public static string ToString(SQLTree tree)
{
switch (tree.Type)
{
case SQLFilterLexer.STRING:
case SQLFilterLexer.ID:
case SQLFilterLexer.INT:
case SQLFilterLexer.IPV4:
return tree.Text;
case SQLFilterLexer.TRUE:
return "TRUE";
case SQLFilterLexer.FALSE:
return "FALSE";
case SQLFilterLexer.STRING_EXPR:
return toStringStringExpr(tree);
case SQLFilterLexer.BOOL_EXPR:
return toStringBoolExpr((SQLTree)tree.Children[0]);
case SQLFilterLexer.ENUM_EXPR:
return toStringEnumExpr((SQLTree)tree.Children[0]);
case SQLFilterLexer.IP_EXPR:
case SQLFilterLexer.NUM_EXPR:
return toStringNumExpr((SQLTree)tree.Children[0]);
case SQLFilterLexer.NOT_AND:
return String.Format("NOT {0}", toStringAndGroup(tree.Children));
case SQLFilterLexer.NOT_OR:
return String.Format("NOT {0}", toStringOrGroup(tree.Children));
case SQLFilterLexer.AND:
return toStringAndGroup(tree.Children);
case SQLFilterLexer.OR:
return toStringOrGroup(tree.Children);
}
return String.Empty;
}
private static string toStringStringExpr(SQLTree tree)
{
if (tree.Children[0].Type == SQLFilterLexer.NOT)
{
return(ToStringNegate((StringTree)tree.Children[0].GetChild(0)));
}
return(ToString((StringTree)tree.Children[0]));
}
private static string toStringEnumExpr(SQLTree tree)
{
switch (tree.Type)
{
case SQLFilterLexer.EQUALS:
return String.Format(@"{0} = '{1}'", tree.Children[0].ToString(), tree.Children[1].ToString());
case SQLFilterLexer.NOTEQUALS:
return String.Format(@"{0} <> '{1}'", tree.Children[0].ToString(), tree.Children[1].ToString());
}
return String.Empty;
}
private static string toStringEnumExpr(SQLTree tree)
{
switch (tree.Type)
{
case SQLFilterLexer.EQUALS:
return(String.Format(@"{0} = '{1}'", tree.Children[0].ToString(), tree.Children[1].ToString()));
case SQLFilterLexer.NOTEQUALS:
return(String.Format(@"{0} <> '{1}'", tree.Children[0].ToString(), tree.Children[1].ToString()));
}
return(String.Empty);
}
private static FilterTree createDefaultExpression(string property, int exprType, int opType, int constType, string constant)
{
SQLTree root = new SQLTree(exprType);
SQLTree op = new SQLTree(opType);
SQLTree id = new SQLTree(new CommonToken(SQLFilterLexer.ID, property));
SQLTree constNode = new SQLTree(new CommonToken(constType, constant));
op.AddChild(id);
op.AddChild(constNode);
root.AddChild(op);
constNode.MarkAsDirty();
id.IsDirty = true;
root.IsLeaf = true;
return(root);
}
private static SQLTree createDefaultStringExpression(string property)
{
SQLTree root = new SQLTree(SQLFilterLexer.STRING_EXPR);
StringTree op = new StringTree(StringPatternLexer.IS);
SQLTree id = new SQLTree(new CommonToken(SQLFilterLexer.ID, property));
StringTree constant = new StringTree(new CommonToken(StringPatternLexer.TEXT, ""));
op.AddChild(id);
op.AddChild(constant);
root.AddChild(op);
constant.MarkAsDirty();
id.IsDirty = true;
root.IsLeaf = true;
return(root);
}
// If node was invalid returns true
public static bool NormalizeNode(SQLTree node)
{
if (!node.IsLeaf)
{
return(false);
}
if (!Filter <T> .VisibleProperties.ContainsKey(node.Children[0].GetChild(0).Text) || node.Type != Filter <T> .VisibleProperties[node.Children[0].GetChild(0).Text].Item1)
{
ITree parent = node.Parent;
parent.DeleteChild(0);
parent.FreshenParentAndChildIndexes();
return(true);
}
if (node.Type == SQLFilterLexer.NUM_EXPR)
{
((FilterTree)node.Children[0].GetChild(1)).SubType = Filter <T> .VisibleProperties[node.Children[0].GetChild(0).Text].Item2;
