Develop Reference

Finding product in category

I need to find products in different categories on eBay. But when I use the tutorial code
ebay.apis.eblbasecomponents.FindProductsRequestType request = new ebay.apis.eblbasecomponents.FindProductsRequestType();
request.setCategoryID("Art");
request.setQueryKeywords("furniture");
I get the following error: QueryKeywords, CategoryID and ProductID cannot be used together.
So how is this done?
EDIT: the tutorial code is here.
EDIT2: the link to the tutorial code died, apparently. I've continued to search and the category cannot be used with the keyword search, but there's a Domain that you could presumably add to the request, but sadly it's not in the API - so I'm not sure if indeed it can be done.
The less-than-great eBay API doc is here.
This is my full request:
Shopping service = new ebay.apis.eblbasecomponents.Shopping();
ShoppingInterface port = service.getShopping();
bp = (BindingProvider) port;
bp.getRequestContext().put(BindingProvider.ENDPOINT_ADDRESS_PROPERTY, endpointURL);
// Add the logging handler
List<Handler> handlerList = bp.getBinding().getHandlerChain();
if (handlerList == null) {
handlerList = new ArrayList<Handler>();
}
LoggingHandler loggingHandler = new LoggingHandler();
handlerList.add(loggingHandler);
bp.getBinding().setHandlerChain(handlerList);
Map<String,Object> requestProperties = bp.getRequestContext();
Map<String, List<String>> httpHeaders = new HashMap<String, List<String>>();
requestProperties.put(BindingProvider.ENDPOINT_ADDRESS_PROPERTY, endpointURL);
httpHeaders.put("X-EBAY-API-CALL-NAME", Collections.singletonList(CALLNAME));
httpHeaders.put("X-EBAY-API-APP-ID", Collections.singletonList(APPID));
httpHeaders.put("X-EBAY-API-VERSION", Collections.singletonList(VERSION));
requestProperties.put(MessageContext.HTTP_REQUEST_HEADERS, httpHeaders);
// initialize WS operation arguments here
FindProductsRequestType request = new FindProductsRequestType();
request.setAvailableItemsOnly(true);
request.setHideDuplicateItems(true);
request.setMaxEntries(2);
request.setPageNumber(1);
request.setQueryKeywords("Postcard");
request.setDomain("");
The last line, which should set the domain like I need to, does not compile. Any idea how to solve this?
EDIT 3: I gave up on the Java API and I'm doing direct REST. The categories on eBay are actually domains now, and the URL looks like this:
String findProducts = "http://open.api.ebay.com/shopping?callname=FindProducts&responseencoding=XML&appid=" + APPID
+ "&siteid=0&version=525&"
+ "&AvailableItemsOnly=true"
+ "&QueryKeywords=" + keywords
+ "&MaxEntries=10"
+ "&DomainName=" + domainName;
This works, but you want to hear a joke? It seems like not all the domains are listed here and so it doesn't really solve this problem. Pretty disappointing work by eBay.

The solution for finding items based on keywords, in a category, is to use findItemsAdvanced. Could have saved me a lot of time if the docs for FindProducts stated this, instead of just saying that you can use either keyword search OR category search.
This is the API URL:
http://open.api.ebay.com/shoppingcallname=findItemsAdvanced&responseencoding=XML&appid=" + APPID
+ "&siteid=0&version=525&"
+ "&AvailableItemsOnly=true"
+ "&QueryKeywords=" + keywords
+ "&categoryId=" + categoryId
+ "&MaxEntries=50
For completion, if you want to get a list of all the top categories you can use this:
http://open.api.ebay.com/Shopping?callname=GetCategoryInfo&appid=" + APPID + "&siteid=0&CategoryID=-1&version=729&IncludeSelector=ChildCategories

