Examples of org.stringtemplate.v4.ST

org.stringtemplate.v4.ST
An instance of the StringTemplate. It consists primarily of a reference to its implementation (shared among all instances) and a hash table of attributes. Because of dynamic scoping, we also need a reference to any enclosing instance. For example, in a deeply nested template for an HTML page body, we could still reference the title attribute defined in the outermost page template. To use templates, you create one (usually via STGroup) and then inject attributes using add(). To render its attacks, use render().

  }


  // should be same for all refs to same token like ctx.ID within single rule function
  // for literals like 'while', we gen _s<ttype>
  public String getImplicitTokenLabel(String tokenName) {
    ST st = getTemplates().getInstanceOf("ImplicitTokenLabel");
    int ttype = getCodeGenerator().g.getTokenType(tokenName);
    if ( tokenName.startsWith("'") ) {
      return "s"+ttype;
    }
    String text = getTokenTypeAsTargetLabel(getCodeGenerator().g, ttype);
    st.add("tokenName", text);
    return st.render();
  }

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    return st.render();
  }


  // x=(A|B)
  public String getImplicitSetLabel(String id) {
    ST st = getTemplates().getInstanceOf("ImplicitSetLabel");
    st.add("id", id);
    return st.render();
  }

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  public String getDOT(ATNState startState, String[] ruleNames, boolean isLexer) {
    if ( startState==null )  return null;


    // The output DOT graph for visualization
    Set<ATNState> markedStates = new HashSet<ATNState>();
    ST dot = stlib.getInstanceOf("atn");
    dot.add("startState", startState.stateNumber);
    dot.add("rankdir", rankdir);


    List<ATNState> work = new LinkedList<ATNState>();


    work.add(startState);
    while ( !work.isEmpty() ) {
      ATNState s = work.get(0);
      if ( markedStates.contains(s) ) { work.remove(0); continue; }
      markedStates.add(s);


      // don't go past end of rule node to the follow states
      if ( s instanceof RuleStopState) continue;


      // special case: if decision point, then line up the alt start states
      // unless it's an end of block
//      if ( s instanceof BlockStartState ) {
//        ST rankST = stlib.getInstanceOf("decision-rank");
//        DecisionState alt = (DecisionState)s;
//        for (int i=0; i<alt.getNumberOfTransitions(); i++) {
//          ATNState target = alt.transition(i).target;
//          if ( target!=null ) {
//            rankST.add("states", target.stateNumber);
//          }
//        }
//        dot.add("decisionRanks", rankST);
//      }


      // make a DOT edge for each transition
      ST edgeST;
      for (int i = 0; i < s.getNumberOfTransitions(); i++) {
        Transition edge = s.transition(i);
        if ( edge instanceof RuleTransition ) {
          RuleTransition rr = ((RuleTransition)edge);
          // don't jump to other rules, but display edge to follow node
          edgeST = stlib.getInstanceOf("edge");


          String label = "<" + ruleNames[rr.ruleIndex];
          if (((RuleStartState)rr.target).isPrecedenceRule) {
            label += "[" + rr.precedence + "]";
          }
          label += ">";


          edgeST.add("label", label);
          edgeST.add("src", "s"+s.stateNumber);
          edgeST.add("target", "s"+rr.followState.stateNumber);
          edgeST.add("arrowhead", arrowhead);
          dot.add("edges", edgeST);
          work.add(rr.followState);
          continue;
        }
        if ( edge instanceof ActionTransition) {
          edgeST = stlib.getInstanceOf("action-edge");
          edgeST.add("label", getEdgeLabel(edge.toString()));
        }
        else if ( edge instanceof AbstractPredicateTransition ) {
          edgeST = stlib.getInstanceOf("edge");
          edgeST.add("label", getEdgeLabel(edge.toString()));
        }
        else if ( edge.isEpsilon() ) {
          edgeST = stlib.getInstanceOf("epsilon-edge");
          edgeST.add("label", getEdgeLabel(edge.toString()));
          boolean loopback = false;
          if (edge.target instanceof PlusBlockStartState) {
            loopback = s.equals(((PlusBlockStartState)edge.target).loopBackState);
          }
          else if (edge.target instanceof StarLoopEntryState) {
            loopback = s.equals(((StarLoopEntryState)edge.target).loopBackState);
          }
          edgeST.add("loopback", loopback);
        }
        else if ( edge instanceof AtomTransition ) {
          edgeST = stlib.getInstanceOf("edge");
          AtomTransition atom = (AtomTransition)edge;
          String label = String.valueOf(atom.label);
          if ( isLexer ) label = "'"+getEdgeLabel(String.valueOf((char)atom.label))+"'";
          else if ( grammar!=null ) label = grammar.getTokenDisplayName(atom.label);
          edgeST.add("label", getEdgeLabel(label));
        }
        else if ( edge instanceof SetTransition ) {
          edgeST = stlib.getInstanceOf("edge");
          SetTransition set = (SetTransition)edge;
          String label = set.label().toString();
          if ( isLexer ) label = set.label().toString(true);
          else if ( grammar!=null ) label = set.label().toString(grammar.getVocabulary());
          if ( edge instanceof NotSetTransition ) label = "~"+label;
          edgeST.add("label", getEdgeLabel(label));
        }
        else if ( edge instanceof RangeTransition ) {
          edgeST = stlib.getInstanceOf("edge");
          RangeTransition range = (RangeTransition)edge;
          String label = range.label().toString();
          if ( isLexer ) label = range.toString();
          else if ( grammar!=null ) label = range.label().toString(grammar.getVocabulary());
          edgeST.add("label", getEdgeLabel(label));
        }
        else {
          edgeST = stlib.getInstanceOf("edge");
          edgeST.add("label", getEdgeLabel(edge.toString()));
        }
        edgeST.add("src", "s"+s.stateNumber);
        edgeST.add("target", "s"+edge.target.stateNumber);
        edgeST.add("arrowhead", arrowhead);
        if (s.getNumberOfTransitions() > 1) {
          edgeST.add("transitionIndex", i);
        } else {
          edgeST.add("transitionIndex", false);
        }
        dot.add("edges", edgeST);
        work.add(edge.target);
      }
    }


