/// <summary>
/// Counts all the entities of the specified type matching the specified values.
/// </summary>
/// <param name="type">The type of entity to retrieve.</param>
/// <param name="parameters">The parameters to query with.</param>
/// <returns>The total number of entities counted.</returns>
public override int CountEntities <T>(string propertyName, object propertyValue)
{
int total = 0;
Type type = typeof(T);
//using (LogGroup logGroup = LogGroup.StartDebug("Counting the entities of the specified type with a property matching the provided name and value."))
//{
// LogWriter.Debug("Type: " + type.ToString());
// LogWriter.Debug("Property name: " + propertyName);
// LogWriter.Debug("Property value: " + (propertyValue == null ? "[null]" : propertyValue.ToString()));
Db4oDataStore store = ((Db4oDataStore)GetDataStore(type));
if (store != null)
{
if (store.ObjectContainer != null)
{
IQuery query = store.ObjectContainer.Query();
query.Constrain(typeof(T));
query.Descend(EntitiesUtilities.GetFieldName(typeof(T), propertyName)).Constrain(propertyValue);
IObjectSet os = query.Execute();
total = os.Count;
}
}
//LogWriter.Debug("Results: " + results.Count.ToString());
//}
return(total);
}
public void Test_GetFieldName()
{
TestArticle article = new TestArticle();
article.ID = Guid.NewGuid();
string fieldName = EntitiesUtilities.GetFieldName(article.GetType(), "Title");
Assert.AreEqual("title", fieldName, "Incorrect field name returned.");
}
/// <summary>
/// Retrieves all the entities of the specified type with the specified property matching the provided value.
/// </summary>
/// <param name="propertyName">The name of the property to check the value of.</param>
/// <param name="propertyValue">The value to check for on the specified property.</param>
/// <returns>The entities that match the provided parameters.</returns>
public override IEntity[] GetEntities(Type type, string propertyName, object propertyValue)
{
Collection <IEntity> results = new Collection <IEntity>();
using (LogGroup logGroup = LogGroup.StartDebug("Retrieving the entities of the specified type with a property matching the provided name and value."))
{
if (type == null)
{
throw new ArgumentNullException("type");
}
if (propertyName == null || propertyName == String.Empty)
{
throw new ArgumentException("A property name must be provided.", "propertyName");
}
if (!EntityState.IsType(type))
{
throw new ArgumentException("The provided '" + type.Name + "' type is not registered as a valid entity type.");
}
LogWriter.Debug("Type: " + type.ToString());
LogWriter.Debug("Property name: " + propertyName);
LogWriter.Debug("Property value: " + (propertyValue == null ? "[null]" : propertyValue.ToString()));
Db4oDataStore store = ((Db4oDataStore)GetDataStore(type));
if (store != null)
{
if (store.ObjectContainer != null)
{
IQuery query = store.ObjectContainer.Query();
query.Constrain(type);
query.Descend(EntitiesUtilities.GetFieldName(type, propertyName))
.Constrain(propertyValue);
IObjectSet os = query.Execute();
while (os.HasNext())
{
results.Add((IEntity)os.Next());
}
}
}
LogWriter.Debug("Entities #: " + results.Count.ToString());
}
return(Release(results.ToArray()));
}