package step.core;
import java.io.*;
import java.util.*;

public class StepValueConverter extends StepAbstractRepositoryVisitor {
    Stack<Object> valstk;

    public StepValueConverter(StepAbstractRepository repo) {
	super (repo);
        valstk = new Stack<Object>();
        valstk.push((Object) new ArrayList<Object>());
    }

    public ArrayList<Object> result() throws EmptyStackException { 
	return (ArrayList<Object>) valstk.pop();
    }

    public void accept(StepGenericRepository e) throws Exception { 
	throw new Exception("unable to accept a repository"); 
    }

    public void accept(StepAggregationValue e) throws Exception {
        ArrayList<Object> res = new ArrayList<Object>();
	((List<Object>)valstk.peek()).add(res);
	valstk.push(res);
	for (int i = 0; i < e.size(); i++) {
	    e.get(i).accept(this);
	}
	valstk.pop();
    }
    public void accept(StepStringValue e) throws Exception {
        ((List<Object>)valstk.peek()).add(e.getVal());
    }
    public void accept(StepBinaryValue e) throws Exception {
	((List<Object>)valstk.peek()).add(e.getVal());
    }
    public void accept(StepEncodedStringValue e) throws Exception {
	((List<Object>)valstk.peek()).add(e.getVal());
    }
    public void accept(StepEnumerationValue e) throws Exception {
	((List<Object>)valstk.peek()).add(e.getVal());
    }
    public void accept(StepExternalRepresentation e) throws Exception {
	throw new Exception("unable to accept an external representation"); 
    }
    public void accept(StepHeaderInstance e) throws Exception {
	((List<Object>)valstk.peek()).add(e);
    }
    public void accept(StepGenericInstanceReference e) throws Exception {
	((List<Object>)valstk.peek()).add(repo.instanceAt(e.getId()));
    }
    public void accept(StepIntegerValue e) throws Exception {
	((List<Object>)valstk.peek()).add(e.getVal());
    }
    public void accept(StepInternalRepresentation e) throws Exception {
	throw new Exception("unable to accept an external representation"); 
    }
    public void accept(StepLogicalValue e) throws Exception {
	((List<Object>)valstk.peek()).add(e.getVal());
    }
    public void accept(StepNoValue e) throws Exception {
	((List<Object>)valstk.peek()).add(null);
    }
    public void accept(StepRealValue e) throws Exception {
	((List<Object>)valstk.peek()).add(e.getVal());
    }
    public void accept(StepRedefinedValue e) throws Exception {
	((List<Object>)valstk.peek()).add(null);
    }
    public void accept(StepSimpleRecord e) throws Exception {
	throw new Exception("unable to accept an external representation"); 
    }
    public void accept(StepTypedValue e) throws Exception {
	e.getVal().accept(this);
    }
}