/// <summary>
/// Invokes a currently registered Velocimacro with the parameters provided
/// and places the rendered stream into the writer.
/// Note : currently only accepts args to the VM if they are in the context.
/// </summary>
/// <param name="vmName">name of Velocimacro to call</param>
/// <param name="logTag">string to be used for template name in case of error</param>
/// <param name="parameters">args used to invoke Velocimacro. In context key format :
/// eg "foo","bar" (rather than "$foo","$bar")
/// </param>
/// <param name="context">Context object containing data/objects used for rendering.</param>
/// <param name="writer"> Writer for output stream</param>
/// <returns>true if Velocimacro exists and successfully invoked, false otherwise.</returns>
public bool InvokeVelocimacro(String vmName, String logTag, String[] parameters, IContext context, TextWriter writer)
{
// check parameters
if (vmName == null || parameters == null || context == null || writer == null || logTag == null)
{
runtimeInstance.Error("VelocityEngine.invokeVelocimacro() : invalid parameter");
return(false);
}
// does the VM exist?
if (!runtimeInstance.IsVelocimacro(vmName, logTag))
{
runtimeInstance.Error(string.Format("VelocityEngine.invokeVelocimacro() : VM '{0}' not registered.", vmName));
return(false);
}
// now just create the VM call, and use evaluate
StringBuilder construct = new StringBuilder("#");
construct.Append(vmName);
construct.Append("(");
for (int i = 0; i < parameters.Length; i++)
{
construct.Append(" $");
construct.Append(parameters[i]);
}
construct.Append(" )");
try
{
bool retval = Evaluate(context, writer, logTag, construct.ToString());
return(retval);
}
catch (Exception e)
{
runtimeInstance.Error(string.Format("VelocityEngine.invokeVelocimacro() : error {0}", e));
throw;
}
}
