public static GremlinUnionVariable Create(List <GremlinToSqlContext> unionContextList)
{
if (unionContextList.Count == 0)
{
return(new GremlinUnionNullVariable(unionContextList));
}
if (GremlinUtil.IsTheSameOutputType(unionContextList))
{
switch (unionContextList.First().PivotVariable.GetVariableType())
{
case GremlinVariableType.Vertex:
return(new GremlinUnionVertexVariable(unionContextList));
case GremlinVariableType.Edge:
return(new GremlinUnionEdgeVariable(unionContextList));
case GremlinVariableType.Scalar:
return(new GremlinUnionScalarVariable(unionContextList));
case GremlinVariableType.NULL:
return(new GremlinUnionNullVariable(unionContextList));
case GremlinVariableType.Property:
return(new GremlinUnionPropertyVariable(unionContextList));
}
}
return(new GremlinUnionTableVariable(unionContextList));
}
internal override GremlinToSqlContext GetContext()
{
GremlinToSqlContext inputContext = GetInputContext();
if (inputContext.PivotVariable != null)
{
throw new QueryCompilationException("This step only can be a start step.");
}
GremlinFreeVertexVariable newVariable = new GremlinFreeVertexVariable();
inputContext.VariableList.Add(newVariable);
inputContext.TableReferences.Add(newVariable);
inputContext.SetPivotVariable(newVariable);
inputContext.PivotVariable.OutE(inputContext, new List <string>());
if (EdgeIdsOrElements.Count > 0)
{
List <WBooleanExpression> booleanExprList = new List <WBooleanExpression>();
foreach (var id in EdgeIdsOrElements)
{
if (GremlinUtil.IsNumber(id) || id is string)
{
WScalarExpression firstExpr = inputContext.PivotVariable.GetVariableProperty(GremlinKeyword.EdgeID).ToScalarExpression();
WScalarExpression secondExpr = SqlUtil.GetValueExpr(id);
WBooleanComparisonExpression booleanExpr = SqlUtil.GetEqualBooleanComparisonExpr(firstExpr, secondExpr);
booleanExprList.Add(booleanExpr);
}
}
inputContext.AddPredicate(SqlUtil.ConcatBooleanExprWithOr(booleanExprList));
}
return(inputContext);
}
public override WTableReference ToTableReference()
{
List <WScalarExpression> parameters = new List <WScalarExpression>();
bool isList = false;
if (GremlinUtil.IsList(ConstantValue) || GremlinUtil.IsArray(ConstantValue))
{
isList = true; //1 It's a list
foreach (var value in (IEnumerable)ConstantValue)
{
parameters.Add(SqlUtil.GetValueExpr(value));
}
}
else if (GremlinUtil.IsNumber(ConstantValue) || ConstantValue is string || ConstantValue is bool)
{
parameters.Add(SqlUtil.GetValueExpr(ConstantValue));
}
else
{
throw new ArgumentException();
}
var tableRef = SqlUtil.GetFunctionTableReference(GremlinKeyword.func.Constant, parameters, GetVariableName());
((WConstantReference)tableRef).IsList = isList;
return(SqlUtil.GetCrossApplyTableReference(tableRef));
}
internal override GremlinVariableType GetVariableType()
{
if (GremlinUtil.IsTheSameType(GremlinVariableList))
{
return(GremlinVariableList.First().GetVariableType());
}
return(GremlinVariableType.Table);
}
public static bool CheckIsTheSameType(List <List <GremlinVariable> > brachVariableList)
{
List <GremlinVariable> checkList = new List <GremlinVariable>();
foreach (var branchVariable in brachVariableList)
{
checkList.Add(branchVariable.First());
}
return(GremlinUtil.IsTheSameType(checkList));
}
public GraphTraversal2 Inject(params object[] injections)
{
foreach (var injection in injections)
{
if (GremlinUtil.IsInjectable(injection))
{
this.AddOperator(new GremlinInjectOp(injection));
}
}
return(this);
}
internal static bool IsInjectable(object injection)
{
if (GremlinUtil.IsList(injection) ||
GremlinUtil.IsArray(injection) ||
GremlinUtil.IsNumber(injection) ||
injection is string ||
injection is bool)
{
return(true);
}
else
{
throw new ArgumentException();
}
}
public GraphTraversal2 Constant(object value)
{
if (GremlinUtil.IsList(value) ||
GremlinUtil.IsArray(value) ||
GremlinUtil.IsNumber(value) ||
value is string ||
value is bool)
{
this.AddOperator(new GremlinConstantOp(value));
}
else
{
throw new ArgumentException();
}
return(this);
}
internal override void Populate(string property)
{
RealVariable.Populate(property);
