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/**
* ============LICENSE_START=======================================================
* org.onap.aai
* ================================================================================
* Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.aai.parsers.relationship;
import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;
import org.apache.tinkerpop.gremlin.structure.Direction;
import org.onap.aai.config.SpringContextAware;
import org.onap.aai.edges.EdgeIngestor;
import org.onap.aai.edges.EdgeRuleQuery;
import org.onap.aai.edges.exceptions.AmbiguousRuleChoiceException;
import org.onap.aai.edges.exceptions.EdgeRuleNotFoundException;
import org.onap.aai.exceptions.AAIException;
import org.onap.aai.introspection.*;
import org.onap.aai.setup.SchemaVersions;
import org.onap.aai.introspection.exceptions.AAIUnknownObjectException;
import org.onap.aai.parsers.exceptions.AAIIdentityMapParseException;
import org.onap.aai.parsers.exceptions.AmbiguousMapAAIException;
import org.onap.aai.parsers.uri.URIParser;
import org.onap.aai.schema.enums.ObjectMetadata;
import org.onap.aai.edges.enums.AAIDirection;
import org.onap.aai.edges.EdgeRule;
import org.onap.aai.edges.enums.EdgeType;
import org.springframework.context.ApplicationContext;
import javax.ws.rs.core.UriBuilder;
import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Optional;
/**
* The Class RelationshipToURI.
*/
public class RelationshipToURI {
private static final EELFLogger LOGGER = EELFManager.getInstance().getLogger(RelationshipToURI.class);
private Introspector relationship = null;
private Loader loader = null;
private ModelType modelType = null;
private EdgeIngestor edgeRules = null;
private URI uri = null;
private SchemaVersions schemaVersions;
/**
* Instantiates a new relationship to URI.
*
* @param loader the loader
* @param relationship the relationship
* @throws UnsupportedEncodingException the unsupported encoding exception
* @throws AAIException the AAI exception
*/
public RelationshipToURI(Loader loader, Introspector relationship) throws UnsupportedEncodingException, AAIException {
this.relationship = relationship;
this.modelType = relationship.getModelType();
this.loader = loader;
this.initEdgeIngestor();
this.parse();
}
protected void initEdgeIngestor() {
//TODO proper spring wiring, but that requires a lot of refactoring so for now we have this
ApplicationContext ctx = SpringContextAware.getApplicationContext();
edgeRules = ctx.getBean(EdgeIngestor.class);
schemaVersions = (SchemaVersions) ctx.getBean("schemaVersions");
}
/**
* Parses the.
* @throws
*
* @throws UnsupportedEncodingException the unsupported encoding exception
* @throws AAIException the AAI exception
*/
protected void parse() throws AAIException {
String relatedLink = (String)relationship.getValue("related-link");
Optional<URI> result;
try {
if (loader.getVersion().compareTo(schemaVersions.getRelatedLinkVersion()) >= 0) {
result = processRelatedLink(relatedLink);
if (!result.isPresent()) {
result = processRelationshipData();
}
} else {
result = processRelationshipData();
if (!result.isPresent()) {
result = processRelatedLink(relatedLink);
}
}
if (result.isPresent()) {
this.uri = result.get();
} else {
throw new AAIIdentityMapParseException("nothing to parse");
}
} catch (AAIException e) {
throw e;
} catch (Exception e) {
throw new AAIIdentityMapParseException("Could not parse relationship-list object: " + e.getMessage(), e);
}
}
private Optional<URI> processRelationshipData() throws AAIException, UnsupportedEncodingException {
Optional<URI> result = Optional.empty();
StringBuilder uriBuilder = new StringBuilder();
List<Object> data = (List<Object>)relationship.getValue("relationship-data");
Introspector wrapper;
String key;
String value;
String objectType;
String propertyName;
String topLevelType = null;
String[] split;
HashMap<String, Introspector> map = new HashMap<>();
for (Object datum : data) {
wrapper = IntrospectorFactory.newInstance(modelType, datum);
key = (String)wrapper.getValue("relationship-key");
value = (String)wrapper.getValue("relationship-value");
