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/*-
* ============LICENSE_START=======================================================
* ONAP : APPC
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Copyright (C) 2017 Amdocs
* =============================================================================
* 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.
*
* ECOMP is a trademark and service mark of AT&T Intellectual Property.
* ============LICENSE_END=========================================================
*/
package org.openecomp.appc.yang.impl;
import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;
import org.apache.commons.lang.StringUtils;
import org.apache.velocity.Template;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.VelocityEngine;
import org.apache.velocity.exception.ParseErrorException;
import org.apache.velocity.exception.ResourceNotFoundException;
import org.apache.velocity.runtime.RuntimeConstants;
import org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader;
import org.opendaylight.yangtools.yang.parser.stmt.rfc6020.YangStatementSourceImpl;
import org.openecomp.appc.yang.YANGGenerator;
import org.openecomp.appc.yang.exception.YANGGenerationException;
import org.openecomp.appc.yang.objects.Leaf;
import org.openecomp.appc.yang.type.YangTypes;
import org.openecomp.sdc.tosca.datatypes.model.NodeType;
import org.openecomp.sdc.tosca.datatypes.model.PropertyDefinition;
import org.openecomp.sdc.tosca.datatypes.model.ServiceTemplate;
import org.openecomp.sdc.tosca.services.yamlutil.ToscaExtensionYamlUtil;
import java.io.*;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
@SuppressWarnings("CheckStyle")
public class YANGGeneratorImpl implements YANGGenerator {
private static final EELFLogger Log = EELFManager.getInstance().getLogger(YANGGeneratorImpl.class);
private static final String MODULE_TYPE = "moduleType";
private static final String LEAVES = "leaves";
/* (non-Javadoc)
* @see org.openecomp.appc.yang.YANGGenerator#generateYANG(java.lang.String, java.lang.String, java.io.OutputStream)
*/
@Override
public void generateYANG(String uniqueID, String tosca, OutputStream stream)
throws YANGGenerationException {
Log.info("Entered into generateYANG.");
Log.debug("Received Tosca:\n" + tosca +"\n Received uniqueID: "+uniqueID);
validateInput(uniqueID, tosca, stream);
Map<String,Object> parsedToscaMap = parseTosca(tosca);
String moduleType =parsedToscaMap.get(MODULE_TYPE).toString();
List<Leaf> leaves = (List<Leaf>) parsedToscaMap.get(LEAVES);
VelocityEngine ve = new VelocityEngine();
ve.setProperty(RuntimeConstants.RESOURCE_LOADER, "classpath");
ve.setProperty("classpath.resource.loader.class", ClasspathResourceLoader.class.getName());
ve.init();
Template template;
try {
template = ve.getTemplate("templates/YangTemplate.vm");
} catch ( ResourceNotFoundException | ParseErrorException ex) {
Log.error("Error while retrieving YANG Template", ex);
throw new YANGGenerationException("Error while retrieving YANG Template",ex);
}
VelocityContext vc = new VelocityContext();
vc.put("moduleName", uniqueID);
vc.put(MODULE_TYPE, moduleType);
vc.put(LEAVES, leaves);
StringWriter sw = new StringWriter();
template.merge(vc,sw);
Log.debug("generated YANG \n "+sw.toString());
try {
String yang = sw.toString();
validateYang(yang);
stream.write(yang.getBytes());
stream.flush();
} catch (IOException e) {
Log.error("Error while writing to outputstream", e);
throw new YANGGenerationException("Error writing to outputstream",e);
} finally {
try {
stream.close();
} catch (IOException e) {
Log.error("Error while closing outputstream", e);
}
}
Log.info("exiting generateYANG method.");
}
private void validateYang(String yang) throws YANGGenerationException {
try(InputStream inputYangStream = new ByteArrayInputStream(yang.getBytes())){
YangStatementSourceImpl statementSource = new YangStatementSourceImpl(inputYangStream);
if(statementSource.getYangAST()==null){
throw new YANGGenerationException("Syntax Error in Generated YANG = " + yang);
}
}
catch(IOException e){
Log.error("Error validating yang file "+ yang,e);
throw new YANGGenerationException("Invalid YANG generated",e);
}
}
private Map<String,Object> parseTosca(String tosca) throws YANGGenerationException {
Log.info("Entered into parseTosca.");
ServiceTemplate serviceTemplate = new ToscaExtensionYamlUtil().yamlToObject(tosca, ServiceTemplate.class);
Map<String, NodeType> nodeTypeMap = serviceTemplate.getNode_types();
String kind = nodeTypeMap.keySet().toArray(new String[0])[0];
NodeType nodeType = nodeTypeMap.get(kind);
Map<String,Object> returnMap= new HashMap<>();
Map<String, PropertyDefinition> propertyDefinitionFromTOSCA = nodeType.getProperties();
returnMap.put(MODULE_TYPE, kind);
List<Leaf> leaves = new LinkedList<>();
for(Map.Entry<String, PropertyDefinition> entry: propertyDefinitionFromTOSCA.entrySet()){
Leaf leaf = new Leaf();
leaf.setName(entry.getKey());
PropertyDefinition pd = entry.getValue();
Map<String,String> typeMap=YangTypes.getYangTypeMap();
if (typeMap.containsKey(pd.getType())) {
String paramType = typeMap.get(pd.getType());
leaf.setType(paramType);
leaf.setDescription(!StringUtils.isEmpty(pd.getDescription()) ? pd.getDescription() : "");
leaf.setMandatory((pd.getRequired() != null) ? Boolean.toString(pd.getRequired()) : Boolean.toString(false));
leaf.setDefaultValue((pd.get_default() != null) ? pd.get_default().toString(): "");
leaves.add(leaf);
} else {
YANGGenerationException yangGenerationException = new YANGGenerationException(pd.getType() + " Type is not supported ", null);
Log.error(pd.getType() + " Type is not supported ", yangGenerationException);
throw yangGenerationException;
}
}
returnMap.put(LEAVES, leaves);
Log.info("exiting parseTosca method with return MAP "+returnMap);
return returnMap;
}
private void validateInput(String uniqueID, String tosca, OutputStream stream) throws YANGGenerationException {
Log.info("Entered into validateInput.");
if(StringUtils.isEmpty(uniqueID)) {
throw new YANGGenerationException("uniqueID is mandatory, cannot be null or empty.",null);
}
if(StringUtils.isEmpty(tosca)) {
throw new YANGGenerationException("tosca is mandatory, cannot be null or empty.",null);
}
if(stream == null){
throw new YANGGenerationException("stream is mandatory, cannot be null.",null);
}
Log.info("exiting validateInput method.");
}
}
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