private static bool ProcessJoinOverFilter(
RuleProcessingContext context,
System.Data.Entity.Core.Query.InternalTrees.Node joinNode,
out System.Data.Entity.Core.Query.InternalTrees.Node newNode)
{
newNode = joinNode;
TransformationRulesContext transformationRulesContext = (TransformationRulesContext)context;
Command command = transformationRulesContext.Command;
System.Data.Entity.Core.Query.InternalTrees.Node node1 = (System.Data.Entity.Core.Query.InternalTrees.Node)null;
System.Data.Entity.Core.Query.InternalTrees.Node child0 = joinNode.Child0;
if (joinNode.Child0.Op.OpType == OpType.Filter)
{
node1 = joinNode.Child0.Child1;
child0 = joinNode.Child0.Child0;
}
System.Data.Entity.Core.Query.InternalTrees.Node node2 = joinNode.Child1;
if (joinNode.Child1.Op.OpType == OpType.Filter && joinNode.Op.OpType != OpType.LeftOuterJoin)
{
node1 = node1 != null?command.CreateNode((Op)command.CreateConditionalOp(OpType.And), node1, joinNode.Child1.Child1) : joinNode.Child1.Child1;
node2 = joinNode.Child1.Child0;
}
if (node1 == null)
{
return(false);
}
System.Data.Entity.Core.Query.InternalTrees.Node node3 = joinNode.Op.OpType != OpType.CrossJoin ? command.CreateNode(joinNode.Op, child0, node2, joinNode.Child2) : command.CreateNode(joinNode.Op, child0, node2);
FilterOp filterOp = command.CreateFilterOp();
newNode = command.CreateNode((Op)filterOp, node3, node1);
transformationRulesContext.SuppressFilterPushdown(newNode);
return(true);
}
/// <summary>
/// Tries to find the filter operator corresponding to a operator key used in javascript.</summary>
/// <param name="filterOp">
/// Operator key</param>
/// <param name="op">
/// Operator is returned through this parameter.</param>
/// <returns>
/// True if "filterOp" is one of valid operator keys.</returns>
internal static bool TryParse(string filterOp, out FilterOp op)
{
for (int i = 0; i < filterOpKeys.Length; i++)
{
if (filterOpKeys[i] == filterOp)
{
op = (FilterOp)(i);
return(true);
}
}
op = FilterOp.EQ;
return(false);
}
/// <summary>
/// Creates and adds an AttributeValueAssertion to the filter.
/// </summary>
/// <param name="rfcType">
/// Filter type: EQUALITY_MATCH | GREATER_OR_EQUAL
/// | LESS_OR_EQUAL | APPROX_MATCH ].
/// </param>
/// <param name="attrName">Name of the attribute to be asserted.</param>
/// <param name="valueArray">Value of the attribute to be asserted.</param>
/// <exception cref="LdapException">
/// Cannot insert an attribute assertion in a substring
/// or
/// Invalid filter type for AttributeValueAssertion.
/// </exception>
public void AddAttributeValueAssertion(FilterOp rfcType, string attrName, sbyte[] valueArray)
{
if (_filterStack != null && _filterStack.Count != 0 && _filterStack.Peek() is Asn1SequenceOf)
{
throw new LdapException("Cannot insert an attribute assertion in a substring", LdapStatusCode.FilterError);
}
if (rfcType != FilterOp.EqualityMatch && rfcType != FilterOp.GreaterOrEqual && rfcType != FilterOp.LessOrEqual && rfcType != FilterOp.ApproxMatch)
{
throw new LdapException("Invalid filter type for AttributeValueAssertion", LdapStatusCode.FilterError);
}
Asn1Object current = new Asn1Tagged(new Asn1Identifier((int)rfcType, true), new RfcAttributeValueAssertion(attrName, valueArray), false);
AddObject(current);
}
/// <summary>
/// Completes a nested filter and checks for the valid filter type.
