toplogyTemplate, Map<String, JsonElement> virtualLinks);
abstract protected String buildVduCpd(String name, String vdu, JsonObject properties);
abstract protected String buildVdu(String name, JsonObject vnf, JsonObject vdu, Set<Map.Entry<String, JsonElement>> nodes);
abstract protected String buildIcp(String name, JsonObject icp);
abstract protected String buildVolume(String nodeName, JsonObject volume);
abstract protected String buildVl(JsonObject vlProperties, String name);
}
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