    // define nodes we visited (they will appear first in DOT output)
    // this is an example of ST's lazy eval :)
    // define stop state first; seems to be a bug in DOT where doublecircle
    // shape only works if we define them first. weird.
//    ATNState stopState = startState.atn.ruleToStopState.get(startState.rule);
//    if ( stopState!=null ) {
//      ST st = stlib.getInstanceOf("stopstate");
//      st.add("name", "s"+stopState.stateNumber);
//      st.add("label", getStateLabel(stopState));
//      dot.add("states", st);
//    }
    for (ATNState s : markedStates) {
      if ( !(s instanceof RuleStopState) ) continue;
      ST st = stlib.getInstanceOf("stopstate");
      st.add("name", "s"+s.stateNumber);
      st.add("label", getStateLabel(s));
      dot.add("states", st);
    }


    for (ATNState s : markedStates) {
      if ( s instanceof RuleStopState ) continue;
      ST st = stlib.getInstanceOf("state");
      st.add("name", "s"+s.stateNumber);
      st.add("label", getStateLabel(s));
      st.add("transitions", s.getTransitions());
      dot.add("states", st);
    }


    return dot.render();
  }

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    st.add("id", id);
    return st.render();
  }


  public String getImplicitRuleLabel(String ruleName) {
    ST st = getTemplates().getInstanceOf("ImplicitRuleLabel");
    st.add("ruleName", ruleName);
    return st.render();
  }

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    st.add("ruleName", ruleName);
    return st.render();
  }


  public String getElementListName(String name) {
    ST st = getTemplates().getInstanceOf("ElementListName");
    st.add("elemName", getElementName(name));
    return st.render();
  }

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      return this.event == ((Wrapper)o).event;
    }


    @Override
    public String toString() {
      ST st = event.scope.st;
      if ( st.isAnonSubtemplate() ) return "{...}";
      if ( st.debugState!=null && st.debugState.newSTEvent!=null ) {
        String label = st.toString()+" @ "+st.debugState.newSTEvent.getFileName()+":"+
             st.debugState.newSTEvent.getLine();
        return "<html><b>" + StringRenderer.escapeHTML(label) + "</b></html>";
      }
      else {
        return st.toString();
      }
    }

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public class STModelAdaptor implements ModelAdaptor {
  @Override
  public Object getProperty(Interpreter interp, ST self, Object o, Object property, String propertyName)
    throws STNoSuchPropertyException
  {
    ST st = (ST)o;
    return st.getAttribute(propertyName);
  }

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  public void time2Args(int reps) {
    String templates =
      "t(x,y) ::= \"<x><y>\"\n";
    Misc.writeFile(tmpdir, "t.stg", templates);
    STGroup group = new STGroupFile(tmpdir+"/"+"t.stg");
    ST st = group.getInstanceOf("t");
    st.add("x", 1);
    st.add("y", 2);


    for (int i = 0; i < reps; i++) {
      st.render();
    }
  }

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    String templates =
      "t(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z) ::=" +
        " \"<a>,<b>,<c>,<d>,<e>,<f>,<g>,<h>,<i>,<j>,<k>,<l>,<m>,<n>,<o>,<p>,<q>,<r>,<s>,<t>,<u>,<v>,<w>,<x>,<y>,<z>\"\n";
    Misc.writeFile(tmpdir, "t.stg", templates);
    STGroup group = new STGroupFile(tmpdir+"/"+"t.stg");
    ST st = group.getInstanceOf("t");
    st.add("x", 1);
    st.add("y", 2);


    for (int i = 0; i < reps; i++) {
      st.render();
    }
  }

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  public void timeSimplePropsOfArgs(int reps) {
    String templates =
      "t(x) ::= \"<x.id><x.name><x.id><x.name><x.id><x.name>\"\n";
    Misc.writeFile(tmpdir, "t.stg", templates);
    STGroup group = new STGroupFile(tmpdir+"/"+"t.stg");
    ST st = group.getInstanceOf("t");
    st.add("x", new User(32,"parrt"));


    for (int i = 0; i < reps; i++) {
      st.render();
    }
  }

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