/* Returns List of Wikipedia page-ids of pages the string 'anchor' points to in Wikipedia */
public List<Long> getPages(String anchor) {
db.requestStart();
List<Long> PageCollection = new ArrayList<Long>();
BasicDBObject query = new BasicDBObject();
query.put("anchor", anchor);
BasicDBObject fields = new BasicDBObject("pages", true).append("_id", false);
DBObject obj =
table.findOne(query, fields); // System.out.println("num of results = "+curs.count());
if (obj != null) {
JSONParser jp = new JSONParser();
JSONArray jarr = null;
try {
jarr = (JSONArray) jp.parse(obj.get("pages").toString());
} catch (ParseException e) {
jarr = new JSONArray();
}
// System.out.println("Link Freq = "+o.get("anchPageFreq").toString());
for (int i = 0; i < jarr.size(); i++) {
JSONObject objects = (JSONObject) jarr.get(i);
PageCollection.add((long) (objects.get("page_id")));
}
}
db.requestDone();
return PageCollection;
} // End getPages()
/* Returns map of Wikipedia page-ids to number of inlinks to those pages. Page ids are pages the string 'anchor' points to in Wikipedia */
public Map<Long, Integer> getPagesMap(String anchor) {
db.requestStart();
Map<Long, Integer> PageCollection = new HashMap<Long, Integer>();
BasicDBObject query = new BasicDBObject();
query.put("anchor", anchor);
BasicDBObject fields =
new BasicDBObject("page_id", true)
.append("pages", true)
.append("page_freq", true)
.append("anchor_freq", true)
.append("_id", false);
DBObject ans =
table.findOne(query, fields); // System.out.println("num of results = "+curs.count());
db.requestDone();
if (ans != null) {
JSONParser jp = new JSONParser();
JSONArray jo = null;
try { // System.out.println(ans.get("pages"));
jo = (JSONArray) jp.parse(ans.get("pages").toString());
} catch (ParseException e) {
e.printStackTrace();
} // System.out.println("Link Freq = "+o.get("anchPageFreq").toString());
for (int i = 0; i < jo.size(); i++) {
JSONObject object = (JSONObject) jo.get(i);
Long pId = (long) (object.get("page_id"));
Long pValue0 = (long) object.get("page_freq");
int pValue = pValue0.intValue();
if (PageCollection.containsKey(pId)) {
pValue = PageCollection.get(pId) + pValue;
}
PageCollection.put(pId, pValue);
}
}
return PageCollection;
} // End getPagesMap()
/**
* Perform actual closing of the Mongo DB object, catching and logging any cleanup exceptions
* thrown.
*
* @param db the DB to close (may be <code>null</code>)
*/
public static void closeDB(DB db) {
if (db != null) {
LOGGER.debug("Closing Mongo DB object");
try {
db.requestDone();
} catch (Throwable ex) {
LOGGER.debug("Unexpected exception on closing Mongo DB object", ex);
}
}
}
/* Returns number of times 'anchor' occurs in Wikipedia, but is NOT a hyperlink */
public int getTotalFreq(String anchor) {
db.requestStart();
int totalFreq = 0;
BasicDBObject query = new BasicDBObject(); // create an empty query
query.put("anchor", anchor);
BasicDBObject fields = new BasicDBObject("total_freq", true).append("_id", false);
DBObject obj =
table.findOne(query, fields); // System.out.println("num of results = "+curs.count());
if (obj != null) { // System.out.println("Freq = "+o.get("totalFreq").toString());
totalFreq = (int) obj.get("total_freq");
}
db.requestDone();
return totalFreq;
} // End getTotalFreq()
/* Returns two member integer array.
* member 0 = total number of inlinks for the string anchor.
* member 1 = number of inlinks to given PageId from the String anchor.*/
public int[] getPageCountInPages(String anchor, long PageId) {
db.requestStart();
int[] PageCountResults = new int[2];
;
int pageCount = 0;
int totalCount = 0;
BasicDBObject query = new BasicDBObject();
query.put("anchor", anchor);
BasicDBObject fields =
new BasicDBObject("pages", true)
.append("anchor_freq", true)
.append("total_freq", true)
.append("_id", false);
DBObject obj =
table.findOne(query, fields); // System.out.println("Pages Total = "+curs.count());
db.requestDone();
if (obj != null) {
// System.out.println("Obj = "+o.get("pageId").toString());
JSONParser jp = new JSONParser();
JSONArray jarr = null;
try {
jarr = (JSONArray) jp.parse(obj.get("pages").toString());
} catch (ParseException e) {
jarr = new JSONArray();
}
// System.out.println("Link Freq = "+o.get("anchPageFreq").toString());
for (int i = 0; i < jarr.size(); i++) {
JSONObject jo = (JSONObject) jarr.get(i);
if (PageId == (long) jo.get("page_id")) {
Long pageCount0 = (long) jo.get("page_freq"); // ++pageCount;
pageCount += pageCount0.intValue();
}
}
totalCount += (int) obj.get("anchor_freq");
}
PageCountResults[1] = pageCount; // System.out.println("Pages matching = "+pageCount);
PageCountResults[0] = totalCount;
return PageCountResults;
} // End getPageCountInPages()
