public InterpretedTemplate(String template, String sourceName, Engine engine) {
this.template = template;
this.engine = engine;
this.sourceName = sourceName;
tokenStream =
new TokenStream(sourceName, template, engine.getExprStartToken(), engine.getExprEndToken());
tokenStream.prefill();
}
@Override
@SuppressWarnings("unchecked")
public synchronized Set<String> getUsedVariables() {
if (this.usedVariables != null) {
return this.usedVariables;
}
this.usedVariables = new TreeSet<String>();
final Engine engine = new Engine();
final ScopedMap scopedMap = new ScopedMap(Collections.EMPTY_MAP);
ProcessListener processListener =
new ProcessListener() {
@Override
public void log(TemplateContext context, Token token, Action action) {
if (token instanceof ExpressionToken) {
String variable = ((ExpressionToken) token).getExpression();
if (!isLocal(variable)) {
usedVariables.add(variable);
}
}
}
// a variable is local if any enclosing foreach has it as a step
// variable
private boolean isLocal(String variable) {
for (Token token : context.scopes) {
if (token instanceof ForEachToken) {
String foreachVarName = ((ForEachToken) token).getVarName();
if (foreachVarName.equals(variable)) {
return true;
}
}
}
return false;
}
};
final Locale locale = Locale.getDefault();
context =
new TemplateContext(
template,
locale,
sourceName,
scopedMap,
new DefaultModelAdaptor(),
engine,
engine.getErrorHandler(),
processListener);
transformPure(context);
return usedVariables;
}
/**
* Transforms a template into an expanded output using the given model.
*
* @param model the model used to evaluate expressions inside the template
* @return the expanded output
*/
public String transform(Map<String, Object> model) {
return transform(model, engine.getModelAdaptor(), null);
}
private Engine getEngine() {
if (engine == null) {
engine = Engine.createCompilingEngine();
engine.registerNamedRenderer(new HtmlEscapeRenderer());
engine.registerNamedRenderer(new LogRenderer(this));
engine.registerNamedRenderer(new IndexRenderer());
engine.registerNamedRenderer(new RelativePathRenderer(this));
engine.registerNamedRenderer(new NumberRenderer());
engine.registerNamedRenderer(new TimeRenderer());
engine.registerNamedRenderer(new StringRenderer());
engine.registerRenderer(Result.class, new ResultRenderer());
engine.registerRenderer(Node.class, new NodeRenderer(engine, getTemplate("index-node.html")));
engine.registerAnnotationProcessor(new AnnoCommandResults());
}
return engine;
}
/**
* Transforms a template into an expanded output using the given model.
*
* @param model the model used to evaluate expressions inside the template
* @return the expanded output
*/
public String transform(Map<String, Object> model, ProcessListener processListener) {
return transform(model, engine.getModelAdaptor(), processListener);
}