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/*-
* ============LICENSE_START=======================================================
* SDC
* ================================================================================
* Copyright (C) 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=========================================================
*/
package org.openecomp.sdc.be.dao.neo4j;
import org.apache.commons.lang3.tuple.ImmutablePair;
import org.openecomp.sdc.be.dao.graph.datatype.GraphElement;
import org.openecomp.sdc.be.dao.graph.datatype.GraphNode;
import org.openecomp.sdc.be.dao.graph.datatype.GraphRelation;
import org.openecomp.sdc.be.dao.graph.datatype.RelationEndPoint;
import org.openecomp.sdc.be.dao.neo4j.filters.MatchFilter;
import org.openecomp.sdc.be.dao.neo4j.filters.RecursiveByRelationFilter;
import org.openecomp.sdc.be.dao.neo4j.filters.RecursiveFilter;
import org.openecomp.sdc.be.dao.utils.DaoUtils;
import java.util.List;
import java.util.Map;
public class CypherTranslator {
public String translate(BatchBuilder builder) {
String json = null;
StringBuilder statementList = new StringBuilder();
List<GraphElement> elements = builder.getElements();
int statementCounter = 0;
for (GraphElement element : elements) {
String singleStatementBody = null;
switch (element.getElementType()) {
case Node:
singleStatementBody = prepareNodeStatement(element);
break;
case Relationship:
singleStatementBody = prepareRelationStatement(element);
break;
}
if (singleStatementBody != null && !singleStatementBody.isEmpty()) {
String singleStatement = CypherTemplates.RegularStatementTemplate.replace("$statement$",
singleStatementBody);
statementList.append(singleStatement);
}
++statementCounter;
if (statementCounter < elements.size() && singleStatementBody != null) {
statementList.append(",");
}
}
json = CypherTemplates.BatchTemplate.replace("$statementList$", statementList.toString());
return json;
}
private String prepareNodeStatement(GraphElement element) {
if (element instanceof GraphNode) {
GraphNode node = (GraphNode) element;
switch (node.getAction()) {
case Create:
return createNodeStatement(node);
case Update:
return updateNodeStatement(node);
case Delete:
// TODO
break;
default:
break;
}
}
return null;
}
private String updateNodeStatement(GraphNode node) {
String singleStatement = CypherTemplates.UpdateNodeStatementTemplate.replace("$label$", node.getLabel());
String filter = prepareKeyValueFilter(node);
singleStatement = singleStatement.replace("$filter$", filter);
singleStatement = singleStatement.replace("$props$", DaoUtils.convertToJson(node.toGraphMap()));
return singleStatement;
}
private String createNodeStatement(GraphNode node) {
String singleStatement = CypherTemplates.CreateSingleNodeTemplate.replace("$label$", node.getLabel());
singleStatement = singleStatement.replace("$props$", DaoUtils.convertToJson(node.toGraphMap()));
return singleStatement;
}
private String prepareRelationStatement(GraphElement element) {
if (element instanceof GraphRelation) {
GraphRelation relation = (GraphRelation) element;
switch (relation.getAction()) {
case Create:
return createRelationStatement(relation);
case Update:
return updateRelationStatement(relation);
case Delete:
// TODO
break;
default:
break;
}
}
return null;
}
private String createRelationStatement(GraphRelation relation) {
RelationEndPoint from = relation.getFrom();
String singleStatement;
Map<String, Object> props = relation.toGraphMap();
if (props == null || props.isEmpty()) {
singleStatement = CypherTemplates.CreateRelationTemplateNoProps.replace("$labelFrom$",
from.getLabel().getName());
} else {
singleStatement = CypherTemplates.CreateRelationTemplate.replace("$labelFrom$", from.getLabel().getName());
singleStatement = singleStatement.replace("$props$", DaoUtils.convertToJson(props));
}
singleStatement = singleStatement.replace("$idNameFrom$", from.getIdName());
singleStatement = singleStatement.replace("$idValueFrom$", from.getIdValue().toString());
RelationEndPoint to = relation.getTo();
singleStatement = singleStatement.replace("$labelTo$", to.getLabel().getName());
singleStatement = singleStatement.replace("$idNameTo$", to.getIdName());
singleStatement = singleStatement.replace("$idvalueTo$", to.getIdValue().toString());
singleStatement = singleStatement.replace("$type$", relation.getType());
return singleStatement;
}
private String updateRelationStatement(GraphRelation relation) {
// TODO
return null;
}
private String prepareKeyValueFilter(GraphNode node) {
StringBuilder sb = new StringBuilder();
ImmutablePair<String, Object> keyValueId = node.getKeyValueId();
sb.append(keyValueId.getKey()).append(":");
if (keyValueId.getValue() instanceof String) {
sb.append("'");
}
sb.append(keyValueId.getValue());
if (keyValueId.getValue() instanceof String) {
sb.append("'");
}
return sb.toString();
}
public String translateGet(RecursiveFilter filter) {
String requestJson = null;
String statement;
if (filter instanceof RecursiveByRelationFilter) {
RecursiveByRelationFilter byRelationFilter = (RecursiveByRelationFilter) filter;
statement = CypherTemplates.GetByRelationNodeRecursiveTemplate.replace("$labelNode$",
byRelationFilter.getNode().getLabel());
String keyValueId = prepareKeyValueFilter(byRelationFilter.getNode());
statement = statement.replace("$propsNode$", keyValueId);
statement = statement.replace("$type$", byRelationFilter.getRelationType());
String relationProps = prepareFilterBody(filter);
statement = statement.replace("$propsRel$", relationProps);
statement = statement.replace("$labelSrc$", filter.getNodeType().getName());
} else {
statement = CypherTemplates.GetNodeRecursiveTemplate.replace("$label$", filter.getNodeType().getName());
// replace filter
if (filter.getProperties().isEmpty()) {
// get all records by label
statement = statement.replace("{$filter$}", "");
} else {
String filterStr = prepareFilterBody(filter);
statement = statement.replace("$filter$", filterStr);
}
}
if (filter.getChildRelationTypes() == null || filter.getChildRelationTypes().isEmpty()) {
statement = statement.replace("$typesList$", "");
} else {
StringBuilder typesList = new StringBuilder();
int count = 0;
for (String type : filter.getChildRelationTypes()) {
typesList.append(":").append(type);
++count;
if (count < filter.getChildRelationTypes().size()) {
typesList.append("|");
}
}
statement = statement.replace("$typesList$", typesList.toString());
}
String singleStatement = CypherTemplates.RegularStatementTemplate.replace("$statement$", statement);
requestJson = CypherTemplates.BatchTemplate.replace("$statementList$", singleStatement);
return requestJson;
}
public static String prepareFilterBody(MatchFilter filter) {
StringBuilder sb = new StringBuilder();
int count = 0;
int size = filter.getProperties().entrySet().size();
for (Map.Entry<String, Object> entry : filter.getProperties().entrySet()) {
sb.append(entry.getKey()).append(":");
if (entry.getValue() instanceof String) {
sb.append("'");
}
sb.append(entry.getValue());
if (entry.getValue() instanceof String) {
sb.append("'");
}
++count;
if (count < size) {
sb.append(",");
}
}
return sb.toString();
}
}
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