((FilterTree)node.Children[0].GetChild(0)).SubType = Filter <T> .VisibleProperties[node.Children[0].GetChild(0).Text].Item2;
}
else if (node.Type == SQLFilterLexer.BOOL_EXPR)
{
((FilterTree)node.Children[0].GetChild(0)).SubType = Filter <T> .VisibleProperties[node.Children[0].GetChild(0).Text].Item2;
}
else if (node.Type == SQLFilterLexer.ENUM_EXPR)
{
((FilterTree)node.Children[0].GetChild(1)).SubType = SQLFilterLexer.ENUM;
((FilterTree)node.Children[0].GetChild(0)).SubType = -1;
}
else
{
// cleanup
foreach (var firstChild in node.Children.Cast <FilterTree>())
{
firstChild.SubType = -1;
foreach (var secondChild in firstChild.Children.Cast <FilterTree>())
{
secondChild.SubType = -1;
}
}
}
return(false);
}
private static string toStringNumExpr(SQLTree tree)
{
switch(tree.Type)
{
case SQLFilterLexer.EQUALS:
return String.Format("{0} = {1}", tree.Children[0].ToString(), tree.Children[1].ToString());
case SQLFilterLexer.NOTEQUALS:
return String.Format("{0} <> {1}", tree.Children[0].ToString(), tree.Children[1].ToString());
case SQLFilterLexer.GREATER:
return String.Format("{0} > {1}", tree.Children[0].ToString(), tree.Children[1].ToString());
case SQLFilterLexer.LESSER:
return String.Format("{0} < {1}", tree.Children[0].ToString(), tree.Children[1].ToString());
case SQLFilterLexer.GREATEROREQUALS:
return String.Format("{0} >= {1}", tree.Children[0].ToString(), tree.Children[1].ToString());
case SQLFilterLexer.LESSEROREQUALS:
return String.Format("{0} <= {1}", tree.Children[0].ToString(), tree.Children[1].ToString());
}
return String.Empty;
}
public static string ToString(SQLTree tree)
{
switch (tree.Type)
{
case SQLFilterLexer.STRING:
case SQLFilterLexer.ID:
case SQLFilterLexer.INT:
case SQLFilterLexer.IPV4:
return(tree.Text);
case SQLFilterLexer.TRUE:
return("TRUE");
case SQLFilterLexer.FALSE:
return("FALSE");
case SQLFilterLexer.STRING_EXPR:
return(toStringStringExpr(tree));
case SQLFilterLexer.BOOL_EXPR:
return(toStringBoolExpr((SQLTree)tree.Children[0]));
case SQLFilterLexer.ENUM_EXPR:
return(toStringEnumExpr((SQLTree)tree.Children[0]));
case SQLFilterLexer.IP_EXPR:
case SQLFilterLexer.NUM_EXPR:
return(toStringNumExpr((SQLTree)tree.Children[0]));
case SQLFilterLexer.NOT_AND:
return(String.Format("NOT {0}", toStringAndGroup(tree.Children)));
case SQLFilterLexer.NOT_OR:
return(String.Format("NOT {0}", toStringOrGroup(tree.Children)));
case SQLFilterLexer.AND:
return(toStringAndGroup(tree.Children));
case SQLFilterLexer.OR:
return(toStringOrGroup(tree.Children));
}
return(String.Empty);
}
public static bool NormalizeNodes(SQLTree node)
{
bool broken = NormalizeNode(node);
if (node.Children == null)
{
return(broken);
}
for (int i = 0; i < node.Children.Count; i++)
{
SQLTree sqlTree = node.Children[i] as SQLTree;
if (sqlTree != null)
{
if (NormalizeNodes(sqlTree))
{
i--;
}
}
}
return(broken);
}
private static Expression compilePropertyNode(SQLTree node, ParameterExpression param)
{
Expression property = Expression.Property(param, node.Text);
switch (node.SubType)
{
case SQLFilterLexer.BOOL:
return(normalizeNullToFalse(Expression.TypeAs(property, typeof(bool?))));
case SQLFilterLexer.INT8:
return(Expression.TypeAs(property, typeof(byte?)));
case SQLFilterLexer.INT16:
return(Expression.TypeAs(property, typeof(short?)));
case SQLFilterLexer.INT32:
