private XPathExpr ParseFilterExpression()
{
XPathExpr expr = this.ParsePrimaryExpression();
if (expr == null)
{
return(null);
}
XPathExpr expr2 = new XPathExpr(XPathExprType.Filter, expr.ReturnType);
expr2.Add(expr);
XPathExpr expr3 = this.ParsePredicateExpression();
if (expr3 == null)
{
return(expr);
}
this.EnsureReturnsNodeSet(expr);
expr2.Add(expr3);
while ((expr3 = this.ParsePredicateExpression()) != null)
{
expr2.Add(expr3);
}
return(expr2);
}
XPathExpr ParseFilterExpression()
{
XPathExpr primaryExpr = this.ParsePrimaryExpression();
if (null == primaryExpr)
{
return(null);
}
XPathExpr filterExpr = new XPathExpr(XPathExprType.Filter, primaryExpr.ReturnType);
filterExpr.Add(primaryExpr);
XPathExpr predicate = this.ParsePredicateExpression();
if (null != predicate)
{
EnsureReturnsNodeSet(primaryExpr);
//XPathExpr filterExpr = new XPathExpr(XPathExprType.Filter, ValueDataType.Sequence);
//filterExpr.Add(primaryExpr);
filterExpr.Add(predicate);
// Read in any additional predicates
while (null != (predicate = this.ParsePredicateExpression()))
{
filterExpr.Add(predicate);
}
return(filterExpr);
}
return(primaryExpr);
}
XPathExpr ParsePathExpression()
{
XPathExpr pathExpr = this.ParseLocationPath();
if (null != pathExpr)
{
return(pathExpr);
}
// Perhaps we have a filter expression
XPathExpr filterExpr = this.ParseFilterExpression();
if (null != filterExpr)
{
if (null != this.NextToken(XPathTokenID.Slash))
{
EnsureReturnsNodeSet(filterExpr);
// Is this a complex filter expression.. i.e. followed by further selections..
XPathExprList relPath = this.ParseRelativePath();
if (null == relPath)
{
this.ThrowError(QueryCompileError.InvalidLocationPath);
}
XPathExpr relPathExpr = new XPathExpr(XPathExprType.RelativePath, ValueDataType.Sequence, relPath);
pathExpr = new XPathExpr(XPathExprType.Path, ValueDataType.Sequence);
pathExpr.Add(filterExpr);
pathExpr.Add(relPathExpr);
}
else if (null != this.NextToken(XPathTokenID.DblSlash))
{
EnsureReturnsNodeSet(filterExpr);
XPathExprList relPath = this.ParseRelativePath();
if (null == relPath)
{
this.ThrowError(QueryCompileError.InvalidLocationPath);
}
XPathExpr relPathExpr = new XPathExpr(XPathExprType.RelativePath, ValueDataType.Sequence, relPath);
pathExpr = new XPathExpr(XPathExprType.Path, ValueDataType.Sequence);
pathExpr.Add(filterExpr);
pathExpr.Add(new XPathStepExpr(new NodeSelectCriteria(QueryAxisType.DescendantOrSelf, NodeQName.Empty, QueryNodeType.All)));
pathExpr.Add(relPathExpr);
}
else
{
pathExpr = filterExpr;
}
}
return(pathExpr);
}
private XPathExpr ParsePathExpression()
{
XPathExpr expr = this.ParseLocationPath();
if (expr != null)
{
return(expr);
}
XPathExpr expr2 = this.ParseFilterExpression();
if (expr2 == null)
{
return(expr);
}
if (this.NextToken(XPathTokenID.Slash) != null)
{
this.EnsureReturnsNodeSet(expr2);
XPathExprList subExpr = this.ParseRelativePath();
if (subExpr == null)
{
this.ThrowError(QueryCompileError.InvalidLocationPath);
}
XPathExpr expr3 = new XPathExpr(XPathExprType.RelativePath, ValueDataType.Sequence, subExpr);
expr = new XPathExpr(XPathExprType.Path, ValueDataType.Sequence);
expr.Add(expr2);
expr.Add(expr3);
return(expr);
}
if (this.NextToken(XPathTokenID.DblSlash) != null)
{
this.EnsureReturnsNodeSet(expr2);
XPathExprList list2 = this.ParseRelativePath();
if (list2 == null)
{
this.ThrowError(QueryCompileError.InvalidLocationPath);
}
XPathExpr expr4 = new XPathExpr(XPathExprType.RelativePath, ValueDataType.Sequence, list2);
expr = new XPathExpr(XPathExprType.Path, ValueDataType.Sequence);
expr.Add(expr2);
expr.Add(new XPathStepExpr(new NodeSelectCriteria(QueryAxisType.DescendantOrSelf, NodeQName.Empty, QueryNodeType.All)));
expr.Add(expr4);
return(expr);
}
return(expr2);
}
XPathExpr ParsePathExpression()
{
XPathExpr pathExpr = this.ParseLocationPath();
if (null != pathExpr)
{
return pathExpr;
}
// Perhaps we have a filter expression
XPathExpr filterExpr = this.ParseFilterExpression();
if (null != filterExpr)
{
if (null != this.NextToken(XPathTokenID.Slash))
{
EnsureReturnsNodeSet(filterExpr);
// Is this a complex filter expression.. i.e. followed by further selections..