How to translate city names in different languages

I have a mobile app (both iOS and Android) and I need to translate cities name in the language of the user. I can do the translation on mobile device or on my server (running php).
As of now I managed to translate country names, here the java code that translate all possible countries in all possible languages:
import java.util.Locale;
public class ListCountry {
public static void main(String[] args) {
ListCountry obj = new ListCountry();
obj.getListOfCountries();
}
public void getListOfCountries() {
String[] locales = Locale.getISOCountries();
for (String countryCode : locales) {
Locale obj = new Locale("", countryCode);
String[] lingue = Locale.getISOLanguages();
for (String languageCode : lingue) {
System.out.println("Country Code = " + obj.getCountry()
+ ", Country Name = " + obj.getDisplayCountry(new Locale(languageCode)) + ", language = " + (new Locale(languageCode)).getDisplayLanguage());
}
}
}
}
How can I do a similar thing but with city names? I know CLDR and ICU but I really can't figure out how to do it (or if it's even possible). If there is a nice object oriented library out there it'll be better than parsing CLDR XMLs or other source.
I prefer to do it locally (on my server or even on mobile app) instead of calling Google API, example:
http://maps.googleapis.com/maps/api/geocode/json?address=turin&language=ES
http://maps.googleapis.com/maps/api/geocode/json?address=turin&language=IT
http://maps.googleapis.com/maps/api/geocode/json?address=turin&language=EN
(question is: I guess google DB of cities name is public, where is it? is it nicely wrapped in some user friendly cross-platform library?)
Thanks for your help

I guess you're looking for a file containing all cities and its translations instead of fetch them once per city?
If so, www.geonames.org has geo-data of different types (countries, adminzones, cities) in multiple languages. Next to their API call you can also download their files directly and parse it by yourself:
At the following URL, you'll find 3 Zip-Files prefixed by "alternativeNames"
http://download.geonames.org/export/dump/
They contain - hopefully - the necessary data.

"merge" two readers into one writer

I need to implement the method
void filter(Reader mails, Reader groups, Writer users) throws IOException
in such a way that it would combine two pieces of data frow readers into one writer.
The file for mails would look like this:
Login;Email
login1;mail1#mail.com
login2;mail2#mail.com
login3;mail3#mail.com
login4;mail4#mail.com
and the file for groups would look like this:
Login;Group;
login1;Group1
login2;Group2
login3;Group3
login4;Group2
And the result of merging should look like this:
Login;Email;Group
login1;mail1#mail.com;Group1
login2;mail2#mail.com;Group2
login3;mail3#mail.com;Group3
login4;mail4#mail.com;Group2
So, what I came up with is: get a string from the first reader, then get another string from the second reader, manipulate them as needed and then write the result with writer.
But is there a way to make it differently or just more elegant?
PS: I'm obliged to use only Reader and Writer classes.
BTW: when I write something to a file with Writer and if I look into the file, I'll see something unreadable. But if I read the same file with Reader and then print it on the console, it looks ok. Is it normal? Or how can I write to the file to make it readable?

How about using a Map and a POJO container.
Pojo is
String email;
String group;
Then you have a hashmap
Map<String,EmailGroup> emailGroup = new HashMap<String,EmailGroup>();
Then your reading code will read the email list then populate the group after.
readEmail(emailGroup);
readGroup(emailGroup);
readEmail(Map<String,EmailGroup> map)
{
EmailGroup tempgroup;
if(map.contains(login))
{
tempGroup = map.get();
}
else
{
EmailGroup tempGroup = new EmailGroup();
}
tempGroup.setEmail(readEmailAddress);
map.put(login,tempGroup);
}
The readGroup does the same but calls setGroup();
This is not a full solution but should provide a suggestion on another possible way to resolve this issue.

If you want to implement a method with this signature, you could do this:
public static void main(String[] args) throws Exception {
String mails = "Login;Email\n"
+ "login1;mail1#mail.com\n"
+ "login2;mail2#mail.com\n"
+ "login3;mail3#mail.com\n"
+ "login4;mail4#mail.com";
String groups = "Login;Group;\n"
+ "login1;Group1\n"
+ "login2;Group2\n"
+ "login3;Group3\n"
+ "login4;Group2";
Reader mailsReader = new StringReader(mails);
Reader groupsReader = new StringReader(groups);
Writer mergedWriter = new StringWriter();
filter(mailsReader, groupsReader, mergedWriter);
System.out.println(mergedWriter.toString());
}
static void filter(Reader mails, Reader groups, Writer users) throws IOException {
BufferedReader mbr = new BufferedReader(mails);
BufferedReader gbr = new BufferedReader(groups);
BufferedWriter ubw = new BufferedWriter(users);
String ml = mbr.readLine();
String gl = gbr.readLine();
while (ml != null && gl != null) {
ubw.write(ml + ";" + gl.split(";")[1] + "\n");
ml = mbr.readLine();
gl = gbr.readLine();
}
ubw.flush();
}
Output:
Login;Email;Group
login1;mail1#mail.com;Group1
login2;mail2#mail.com;Group2
login3;mail3#mail.com;Group3
login4;mail4#mail.com;Group2

