public override IBELObject ValueOf(string name, System.Collections.ArrayList arguments, ExecutionContext ctx)
{
Hashtable members = ctx.CurrentFederation.GetTopicProperties(Name);
string val = (string)(members[name]);
if (val == null)
return null;
val = val.Trim();
bool isBlock = val.StartsWith("{");
if (!isBlock)
return new BELString(val);
// It's a block, so fire up the interpreter
if (!val.EndsWith("}"))
throw new ExecutionException("Topic member " + name + " defined in " + Name.Fullname + " is not well-formed; missing closing '}' for code block.");
ContentBase cb = CurrentFederation.ContentBaseForTopic(Name);
TopicContext newContext = new TopicContext(ctx.CurrentFederation, cb, CurrentTopicInfo);
BehaviorInterpreter interpreter = new BehaviorInterpreter(val, CurrentFederation, CurrentFederation.WikiTalkVersion, ctx.Presenter);
if (!interpreter.Parse())
throw new ExecutionException("Parsing error evaluating topic member " + name + " defined in " + Name.Fullname + ": " + interpreter.ErrorString);
IBELObject b1 = interpreter.EvaluateToObject(newContext, ctx.ExternalWikiMap);
if (b1 == null)
throw new ExecutionException("Error while evaluating topic member " + name + " defined in " + Name.Fullname + ": " + interpreter.ErrorString);
Block block = (Block)b1;
ArrayList evaluatedArgs = new ArrayList();
foreach (object each in arguments)
{
IBELObject add = null;
if (each != null && each is IBELObject)
add = each as IBELObject;
else
{
ExposableParseTreeNode ptn = each as ExposableParseTreeNode;
add = ptn.Expose(ctx);
}
evaluatedArgs.Add(add);
}
InvocationFrame invocationFrame = new InvocationFrame();
ctx.PushFrame(invocationFrame);
TopicScope topicScope = new TopicScope(null, this);
ctx.PushScope(topicScope); // make sure we can use local references
IBELObject answer = block.Value(ctx, evaluatedArgs);
ctx.PopScope();
ctx.PopFrame();
// make sure to transfer any new cache rules
// BELTODO - want a test case for this
foreach (CacheRule r in interpreter.CacheRules)
ctx.AddCacheRule(r);
return answer;
}
private IBELObject BorderPropertyFromTopic(AbsoluteTopicName relativeToTopic, AbsoluteTopicName abs, Border border, CompositeCacheRule rule)
{
ContentBase cb = ContentBaseForTopic(abs);
if (cb == null)
{
return null;
}
rule.Add(cb.CacheRuleForAllPossibleInstancesOfTopic(abs));
if (!cb.TopicExists(abs))
{
return null;
}
// OK, looks like the topic exist -- let's see if the property is there
string borderPropertyName = BorderPropertyName(border);
string prop = GetTopicProperty(abs, borderPropertyName);
if (prop == null || prop == "")
{
return null;
}
// Yup, so evaluate it!
string code = "federation.GetTopic(\"" + abs.Fullname + "\")." + borderPropertyName + "(federation.GetTopicInfo(\"" + relativeToTopic + "\"))";
BehaviorInterpreter interpreter = new BehaviorInterpreter(code, this, this.WikiTalkVersion, null);
if (!interpreter.Parse())
{
throw new Exception("Border property expression failed to parse.");
}
TopicContext topicContext = new TopicContext(this, this.ContentBaseForTopic(abs), new TopicInfo(this, abs));
IBELObject obj = interpreter.EvaluateToObject(topicContext, null);
if (interpreter.ErrorString != null)
{
obj = new BELString(interpreter.ErrorString);
}
foreach (CacheRule r in interpreter.CacheRules)
{
rule.Add(r);
}
return obj;
}
public override IBELObject ValueOf(string name, System.Collections.ArrayList arguments, ExecutionContext ctx)
{
TopicPropertyCollection members = ctx.CurrentFederation.GetTopicProperties(Name);
string val = members[name].LastValue;
if (val == null)
return null;
val = val.Trim();
bool isBlock = val.StartsWith("{");
if (!isBlock)
return new BELString(val);
// It's a block, so fire up the interpreter
if (!val.EndsWith("}"))
throw new ExecutionException(ctx.CurrentLocation, "Topic member " + name + " defined in " + Name.DottedName + " is not well-formed; missing closing '}' for code block.");
NamespaceManager cb = CurrentFederation.NamespaceManagerForTopic(Name);
TopicContext newContext = new TopicContext(ctx.CurrentFederation, cb, CurrentTopicInfo);
BehaviorInterpreter interpreter = new BehaviorInterpreter(Name.DottedName + "#" + name, val, CurrentFederation, CurrentFederation.WikiTalkVersion, ctx.Presenter);
if (!interpreter.Parse())
throw new ExecutionException(ctx.CurrentLocation, "Syntax error in " + interpreter.ErrorString);
IBELObject b1 = interpreter.EvaluateToObject(newContext, ctx.ExternalWikiMap);
if (b1 == null)
throw new ExecutionException(ctx.CurrentLocation, "Execution error in " + interpreter.ErrorString);
Block block = (Block) b1;
ArrayList evaluatedArgs = new ArrayList();
foreach (object each in arguments)
{
IBELObject add = null;
if (each != null && each is IBELObject)
add = each as IBELObject;
else
{
ExposableParseTreeNode ptn = each as ExposableParseTreeNode;
add = ptn.Expose(ctx);
}
evaluatedArgs.Add(add);
}
InvocationFrame invocationFrame = new InvocationFrame();
ctx.PushFrame(invocationFrame);
TopicScope topicScope = new TopicScope(null, this);
ctx.PushScope(topicScope); // make sure we can use local references
IBELObject answer = block.Value(ctx, evaluatedArgs);
ctx.PopScope();
ctx.PopFrame();
return answer;
}
private IBELObject BorderPropertyFromTopic(QualifiedTopicRevision relativeToTopic, QualifiedTopicRevision abs, Border border)
{
NamespaceManager namespaceManager = NamespaceManagerForTopic(abs);
if (namespaceManager == null)
{
return null;
}
if (!namespaceManager.TopicExists(abs.LocalName, ImportPolicy.DoNotIncludeImports))
{
return null;
}
// OK, looks like the topic exist -- let's see if the propertyName is there
string borderPropertyName = BorderPropertyName(border);
string prop = GetTopicPropertyValue(abs, borderPropertyName);
if (prop == null || prop == "")
{
return null;
}
// Yup, so evaluate it!
string code = "federation.GetTopic(\"" + abs.DottedName + "\")." + borderPropertyName + "(federation.GetTopicInfo(\"" + relativeToTopic + "\"))";
BehaviorInterpreter interpreter = new BehaviorInterpreter(abs.DottedName + "#" + borderPropertyName, code, this, this.WikiTalkVersion, null);
if (!interpreter.Parse())
{
throw new Exception("Border property expression failed to parse.");
}
TopicContext topicContext = new TopicContext(this, this.NamespaceManagerForTopic(abs), new TopicVersionInfo(this, abs));
IBELObject obj = interpreter.EvaluateToObject(topicContext, null);
if (interpreter.ErrorString != null)
{
obj = new BELString(interpreter.ErrorString);
}
return obj;
}