if (ProjectedProperties.Contains(property))
{
return;
}
switch (GetVariableType())
{
case GremlinVariableType.Vertex:
if (GremlinUtil.IsEdgeProperty(property))
{
return;
}
break;
case GremlinVariableType.Edge:
if (GremlinUtil.IsVertexProperty(property))
{
return;
}
break;
case GremlinVariableType.Scalar:
if (property != GremlinKeyword.ScalarValue)
{
return;
}
break;
case GremlinVariableType.Property:
if (property != GremlinKeyword.PropertyValue)
{
return;
}
break;
}
base.Populate(property);
if (!PropertiesMap.ContainsKey(property))
{
string columnName = SelectKey + "_" + property;
RealVariable.BottomUpPopulate(AttachedVariable, property, columnName);
PropertiesMap[property] = columnName;
}
}
internal override GremlinToSqlContext GetContext()
{
GremlinToSqlContext inputContext = GetInputContext();
GremlinTableVariable newVariable;
if (inputContext.PivotVariable == null ||
inputContext.PivotVariable is GremlinFreeVertexVariable ||
inputContext.PivotVariable is GremlinContextVariable)
{
newVariable = new GremlinFreeVertexVariable();
}
else
{
newVariable = new GremlinBoundVertexVariable();
}
if (VertexIdsOrElements.Count > 0)
{
List <WBooleanExpression> booleanExprList = new List <WBooleanExpression>();
foreach (var id in VertexIdsOrElements)
{
if (GremlinUtil.IsNumber(id) || id is string)
{
WScalarExpression firstExpr =
newVariable.GetVariableProperty(GremlinKeyword.NodeID).ToScalarExpression();
WScalarExpression secondExpr = SqlUtil.GetValueExpr(id);
WBooleanComparisonExpression booleanExpr = SqlUtil.GetEqualBooleanComparisonExpr(firstExpr,
secondExpr);
booleanExprList.Add(booleanExpr);
}
else
{
throw new ArgumentException();
}
}
inputContext.AddPredicate(SqlUtil.ConcatBooleanExprWithOr(booleanExprList));
}
inputContext.VariableList.Add(newVariable);
inputContext.TableReferencesInFromClause.Add(newVariable);
inputContext.SetPivotVariable(newVariable);
return(inputContext);
}
private WBooleanExpression CreateBooleanExpression(GremlinVariableProperty variableProperty, object valuesOrPredicate)
{
if (valuesOrPredicate is string || GremlinUtil.IsNumber(valuesOrPredicate) || valuesOrPredicate is bool)
{
WScalarExpression firstExpr = variableProperty.ToScalarExpression();
WScalarExpression secondExpr = SqlUtil.GetValueExpr(valuesOrPredicate);
return(SqlUtil.GetEqualBooleanComparisonExpr(firstExpr, secondExpr));
}
var predicate = valuesOrPredicate as Predicate;
if (predicate != null)
{
WScalarExpression firstExpr = variableProperty.ToScalarExpression();
WScalarExpression secondExpr = SqlUtil.GetValueExpr(predicate.Value);
return(SqlUtil.GetBooleanComparisonExpr(firstExpr, secondExpr, predicate));
}
throw new ArgumentException();
}
public static GremlinCoalesceVariable Create(List <GremlinToSqlContext> coalesceContextList)
{
if (GremlinUtil.IsTheSameOutputType(coalesceContextList))
{
switch (coalesceContextList.First().PivotVariable.GetVariableType())
{
case GremlinVariableType.Vertex:
return(new GremlinCoalesceVertexVariable(coalesceContextList));
case GremlinVariableType.Edge:
return(new GremlinCoalesceEdgeVariable(coalesceContextList));
case GremlinVariableType.Scalar:
return(new GremlinCoalesceScalarVariable(coalesceContextList));
case GremlinVariableType.Property:
return(new GremlinCoalescePropertyVariable(coalesceContextList));
}
}
return(new GremlinCoalesceTableVariable(coalesceContextList));
}
internal override bool Populate(string property, string label = null)
{
if (property == null && label == null)
{
return(true);
}
switch (this.GetVariableType())
{
case GremlinVariableType.Vertex:
if (GremlinUtil.IsEdgeProperty(property))
{
return(false);
}
break;
case GremlinVariableType.Edge:
if (GremlinUtil.IsVertexProperty(property))
{
return(false);
}
break;
case GremlinVariableType.VertexProperty:
if (GremlinUtil.IsVertexProperty(property) || GremlinUtil.IsEdgeProperty(property))
{
return(false);
}
break;
case GremlinVariableType.VertexAndEdge:
case GremlinVariableType.Mixed:
case GremlinVariableType.Unknown:
case GremlinVariableType.NULL:
break;
default:
return(false);
}
return(base.Populate(property, label));
}
