Examples of er.extensions.eof.ERXEC

er.extensions.eof.ERXEC
Subclass of {@link com.webobjects.eocontrol.EOEditingContext} that has everypublic method overridden to support automatic lock/unlock handling for you. This is very useful, as it is potentially very dangerous to rely on EOFs automatic lock handling - it will invariably lead into deadlocks. As you will need to use this class and its subclasses exclusively as your ECs, it also contains a factory instances. The Factory also sets a default delegate for you and is used everywhere in ERExtensions and ERDirectToWeb. The Factory is actually an interface and you would create a new EC by using: ERXEC.newEditingContext() You can also install your own Factory classes. It is recommended to subclass ERXEC.DefaultFactory and override _createEditingContext() or use the er.extensions.ERXEC.editingContextClassName property to specify the name of the editing context class to be instantiated by ERXEC.DefaultFactory's _createEditingContext() core method. @property er.extensions.ERXEC.useSharedEditingContext @property er.extensions.ERXEC.markOpenLocks @property er.extensions.ERXEC.traceOpenLocks @property er.extensions.ERXEC.useUnlocker @property er.extensions.ERXEC.denyMerges @property er.extensions.ERXEC.defaultAutomaticLockUnlock @property er.extensions.ERXEC.defaultCoalesceAutoLocks @property er.extensions.ERXEC.safeLocking @property er.extensions.ERXEC.editingContextClassName

      ec.unlock();
    }
  }
  
  public void testSimpleQual() {
    ERXEC ec = (ERXEC) ERXEC.newEditingContext();
    ec.lock();
    try {
      
      NSArray<City> cities = City.fetchCities(ec, City.NAME.like("Rotter*"), null);
      
      assertNotNull(cities);
      assertEquals(1, cities.count());
    } finally {
      ec.unlock();
    }
  }

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      ec.unlock();
    }
  }


  public void testCaseInsensativeQual() {
    ERXEC ec = (ERXEC) ERXEC.newEditingContext();
    ec.lock();
    try {
      
      NSArray<City> cities = City.fetchCities(ec, City.NAME.likeInsensitive("roTTer*"), null);
      
      assertNotNull(cities);
      assertEquals(1, cities.count());
    } finally {
      ec.unlock();
    }
  }

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      ec.unlock();
    }
  }
  
  public void testJoin() {
    ERXEC ec = (ERXEC) ERXEC.newEditingContext();
    ec.lock();
    try {
      
      NSArray<City> cities = City.fetchCities(ec, City.COUNTRY.dot(Country.CODE).eq("NLD"), null);
      
      assertNotNull(cities);
      assertEquals(28, cities.count());
    } finally {
      ec.unlock();
    }
  }

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      ec.unlock();
    }
  }
  
  public void testLeftJoin() {
    ERXEC ec = (ERXEC) ERXEC.newEditingContext();
    ec.lock();
    try {
      
      NSArray<Country> countries = Country.fetchCountries(ec, 
          Country.COUNTRY_LANGUAGES.dot(CountryLanguage.LANGUAGE).eq("Dutch").or(  // this is left join
              Country.NAME.like("Nor*"))
          , Country.NAME.ascs());
      
      assertNotNull(countries);
      assertEquals(2, countries.count());
    } finally {
      ec.unlock();
    }
    
  }

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    }
    
  }


  public void testSortOrder() {
    ERXEC ec = (ERXEC) ERXEC.newEditingContext();
    ec.lock();
    try {
      
      NSArray<City> cities = City.fetchCities(ec, City.NAME.like("A*"),  City.NAME.ascInsensitives());
      
      assertNotNull(cities);
      City city = cities.objectAtIndex(0);
      assertNotNull(city);
      log.debug(city.name());
      assertEquals("Alkmaar", city.name());
    } finally {
      ec.unlock();
    }
  }

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      ec.unlock();
    }
  }


  public void testBatchFetch() {
    ERXEC ec = (ERXEC) ERXEC.newEditingContext();
    ec.lock();
    try {
      
      NSArray<Country> countries = Country.fetchAllCountries(ec);
      
      assertNotNull(countries);
      assertEquals(2, countries.count());
      ERXBatchFetchUtilities.batchFetch(countries, Country.CITIES_KEY);
    } finally {
      ec.unlock();
    }
  }

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      ec.unlock();
    }
  }
  
  public void testLimitedFetch() {
    ERXEC ec = (ERXEC) ERXEC.newEditingContext();
    ec.lock();
    try {
      
      EOFetchSpecification fs = new EOFetchSpecification(City.ENTITY_NAME, null, City.NAME.ascs());
      NSArray<City> cities = ERXEOControlUtilities.objectsInRange(ec, fs, 1, 5);
      
      assertNotNull(cities);
      assertEquals(4, cities.count());
    } finally {
      ec.unlock();
    }
  }

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    }
  }


  
  public void testMoreComplexLimitedFetch() {
    ERXEC ec = (ERXEC) ERXEC.newEditingContext();
    ec.lock();
    try {
      
      EOFetchSpecification fs = new EOFetchSpecification(City.ENTITY_NAME, City.COUNTRY.dot(Country.CODE).eq("NLD"), City.NAME.ascs());
      NSArray<City> cities = ERXEOControlUtilities.objectsInRange(ec, fs, 1, 5);
      
      assertNotNull(cities);
      assertEquals(4, cities.count());
    } finally {
      ec.unlock();
    }
  }

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