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/**
* ============LICENSE_START=======================================================
* org.onap.aai
* ================================================================================
* Copyright © 2017 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=========================================================
*
* ECOMP is a trademark and service mark of AT&T Intellectual Property.
*/
package org.onap.aai.rest;
import java.net.URI;
import java.util.ArrayList;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.Consumes;
import javax.ws.rs.DefaultValue;
import javax.ws.rs.Encoded;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.HttpHeaders;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status;
import javax.ws.rs.core.UriInfo;
import org.apache.tinkerpop.gremlin.structure.Vertex;
import org.onap.aai.dbmap.DBConnectionType;
import org.onap.aai.exceptions.AAIException;
import org.onap.aai.introspection.ModelType;
import org.onap.aai.introspection.Version;
import org.onap.aai.parsers.query.QueryParser;
import org.onap.aai.rest.db.HttpEntry;
import org.onap.aai.rest.search.GenericQueryProcessor;
import org.onap.aai.rest.search.QueryProcessorType;
import org.onap.aai.restcore.HttpMethod;
import org.onap.aai.restcore.RESTAPI;
import org.onap.aai.restcore.util.URITools;
import org.onap.aai.serialization.db.DBSerializer;
import org.onap.aai.serialization.engines.QueryStyle;
import org.onap.aai.serialization.engines.TransactionalGraphEngine;
import org.onap.aai.serialization.queryformats.Format;
import org.onap.aai.serialization.queryformats.FormatFactory;
import org.onap.aai.serialization.queryformats.Formatter;
import org.onap.aai.serialization.queryformats.SubGraphStyle;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
@Path("{version: v9|v1[01]}/query")
public class QueryConsumer extends RESTAPI {
/** The introspector factory type. */
private ModelType introspectorFactoryType = ModelType.MOXY;
private QueryProcessorType processorType = QueryProcessorType.LOCAL_GROOVY;
/** The query style. */
private QueryStyle queryStyle = QueryStyle.TRAVERSAL;
@PUT
@Consumes({ MediaType.APPLICATION_JSON})
@Produces({ MediaType.APPLICATION_JSON})
public Response executeQuery(String content, @PathParam("version")String versionParam, @PathParam("uri") @Encoded String uri, @DefaultValue("graphson") @QueryParam("format") String queryFormat,@DefaultValue("no_op") @QueryParam("subgraph") String subgraph, @Context HttpHeaders headers, @Context UriInfo info, @Context HttpServletRequest req) {
String sourceOfTruth = headers.getRequestHeaders().getFirst("X-FromAppId");
String realTime = headers.getRequestHeaders().getFirst("Real-Time");
String queryProcessor = headers.getRequestHeaders().getFirst("QueryProcessor");
QueryProcessorType processorType = this.processorType;
Response response = null;
TransactionalGraphEngine dbEngine = null;
try {
this.checkQueryParams(info.getQueryParameters());
Format format = Format.valueOf(queryFormat);
if (queryProcessor != null) {
processorType = QueryProcessorType.valueOf(queryProcessor);
}
SubGraphStyle subGraphStyle = SubGraphStyle.valueOf(subgraph);
JsonParser parser = new JsonParser();
JsonObject input = parser.parse(content).getAsJsonObject();
JsonElement startElement = input.get("start");
JsonElement queryElement = input.get("query");
JsonElement gremlinElement = input.get("gremlin");
List<URI> startURIs = new ArrayList<>();
String queryURI = "";
String gremlin = "";
Version version = Version.valueOf(versionParam);
DBConnectionType type = this.determineConnectionType(sourceOfTruth, realTime);
HttpEntry httpEntry = new HttpEntry(version, introspectorFactoryType, queryStyle, type);
dbEngine = httpEntry.getDbEngine();
if (startElement != null) {
if (startElement.isJsonArray()) {
for (JsonElement element : startElement.getAsJsonArray()) {
startURIs.add(new URI(element.getAsString()));
}
} else {
startURIs.add(new URI(startElement.getAsString()));
}
}
if (queryElement != null) {
queryURI = queryElement.getAsString();
}
if (gremlinElement != null) {
gremlin = gremlinElement.getAsString();
}
URI queryURIObj = new URI(queryURI);
GenericQueryProcessor processor = null;
if (!startURIs.isEmpty()) {
Set<Vertex> vertexSet = new LinkedHashSet<>();
QueryParser uriQuery;
List<Vertex> vertices;
for (URI startUri : startURIs) {
uriQuery = dbEngine.getQueryBuilder().createQueryFromURI(startUri, URITools.getQueryMap(startUri));
vertices = uriQuery.getQueryBuilder().toList();
vertexSet.addAll(vertices);
}
processor = new GenericQueryProcessor.Builder(dbEngine)
.startFrom(vertexSet).queryFrom(queryURIObj)
.processWith(processorType).create();
} else if (!queryURI.equals("")){
processor = new GenericQueryProcessor.Builder(dbEngine)
.queryFrom(queryURIObj)
.processWith(processorType).create();
} else {
processor = new GenericQueryProcessor.Builder(dbEngine)
.queryFrom(gremlin)
.processWith(processorType).create();
}
String result = "";
List<Object> vertices = processor.execute(subGraphStyle);
DBSerializer serializer = new DBSerializer(version, dbEngine, introspectorFactoryType, sourceOfTruth);
FormatFactory ff = new FormatFactory(httpEntry.getLoader(), serializer);
Formatter formater = ff.get(format, info.getQueryParameters());
result = formater.output(vertices).toString();
response = Response.status(Status.OK)
.type(MediaType.APPLICATION_JSON)
.entity(result).build();
} catch (AAIException e) {
response = consumerExceptionResponseGenerator(headers, info, HttpMethod.GET, e);
} catch (Exception e ) {
AAIException ex = new AAIException("AAI_4000", e);
response = consumerExceptionResponseGenerator(headers, info, HttpMethod.GET, ex);
} finally {
if (dbEngine != null) {
dbEngine.rollback();
}
}
return response;
}
public void checkQueryParams(MultivaluedMap<String, String> params) throws AAIException {
if (params.containsKey("depth") && params.getFirst("depth").matches("\\d+")) {
String depth = params.getFirst("depth");
Integer i = Integer.parseInt(depth);
if (i > 1) {
throw new AAIException("AAI_3303");
}
}
}
}
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