Examples of eu.stratosphere.api.java.tuple.Tuple

eu.stratosphere.api.java.tuple.Tuple
The base class of all tuples. Tuples have a fix length and contain a set of fields, which may all be of different types. Because Tuples are strongly typed, each distinct tuple length is represented by its own class. Tuples exists with up to 25 fields and are described in the classes {@link Tuple1} to {@link Tuple25}.
The fields in the tuples may be accessed directly a public fields, or via position (zero indexed) {@link #getField(int)}.
Tuples are in principle serializable. However, they may contain non-serializable fields, in which case serialization will fail.

    if (expected.length != found.length) {
      throw new IllegalArgumentException();
    }
    
    for (int i = 0; i < expected.length; i++) {
      Tuple v1 = (Tuple) expected[i];
      Tuple v2 = (Tuple) found[i];
      
      for (int k = 0; k < v1.getArity(); k++) {
        Object o1 = v1.getField(k);
        Object o2 = v2.getField(k);
        Assert.assertEquals(o1, o2);
      }
    }
  }

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  public static <X> TypeInformation<X> getForObject(X value) {
    Validate.notNull(value);
    
    // check if we can extract the types from tuples, otherwise work with the class
    if (value instanceof Tuple) {
      Tuple t = (Tuple) value;
      int numFields = t.getArity();
      
      TypeInformation<?>[] infos = new TypeInformation[numFields];
      for (int i = 0; i < numFields; i++) {
        Object field = t.getField(i);
        
        if (field == null) {
          throw new InvalidTypesException("Automatic type extraction is not possible on candidates with null values. "
              + "Please specify the types directly.");
        }

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  @Override
  public Tuple2<K, T> map(T value) throws Exception {
    
    Tuple v = (Tuple) value;
    
    K key = v.getField(pos);
    tuple.f0 = key;
    tuple.f1 = value;
    
    return tuple;
  }

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    edgesUsed = true;
    
    outValue.f1 = m;
    
    while (edges.hasNext()) {
      Tuple next = (Tuple) edges.next();
      VertexKey k = next.getField(1);
      outValue.f0 = k;
      out.collect(outValue);
    }
  }

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