/**
* Evaluates a PostfixMathCommandI with given arguments. Not used in normal use.
*
* @param pfmc the command to evaluate.
* @param children the parameters to the function.
* @return the value of the function
* @throws ParseException
*/
public Object eval(PostfixMathCommandI pfmc, Node children[]) throws ParseException {
if (pfmc instanceof SpecialEvaluationI) {
ASTFunNode node = new ASTFunNode(ParserTreeConstants.JJTFUNNODE);
node.setFunction("TmpFun", pfmc);
node.jjtOpen();
for (int i = 0; i < children.length; ++i) {
node.jjtAddChild(children[i], i);
}
node.jjtClose();
return ((SpecialEvaluationI) pfmc).evaluate(node, null, this, new Stack(), this.symTab);
}
if (pfmc instanceof CallbackEvaluationI) {
ASTFunNode node = new ASTFunNode(ParserTreeConstants.JJTFUNNODE);
node.setFunction("TmpFun", pfmc);
node.jjtOpen();
for (int i = 0; i < children.length; ++i) {
node.jjtAddChild(children[i], i);
}
node.jjtClose();
Object val = ((CallbackEvaluationI) pfmc).evaluate(node, this);
return val;
}
Stack lstack = new Stack();
for (int i = 0; i < children.length; ++i) {
if (!(children[i] instanceof ASTConstant))
throw new ParseException("buildConstantNode: arguments must all be constant nodes");
lstack.push(((ASTConstant) children[i]).getValue());
}
pfmc.setCurNumberOfParameters(children.length);
pfmc.run(lstack);
return lstack.pop();
}
