internal XPathCompiler(QueryCompilerFlags flags)
{
this.flags = flags;
this.pushInitialContext = false;
}
internal XPathCompiler(FilterOptimizer optimizer, QueryCompilerFlags flags)
{
this.optimizer = optimizer;
this.flags = flags;
this.pushInitialContext = false;
}
internal XPathCompiler(QueryCompilerFlags flags)
: this(new FilterOptimizer(SelectFunctionTree.standard), flags)
{
}
internal static OpcodeBlock CompileForInternalEngine(string xpath, XmlNamespaceManager ns, QueryCompilerFlags flags, out ValueDataType returnType)
{
return(CompileForInternalEngine(xpath, ns, flags, defaultFunctionLibs, out returnType));
}
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));
}
internal static OpcodeBlock CompileForInternalEngine(XPathMessageFilter filter, QueryCompilerFlags flags, IFunctionLibrary[] functionLibs, out ValueDataType returnType)
{
return(CompileForInternalEngine(filter.XPath.Trim(), filter.namespaces, flags, functionLibs, out returnType));
}
internal XPathCompiler(QueryCompilerFlags flags)
{
this.flags = flags;
this.pushInitialContext = false;
}
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 XPathCompiler(QueryCompilerFlags flags)
: this(new FilterOptimizer(SelectFunctionTree.standard), flags)
{
}
internal XPathCompiler(FilterOptimizer optimizer, QueryCompilerFlags flags)
{
this.optimizer = optimizer;
this.flags = flags;
this.pushInitialContext = false;
}