Looks like a join on the common key Login.
This should be easy to solve with some maps and some POJOs.
In the following some additional information that should help clarifying my thoughts.
Let's consider following data table. It contains people's first and last names, their email addresses and logins.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ Login + Email + First name + Last name +
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ smith + smith#mail.com + John + Smith +
+ miller + miller#mail.com + John + Miller +
+ jackson + mail#jackson.com + Scott + Jackson +
+ scott + me#scott.com + Scott + Jackson +
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
This information is enough for simple data inquiries. If we want to know what John Smith's email address is, we have to perform a search in the first table. If we want to know Scott Jackson's address, we have a problem, since there are two people with the exact same name in our database.
So a mean to differentiate people is necessary, that is the column Login. It is unique in this table and thus can be used to avoid ambiguities.
Because Login has this attribute, it is called key.
This next table contains the group affiliation per login.
++++++++++++++++++++++++++++++++++++++++
+ Login + Group +
++++++++++++++++++++++++++++++++++++++++
+ smith + user +
+ miller + user +
+ jackson + admin +
+ scott + admin +
++++++++++++++++++++++++++++++++++++++++
Above table has Login as key, too. Using that property allows us to make another type of inquiry. It is possible to ask for group affiliation of persons, in order to do so, we have to retrieve the login of the user in question. Therefore the first table is used. Since Login is a key in the second table, it can be used to get the group affiliation.
This process is called joining, we combined the group affiliation from the second table, with the information on first and second names from the first table and used the login info as key.
A natural join performs this operation on all rows. At this point, I hope it is clear why, I proposed a join. The 2 files correspond to 2 tables (that are invariant to changes in the order of the data). Joining them results in a third table that contains all the information. Printing that table is an answer to OPs question.
To utilize the power of the underlying relational algebra a simple java.util.Map with Login as key can be used.

java.lang.NullPointerException trying to get specific values from hashmap

I've spent several frustrating days on this now and would appreciate some help. I have a Java agent in Lotus Domino 8.5.3 which is activated by a cgi:POST from my Lotusscript validation agent which is checking that customer has filled in the Billing and delivery address form. This is the code that parses the incoming data into a HashMap where field names are mapped to their respective values.
HashMap hmParam = new HashMap(); //Our Hashmap for request_content data
//Grab transaction parameters from form that called agent (CGI: request_content)
if (contentDecoded != null) {
String[] arrParam = contentDecoded.split("&");
for(int i=0; i < arrParam.length; i++) {
int n = arrParam[i].indexOf("=");
String paramName = arrParam[i].substring(0, n);
String paramValue = arrParam[i].substring(n + 1, arrParam[i].length());
hmParam.put(paramName, paramValue); //Old HashMap
if (paramName.equalsIgnoreCase("transaction_id")) {
transactionID = paramValue;
description = "Order " + transactionID + " from Fareham Wine Cellar";
//System.out.println("OrderID = " + transactionID);
}
if (paramName.equalsIgnoreCase("amount")) {
orderTotal = paramValue;
}
if (paramName.equalsIgnoreCase("deliveryCharge")) {
shipping = paramValue;
}
}
}
The block of code above dates back over a year to my original integration of shopping cart to Barclays EPDQ payment gateway. In that agent I recover the specific values and build a form that is then submitted to EPDQ CPI later on in the agent like this;
out.print("<input type=\"hidden\" name=\"shipping\" value=\"");
out.println(hmParam.get("shipping") + "\">");
I want to do exactly the same thing here, except when I try the agent crashes with a null pointer exception. I can successfully iterate through the hashMap with the snippet below, so I know the data is present, but I can't understand why I can't use myHashMap.Get(key) to get each field value in the order I want them for the html form. The original agent in another application is still in use so what is going on? The data too is essentially unchanged String fieldnames mapped to String values.
Iterator it = cgiData.entrySet().iterator();
while (it.hasNext()) {
Map.Entry pairs = (Map.Entry)it.next();
out.println("<br />" + pairs.getKey() + " = " + pairs.getValue());
//System.out.println(pairs.getKey() + " = " + pairs.getValue());
}

