/// <summary>
/// Invokes a currently registered Velocimacro with the parms 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="params[]">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[] params_Renamed, IContext context, TextWriter writer)
{
/*
* check parms
*/
if (vmName == null || params_Renamed == null || context == null || writer == null || logTag == null)
{
ri.error("VelocityEngine.invokeVelocimacro() : invalid parameter");
return(false);
}
/*
* does the VM exist?
*/
if (!ri.isVelocimacro(vmName, logTag))
{
ri.error("VelocityEngine.invokeVelocimacro() : VM '" + vmName + "' not registered.");
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 < params_Renamed.Length; i++)
{
construct.Append(" $");
construct.Append(params_Renamed[i]);
}
construct.Append(" )");
try
{
bool retval = Evaluate(context, writer, logTag, construct.ToString());
return(retval);
}
catch (Exception e)
{
ri.error("VelocityEngine.invokeVelocimacro() : error " + e);
throw e;
}
}