/// </summary>
/// <param name="rfcType">Type of filter to complete.</param>
/// <exception cref="LdapException">Mismatched ending of nested filter.</exception>
public void EndNestedFilter(FilterOp rfcType)
{
if (rfcType == FilterOp.Not)
{
_filterStack.Pop();
}
var topOfStackType = _filterStack.Peek().GetIdentifier().Tag;
if (topOfStackType != (int)rfcType)
{
throw new LdapException("Mismatched ending of nested filter", LdapStatusCode.FilterError);
}
_filterStack.Pop();
}
/// <summary>
/// Creates and adds the Asn1Tagged value for a nestedFilter: AND, OR, or
/// NOT.
/// Note that a Not nested filter can only have one filter, where AND
/// and OR do not
/// </summary>
/// <param name="rfcType">Filter type:
/// [AND | OR | NOT]</param>
/// <exception cref="LdapException">Attempt to create a nested filter other than AND, OR or NOT</exception>
public void StartNestedFilter(FilterOp rfcType)
{
Asn1Object current;
if (rfcType == FilterOp.And || rfcType == FilterOp.Or)
{
current = new Asn1Tagged(new Asn1Identifier((int)rfcType, true), new Asn1SetOf(), false);
}
else if (rfcType == FilterOp.Not)
{
current = new Asn1Tagged(new Asn1Identifier((int)rfcType, true));
}
else
{
throw new LdapException("Attempt to create a nested filter other than AND, OR or NOT",
LdapStatusCode.FilterError);
}
AddObject(current);
}
/// <summary>
/// Creates and adds the Asn1Tagged value for a nestedFilter: AND, OR, or
/// NOT.
/// Note that a Not nested filter can only have one filter, where AND
/// and OR do not.
/// </summary>
/// <param name="rfcType">
/// Filter type:
/// [AND | OR | NOT].
/// </param>
/// <exception cref="LdapException">Attempt to create a nested filter other than AND, OR or NOT.</exception>
public void StartNestedFilter(FilterOp rfcType)
{
Asn1Object current;
switch (rfcType)
{
case FilterOp.And:
case FilterOp.Or:
current = new Asn1Tagged(new Asn1Identifier((int)rfcType, true), new Asn1SetOf(), false);
break;
case FilterOp.Not:
current = new Asn1Tagged(new Asn1Identifier((int)rfcType, true));
break;
default:
throw new LdapException("Attempt to create a nested filter other than AND, OR or NOT", LdapStatusCode.FilterError);
}
AddObject(current);
}
/// <summary>
/// FilterOp
/// First visit the predicate (because that may contain references to
/// the relop input), and then visit the relop input. No additional
/// processing is required
/// </summary>
/// <param name="op"> the filterOp </param>
/// <param name="n"> current node </param>
/// <returns> </returns>
public override Node Visit(FilterOp op, Node n)
{
// visit the predicate first, and then teh relop input
VisitChildrenReverse(n);
return(n);
}
/// <summary>
/// FilterOp handling
///
/// Process the predicate child, and then the input child - since the
/// predicate child will probably have references to the input.
/// </summary>
/// <param name="op"> </param>
/// <param name="n"> </param>
public override void Visit(FilterOp op, Node n)
{
VisitNode(n.Child1); // visit predicate first
VisitNode(n.Child0); // then visit the relop input
}
// <summary>
// FilterOp
// </summary>
public override int Visit(FilterOp op, Node n)
{
return(VisitNode(n.Child0));
}
public override int Visit(FilterOp op, System.Data.Entity.Core.Query.InternalTrees.Node n)
{
return(this.VisitNode(n.Child0));
}
/// <summary>
/// Converts a FilterFieldType enum to its string key used in javascript</summary>
/// <param name="type">
/// A filter field type</param>
/// <returns>
/// The string key corresponding to the field type</returns>
//internal static string ToStringKey(this FilterFieldType type)
//{
// return fieldTypeKeys[(int)type];
//}
/// <summary>
/// Converts a FilterOp enum to its string key used in javascript</summary>
/// <param name="op">
/// A filter operator</param>
/// <returns>
/// The string key corresponding to the filter operator</returns>
internal static string ToStringKey(this FilterOp op)
{
return(filterOpKeys[(int)op]);
}
// <summary>
// FilterOp
// </summary>
// <remarks>
// If the input to the FilterOp is a NestOp, and if the filter predicate
// does not reference any of the collection Vars of the nestOp, then the
// FilterOp can be simply pushed below the NestOp:
// Filter(Nest(X, ...), pred) => Nest(Filter(X, pred), ...)
