package de.dhbwstuttgart.syntaxtree.statement;

import java.util.Iterator;

import org.apache.commons.bcel6.generic.InstructionList;

import de.dhbwstuttgart.typeinference.Menge;
import de.dhbwstuttgart.bytecode.ClassGenerator;
import de.dhbwstuttgart.myexception.JVMCodeException;
import de.dhbwstuttgart.syntaxtree.FormalParameter;
import de.dhbwstuttgart.syntaxtree.SyntaxTreeNode;
import de.dhbwstuttgart.typeinference.JavaCodeResult;
import de.dhbwstuttgart.typeinference.ResultSet;

public class ArgumentList extends SyntaxTreeNode
{
    public Menge<Expr> expr = new Menge<Expr>();
    
    
    public Object get_firstElement()
    {
        return expr.firstElement();
    }

    /**
     * @author Andreas Stadelmeier, a10023
     * @return Anzahl der Argumente in der ArgumentList
     */
	public int size() {
		return expr.size();
	}
    
	/**
	 * @author Andreas Stadelmeier, a10023
	 * @param n
	 * @return Das Element (Expr) in der Argumentliste an der Stelle n
	 */
    public Expr argumentAt(int n){
    	return expr.elementAt(n);
    }
    public String toString(){
		if(expr == null)return "[]"; 
		String ret = " [ ";
		for(Expr expr : this.expr){
			ret += expr.toString()+", ";
		}
		return ret + "]";
	}


	public JavaCodeResult printJavaCode(ResultSet resultSet) {
		JavaCodeResult ret = new JavaCodeResult();
		Iterator<Expr> it = this.expr.iterator();
		while(it.hasNext()){
			Expr expr = it.next();
			ret.attach(expr.printJavaCode(resultSet));
			if(it.hasNext())ret.attach(", ");
		}
		//if(this.expr.size()>0)ret = ret.substring(0, ret.length()-2);
		return ret;
	}



	@Override
	public int getOffset() {
		return 0;
	}



	@Override
	public int getVariableLength() {
		return 0;
	}



	@Override
	public Menge<? extends SyntaxTreeNode> getChildren() {
		return expr;
	}
	
	public InstructionList generateBytecode(ClassGenerator cg){
		InstructionList ret = new InstructionList();
		for(Expr e : expr){
			ret.append(e.genByteCode(cg));
		}
		return ret;
	}
	
	public org.apache.commons.bcel6.generic.Type[] getBytecodeTypeList(ClassGenerator cg){
		org.apache.commons.bcel6.generic.Type[] ret = new org.apache.commons.bcel6.generic.Type[expr.size()];
		int i = 0;
		for(Expr e : expr){
			ret[i] = e.getType().getBytecodeType(cg);
			i++;
		}
		return ret;
	}
}