DACPServer/src/util/command/databases/Browse.java

   1 package util.command.databases;
   2
   3 import interfaces.Constants;
   4 import interfaces.DJInterface;
   5 import interfaces.Track;
   6 import interfaces.collection.Collection;
   7
   8 import java.util.ArrayList;
   9 import java.util.Collections;
  10 import java.util.HashSet;
  11 import java.util.List;
  12 import java.util.Map;
  13 import java.util.Set;
  14
  15 import util.command.Command;
  16 import util.queryparser.ApplyFilter;
  17 import util.queryparser.Filter;
  18 import util.queryparser.QueryParser;
  19 import api.Response;
  20
  21 public class Browse implements Command {
  22
  23         private Map<String,String> args;
  24         private int container;
  25         private Constants code;
  26         private Constants field;
  27
  28         public Browse(int container, Constants code, Constants field) {
  29                 this.container = container;
  30                 this.code = code;
  31                 this.field = field;
  32         }
  33
  34         public void init(Map<String, String> args) {
  35                 this.args = args;
  36
  37                 System.out.println(args);
  38         }
  39
  40         public Response run(DJInterface dj) {
  41
  42                 Iterable<? extends Track> songs = null;
  43
  44                 for (Collection<? extends Track> p: dj.library().collections()) {
  45                         if (p.id() == container) {
  46                                 songs = p.source().tracks();
  47                                 break;
  48                         }
  49                 }
  50
  51                 if (songs == null) {
  52                         songs = dj.library().tracks();
  53                 }
  54
  55                 System.out.println("collection has " + dj.library().size() + " elements");
  56
  57                 if (args != null && args.containsKey("filter")) {
  58                         Filter f = QueryParser.parse(args.get("filter"));
  59                         System.out.println(f);
  60                         songs = ApplyFilter.filter(f, songs);
  61                 }
  62
  63                 Set<String> results = new HashSet<String>();
  64
  65                 for (Track t: songs) {
  66                         String name = (String)t.get(field);
  67                         if (name != null) results.add(name);
  68                 }
  69
  70                 System.out.println("partial result has " + results.size() + " unique");
  71
  72                 List<String> list = new ArrayList<String>();
  73                 list.addAll(results);
  74
  75                 Collections.sort(list);
  76
  77                 System.out.println("returning " + list.size() + " elements from " + dj.library().size());
  78
  79                 return new util.response.databases.Browse(code, list);
  80         }
  81
  82 }