Examples of org.odbms.Query

org.odbms.Query
handle to a query graph and reference to a specific node.

The query graph consists of multiple nodes, each representing a class or a member of a class. The structure can be linked in any way that the class model used allows. A Query object references a single node of this graph.

The graph can be traversed with the functions descendant() and parent() which return references to other nodes of the graph. These two functions will automatically extend the graph, if necessary.

execute() evaluates the entire graph against the objects stored in the data container. execute() can be called from any node of the graph and will create an ObjectSet filled with objects of the object type that the node, it was called from, represents. Objects for all descendant nodes of the caller Query object will be instantiated. Objects of parent nodes will not be visible in the ObjectSet if they are not referenced from the caller Query object.


  }


  private void query()
  {
    Query q1 = db.query(LogEntry.class);
    // q1.constrain("date", OP.GREATER, currentTime);
    q1.constrain("date", OP.RANGE, e1.getDate().getTime(), e2.getDate().getTime());


    ObjectSet<LogEntry> entries = q1.execute();


    int cnt = 0;
    for (LogEntry entry : entries) {
      cnt++;
      System.out.println(entry + " exists=" + entry.getFile().exists());
    }


    q1.printConstraintInfo();
    db.printCacheStatistics();


  }

View Full Code Here


  /**
   * 
   */
  POQQuery1OR() {
    Query q1 = gtm.query(Disc.class);
    q1.constrain("DTITLE", OP.STARTS_WITH, FUNCTION.TO_UPPER, "TINA");
    q1.constrain("DTITLE", OP.CONTAINS, FUNCTION.TO_UPPER, "TURNER");


    Query q2 = gtm.query(Disc.class);
    q2.constrain("DTITLE", OP.STARTS_WITH, FUNCTION.TO_UPPER, "IKE");
    q2.constrain("DTITLE", OP.CONTAINS, FUNCTION.TO_UPPER, "TURNER");


    ObjectSet<Disc> discs = q1.OR(q2);


    Util.printObjectSet(discs);


    q1.printConstraintInfo();
    q2.printConstraintInfo();
    gtm.printCacheStatistics();
  }

View Full Code Here


  /**
   * 
   */
  public POQQuery1AND() {
    Query q1 = gtm.query(Disc.class);
    q1.constrain("DTITLE", OP.STARTS_WITH, FUNCTION.TO_UPPER, "ERIC CLAPTON");
    q1.constrain("DYEAR", OP.RANGE, 1990, 1999);


    Query q2 = gtm.query(Disc.class);
    q2.constrain("DGENRE", OP.EQUALS, FUNCTION.TO_UPPER, "Blues");
    q2.constrain("DTITLE", OP.CONTAINS, FUNCTION.TO_UPPER, "Live");


    ObjectSet<Disc> discs = q1.AND(q2);


    Util.printObjectSet(discs);


    q1.printConstraintInfo();
    q2.printConstraintInfo();
    gtm.printCacheStatistics();
  }

View Full Code Here

   */
  public POQQuery1(String searchFor) {
    if (searchFor == null)
      throw new IllegalArgumentException("Parameter 'searchFor' must not be null");


    Query q1 = gtm.query(Disc.class);
    q1.constrain("DGENRE", OP.EQUALS, FUNCTION.TO_UPPER, "Jazz");
    q1.constrain("DTITLE", OP.CONTAINS, FUNCTION.TO_UPPER, searchFor);
    q1.constrain("DYEAR", OP.GREATER, 1999);
    q1.sortBy("DYEAR");
    ObjectSet<Disc> discs = q1.execute();


    Util.printObjectSet(discs);
    q1.printConstraintInfo();
    gtm.printCacheStatistics();


    System.out.println("-----------------------------------------");


    // 2. query with Iterator
    Query q2 = gtm.query(Disc.class);
    q2.constrain("DTITLE", OP.STARTS_WITH, FUNCTION.TO_UPPER, searchFor);
    q2.constrain("DTITLE", OP.CONTAINS, FUNCTION.TO_UPPER, "live");
    q2.constrain("DYEAR", OP.RANGE, 2000, 2002);
    q2.constrain("DGENRE", OP.EQUALS, FUNCTION.TO_UPPER, "BLUES");
    discs = q2.execute();


    Iterator<Disc> iter = discs.iterator();
    while (iter.hasNext()) {
      Disc disc = iter.next();
      System.out.println(disc);
    }


    q2.printConstraintInfo();
    gtm.printCacheStatistics();
  }

View Full Code Here

   * 
   * @param searchFor
   */
  public void testSorted()
  {
    Query q1 = db.query(Disc.class);
    q1.constrain("DTITLE", OP.CONTAINS, FUNCTION.TO_UPPER, "the");
    q1.constrain("DYEAR", OP.RANGE, 2000, 2009);


    q1.sortBy("DTITLE");
    q1.sortBy("DGENRE");
    q1.sortByDescending("DYEAR");


    ObjectSet<Disc> discs = q1.execute();
    int discsSize = discs.size();


    int age = Integer.MIN_VALUE;
    for (Disc disc : discs) {
      if (age < disc.getAge()) {

View Full Code Here

    super.setUp();
  }


  public void testBandsWithArtist()
  {
    Query query = db.query(new Predicate<Band>() {
      public boolean match(Band band)
      {
        return band.getAritsts().size() > 2;
      }
    });
    ObjectSet<Band> bands = query.execute();
  }

View Full Code Here

  /**
   * 
   */
  public void artists()
  {
    Query query = db.query(new Predicate<Artist>() {
      public boolean match(Artist artist)
      {
        return artist.getName().equals("John Lennon");
      }
    });
    ObjectSet<Band> artists = query.execute();
  }

View Full Code Here

  /**
   * 
   */
  public void testAlbumWithClock()
  {
    Query query = db.query(new Predicate<Album>() {
      public boolean match(Album album)
      {
        return album.getName().startsWith("Clock");
      }
    });
    ObjectSet<Album> albums = query.execute();


    for (Album album : albums) {
    }
  }

View Full Code Here

  /**
   * 
   */
  public void testTrackNameContainsRoad()
  {
    Query query = db.query(new Predicate<Track>() {
      public boolean match(Track track)
      {
        return track.getTitle().contains("road");
      }
    });
    ObjectSet<Track> tracks = query.execute();
  }

View Full Code Here

     */
    public void testWithFakedQuery()
    {
        try
        {
            Query q = broker.query();
            // we are faking a soda query here:
            ((QueryImpl) q).setOjbQuery(ojbQuery());
            int limit = 13;
            q.limitSize(limit);
            ObjectSet oSet = q.execute();
            logger.info("Size of ObjectSet: " + oSet.size());
            assertEquals(limit,oSet.size());
            int count = 0;
            while (oSet.hasNext())
            {

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