/// <summary>
/// Compile the given filter to run on an external (fx) xpath engine
/// </summary>
internal static OpcodeBlock CompileForExternalEngine(string expression, XmlNamespaceManager namespaces, object item, bool match)
{
// Compile...
XPathExpression xpathExpr = QueryMatcher.fxCompiler.Compile(expression);
// Fx will bind prefixes and functions here.
if (namespaces != null)
{
// There's a bug in System.Xml.XPath. If we pass an XsltContext to SetContext it won't throw if there's
// an undefined prefix.
if (namespaces is XsltContext)
{
// Lex the xpath to find all prefixes used
XPathLexer lexer = new XPathLexer(expression, false);
while (lexer.MoveNext())
{
string prefix = lexer.Token.Prefix;
if (prefix.Length > 0 && namespaces.LookupNamespace(prefix) == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new XsltException(SR.GetString(SR.FilterUndefinedPrefix, prefix)));
}
}
}
xpathExpr.SetContext(namespaces);
}
//
// FORCE the function to COMPILE - they won't bind namespaces unless we check the return type
//
if (XPathResultType.Error == xpathExpr.ReturnType)
{
// This should never be reached. The above property should throw if there's an error
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new XPathException(SR.GetString(SR.FilterCouldNotCompile, expression)));
}
OpcodeBlock codeBlock = new OpcodeBlock();
SingleFxEngineResultOpcode op;
if (!match)
{
op = new QuerySingleFxEngineResultOpcode();
}
else
{
op = new MatchSingleFxEngineResultOpcode();
}
op.XPath = xpathExpr;
op.Item = item;
codeBlock.Append(op);
return(codeBlock);
}
internal static OpcodeBlock CompileForExternalEngine(string expression, XmlNamespaceManager namespaces, object item, bool match)
{
SingleFxEngineResultOpcode opcode;
XPathExpression expression2 = fxCompiler.Compile(expression);
if (namespaces != null)
{
if (namespaces is XsltContext)
{
XPathLexer lexer = new XPathLexer(expression, false);
while (lexer.MoveNext())
{
string prefix = lexer.Token.Prefix;
if ((prefix.Length > 0) && (namespaces.LookupNamespace(prefix) == null))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new XsltException(System.ServiceModel.SR.GetString("FilterUndefinedPrefix", new object[] { prefix })));
}
}
}
expression2.SetContext(namespaces);
}
if (XPathResultType.Error == expression2.ReturnType)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new XPathException(System.ServiceModel.SR.GetString("FilterCouldNotCompile", new object[] { expression })));
}
OpcodeBlock block = new OpcodeBlock();
if (!match)
{
opcode = new QuerySingleFxEngineResultOpcode();
}
else
{
opcode = new MatchSingleFxEngineResultOpcode();
}
opcode.XPath = expression2;
opcode.Item = item;
block.Append(opcode);
return(block);
}