public static bool Evaluate(IContext context, TextWriter writer, string logTag, TextReader reader)
{
SimpleNode simpleNode = null;
try
{
simpleNode = RuntimeSingleton.Parse(reader, logTag);
}
catch (ParseException ex)
{
throw new ParseErrorException(ex.Message, ex);
}
bool result;
if (simpleNode != null)
{
InternalContextAdapterImpl internalContextAdapterImpl = new InternalContextAdapterImpl(context);
internalContextAdapterImpl.PushCurrentTemplateName(logTag);
try
{
try
{
simpleNode.Init(internalContextAdapterImpl, RuntimeSingleton.RuntimeServices);
}
catch (System.Exception ex2)
{
RuntimeSingleton.Error(string.Concat(new object[]
{
"Velocity.evaluate() : init exception for tag = ",
logTag,
" : ",
ex2
}));
}
simpleNode.Render(internalContextAdapterImpl, writer);
}
finally
{
internalContextAdapterImpl.PopCurrentTemplateName();
}
result = true;
}
else
{
result = false;
}
return(result);
}
/// <summary>
/// Renders the input reader using the context into the output writer.
/// To be used when a template is dynamically constructed, or want to
/// use Velocity as a token replacer.
/// </summary>
/// <param name="context">context to use in rendering input string</param>
/// <param name="writer"> Writer in which to render the output</param>
/// <param name="logTag"> string to be used as the template name for log messages in case of error</param>
/// <param name="reader">Reader containing the VTL to be rendered</param>
/// <returns>true if successful, false otherwise. If false, see Velocity runtime log</returns>
public static bool Evaluate(IContext context, TextWriter writer, String logTag, TextReader reader)
{
SimpleNode nodeTree = null;
try
{
nodeTree = RuntimeSingleton.Parse(reader, logTag);
}
catch (ParseException parseException)
{
throw new ParseErrorException(parseException.Message, parseException);
}
// now we want to init and render
if (nodeTree != null)
{
InternalContextAdapterImpl internalContextAdapterImpl = new InternalContextAdapterImpl(context);
internalContextAdapterImpl.PushCurrentTemplateName(logTag);
try
{
try
{
nodeTree.Init(internalContextAdapterImpl, RuntimeSingleton.RuntimeServices);
}
catch (Exception exception)
{
RuntimeSingleton.Error(
string.Format("Velocity.evaluate() : init exception for tag = {0} : {1}", logTag, exception));
}
// now render, and let any exceptions fly
nodeTree.Render(internalContextAdapterImpl, writer);
}
finally
{
internalContextAdapterImpl.PopCurrentTemplateName();
}
return(true);
}
return(false);
}