internal override void Populate(string property)
{
if (ProjectedProperties.Contains(property))
{
return;
}
switch (GetVariableType())
{
case GremlinVariableType.Vertex:
if (GremlinUtil.IsEdgeProperty(property))
{
return;
}
break;
case GremlinVariableType.Edge:
if (GremlinUtil.IsVertexProperty(property))
{
return;
}
break;
case GremlinVariableType.VertexProperty:
if (GremlinUtil.IsVertexProperty(property) || GremlinUtil.IsEdgeProperty(property))
{
return;
}
break;
case GremlinVariableType.Scalar:
case GremlinVariableType.Property:
if (property != GremlinKeyword.TableDefaultColumnName)
{
return;
}
break;
}
base.Populate(property);
}
public override WTableReference ToTableReference()
{
List <WScalarExpression> parameters = new List <WScalarExpression>();
if (InputVariable == null)
{
//g.Inject()
parameters.Add(SqlUtil.GetValueExpr(null));
}
else
{
parameters.Add(InputVariable.GetDefaultProjection().ToScalarExpression());
}
bool isList = false;
if (GremlinUtil.IsList(Injection) || GremlinUtil.IsArray(Injection))
{
isList = true; //1 It's a list
foreach (var value in (IEnumerable)Injection)
{
parameters.Add(SqlUtil.GetValueExpr(value));
}
}
else if (GremlinUtil.IsNumber(Injection) || Injection is string || Injection is bool)
{
parameters.Add(SqlUtil.GetValueExpr(Injection));
}
else
{
throw new ArgumentException();
}
var tableRef = SqlUtil.GetFunctionTableReference(GremlinKeyword.func.Inject, parameters, GetVariableName());
((WInjectTableReference)tableRef).IsList = isList;
return(SqlUtil.GetCrossApplyTableReference(tableRef));
}
public GraphTraversal2 Option(object pickToken, GraphTraversal2 traversalOption)
{
if (!(GremlinUtil.IsNumber(pickToken) || pickToken is string || pickToken is GremlinKeyword.Pick || pickToken is bool))
{
throw new ArgumentException();
}
var op = GetEndOp() as GremlinChooseOp;
if (op != null)
{
if (op.Options.ContainsKey(pickToken))
{
throw new SyntaxErrorException(
$"Choose step can only have one traversal per pick token: {pickToken}");
}
op.Options[pickToken] = traversalOption;
return(this);
}
else
{
throw new Exception("Option step only can follow by choose step.");
}
}
public GraphTraversal2 HasValue(params object[] valuesOrPredicates)
{
GremlinUtil.CheckIsValueOrPredicate(valuesOrPredicates);
this.AddOperator(new GremlinHasOp(GremlinHasType.HasValue, valuesOrPredicates));
return(this);
}
protected GremlinTableVariable(GremlinVariableType variableType)
{
VariableType = variableType;
VariableName = GremlinUtil.GenerateTableAlias(VariableType);
}
protected GremlinTableVariable(GremlinVariableType variableType) : base(variableType)
{
this.VariableName = GremlinUtil.GenerateTableAlias(this.VariableType);
}
public void SetVariableTypeAndGenerateName(GremlinVariableType variableType)
{
VariableType = variableType;
_variableName = GremlinUtil.GenerateTableAlias(VariableType);
}
internal virtual void Coalesce(GremlinToSqlContext currentContext, List <GremlinToSqlContext> coalesceContextList)
{
GremlinCoalesceVariable newVariable = new GremlinCoalesceVariable(coalesceContextList, GremlinUtil.GetContextListType(coalesceContextList));
currentContext.VariableList.Add(newVariable);
currentContext.TableReferences.Add(newVariable);
currentContext.SetPivotVariable(newVariable);
}
internal virtual void Union(ref GremlinToSqlContext currentContext, List <GremlinToSqlContext> unionContexts)
{
GremlinUnionVariable newVariable = new GremlinUnionVariable(unionContexts, GremlinUtil.GetContextListType(unionContexts));
foreach (var unionContext in unionContexts)
{
unionContext.HomeVariable = newVariable;
}
currentContext.VariableList.Add(newVariable);
currentContext.TableReferences.Add(newVariable);
currentContext.SetPivotVariable(newVariable);
}
public GremlinTableVariable(GremlinVariableType variableType)
{
VariableType = variableType;
variableName = GremlinUtil.GenerateTableAlias(VariableType);
}
public GraphTraversal2 Has(string label, string propertyKey, object predicateOrValue)
{
GremlinUtil.CheckIsValueOrPredicate(predicateOrValue);
this.AddOperator(new GremlinHasOp(label, propertyKey, predicateOrValue));
return(this);
}