Examples of ch.agent.crnickl.api.UpdatableSchema

ch.agent.crnickl.api.UpdatableSchema
An UpdatableSchema is a schema which can be modified. A schema can only be modified if it is not in use or if the modification has no consequence on existing use. For example a series can always be added but can only be deleted if no chronicle using the schema has actually created the series.
Updatable schemas are not only used in client applications like schema editors but also by CrNiCKL internally. Any schema can be defined as an extension to another schema. Schemas are kept in permanent storage without resolving these extensions. Before a schema is made available for use, CrNiCKL resolves the extensions. Extensions are visible to clients only in edit mode.
A hypothetical example will help to illustrate how schemas are constructed. The example uses 3 schemas: a, b, and c. Schema a defines two series, s1 and s2, and one attribute, a1. Schema b extends schema a; it removes series s2, and adds series s3. Schema c extends schema b; it adds attribute a2 and redefines attribute a1 (for example with a different default value). Given this design, a chronicle with effective schema c, will have two series, s1 and s3, and two attributes, a1 and a2. It will not be aware of the existence of schemas a and b. @author Jean-Paul Vetterli @version 1.1.0

    }
  }


  public void test_320_delete_non_existing_series() {
    try {
      UpdatableSchema schema4 = db.getUpdatableSchemas("schema4").iterator().next();
      schema4.deleteSeries(1);
      expectException();
    } catch (Exception e) {
      assertException(e, D.D30125);
    }
  }

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      chro.applyUpdates();
      UpdatableSeries<Double> ser = db.getUpdatableSeries("bt.schema1achro.fou", true);
      ser.setValue(Workday.DOMAIN.time("2011-06-30"), 42.);
      ser.applyUpdates();
      // erase the series from the schema (should fail, of course)
      UpdatableSchema sch1 = schema.edit();
      sch1.deleteSeries(1);
      sch1.applyUpdates();
      expectException();
    } catch (Exception e) {
      assertException(e, null, "D30150");
    }
  }

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    try {
      Schema schema = db.getSchemas("schema1a").iterator().next();
      Series<Double> ser = db.getSeries("bt.schema1achro.fou", true);
      assertEquals(42., ser.getValue(Workday.DOMAIN.time("2011-06-30")));
      // renaming the series should be okay 
      UpdatableSchema sch1 = schema.edit();
      //sch1.setSeriesName(1, "fooo"); next line should be equivalent
      sch1.setAttributeDefault(1, 1, "fooo");
      sch1.applyUpdates();
      ser = db.getSeries("bt.schema1achro.fooo", true);
      assertEquals(42., ser.getValue(Workday.DOMAIN.time("2011-06-30")));
    } catch (Exception e) {
      fail(e.getMessage());
    }

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    try {
      Schema schema = db.getSchemas("schema1a").iterator().next();
      Series<Double> ser = db.getSeries("bt.schema1achro.fooo", true);
      assertEquals(42., ser.getValue(Workday.DOMAIN.time("2011-06-30")));
      // changing the time domain should fail 
      UpdatableSchema sch1 = schema.edit();
      sch1.setSeriesTimeDomain(1, DateTime.DOMAIN);
      sch1.applyUpdates();
      expectException();
    } catch (Exception e) {
      assertException(e, D.D30105, D.D30149);
    }
  }

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  public void test_360_update_attribute_value_okay() {
    try {
      Schema schema = db.getSchemas("schema1a").iterator().next();
      Series<Double> ser = db.getSeries("bt.schema1achro.fooo", true);
      UpdatableSchema sch1 = schema.edit();
      sch1.addAttribute(7);
      sch1.setAttributeDefault(7, "foo");
      sch1.setAttributeProperty(7, db.getProperty("prop3", true));
      sch1.applyUpdates();


      // important: get it again
      ser = db.getSeries("bt.schema1achro.fooo", true);
      Attribute<?> sa = ser.getAttribute("prop3", false);
      assertEquals("foo", sa.get().toString());

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  }
  
  public void test_370_series_attribute_overrides_chronicle_attribute() {
    try {
      Schema schema = db.getSchemas("schema1a").iterator().next();
      UpdatableSchema sch1 = schema.edit();
      sch1.addAttribute(1, 5);
      sch1.setAttributeDefault(1, 5, "bar");
      sch1.setAttributeProperty(1, 5, db.getProperty("prop3", true));
      sch1.applyUpdates();


      Series<Double> ser = db.getSeries("bt.schema1achro.fooo", true);
      Attribute<?> sa = ser.getAttribute("prop3", false);
      assertEquals("bar", sa.get().toString());
      Attribute<?> ca = ser.getChronicle().getAttribute("prop3", false);

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      UpdatableChronicle chro = db.getTopChronicle().edit().createChronicle("schema4chro", false, "test chronicle", null, schema);
      chro.applyUpdates();
      UpdatableSeries<Double> ser = db.getUpdatableSeries("bt.schema4chro.fooo", true);
      ser.applyUpdates();
      // note that the series is deleted in the base schema 
      UpdatableSchema sch1 = db.getUpdatableSchemas("schema1a").iterator().next();
      sch1.deleteSeries(1);
      sch1.applyUpdates();
      expectException();
    } catch (Exception e) {
      assertException(e, null, D.D30150);
    }
  }

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    }
  }
  
  public void test_390_delete_and_add_attribute() {
    try {
      UpdatableSchema schema = db.getUpdatableSchemas("schema1a").iterator().next();
      schema.deleteAttribute(1);
      schema.applyUpdates();
      assertEquals(1, schema.getAttributeDefinitions().size());
      // put it back we still need it
      schema.addAttribute(1);
      schema.setAttributeProperty(1, db.getProperty("prop1", true));
      schema.setAttributeDefault(1, "t1v1");
      schema.applyUpdates();
      assertEquals(2, schema.getAttributeDefinitions().size());
    } catch (Exception e) {
      fail(e.getMessage());
    }
  }

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    }
  }
  
  public void test_400_delete_chronicle_attribute_with_actual_values() {
    try {
      UpdatableSchema schema = db.getUpdatableSchemas("schema1a").iterator().next();


      // use the attribute
      UpdatableChronicle chro = db.getChronicle("bt.schema1achro", true).edit();
      assertEquals("t1v1", chro.getAttribute("prop1", true).get().toString());
      Attribute<?> a = chro.getAttribute("prop1", true);
      a.scan("t1v2");
      assertEquals("t1v2", a.get().toString());
      chro.setAttribute(a);
      chro.applyUpdates();
      assertEquals("t1v2", chro.getAttribute("prop1", true).get().toString());
      schema.deleteAttribute(1);
      schema.applyUpdates();
      expectException();
    } catch (Exception e) {
      assertException(e, null, D.D30146);
    }
  }

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      assertEquals("t1v3", a.get().toString());
      chro.setAttribute(a);
      chro.applyUpdates();
      assertEquals("t1v3", chro.getAttribute("prop1", true).get().toString());
      // remove the attribute from the base schema of schema3 (should fail)
      UpdatableSchema schema1 = db.getUpdatableSchemas("schema1a").iterator().next();
      schema1.deleteAttribute(1);
      schema1.applyUpdates();
      expectException();
    } catch (Exception e) {
      assertException(e, null, D.D30146);
    }
  }

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