// Note: even if the filter predicate originally referenced one of the
// collection vars, as part of our bottom up traversal, the appropriate
// Var was replaced by a copy of the source of the collection. So, this
// transformation should always be legal.
// </remarks>
public override Node Visit(FilterOp op, Node n)
{
// First, visit my children
VisitChildren(n);
// see if the child is a nestOp
var nestOp = n.Child0.Op as NestBaseOp;
if (null != nestOp)
{
#if DEBUG
// check to see if the predicate references any of the collection
// expressions. If it doesn't, then we can push the filter down, but
// even if it does it's probably OK.
var predicateNodeInfo = Command.GetNodeInfo(n.Child1);
foreach (var ci in nestOp.CollectionInfo)
{
PlanCompiler.Assert(!predicateNodeInfo.ExternalReferences.IsSet(ci.CollectionVar), "predicate references collection?");
}
#endif
//DEBUG
// simply pull up the nest child above ourself.
var nestOpNode = n.Child0;
var nestOpInputNode = nestOpNode.Child0;
n.Child0 = nestOpInputNode;
nestOpNode.Child0 = n;
// recompute node info - no need to perform anything for the predicate
Command.RecomputeNodeInfo(n);
Command.RecomputeNodeInfo(nestOpNode);
return nestOpNode;
}
return n;
}
public override void Visit(FilterOp op, Node n)
{
VisitRelOpDefault(op, n);
AssertRelOpOrPhysicalOp(n.Child0.Op);
AssertScalarOp(n.Child1.Op);
AssertBooleanOp(n.Child1.Op);
}
/// <summary>
/// Converts a list of FilterLine objects to a WHERE clause usable in a SQL select query.</summary>
/// <param name="lines">
/// List of FilterLine objects to convert to a WHERE clause.</param>
/// <param name="filterFields">
/// Collection of FilterField objects to determine field types and check filterability of fields.
/// This list is usually the filter field options list that is sent to a filter panel object.
/// If this list is specified, for a filter to be considered valid, its fieldname must be
/// found in the list. If the list is given null, field name is looked up in fieldExpressions,
/// query or row and field type is determined by the field object in the row.</param>
/// <param name="fieldExpressions">
/// An optional dictionary of field expressions. If a field's corresponding SQL expression like
/// "join.field_name" is not determinable by reading in the query or the row, this list must be specified.
/// When specified, this list takes priority over the query and row objects to determine the field
/// expression.</param>
/// <param name="query">
/// An optional SqlSelect query to determine field expressions. If a field's expression is not found
/// in "fieldExpressions" dictionary, it is looked up in query object.</param>
/// <param name="row">
/// An optional Row object to determine field types and expressions.</param>
/// <param name="process">
/// An optional delegate to preprocess a filter line and return a filter. It should return an empty
/// filter if this line should be ignored. Null if this line should be processed as usual.</param>
/// <returns>
/// WHERE clause.</returns>
/// <remarks>
/// Invalid filter lines are simply skipped, no error occurs.</remarks>
public static string ToWhereString(SqlQuery query, IEnumerable <FilterLine> lines, FilterFields filterFields,
IDictionary <string, string> fieldExpressions = null, Row row = null, Func <FilterLine, BaseCriteria> process = null)
{
if (lines == null)
{
throw new ArgumentNullException("lines");
}
const string AND = " AND ";
const string OR = " OR ";
const string LPAREN = "(";
const string RPAREN = ")";
//const string TRUE = "1=1";
// build a dictionary of FilterField objects if the list is specified
// this list is usually the filter field options list that is sent to FilterPanel object.