return(Expression.TypeAs(property, typeof(int?)));
case SQLFilterLexer.INT64:
return(Expression.TypeAs(property, typeof(long?)));
}
return(property);
}
private static string toStringNumExpr(SQLTree tree)
{
switch (tree.Type)
{
case SQLFilterLexer.EQUALS:
return(String.Format("{0} = {1}", tree.Children[0].ToString(), tree.Children[1].ToString()));
case SQLFilterLexer.NOTEQUALS:
return(String.Format("{0} <> {1}", tree.Children[0].ToString(), tree.Children[1].ToString()));
case SQLFilterLexer.GREATER:
return(String.Format("{0} > {1}", tree.Children[0].ToString(), tree.Children[1].ToString()));
case SQLFilterLexer.LESSER:
return(String.Format("{0} < {1}", tree.Children[0].ToString(), tree.Children[1].ToString()));
case SQLFilterLexer.GREATEROREQUALS:
return(String.Format("{0} >= {1}", tree.Children[0].ToString(), tree.Children[1].ToString()));
case SQLFilterLexer.LESSEROREQUALS:
return(String.Format("{0} <= {1}", tree.Children[0].ToString(), tree.Children[1].ToString()));
}
return(String.Empty);
}
private static string toStringStringExpr(SQLTree tree)
{
if (tree.Children[0].Type == SQLFilterLexer.NOT)
return ToStringNegate((StringTree)tree.Children[0].GetChild(0));
return ToString((StringTree)tree.Children[0]);
}
private static string toStringBoolExpr(SQLTree tree)
{
return String.Format(@"{0} IS {1}", tree.Children[0].ToString(), tree.Children[1].ToString());
}
public static Expression Compile(SQLTree node, ParameterExpression param)
{
switch (node.Type)
{
// Leaf
case SQLFilterLexer.ID:
return compilePropertyNode(node, param);
// IP expr
case SQLFilterLexer.IP_EXPR:
return compileIP((FilterTree)node.Children[0], param);
case SQLFilterLexer.IPV4:
IPAddress parsed = IPAddress.Parse(node.Text);
return Expression.Constant(parsed);
// Enum expr
case SQLFilterLexer.ENUM_EXPR:
return compileEnum((FilterTree)node.Children[0], param);
// Bool expr
case SQLFilterLexer.BOOL_EXPR:
return ((FilterTree)node.Children[0]).Compile(param);
case SQLFilterLexer.IS:
if (node.Children[1].Type == SQLFilterLexer.TRUE)
return ((FilterTree)node.Children[0]).Compile(param);
if (node.Children[1].Type == SQLFilterLexer.FALSE)
return Expression.Not(((FilterTree)node.Children[0]).Compile(param));
break;
// Num Expr
case SQLFilterLexer.NUM_EXPR:
return ((FilterTree)node.Children[0]).Compile(param);
case SQLFilterLexer.INT:
return compileNumConstantNode(node);
case SQLFilterLexer.LESSER:
return Expression.LessThan(
((FilterTree)node.Children[0]).Compile(param),
((FilterTree)node.Children[1]).Compile(param));
case SQLFilterLexer.LESSEROREQUALS:
return Expression.LessThanOrEqual(
((FilterTree)node.Children[0]).Compile(param),
((FilterTree)node.Children[1]).Compile(param));
case SQLFilterLexer.GREATER:
return Expression.GreaterThan(
((FilterTree)node.Children[0]).Compile(param),
((FilterTree)node.Children[1]).Compile(param));
case SQLFilterLexer.GREATEROREQUALS:
return Expression.GreaterThanOrEqual(
((FilterTree)node.Children[0]).Compile(param),
((FilterTree)node.Children[1]).Compile(param));
case SQLFilterLexer.EQUALS:
return Expression.Equal(
((FilterTree)node.Children[0]).Compile(param),
((FilterTree)node.Children[1]).Compile(param));
case SQLFilterLexer.NOTEQUALS:
return Expression.NotEqual(
((FilterTree)node.Children[0]).Compile(param),
((FilterTree)node.Children[1]).Compile(param));
// String Expr
case SQLFilterLexer.STRING_EXPR:
if (node.Children[0] is SQLTree && node.Children[0].Type == SQLFilterLexer.NOT)
return Expression.Not(((StringTree)node.Children[0].GetChild(0)).Compile(param));
else
return ((StringTree)node.Children[0]).Compile(param);
// Expr groups
case SQLFilterLexer.AND:
return compileAnd(node.Children, param);
case SQLFilterLexer.OR:
return compileOr(node.Children, param);
case SQLFilterLexer.NOT_AND:
return Expression.Not(compileAnd(node.Children, param));
case SQLFilterLexer.NOT_OR:
return Expression.Not(compileOr(node.Children, param));
}
return null;
}
private static string toStringBoolExpr(SQLTree tree)
{
return(String.Format(@"{0} IS {1}", tree.Children[0].ToString(), tree.Children[1].ToString()));
}
private static Expression compileNumConstantNode(SQLTree node)
{
switch (node.SubType)
{
case SQLFilterLexer.INT8:
{
BigInteger value = BigInteger.Parse(node.Text);
if (value <= Byte.MinValue)
{
return(Expression.Constant(Byte.MinValue, typeof(byte?)));
}
if (value >= Byte.MaxValue)
{
return(Expression.Constant(Byte.MaxValue, typeof(byte?)));
}
return(Expression.Constant((byte?)value, typeof(byte?)));
}
case SQLFilterLexer.INT16:
{
BigInteger value = BigInteger.Parse(node.Text);
if (value <= Int16.MinValue)
{
return(Expression.Constant(Int16.MinValue, typeof(short?)));
}
if (value >= Int16.MaxValue)
{
return(Expression.Constant(Int16.MaxValue, typeof(short?)));
}
return(Expression.Constant((short?)value, typeof(short?)));
}
case SQLFilterLexer.INT32:
{
BigInteger value = BigInteger.Parse(node.Text);
if (value <= Int32.MinValue)
{
return(Expression.Constant(Int32.MinValue, typeof(int?)));
}
if (value >= Int32.MaxValue)
{
return(Expression.Constant(Int32.MaxValue, typeof(int?)));
}
return(Expression.Constant((int?)value, typeof(int?)));
}
case SQLFilterLexer.INT64:
{
BigInteger value = BigInteger.Parse(node.Text);
if (value <= Int64.MinValue)
{
return(Expression.Constant(Int64.MinValue, typeof(long?)));
}
if (value >= Int64.MaxValue)
{
return(Expression.Constant(Int64.MaxValue, typeof(long?)));
}
return(Expression.Constant((long?)value, typeof(long?)));
}
}
return(Expression.Constant(BigInteger.Parse(node.Text), typeof(BigInteger?)));
}
public static Expression Compile(SQLTree node, ParameterExpression param)
{
switch (node.Type)
{
// Leaf
case SQLFilterLexer.ID:
return(compilePropertyNode(node, param));
// IP expr
case SQLFilterLexer.IP_EXPR:
return(compileIP((FilterTree)node.Children[0], param));
case SQLFilterLexer.IPV4:
IPAddress parsed = IPAddress.Parse(node.Text);
return(Expression.Constant(parsed));
// Enum expr
case SQLFilterLexer.ENUM_EXPR:
return(compileEnum((FilterTree)node.Children[0], param));
// Bool expr
case SQLFilterLexer.BOOL_EXPR:
return(((FilterTree)node.Children[0]).Compile(param));
case SQLFilterLexer.IS:
if (node.Children[1].Type == SQLFilterLexer.TRUE)
{
return(((FilterTree)node.Children[0]).Compile(param));
}
if (node.Children[1].Type == SQLFilterLexer.FALSE)
{
return(Expression.Not(((FilterTree)node.Children[0]).Compile(param)));
}
break;
// Num Expr
case SQLFilterLexer.NUM_EXPR:
return(((FilterTree)node.Children[0]).Compile(param));
case SQLFilterLexer.INT:
return(compileNumConstantNode(node));
case SQLFilterLexer.LESSER:
return(Expression.LessThan(
((FilterTree)node.Children[0]).Compile(param),
((FilterTree)node.Children[1]).Compile(param)));
case SQLFilterLexer.LESSEROREQUALS:
return(Expression.LessThanOrEqual(
