private SearchEngineResponse<MediaItem> search(SolrQuery query) {
SearchEngineResponse<MediaItem> response = new SearchEngineResponse<MediaItem>();
QueryResponse rsp;
try {
rsp = server.query(query);
} catch (SolrServerException e) {
e.printStackTrace();
Logger.getRootLogger().info(e.getMessage());
return null;
}
List<SolrMediaItem> solrItems = rsp.getBeans(SolrMediaItem.class);
List<MediaItem> mediaItems = new ArrayList<MediaItem>();
for (SolrMediaItem solrMediaItem : solrItems) {
try {
MediaItem mediaItem = solrMediaItem.toMediaItem();
String id = mediaItem.getId();
mediaItem.setId(id);
mediaItems.add(mediaItem);
} catch (MalformedURLException ex) {
Logger.getRootLogger().error(ex.getMessage());
}
}
response.setResults(mediaItems);
return response;
}
public MediaItem getSolrMediaItem(String id) {
SolrQuery solrQuery = new SolrQuery("id:" + id);
SearchEngineResponse<MediaItem> mi = search(solrQuery);
List<MediaItem> results = mi.getResults();
if (results == null || results.size() == 0) {
return null;
}
MediaItem mediaItem = results.get(0);
mediaItem.setId(id);
return mediaItem;
}
public List<MediaItem> findAllMediaItemsByKeywords(List<String> keywords, String type, int size) {
List<MediaItem> mediaItems = new ArrayList<MediaItem>(size);
boolean first = true;
for (String key : keywords) {
System.out.println("key : " + key);
}
String query = "(";
if (keywords.size() == 1) {
if (keywords.get(0).split(" ").length > 1) {
query += "feedKeywordsString:\"" + keywords.get(0) + "\"";
} else {
query += "feedKeywords:" + keywords.get(0);
}
} else {
List<String> wordEntities = new ArrayList<String>();
List<String> simpleWords = new ArrayList<String>();
query += "feedKeywordsString:(";
// split keywords into two categories
for (int i = 0; i < keywords.size(); i++) {
if (keywords.get(i).split(" ").length > 1) {
wordEntities.add(keywords.get(i));
} else {
simpleWords.add(keywords.get(i));
}
}
// feedKeywordsString matches words that are entities (names,organizations,locations)
for (int i = 0; i < wordEntities.size(); i++) {
if (!first) {
query += " OR ";
}
query += "\"" + wordEntities.get(i) + "\"";
int j = i + 1;
// else for all other keywords create combinations ((key_1ANDkey_2) OR (key_1ANDkey_3) OR
// ..)
while (j < wordEntities.size()) {
query += " OR ";
String oneQuery = "(\"" + wordEntities.get(i) + "\" AND \"" + wordEntities.get(j) + "\")";
query += oneQuery;
int k = j + 1;
while (k < wordEntities.size()) {
query += " OR ";
String secQuery =
"(\""
+ wordEntities.get(i)
+ "\" AND \""
+ wordEntities.get(j)
+ "\" AND \""
+ wordEntities.get(k)
+ "\")";
query += secQuery;
k++;
}
j++;
}
first = false;
}
if (first && simpleWords.size() > 0) {
query = "(feedKeywords:(";
} else if (simpleWords.size() > 0) {
first = true;
query += ") OR feedKeywords:(";
}
for (int i = 0; i < simpleWords.size(); i++) {
int j = i + 1;
// for all other keywords create combinations ((key_1ANDkey_2) OR (key_1ANDkey_3) OR ..)
while (j < simpleWords.size()) {
if (!first) {
query += " OR ";
}
String oneQuery = "(" + simpleWords.get(i) + " AND " + simpleWords.get(j) + ")";
query += oneQuery;
int k = j + 1;
while (k < simpleWords.size()) {
query += " OR ";
String secQuery =
"("
+ simpleWords.get(i)
+ " AND "
+ simpleWords.get(j)
+ " AND "
+ simpleWords.get(k)
+ ")";
query += secQuery;
k++;
}
j++;
first = false;
}
j = 0;
while (j < wordEntities.size()) {
if (!first) {
query += " OR ";
}
String oneQuery = "(" + simpleWords.get(i) + " AND " + wordEntities.get(j) + ")";
query += oneQuery;
int k = j + 1;
while (k < wordEntities.size()) {
query += " OR ";
String secQuery =
"("
+ simpleWords.get(i)
+ " AND "
+ wordEntities.get(j)
+ " AND "
+ wordEntities.get(k)
+ ")";
query += secQuery;
k++;
}
k = i + 1;
while (k < simpleWords.size()) {
query += " OR ";
String secQuery =
"("
+ simpleWords.get(i)
+ " AND "
+ wordEntities.get(j)
+ " AND "
+ simpleWords.get(k)
+ ")";
query += secQuery;
k++;
}
j++;
first = false;
}
}
query += ")";
}
/*
//OLD VERSION
String query = "feedKeywords:(";
//If only one keyword query with that
if(keywords.size() == 1){
query += keywords.get(0);
}
else{
for(int i=0;i<keywords.size();i++){
//If keyword is a name (two words) make it a stand-alone term for query
if(keywords.get(i).split(" ").length >1){
if (!first) {
query += " OR ";
}
query += "("+keywords.get(i)+")";
first = false;
}
int j=i+1;
//else for all other keywords create combinations ((key_1ANDkey_2) OR (key_1ANDkey_3) OR ..)
while(j<keywords.size()){
if (!first) {
query += " OR ";
}
String oneQuery = "("+keywords.get(i)+" AND "+keywords.get(j)+")";
query += oneQuery;
first = false;
j++;
}
}
}*/
// Set to the query the type of media item we want to be retrieved from solr (image - video)
query += ") AND type : " + type;
// escape "/" character in Solr Query
query = query.replace("/", "\\/");
SolrQuery solrQuery = new SolrQuery(query);
Logger.getRootLogger().info("query: " + query);
solrQuery.setRows(size);
SearchEngineResponse<MediaItem> response = search(solrQuery);
if (response != null) {
List<MediaItem> results = response.getResults();
Set<String> urls = new HashSet<String>();
for (MediaItem mi : results) {
if (!urls.contains(mi.getUrl())
&& !mi.getThumbnail().contains("sddefault")
&& !mi.getUrl().contains("photo_unavailable")) {
mediaItems.add(mi);
urls.add(mi.getUrl());
}
}
}
return mediaItems;
}