/*Dictionary<string, FilterField> filterFieldDict = null;
* if (filterFields != null)
* {
* filterFieldDict = new Dictionary<string, FilterField>(StringComparer.OrdinalIgnoreCase);
* foreach (FilterField f in filterFields)
* {
* filterFieldDict[f.GetName()] = f;
*
* if (f.GetTextual() != null)
* filterFieldDict[f.GetTextual()] = f;
* }
* }*/
bool inParens = false;
bool hasOr = false;
StringBuilder sb = new StringBuilder();
foreach (FilterLine line in lines)
{
if (inParens &&
(line._rightParen || line._leftParen))
{
sb.Append(RPAREN);
inParens = false;
}
if (sb.Length > 0)
{
sb.Append(line._or ? OR : AND);
if (line._or)
{
hasOr = true;
}
}
if (line._leftParen)
{
sb.Append(LPAREN);
inParens = true;
}
if (!line.IsValid)
{
throw new ArgumentOutOfRangeException("InvalidFilterLine", line.ToJson());
//sb.Append(TRUE);
//continue;
}
if (process != null)
{
var filter = process(line);
if (!Object.ReferenceEquals(filter, null))
{
if (filter.IsEmpty)
{
//sb.Append(TRUE);
throw new ArgumentOutOfRangeException("EmptyFilterLine", line.ToJson());
}
else
{
sb.Append(filter.ToStringIgnoreParams()); // FIX!!!!
}
continue;
}
}
string fieldName = line.Field;
// if filter fields list is specified, the fieldname must exist in this list, otherwise
// it may be an hacking attempt, as user tries to filter a field that he is not
// represented with
IFilterField filterField = null;
if (filterFields != null)
{
filterField = filterFields.ByNameOrTextual(fieldName);
if (filterField == null)
{
throw new ArgumentOutOfRangeException("UnknownFilterField", line.ToJson());
}
//sb.Append(TRUE);
//continue;
}
Field field = null;
if (row != null)
{
field = row.FindField(fieldName);
}
/*// by default, suppose fields are string typed
* FilterFieldType type = FilterFieldType.String;
* // if given, determine field type by looking up in the filter field options
* if (filterField != null)
* type = filterField.GetType();
* // otherwise, determine field type by the class of field object
* else if (field != null)
* type = FilterField.ToFilterFieldType(field);*/
// to determine field expression, first look it up in fieldExpressions dictionary
string fieldExpr;
if (fieldExpressions == null ||
!fieldExpressions.TryGetValue(fieldName, out fieldExpr))
{
fieldExpr = null;
}
if (fieldExpr == null)
{
if (field != null)
{
fieldExpr = field.Expression;
}
else if (query != null)
{
fieldExpr = query.GetExpression(fieldName);
}
}
if (fieldExpr == null)
{
// field is not found anywhere, don't allow unknown fields as it may cause a script injection
// attack or other types of security threats!
