package nzdis.lang.fipaacl;

/**/
import java.util.Hashtable;
import nzdis.lang.fipaacl.analysis.DepthFirstAdapter;
import nzdis.lang.fipaacl.node.*;

/**
 * Creates the hash of identifiers with parameters as
 * strings. communicative act is under 'performative' key. 
 *
 *@author Mariusz Nowostawski
 *@version @version@ $Revision: 1.1 $
 */
public class MessageProcessorWalker extends DepthFirstAdapter {

  Hashtable hash = new Hashtable();
  String performative = "performative";

  StringBuffer param = null;
  String param_key = null;

  boolean spaceNeeded = false;
  int indentNeeded = 0;

  
  public Hashtable getMessageHash(){
    return hash;
  }

  public void defaultIn(Node node) {
  }
  public void defaultOut(Node node) {
  }  
  public void defaultCase(Node node) {
  }

  public void inAMessage(AMessage node){
    hash.put(performative, node.getIdentifier().getText().trim());
  }
  
  public void inAParameter(AParameter node){
    param = new StringBuffer();
    param_key = node.getIdentifier().getText().trim();
  }

  public void outAParameter(AParameter node){
    hash.put(param_key, param.toString());
  }

  public void inAComplexContent(AComplexContent node){
    param.append("(");
    spaceNeeded = false;
  }

  public void outAComplexContent(AComplexContent node){
    param.append(")");
    spaceNeeded = false;
  }

  public void inAIdentifierContent(AIdentifierContent node){
    if(spaceNeeded) {
      param.append(" ");
    }
    param.append(node.getIdentifier().getText());
    spaceNeeded = true;
  }

  public void inAExprContent(AExprContent node){
    if(spaceNeeded) {
      param.append(" ");
    }
    param.append(node.getLiteral().getText());
    spaceNeeded = true;
  }

  public void inAPropertyContent(APropertyContent node){
    if(spaceNeeded) {
      param.append(" ");
    }
    param.append(":").append(node.getIdentifier().getText());
    spaceNeeded = true;
  }

  public void inAStringContent(AStringContent node){
    if(spaceNeeded) {
      param.append(" ");
    }
    param.append(node.getString().getText());
    spaceNeeded = true;
  }

}