Examples of eu.stratosphere.test.recordJobs.util.Tuple.project()

Package eu.stratosphere.test.recordJobs.util

Class eu.stratosphere.test.recordJobs.util.Tuple

Examples of eu.stratosphere.test.recordJobs.util.Tuple.project()

eu.stratosphere.test.recordJobs.util.Tuple.project()
Performs a projection on the tuple. The int parameter is interpreted as a bitmap on the columns. I.e. a bitmap value of 1 projects to the first column, 2 to the second, 3 to the first two columns, and so on. @param bitmap the projection bitmap.

    /* Extract the year from the date element of the order relation: */
    
    /* pice = extendedprice * (1 - discount): */
    float price = Float.parseFloat(inputTuple.getStringValueAt(5)) * (1 - Float.parseFloat(inputTuple.getStringValueAt(6)));
    /* Project (orderkey | partkey, suppkey, linenumber, quantity, extendedprice, discount, tax, ...) to (partkey, suppkey, quantity): */
    inputTuple.project((0 << 0) | (1 << 1) | (1 << 2) | (0 << 3) | (1 << 4));
    inputTuple.addAttribute("" + price);
    record.setField(1, inputTuple);
    out.collect(record);
  }

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  @Test
  public void testProject() {
    
    Tuple t = new Tuple();
    
    t.project(1);
    Assert.assertTrue(t.getNumberOfColumns() == 0);
    
    t.addAttribute("a");
    t.project(0);
    Assert.assertTrue(t.getNumberOfColumns() == 0);

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    t.project(1);
    Assert.assertTrue(t.getNumberOfColumns() == 0);
    
    t.addAttribute("a");
    t.project(0);
    Assert.assertTrue(t.getNumberOfColumns() == 0);


    t.addAttribute("a");
    t.addAttribute("b");
    t.project(2);

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    t.project(0);
    Assert.assertTrue(t.getNumberOfColumns() == 0);


    t.addAttribute("a");
    t.addAttribute("b");
    t.project(2);
    Assert.assertTrue(t.getNumberOfColumns() == 1);
    Assert.assertTrue(t.getStringValueAt(0).equals("b"));
    
    t.addAttribute("c");
    t.addAttribute("d");

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    Assert.assertTrue(t.getNumberOfColumns() == 1);
    Assert.assertTrue(t.getStringValueAt(0).equals("b"));
    
    t.addAttribute("c");
    t.addAttribute("d");
    t.project(5);
    Assert.assertTrue(t.getNumberOfColumns() == 2);
    Assert.assertTrue(t.getStringValueAt(0).equals("b"));
    Assert.assertTrue(t.getStringValueAt(1).equals("d"));
    
    t.project(0);

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    t.project(5);
    Assert.assertTrue(t.getNumberOfColumns() == 2);
    Assert.assertTrue(t.getStringValueAt(0).equals("b"));
    Assert.assertTrue(t.getStringValueAt(1).equals("d"));
    
    t.project(0);
    Assert.assertTrue(t.getNumberOfColumns() == 0);
    
    t.addAttribute("a");
    t.addAttribute("b");
    t.addAttribute("c");

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    t.addAttribute("a");
    t.addAttribute("b");
    t.addAttribute("c");
    t.addAttribute("d");
    t.project(11);
    Assert.assertTrue(t.getNumberOfColumns() == 3);
    Assert.assertTrue(t.getStringValueAt(2).equals("d"));
    
    t.project(23);
    Assert.assertTrue(t.getNumberOfColumns() == 3);

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    t.addAttribute("d");
    t.project(11);
    Assert.assertTrue(t.getNumberOfColumns() == 3);
    Assert.assertTrue(t.getStringValueAt(2).equals("d"));
    
    t.project(23);
    Assert.assertTrue(t.getNumberOfColumns() == 3);
    Assert.assertTrue(t.getStringValueAt(0).equals("a"));
    Assert.assertTrue(t.getStringValueAt(1).equals("b"));
    Assert.assertTrue(t.getStringValueAt(2).equals("d"));

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    Assert.assertTrue(t.getNumberOfColumns() == 3);
    Assert.assertTrue(t.getStringValueAt(0).equals("a"));
    Assert.assertTrue(t.getStringValueAt(1).equals("b"));
    Assert.assertTrue(t.getStringValueAt(2).equals("d"));
    
    t.project(-1);
    Assert.assertTrue(t.getNumberOfColumns() == 3);
    Assert.assertTrue(t.getStringValueAt(0).equals("a"));
    Assert.assertTrue(t.getStringValueAt(1).equals("b"));
    Assert.assertTrue(t.getStringValueAt(2).equals("d"));
  }

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    @Override
    public void join(Record order, Record line, Collector<Record> out)
        throws Exception {
      Tuple orderTuple = order.getField(1, Tuple.class);
      
      orderTuple.project(32);
      String newOrderKey = orderTuple.getStringValueAt(0);
      
      order.setField(0, new StringValue(newOrderKey));
      out.collect(order);
    }

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