public static void LoadXml(string xml, Action <string, InvocationDelegate> callback)
{
LoadXmlNode(xml, new Action <string, XmlNode>((name, node) =>
{
XmlExpressionReader reader = new XmlExpressionReader();
XmlNode firstChild = null;
foreach (XmlNode child in node.ChildNodes)
{
if (child.NodeType == XmlNodeType.Element)
{
firstChild = child;
break;
}
}
//convert xml node to expression
Expression expr = reader.Read(firstChild);
CompileContext compile = new CompileContext();
//compile expression
var eval = compile.Compile(expr);
callback(name, eval);
}));
}
protected void Run(string xml, CompileContext compile = null, ExpressionContext ctx = null)
{
XmlDocument doc = new XmlDocument();
doc.LoadXml(xml);
var root = doc.DocumentElement;
if (ctx == null)
{
ctx = new ExpressionContext();
}
if (compile == null)
{
compile = new CompileContext();
}
var reader = new XmlExpressionReader();
foreach (XmlNode exprNode in root)
{
if (exprNode.NodeType != XmlNodeType.Element)
{
continue;
}
string testName = exprNode.Attributes["name"].Value;
Console.WriteLine("run start:" + testName);
var expr = reader.Read(exprNode, true, compile);
var eval = compile.Compile(expr);
object result = eval(ctx);
object assertResult = null;
var resultAttr = exprNode.Attributes["result"];
if (resultAttr != null)
{
Type assertResultType = exprNode.Attributes["resultType"] != null?Type.GetType(GetTypeName(exprNode.Attributes["resultType"].Value), true) : typeof(string);
string text = exprNode.Attributes["result"].Value;
if (assertResultType == typeof(Type))
{
assertResult = Type.GetType(text);
}
else
{
assertResult = Convert.ChangeType(text, assertResultType);
}
}
Assert.AreEqual(assertResult, result, string.Format("name: {0}", testName));
Console.WriteLine("run end:" + testName);
}
}
public void Sum()
{
string xml = Resource1.sum;
XmlDocument doc = new XmlDocument();
doc.LoadXml(xml);
var root = doc.DocumentElement;
var compile = new CompileContext();
var reader = new XmlExpressionReader();
var expr = reader.Read(root.FirstChild);
var eval = compile.Compile(expr);
var result = (Delegate)eval(null);
int n = 5;
Assert.AreEqual(RecursiveSum(n), result.DynamicInvoke(n));
}
public void Custom_Read()
{
string xml = Resource1.custom;
var reader = new XmlExpressionReader();
reader.AddReader("hello", "urn:my", (r) =>
{
Assert.AreEqual(r, reader);
var exprs = r.ReadChildExpressions();
var operand = exprs[0];
return(new HelloExpression(operand));
});
LoadXmlNode(xml, (name, node) =>
{
var expr = reader.Read(node.FirstChild);
CompileContext compile = new CompileContext();
var eval = compile.Compile(expr);
object result = eval(null);
Assert.AreEqual("Hello World", result);
});
}
