/**
* Search the current environment frame for the variable If the variable is not found, recursively
* search the calling frames.
*
* @param var the variable to lookup in the environment
* @return the variable
*/
public String getVariable(String var) {
String v = null;
v = (String) variables.get(var);
if (v == null) {
if (this.parent == null) return null;
else return parent.getVariable(var);
} else {
return v;
}
}
