public Object Invoke(Object o, Object value)
{
ArrayList al = new ArrayList();
if (putKey != null)
{
al.Add(putKey);
al.Add(value);
}
else
{
al.Add(value);
}
return(velMethod.Invoke(o, al.ToArray()));
}
/// <summary> invokes the method. Returns null if a problem, the
/// parameters return if the method returns something, or
/// an empty string "" if the method returns void
/// </summary>
/// <param name="instance">
/// </param>
/// <param name="context">
/// </param>
/// <returns> Result or null.
/// </returns>
/// <throws> MethodInvocationException </throws>
public override object Execute(object o, IInternalContextAdapter context)
{
/*
* new strategy (strategery!) for introspection. Since we want
* to be thread- as well as context-safe, we *must* do it now,
* at execution time. There can be no in-node caching,
* but if we are careful, we can do it in the context.
*/
IVelMethod method = null;
object[] params_Renamed = new object[paramCount];
try
{
/*
* sadly, we do need recalc the values of the args, as this can
* change from visit to visit
*/
System.Type[] paramClasses = paramCount > 0 ? new System.Type[paramCount] : new System.Collections.Generic.List <Type>().ToArray();
for (int j = 0; j < paramCount; j++)
{
params_Renamed[j] = GetChild(j + 1).Value(context);
if (params_Renamed[j] != null)
{
paramClasses[j] = params_Renamed[j].GetType();
}
}
/*
* check the cache
*/
MethodCacheKey mck = new MethodCacheKey(methodName, paramClasses);
IntrospectionCacheData icd = context.ICacheGet(mck);
/*
* like ASTIdentifier, if we have cache information, and the
* Class of Object instance is the same as that in the cache, we are
* safe.
*/
if (icd != null && (o != null && icd.ContextData == o.GetType()))
{
/*
* Get the method from the cache
*/
method = (IVelMethod)icd.Thingy;
}
else
{
/*
* otherwise, do the introspection, and then
* cache it
*/
method = rsvc.Uberspect.GetMethod(o, methodName, params_Renamed, new Info(TemplateName, Line, Column));
if ((method != null) && (o != null))
{
icd = new IntrospectionCacheData();
icd.ContextData = o.GetType();
icd.Thingy = method;
context.ICachePut(mck, icd);
}
}
/*
* if we still haven't gotten the method, either we are calling
* a method that doesn't exist (which is fine...) or I screwed
* it up.
*/
if (method == null)
{
if (strictRef)
{
// Create a parameter list for the exception Error message
System.Text.StringBuilder plist = new System.Text.StringBuilder();
for (int i = 0; i < params_Renamed.Length; i++)
{
System.Type param = paramClasses[i];
plist.Append(param == null ? "null" : param.FullName);
if (i < params_Renamed.Length - 1)
{
plist.Append(", ");
}
}
throw new MethodInvocationException("Object '" + o.GetType().FullName + "' does not contain method " + methodName + "(" + plist + ")", null, methodName, uberInfo.TemplateName, uberInfo.Line, uberInfo.Column);
}
else
{
return(null);
}
}
}
catch (MethodInvocationException mie)
{
/*
* this can come from the doIntrospection(), as the arg values
* are evaluated to find the right method signature. We just
* want to propogate it here, not do anything fancy
*/
throw mie;
}
/**
* pass through application level runtime exceptions
*/
catch (System.SystemException e)
{
throw e;
}
catch (System.Exception e)
{
/*
* can come from the doIntropection() also, from Introspector
*/
string msg = "ASTMethod.Execute() : exception from introspection";
log.Error(msg, e);
throw new VelocityException(msg, e);
}
try
{
/*
* Get the returned object. It may be null, and that is
* valid for something declared with a void return type.
* Since the caller is expecting something to be returned,
* as long as things are peachy, we can return an empty
* String so ASTReference() correctly figures out that
* all is well.
*/
object obj = method.Invoke(o, params_Renamed);
if (obj == null)
{
if (method.ReturnType == System.Type.GetType("System.Void"))
{
return("");
}
}
return(obj);
}
catch (System.Reflection.TargetInvocationException ite)
{
return(HandleInvocationException(o, context, ite.GetBaseException()));
}
/** Can also be thrown by method invocation **/
catch (System.ArgumentException t)
{
return(HandleInvocationException(o, context, t));
}
/**
* pass through application level runtime exceptions
*/
catch (System.SystemException e)
{
throw e;
}
catch (System.Exception e)
{
string msg = "ASTMethod.Execute() : exception invoking method '" + methodName + "' in " + o.GetType();
log.Error(msg, e);
throw new VelocityException(msg, e);
}
}