public static String getWolframResult(String queryToExecute) {
// Use "pi" as the default query, or caller can supply it as the lone command-line argument.
String input = "pi";
String result = "";
// if (args.length > 0)
// input = args[0];
logger.info("1");
// The WAEngine is a factory for creating WAQuery objects,
// and it also used to perform those queries. You can set properties of
// the WAEngine (such as the desired API output format types) that will
// be inherited by all WAQuery objects created from it. Most applications
// will only need to crete one WAEngine object, which is used throughout
// the life of the application.
WAEngine engine = new WAEngine();
// These properties will be set in all the WAQuery objects created from this WAEngine.
engine.setAppID(appid);
engine.addFormat("plaintext");
logger.info("2");
// Create the query.
WAQuery query = engine.createQuery();
logger.info("3");
// Set properties of the query.
query.setInput(queryToExecute);
logger.info("4");
try {
// For educational purposes, print out the URL we are about to send:
logger.info("Query URL:");
logger.info(engine.toURL(query));
logger.info("");
// This sends the URL to the Wolfram|Alpha server, gets the XML result
// and parses it into an object hierarchy held by the WAQueryResult object.
WAQueryResult queryResult = engine.performQuery(query);
if (queryResult.isError()) {
logger.info("Query error");
logger.info(" error code: " + queryResult.getErrorCode());
logger.info(" error message: " + queryResult.getErrorMessage());
} else if (!queryResult.isSuccess()) {
logger.info("Query was not understood; no results available.");
} else {
// Got a result.
logger.info("Successful query. Pods follow:\n");
for (WAPod pod : queryResult.getPods()) {
logger.info(pod.getTitle());
// logger.info(WolframAlphaConstants.POD_DECIMAL_APROXIMATION);
if (!pod.isError()
&& (pod.getTitle().equals(WolframAlphaConstants.POD_DECIMAL_APROXIMATION)
|| pod.getTitle().equals(WolframAlphaConstants.POD_RESULT)
|| pod.getTitle().equals(WolframAlphaConstants.POD_REAL_SOLUTION))) {
logger.info(pod.getTitle());
logger.info("------------");
for (WASubpod subpod : pod.getSubpods()) {
for (Object element : subpod.getContents()) {
if (element instanceof WAPlainText) {
logger.info(((WAPlainText) element).getText());
logger.info("");
result = (((WAPlainText) element).getText());
}
}
}
logger.info("");
}
}
// We ignored many other types of Wolfram|Alpha output, such as warnings, assumptions, etc.
// These can be obtained by methods of WAQueryResult or objects deeper in the hierarchy.
}
} catch (WAException e) {
logger.info(e.getMessage());
}
return result;
}