split = key.split("\\.");
if (split == null || split.length != 2) {
throw new AAIIdentityMapParseException("incorrect format for key must be of the form {node-type}.{property-name}");
}
//check node name ok
//check prop name ok
objectType = split[0];
propertyName = split[1];
try {
Introspector wrappedObj = loader.introspectorFromName(objectType);
if (!wrappedObj.hasProperty(propertyName)) {
throw new AAIIdentityMapParseException("invalid property name in map: " + propertyName);
}
if (map.containsKey(objectType)) {
wrappedObj = map.get(objectType);
} else {
map.put(objectType, wrappedObj);
}
if (wrappedObj.getValue(propertyName) == null) {
wrappedObj.setValue(propertyName, value);
} else {
throw new AmbiguousMapAAIException("cannot determine where key/value goes: " + propertyName + "/" + value);
}
if (wrappedObj.getMetadata(ObjectMetadata.NAMESPACE) != null) {
if (topLevelType == null) {
topLevelType = objectType;
} else if (!topLevelType.equals(objectType)){
throw new AmbiguousMapAAIException("found two top level nodes of different types: " + topLevelType + " and " + objectType);
}
}
} catch (AAIUnknownObjectException e) {
throw new AAIIdentityMapParseException("invalid object name in map: " + objectType, e);
}
}
if (!map.isEmpty()) {
String startType = (String)relationship.getValue("related-to");
List<String> nodeTypes = new ArrayList<>();
nodeTypes.addAll(map.keySet());
String displacedType;
for (int i = 0; i < nodeTypes.size(); i++) {
if (nodeTypes.get(i).equals(startType)) {
displacedType = nodeTypes.set(nodeTypes.size() - 1, startType);
nodeTypes.set(i, displacedType);
break;
}
}
sortRelationships(nodeTypes, startType, 1);
int startTypeIndex = nodeTypes.indexOf(startType);
int topLevelIndex = 0;
if (topLevelType != null) {
topLevelIndex = nodeTypes.indexOf(topLevelType);
}
//remove additional types not needed if they are there
List<String> nodeTypesSubList = nodeTypes;
if (topLevelIndex != 0) {
nodeTypesSubList = nodeTypes.subList(topLevelIndex, startTypeIndex+1);
}
for (String type : nodeTypesSubList) {
uriBuilder.append(map.get(type).getURI());
}
if (!nodeTypesSubList.isEmpty()) {
result = Optional.of(UriBuilder.fromPath(uriBuilder.toString()).build());
}
}
return result;
}
private Optional<URI> processRelatedLink(String relatedLink) throws URISyntaxException, UnsupportedEncodingException, AAIIdentityMapParseException {
Optional<URI> result = Optional.empty();
if (relatedLink != null) {
URI resultUri = new URI(relatedLink);
String path = resultUri.toString();
resultUri = UriBuilder.fromPath(resultUri.getRawPath()).build();
URIParser uriParser = new URIParser(this.loader, resultUri);
try {
uriParser.validate();
} catch (AAIException e) {
throw new AAIIdentityMapParseException("related link is invalid: " + relatedLink, e);
}
result = Optional.of(resultUri);
}
return result;
}
/**
* Sort relationships.
*
* @param data the data
* @param startType the start type
* @param i the i
* @return true, if successful
* @throws AAIException
*/
private boolean sortRelationships(List<String> data, String startType, int i) throws AAIException {
if (i == data.size()) {
return true;
}
int j;
String objectType;
String displacedObject;
EdgeRule rule;
Direction direction;
for (j = (data.size() - i) - 1; j >= 0; j--) {
objectType = data.get(j);
try {
rule = edgeRules.getRule(new EdgeRuleQuery.Builder(startType, objectType).edgeType(EdgeType.TREE).build());
direction = rule.getDirection();
if (direction != null) {
if ((rule.getContains().equals(AAIDirection.OUT.toString()) && direction.equals(Direction.IN)) || (rule.getContains().equals(AAIDirection.IN.toString()) && direction.equals(Direction.OUT))) {
displacedObject = data.set((data.size() - i) - 1, data.get(j));
data.set(j, displacedObject);
if (sortRelationships(data, objectType, i+1)) {
return true;
} else {
//continue to process
}
}
}
} catch (AAIException | EdgeRuleNotFoundException | AmbiguousRuleChoiceException e ) {
//ignore exceptions generated
continue;
}
}
return false;
}
/**
* Gets the uri.
*
* @return the uri
*/
public URI getUri() {
return uri;
}
}
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