/** INTERNAL Validate node and calculate its type. */
public void validate(ParseTreeContext context) {
TypeHelper typeHelper = context.getTypeHelper();
if (findIn != null) {
findIn.validate(context);
findIn.validateParameter(context, typeHelper.getStringType());
}
if (find != null) {
find.validate(context);
find.validateParameter(context, typeHelper.getStringType());
}
if (startPosition != null) {
startPosition.validate(context);
startPosition.validateParameter(context, typeHelper.getIntType());
}
setType(typeHelper.getIntType());
}