XPathExprList relPath = this.ParseRelativePath();
if (null == relPath)
{
this.ThrowError(QueryCompileError.InvalidLocationPath);
}
XPathExpr relPathExpr = new XPathExpr(XPathExprType.RelativePath, ValueDataType.Sequence, relPath);
pathExpr = new XPathExpr(XPathExprType.Path, ValueDataType.Sequence);
pathExpr.Add(filterExpr);
pathExpr.Add(relPathExpr);
}
else if (null != this.NextToken(XPathTokenID.DblSlash))
{
EnsureReturnsNodeSet(filterExpr);
XPathExprList relPath = this.ParseRelativePath();
if (null == relPath)
{
this.ThrowError(QueryCompileError.InvalidLocationPath);
}
XPathExpr relPathExpr = new XPathExpr(XPathExprType.RelativePath, ValueDataType.Sequence, relPath);
pathExpr = new XPathExpr(XPathExprType.Path, ValueDataType.Sequence);
pathExpr.Add(filterExpr);
pathExpr.Add(new XPathStepExpr(new NodeSelectCriteria(QueryAxisType.DescendantOrSelf, NodeQName.Empty, QueryNodeType.All)));
pathExpr.Add(relPathExpr);
}
else
{
pathExpr = filterExpr;
}
}
return pathExpr;
}
XPathExpr ParseFilterExpression()
{
XPathExpr primaryExpr = this.ParsePrimaryExpression();
if (null == primaryExpr)
{
return null;
}
XPathExpr filterExpr = new XPathExpr(XPathExprType.Filter, primaryExpr.ReturnType);
filterExpr.Add(primaryExpr);
XPathExpr predicate = this.ParsePredicateExpression();
if (null != predicate)
{
EnsureReturnsNodeSet(primaryExpr);
//XPathExpr filterExpr = new XPathExpr(XPathExprType.Filter, ValueDataType.Sequence);
//filterExpr.Add(primaryExpr);
filterExpr.Add(predicate);
// Read in any additional predicates
while (null != (predicate = this.ParsePredicateExpression()))
{
filterExpr.Add(predicate);
}
return filterExpr;
}
return primaryExpr;
}
private XPathExpr ParsePathExpression()
{
XPathExpr expr = this.ParseLocationPath();
if (expr != null)
{
return expr;
}
XPathExpr expr2 = this.ParseFilterExpression();
if (expr2 == null)
{
return expr;
}
if (this.NextToken(XPathTokenID.Slash) != null)
{
this.EnsureReturnsNodeSet(expr2);
XPathExprList subExpr = this.ParseRelativePath();
if (subExpr == null)
{
this.ThrowError(QueryCompileError.InvalidLocationPath);
}
XPathExpr expr3 = new XPathExpr(XPathExprType.RelativePath, ValueDataType.Sequence, subExpr);
expr = new XPathExpr(XPathExprType.Path, ValueDataType.Sequence);
expr.Add(expr2);
expr.Add(expr3);
return expr;
}
if (this.NextToken(XPathTokenID.DblSlash) != null)
{
this.EnsureReturnsNodeSet(expr2);
XPathExprList list2 = this.ParseRelativePath();
if (list2 == null)
{
this.ThrowError(QueryCompileError.InvalidLocationPath);
}
XPathExpr expr4 = new XPathExpr(XPathExprType.RelativePath, ValueDataType.Sequence, list2);
expr = new XPathExpr(XPathExprType.Path, ValueDataType.Sequence);
expr.Add(expr2);
expr.Add(new XPathStepExpr(new NodeSelectCriteria(QueryAxisType.DescendantOrSelf, NodeQName.Empty, QueryNodeType.All)));
expr.Add(expr4);
return expr;
}
return expr2;
}
private XPathExpr ParseFilterExpression()
{
XPathExpr expr = this.ParsePrimaryExpression();
if (expr == null)
{
return null;
}
XPathExpr expr2 = new XPathExpr(XPathExprType.Filter, expr.ReturnType);
expr2.Add(expr);
XPathExpr expr3 = this.ParsePredicateExpression();
if (expr3 == null)
{
return expr;
}
this.EnsureReturnsNodeSet(expr);
expr2.Add(expr3);
while ((expr3 = this.ParsePredicateExpression()) != null)
{
expr2.Add(expr3);
}
return expr2;
}