/*
 * @(#)VariablesVector.java	0.0.0 99/08/03
 *
 * Copyright (c) 1999 by Willie Wheeler.  All rights reserved.
 */
package stats;

import java.util.*;

/**
 * @version	0.0.0 08/03/99
 * @author	Willie Wheeler
 */
public class VariablesVector extends Vector {

    public VariablesVector(Collection c) { super(c); }

    public String getVariableNamesAsString(int[] variableIndices) {
	String name = ((Variable)get(variableIndices[0])).getName();
	StringBuffer buffer = new StringBuffer(name);
	for (int j = 1; j < variableIndices.length; j++) {
	    name = ((Variable)get(variableIndices[j])).getName();
	    buffer.append(" x " + name);
	}
	return buffer.toString();
    }

    public String getStateAsString(int[] state,
				   boolean includeVariableNames,
				   String valueDelimiter) {

	// Return empty string if the state is null.
	if (state == null) { return ""; }

	// Look for variables with specified values, and put the values in a
	// vector.
	Vector values = new Vector();
	for (int j = 0; j < state.length; j++) {
	    if (state[j] != -1) {
		TextVariable variable = (TextVariable)get(j);
		StringBuffer buffer = new StringBuffer();
		if (includeVariableNames) {
		    buffer.append(variable.getName() + "=");
		}
		buffer.append(variable.getValue(state[j]));
		values.add(buffer.toString());
	    }
	}

	// Return empty string if no variables have specified values.
	if (values.isEmpty()) { return ""; }

	// At least one variable has a specified value, so put all the values
	// in a string and return it.
	StringBuffer buffer = new StringBuffer((String)values.get(0));
	for (int j = 1; j < values.size(); j++) {
	    buffer.append(valueDelimiter + (String)values.get(j));
	}
	return buffer.toString();
    }

    public String[] getStatesAsStrings(int[][] states,
				       boolean includeVariableNames,
				       String valueDelimiter) {

	String[] stateNames = new String[states.length];
	for (int i = 0; i < states.length; i++) {
	    stateNames[i] = getStateAsString(states[i],
					     includeVariableNames,
					     valueDelimiter);
	}
	return stateNames;
    }
}