((FilterTree)node.Children[0]).Compile(param),
((FilterTree)node.Children[1]).Compile(param)));
case SQLFilterLexer.GREATER:
return(Expression.GreaterThan(
((FilterTree)node.Children[0]).Compile(param),
((FilterTree)node.Children[1]).Compile(param)));
case SQLFilterLexer.GREATEROREQUALS:
return(Expression.GreaterThanOrEqual(
((FilterTree)node.Children[0]).Compile(param),
((FilterTree)node.Children[1]).Compile(param)));
case SQLFilterLexer.EQUALS:
return(Expression.Equal(
((FilterTree)node.Children[0]).Compile(param),
((FilterTree)node.Children[1]).Compile(param)));
case SQLFilterLexer.NOTEQUALS:
return(Expression.NotEqual(
((FilterTree)node.Children[0]).Compile(param),
((FilterTree)node.Children[1]).Compile(param)));
// String Expr
case SQLFilterLexer.STRING_EXPR:
if (node.Children[0] is SQLTree && node.Children[0].Type == SQLFilterLexer.NOT)
{
return(Expression.Not(((StringTree)node.Children[0].GetChild(0)).Compile(param)));
}
else
{
return(((StringTree)node.Children[0]).Compile(param));
}
// Expr groups
case SQLFilterLexer.AND:
return(compileAnd(node.Children, param));
case SQLFilterLexer.OR:
return(compileOr(node.Children, param));
case SQLFilterLexer.NOT_AND:
return(Expression.Not(compileAnd(node.Children, param)));
case SQLFilterLexer.NOT_OR:
return(Expression.Not(compileOr(node.Children, param)));
}
return(null);
}
private static Expression compileNumConstantNode(SQLTree node)
{
switch (node.SubType)
{
case SQLFilterLexer.INT8:
{
BigInteger value = BigInteger.Parse(node.Text);
if (value <= Byte.MinValue)
return Expression.Constant(Byte.MinValue, typeof(byte?));
if (value >= Byte.MaxValue)
return Expression.Constant(Byte.MaxValue, typeof(byte?));
return Expression.Constant((byte?)value, typeof(byte?));
}
case SQLFilterLexer.INT16:
{
BigInteger value = BigInteger.Parse(node.Text);
if (value <= Int16.MinValue)
return Expression.Constant(Int16.MinValue, typeof(short?));
if (value >= Int16.MaxValue)
return Expression.Constant(Int16.MaxValue, typeof(short?));
return Expression.Constant((short?)value, typeof(short?));
}
case SQLFilterLexer.INT32:
{
BigInteger value = BigInteger.Parse(node.Text);
if (value <= Int32.MinValue)
return Expression.Constant(Int32.MinValue, typeof(int?));
if (value >= Int32.MaxValue)
return Expression.Constant(Int32.MaxValue, typeof(int?));
return Expression.Constant((int?)value, typeof(int?));
}
case SQLFilterLexer.INT64:
{
BigInteger value = BigInteger.Parse(node.Text);
if (value <= Int64.MinValue)
return Expression.Constant(Int64.MinValue, typeof(long?));
if (value >= Int64.MaxValue)
return Expression.Constant(Int64.MaxValue, typeof(long?));
return Expression.Constant((long?)value, typeof(long?));
}
}
return Expression.Constant(BigInteger.Parse(node.Text), typeof(BigInteger?));
}
private static Expression compilePropertyNode(SQLTree node, ParameterExpression param)
{
Expression property = Expression.Property(param, node.Text);
switch (node.SubType)
{
case SQLFilterLexer.BOOL:
return normalizeNullToFalse(Expression.TypeAs(property, typeof(bool?)));
case SQLFilterLexer.INT8:
return Expression.TypeAs(property, typeof(byte?));
case SQLFilterLexer.INT16:
return Expression.TypeAs(property, typeof(short?));
case SQLFilterLexer.INT32:
return Expression.TypeAs(property, typeof(int?));
case SQLFilterLexer.INT64:
return Expression.TypeAs(property, typeof(long?));
}
return property;
}