//sb.Append(TRUE);
throw new ArgumentOutOfRangeException("UnknownFilterField", line.ToJson());
//continue;
}
bool isNumeric =
(filterField != null && (filterField.Handler == "Integer" || filterField.Handler == "Decimal")) ||
(filterField == null && field != null &&
(field is Int16Field || field is Int32Field || field is Int64Field || field is DoubleField || field is DecimalField));
// determine expression for this filter by operator type
FilterOp op = line.Op;
string sqlOp = SqlConditionOperators[(int)(op)];
if (op == FilterOp.IN)
{
StringBuilder vs = new StringBuilder();
var values = line.Values;
if (line.Values != null)
{
foreach (var s in line.Values)
{
if (isNumeric)
{ // parse invariant decimal value for integer and float fields
decimal d;
if (Decimal.TryParse(s, NumberStyles.Float, Invariants.NumberFormat, out d))
{
if (vs.Length > 0)
{
vs.Append(",");
}
vs.Append(d.ToInvariant());
}
}
else
{
if (vs.Length > 0)
{
vs.Append(",");
}
vs.Append(s.ToSql());
}
}
}
if (vs.Length == 0)
{
//sb.Append(TRUE);
throw new ArgumentOutOfRangeException("InvalidFilterLine", line.ToJson());
}
else
{
sb.AppendFormat(sqlOp, fieldExpr, vs.ToString());
}
continue;
}
// operator needs value if not one of "true", "false", "is null", "is not null"
if (op.IsNeedsValue())
{
// starts with and contains operators requires special care, as their sql expressions
// already contains single quotes, so .ToSql() cannot be used
if (op.IsLike())
{
if (line.Value != null)
{
sb.AppendFormat(SqlConditionOperators[(int)(op)],
fieldExpr, line.Value.Replace("'", "''"));
}
continue;
}
// parse value1 and value2
string value1 = "";
string value2 = "";
// simple loop to parse value1 and value2 in one turn
for (int phase = 0; phase <= 1; phase++)
{
string valueText;
if (phase == 0)
{
valueText = line.Value;
}
else
{
valueText = line.Value2;
}
valueText = valueText.TrimToNull();
// value must be entered
if (valueText == null)
{
throw new ArgumentOutOfRangeException("InvalidFilterLine", line.ToJson());
}
bool isDateTime =
(filterField != null && (filterField.Handler == "Date")) ||
(filterField == null && field != null &&
(field is DateTimeField));
if (isNumeric)
{ // parse invariant decimal value for integer and float fields
decimal d;
if (!Decimal.TryParse(valueText, NumberStyles.Float, Invariants.NumberFormat, out d))
{
throw new ArgumentOutOfRangeException("InvalidFilterLine", line.ToJson());
}
valueText = d.ToInvariant();
}
else if (isDateTime)
{ // parse iso date-time string
DateTime d;
if (!DateHelper.TryParseISO8601DateTime(valueText, out d))
{
throw new ArgumentOutOfRangeException("InvalidFilterLine", line.ToJson());
}
DateTimeKind kind = DateTimeKind.Unspecified;
object dateKindObj;
if (filterField != null && filterField.Params != null && filterField.Params.TryGetValue("DateKind", out dateKindObj))
{
var dateKind = ((DateFilterKind)Convert.ToInt32(dateKindObj));
kind = dateKind == DateFilterKind.DateTimeLocal ? DateTimeKind.Local : (dateKind == DateFilterKind.DateTimeUTC ? DateTimeKind.Utc : DateTimeKind.Unspecified);
}
else if (field != null && field is DateTimeField)
{
kind = ((DateTimeField)field).DateTimeKind;
}
d = DateTimeField.ToDateTimeKind(d, kind);
if (op == FilterOp.BW)
{
if (phase == 1)
{
sqlOp = "{0} >= {1} AND {0} < {2}";
d = d.AddDays(1);
}
}
else if (phase == 0)
{
if (op == FilterOp.NE || op == FilterOp.EQ)
{
value1 = d.ToSql();
value2 = d.AddDays(1).ToSql();
if (op == FilterOp.NE)
{
sqlOp = "NOT ({0} >= {1} AND {0} < {2})";
}
else
{
sqlOp = "{0} >= {1} AND {0} < {2}";
}
op = FilterOp.BW;
break;
}
else
{
if (op == FilterOp.GT)
{
op = FilterOp.GE;
d = d.AddDays(1);
}
else if (op == FilterOp.LE)
{
op = FilterOp.LT;
d = d.AddDays(1);
}
}
}
valueText = d.ToSql();
}