I did two things that may have had an impact, in the process of trying to debug what was going on I needed these further imports;
import java.util.Iterator;
import java.util.Map;
Although I'm not iterating over the hashMap, I've left them in in case which gives me the option of dumping the hashMap out to my system audit trail when application is in production. In variations of the snippet below after it started working I was able to get to any of the data I needed, even if the value was Null, and toString() also seemed to be optional again, as it made no difference to the output.
String cgiValue = "";
cgiValue = hmParam.get("ship_to_lastname").toString();
out.println("<br />Lastname: " + cgiValue);
out.println("<br />Company name: " + hmParam.get("bill_to_company"));
out.println("<br />First name: " + hmParam.get("ship_to_firstname"));
The second thing I did, while trying to get code to work was I enabled the option "Compile Java code with debugging information" for the agent, this may have done something to the way the project was built within the Domino Developer client.
I think I have to put this down to some sort of internal error created when Domino Designer compiled the code. I had a major crash last night while working on this which necessitated a cold boot of my laptop. You also may find that when using Domino Designer 8.5.x that strange things can happen if you don't completely close down all the tasks from time to time with KillNotes

ROME API to parse RSS/Atom

I'm trying to parse RSS/Atom feeds with the ROME library. I am new to Java, so I am not in tune with many of its intricacies.
Does ROME automatically use its modules to handle different feeds as it comes across them, or do I have to ask it to use them? If so, any direction on this.
How do I get to the correct 'source'? I was trying to use item.getSource(), but it is giving me fits. I guess I am using the wrong interface. Some direction would be much appreciated.
Here is the meat of what I have for collection my data.
I noted two areas where I am having problems, both revolving around getting Source Information of the feed. And by source, I want CNN, or FoxNews, or whomever, not the Author.
Judging from my reading, .getSource() is the correct method.
List<String> feedList = theFeeds.getFeeds();
List<FeedData> feedOutput = new ArrayList<FeedData>();
for (String sites : feedList ) {
URL feedUrl = new URL(sites);
SyndFeedInput input = new SyndFeedInput();
SyndFeed feed = input.build(new XmlReader(feedUrl));
List<SyndEntry> entries = feed.getEntries();
for (SyndEntry item : entries){
String title = item.getTitle();
String link = item.getUri();
Date date = item.getPublishedDate();
Problem here --> ** SyndEntry source = item.getSource();
String description;
if (item.getDescription()== null){
description = "";
} else {
description = item.getDescription().getValue();
}
String cleanDescription = description.replaceAll("\\<.*?>","").replaceAll("\\s+", " ");
FeedData feedData = new FeedData();
feedData.setTitle(title);
feedData.setLink(link);
And Here --> ** feedData.setSource(link);
feedData.setDate(date);
feedData.setDescription(cleanDescription);
String preview =createPreview(cleanDescription);
feedData.setPreview(preview);
feedOutput.add(feedData);
// lets print out my pieces.
System.out.println("Title: " + title);
System.out.println("Date: " + date);
System.out.println("Text: " + cleanDescription);
System.out.println("Preview: " + preview);
System.out.println("*****");
}
}

getSource() is definitely wrong - it returns back SyndFeed to which entry in question belongs. Perhaps what you want is getContributors()?
As far as modules go, they should be selected automatically. You can even write your own and plug it in as described here

What about trying regex the source from the URL without using the API?
That was my first thought, anyway I checked against the RSS standardized format itself to get an idea if this option is actually available at this level, and then try to trace its implementation upwards...
In RSS 2.0, I have found the source element, however it appears that it doesn't exist in previous versions of the spec- not good news for us!
[ is an optional sub-element of 1
Its value is the name of the RSS channel that the item came from, derived from its . It has one required attribute, url, which links to the XMLization of the source.