internal static OpcodeBlock CompileForInternalEngine(string xpath, XmlNamespaceManager nsManager, QueryCompilerFlags flags, IFunctionLibrary[] functionLibs, out ValueDataType returnType)
{
OpcodeBlock codeBlock;
returnType = ValueDataType.None;
if (0 == xpath.Length)
{
// 0 length XPaths always match
codeBlock = new OpcodeBlock();
codeBlock.Append(new PushBooleanOpcode(true)); // Always match by pushing true on the eval stack
}
else
{
// Try to parse the xpath. Bind to default function libraries
// The parser returns an expression tree
XPathParser parser = new XPathParser(xpath, nsManager, functionLibs);
XPathExpr parseTree = parser.Parse();
if (null == parseTree)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new QueryCompileException(QueryCompileError.CouldNotParseExpression));
}
returnType = parseTree.ReturnType;
// Compile the expression tree
XPathCompiler compiler = new XPathCompiler(flags);
codeBlock = compiler.Compile(parseTree);
}
return(codeBlock);
}
internal static OpcodeBlock CompileForInternalEngine(string xpath, XmlNamespaceManager nsManager, QueryCompilerFlags flags, IFunctionLibrary[] functionLibs, out ValueDataType returnType)
{
returnType = ValueDataType.None;
if (xpath.Length == 0)
{
OpcodeBlock block = new OpcodeBlock();
block.Append(new PushBooleanOpcode(true));
return(block);
}
XPathExpr expr = new XPathParser(xpath, nsManager, functionLibs).Parse();
if (expr == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new QueryCompileException(QueryCompileError.CouldNotParseExpression));
}
returnType = expr.ReturnType;
XPathCompiler compiler = new XPathCompiler(flags);
return(compiler.Compile(expr));
}
private XPathTokenID GetNodeTypeOrFunction(XPathParser.QName qname)
{
XPathTokenID namedType = this.GetNamedType(qname.Name);
if ((namedType & XPathTokenID.NodeType) == XPathTokenID.Unknown)
{
return XPathTokenID.Function;
}
if (qname.Prefix.Length > 0)
{
this.ThrowError(QueryCompileError.InvalidNodeType, qname.Prefix + ":" + qname.Name);
}
return namedType;
}
private XPathTokenID GetNamedOperator(XPathParser.QName qname)
{
if (qname.Prefix.Length != 0)
{
this.ThrowError(QueryCompileError.InvalidOperatorName, qname.Prefix + ":" + qname.Name);
}
XPathTokenID namedType = this.GetNamedType(qname.Name);
if (this.resolveKeywords && ((namedType & XPathTokenID.NamedOperator) == XPathTokenID.Unknown))
{
this.ThrowError(QueryCompileError.UnsupportedOperator, this.previousID.ToString() + "->" + qname.Name);
}
return namedType;
}
private XPathTokenID GetAxisName(XPathParser.QName qname)
{
if (qname.Prefix.Length != 0)
{
this.ThrowError(QueryCompileError.InvalidAxisSpecifier, qname.Prefix + ":" + qname.Name);
}
XPathTokenID namedType = this.GetNamedType(qname.Name);
if (this.resolveKeywords && ((namedType & XPathTokenID.Axis) == XPathTokenID.Unknown))
{
this.ThrowError(QueryCompileError.UnsupportedAxis, qname.Name);
}
return namedType;
}
private XPathTokenID GetNamedOperator(XPathParser.QName qname)
{
// Named operators can't have prefixes
if (qname.Prefix.Length != 0)
{
ThrowError(QueryCompileError.InvalidOperatorName, qname.Prefix + ":" + qname.Name);
}
// Make sure the type is 'NamedOperator'
XPathTokenID id = GetNamedType(qname.Name);
if (this.resolveKeywords && (id & XPathTokenID.NamedOperator) == 0)
{
ThrowError(QueryCompileError.UnsupportedOperator, this.previousID.ToString() + "->" + qname.Name);
}
return id;
}
internal void Set(XPathTokenID id, XPathParser.QName qname)
{
this.Set(id, qname.Name);
this.prefix = qname.Prefix;
}
private XPathTokenID GetNodeTypeOrFunction(XPathParser.QName qname)
{
XPathTokenID id = GetNamedType(qname.Name);
// If it's not a node type, it's lexed as a function
if ((id & XPathTokenID.NodeType) == 0)
{
id = XPathTokenID.Function;
}
else if (qname.Prefix.Length > 0)
{
// Node types don't have prefixes
ThrowError(QueryCompileError.InvalidNodeType, qname.Prefix + ":" + qname.Name);
}
return id;
}
private XPathTokenID GetAxisName(XPathParser.QName qname)
{
// Axes can't have prefixes
if (qname.Prefix.Length != 0)
{
ThrowError(QueryCompileError.InvalidAxisSpecifier, qname.Prefix + ":" + qname.Name);
}
// Make sure the type is 'Axis'
XPathTokenID id = GetNamedType(qname.Name);
if (this.resolveKeywords && (id & XPathTokenID.Axis) == 0)
{
ThrowError(QueryCompileError.UnsupportedAxis, qname.Name);
}
return id;
}