else // convert simple string value to sql string (duplicate quotes)
{
valueText = valueText.ToSql();
}
if (phase == 0)
{
value1 = valueText;
}
else
{
value2 = valueText;
}
// use second phase to parse value2 if operator is BW
if (op != FilterOp.BW)
{
break;
}
}
// format sql operator text with values
if (op == FilterOp.BW)
{
sb.AppendFormat(sqlOp, fieldExpr, value1, value2);
}
else
{
sb.AppendFormat(sqlOp, fieldExpr, value1);
}
}
else
{
sb.AppendFormat(sqlOp, fieldExpr);
}
}
if (inParens)
{
sb.Append(RPAREN);
}
if (hasOr)
{
sb.Append(RPAREN);
sb.Insert(0, LPAREN);
}
return(sb.ToString());
}
public FilterItem(FilterOp op, string pattern)
{
Op = op;
Regex = new Regex(pattern);
}
/// <summary>
/// Checks if the operator requires a value.</summary>
/// <param name="op">
/// Operator</param>
/// <returns>
/// True if the operator requires a value.</returns>
/// <remarks>
/// True, False, IsNull and IsNotNull operators doesn't require a value.</remarks>
internal static bool IsNeedsValue(this FilterOp op)
{
return(op != FilterOp.True && op != FilterOp.False && op != FilterOp.IsNull && op != FilterOp.IsNotNull);
}
/// <summary>
/// Checks if the operator is one of Contains and StartsWith.</summary>
/// <param name="op">
/// Operator</param>
/// <returns>
/// True if operator is Contains or StartsWith.</returns>
internal static bool IsLike(this FilterOp op)
{
return(op == FilterOp.StartsWith || op == FilterOp.Contains);
}
/// <summary>
/// Visitor pattern method for FilterOp
/// </summary>
/// <param name="op"> The FilterOp being visited </param>
/// <param name="n"> The Node that references the Op </param>
public virtual void Visit(FilterOp op, Node n)
{
VisitRelOpDefault(op, n);
}
public override void Visit(FilterOp op, System.Data.Entity.Core.Query.InternalTrees.Node n)
{
this.VisitNode(n.Child1);
this.VisitNode(n.Child0);
}
public override System.Data.Entity.Core.Query.InternalTrees.Node Visit(FilterOp op, System.Data.Entity.Core.Query.InternalTrees.Node n)
{
this.VisitChildrenReverse(n);
return(n);
}
public Filter(string colname, FilterOp op, object value)
{
this.Name = colname;
this.Op = op;
this.Value = value;
}
/// <summary>
/// Handler for a FilterOp. Usually delegates to VisitRelOpDefault.
///
/// There's one special case - where we have an ISOF predicate over a ScanTable. In that case, we attempt
/// to get a more "optimal" view; and return that optimal view
///
/// </summary>
/// <param name="op">the filterOp</param>
/// <param name="n">the node tree</param>
/// <returns></returns>
public override Node Visit(FilterOp op, Node n)
{
IsOfOp typeFilter;
if (IsOfTypeOverScanTable(n, out typeFilter))
{
var ret = ProcessScanTable(n.Child0, (ScanTableOp)n.Child0.Op, ref typeFilter);
if (typeFilter != null)
{
n.Child1 = VisitNode(n.Child1);
n.Child0 = ret;
ret = n;
}
return ret;
}
else
{
return VisitRelOpDefault(op, n);
}
}
// <summary>
// Copies a filterOp
// </summary>
// <param name="op"> The Op to Copy </param>
// <param name="n"> The Node that references the Op </param>
// <returns> A copy of the original Node that references a copy of the original Op </returns>
public override Node Visit(FilterOp op, Node n)
{
return CopyDefault(m_destCmd.CreateFilterOp(), n);
}
/// <summary>
/// FilterOp handling
///
/// Process the predicate child, and then the input child - since the
/// predicate child will probably have references to the input.
/// </summary>
/// <param name="op"></param>
/// <param name="n"></param>
public override void Visit(FilterOp op, Node n)
{
VisitNode(n.Child1); // visit predicate first
VisitNode(n.Child0); // then visit the relop input
}
public FilterApp(FilterApp lft, FilterApp rft, FilterOp fop)
{
m_filter = new Tuple <FilterApp, FilterApp, FilterOp>(lft, rft, fop);
multi = true;
}
