public static void Main(System.String[] args)
{
// first, we init the runtime engine. Defaults are fine.
try {
Velocity.Init();
} catch (System.Exception e) {
System.Console.Out.WriteLine("Problem initializing Velocity : " + e);
return;
}
// lets make a Context and put data into it
VelocityContext context = new VelocityContext();
context.Put("name", "Velocity");
context.Put("project", "Jakarta");
// lets render a template
StringWriter writer = new StringWriter();
try {
Velocity.MergeTemplate("example2.vm", context, writer);
} catch (System.Exception e) {
System.Console.Out.WriteLine("Problem merging template : " + e);
}
System.Console.Out.WriteLine(" template : " + writer.GetStringBuilder().ToString());
// lets dynamically 'create' our template
// and use the evaluate() method to render it
System.String s = "We are using $project $name to render this.";
writer = new StringWriter();
try {
Velocity.Evaluate(context, writer, "mystring", s);
} catch (ParseErrorException pee) {
// thrown if something is wrong with the
// syntax of our template string
System.Console.Out.WriteLine("ParseErrorException : " + pee);
} catch (MethodInvocationException mee) {
// thrown if a method of a reference
// called by the template
// throws an exception. That won't happen here
// as we aren't calling any methods in this
// example, but we have to catch them anyway
System.Console.Out.WriteLine("MethodInvocationException : " + mee);
} catch (System.Exception e) {
System.Console.Out.WriteLine("Exception : " + e);
}
System.Console.Out.WriteLine(" string : " + writer.GetStringBuilder().ToString());
}
public static bool Evaluate(IContext context, TextWriter writer, string logTag, Stream instream)
{
TextReader reader = null;
string text = null;
try
{
text = RuntimeSingleton.getString("input.encoding", "ISO-8859-1");
reader = new StreamReader(new StreamReader(instream, Encoding.GetEncoding(text)).BaseStream);
}
catch (IOException innerException)
{
string exceptionMessage = "Unsupported input encoding : " + text + " for template " + logTag;
throw new ParseErrorException(exceptionMessage, innerException);
}
return(Velocity.Evaluate(context, writer, logTag, reader));
}
public static bool InvokeVelocimacro(string vmName, string logTag, string[] parameters, IContext context, TextWriter writer)
{
bool result;
if (vmName == null || parameters == null || context == null || writer == null || logTag == null)
{
RuntimeSingleton.Error("Velocity.invokeVelocimacro() : invalid parameter");
result = false;
}
else if (!RuntimeSingleton.IsVelocimacro(vmName, logTag))
{
RuntimeSingleton.Error("Velocity.invokeVelocimacro() : VM '" + vmName + "' not registered.");
result = false;
}
else
{
StringBuilder stringBuilder = new StringBuilder("#");
stringBuilder.Append(vmName);
stringBuilder.Append("(");
for (int i = 0; i < parameters.Length; i++)
{
stringBuilder.Append(" $");
stringBuilder.Append(parameters[i]);
}
stringBuilder.Append(" )");
try
{
bool flag = Velocity.Evaluate(context, writer, logTag, stringBuilder.ToString());
result = flag;
return(result);
}
catch (System.Exception arg)
{
RuntimeSingleton.Error("Velocity.invokeVelocimacro() : error " + arg);
}
result = false;
}
return(result);
}
public static bool Evaluate(IContext context, TextWriter writer, string logTag, string instring)
{
return(Velocity.Evaluate(context, writer, logTag, new StringReader(instring)));
}