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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.rest.dsl;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;
import org.antlr.v4.runtime.tree.TerminalNode;
import org.apache.tinkerpop.gremlin.structure.Direction;
import org.apache.tinkerpop.gremlin.structure.Edge;
import org.onap.aai.AAIDslBaseListener;
import org.onap.aai.AAIDslParser;
import org.onap.aai.edges.EdgeIngestor;
import org.onap.aai.edges.EdgeRuleQuery;
import org.onap.aai.edges.enums.EdgeType;
import org.onap.aai.exceptions.AAIException;
import org.onap.aai.introspection.Introspector;
import org.onap.aai.introspection.Loader;
import org.onap.aai.introspection.exceptions.AAIUnknownObjectException;
import com.jcabi.log.Logger;
public class DslQueryBuilder {
private StringBuilder query;
private StringBuilder queryException;
private final EdgeIngestor edgeRules;
private final Loader loader;
public DslQueryBuilder(EdgeIngestor edgeIngestor, Loader loader) {
this.edgeRules = edgeIngestor;
this.loader = loader;
query = new StringBuilder();
queryException = new StringBuilder();
}
public StringBuilder getQuery() {
return query;
}
public void setQuery(StringBuilder query) {
this.query = query;
}
public StringBuilder getQueryException() {
return queryException;
}
public void setQueryException(StringBuilder queryException) {
this.queryException = queryException;
}
public DslQueryBuilder start() {
query.append("builder");
return this;
}
public DslQueryBuilder startUnion() {
query.append("builder.newInstance()");
return this;
}
public DslQueryBuilder end(DslContext context) {
query.append(".cap('x').unfold().dedup()").append(context.getLimitQuery());
return this;
}
public DslQueryBuilder nodeQuery(DslContext context) {
query.append(".getVerticesByProperty('aai-node-type', '").append(context.getCurrentNode()).append("')");
if(context.isStartNode() && context.getStartNode().isEmpty())
context.setStartNode(context.getCurrentNode());
return this;
}
public DslQueryBuilder edgeQuery(DslContext context) throws AAIException {
EdgeRuleQuery.Builder baseQ = new EdgeRuleQuery.Builder(context.getPreviousNode(), context.getCurrentNode());
String edgeType = "";
if (!edgeRules.hasRule(baseQ.build())) {
throw new AAIException("AAI_6120", "No EdgeRule found for passed nodeTypes: " + context.getPreviousNode()
+ ", " + context.getCurrentNode());
} else if (edgeRules.hasRule(baseQ.edgeType(EdgeType.TREE).build())) {
edgeType = "EdgeType.TREE";
} else if (edgeRules.hasRule(baseQ.edgeType(EdgeType.COUSIN).build())) {
edgeType = "EdgeType.COUSIN";
} else
edgeType = "EdgeType.COUSIN";
query.append(".createEdgeTraversal(").append(edgeType).append(", '").append(context.getPreviousNode())
.append("','").append(context.getCurrentNode()).append("')");
return this;
}
public DslQueryBuilder where(DslContext context) {
query.append(".where(builder.newInstance()");
return this;
}
public DslQueryBuilder endWhere(DslContext context) {
query.append(")");
return this;
}
public DslQueryBuilder endUnion(DslContext context) {
/*
* Need to delete the last comma
*/
if (query.toString().endsWith(",")) {
query.deleteCharAt(query.length() - 1);
}
query.append(")");
return this;
}
public DslQueryBuilder limit(DslContext context) {
/*
* limit queries are strange - You have to append in the end
*/
AAIDslParser.LimitStepContext ctx = (AAIDslParser.LimitStepContext) context.getCtx();
context.setLimitQuery(new StringBuilder(".limit(").append(ctx.NODE().getText()).append(")"));
return this;
}
public DslQueryBuilder filter(DslContext context) {
return this.filterPropertyStart(context).filterPropertyKeys(context).filterPropertyEnd();
}
public DslQueryBuilder filterPropertyStart(DslContext context) {
AAIDslParser.FilterStepContext ctx = (AAIDslParser.FilterStepContext) context.getCtx();
if (ctx.NOT() != null && ctx.NOT().getText().equals("!"))
query.append(".getVerticesExcludeByProperty(");
else
query.append(".getVerticesByProperty(");
return this;
}
public DslQueryBuilder filterPropertyEnd() {
query.append(")");
return this;
}
public DslQueryBuilder validateFilter(DslContext context) throws AAIException {
Introspector obj = loader.introspectorFromName(context.getStartNode());
if(context.getStartNodeKeys().isEmpty()){
queryException.append("No keys sent. Valid keys for " + context.getStartNode() + " are "
+ String.join(",", obj.getIndexedProperties()));
return this;
}
boolean notIndexed = context.getStartNodeKeys().stream()
.filter((prop) -> obj.getIndexedProperties().contains(prop)).collect(Collectors.toList()).isEmpty();
if (notIndexed)
queryException.append("Non indexed keys sent. Valid keys for " + context.getStartNode() + " "
+ String.join(",", obj.getIndexedProperties()));
return this;
}
public DslQueryBuilder filterPropertyKeys(DslContext context) {
AAIDslParser.FilterStepContext ctx = (AAIDslParser.FilterStepContext) context.getCtx();
final String key = ctx.KEY(0).getText();
/*
* This key should be indexed if it is start node
*/
if (context.isStartNode() && context.getStartNodeKeys().isEmpty()) {
// check if key is not indexed, then throw exception
context.getStartNodeKeys().add(key.replaceAll("'", ""));
}
query.append(key);
List<TerminalNode> nodes = ctx.KEY();
List<TerminalNode> numberValues = ctx.NODE();
/*
* Add all String values
*/
List<String> valuesArray = nodes.stream().filter((node) -> !key.equals(node.getText()))
.map((node) -> "'" + node.getText().replace("'", "").trim() + "'").collect(Collectors.toList());
/*
* Add all numeric values
*/
valuesArray.addAll(numberValues.stream().filter((node) -> !key.equals(node.getText()) )
.map((node) -> node.getText()).collect(Collectors.toList()));
/*
* The whole point of doing this to separate P.within from key-value
* search For a list of values QB uses P.within For just a single value
* QB uses key,value check
*/
if (nodes.size() > 2) {
String values = String.join(",", valuesArray);
query.append(",").append(" new ArrayList<>(Arrays.asList(" + values.toString() + "))");
} else {
if (!valuesArray.isEmpty())
query.append(",").append(valuesArray.get(0).toString());
}
return this;
}
public DslQueryBuilder union(DslContext context) {
query.append(".union(");
return this;
}
public DslQueryBuilder store(DslContext context) {
AAIDslParser.SingleNodeStepContext ctx = (AAIDslParser.SingleNodeStepContext) context.getCtx();
if (ctx.STORE() != null && ctx.STORE().getText().equals("*")) {
query.append(".store('x')");
}
return this;
}
public DslQueryBuilder comma(DslContext context) {
query.append(",");
return this;
}
}
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