public override IEnumerable <DataBinding> GetBindingsForInformalDescription()
{
for (int i = 0; i < items.Count; i++)
{
IDataSet dataSet = owner.DataSets[i];
foreach (DataBinding dataBinding in items[i].GetBindingsForInformalDescription())
{
yield return(owner.TranslateBinding(dataSet, dataBinding));
}
}
}
/// <summary>
/// Registers a data binding for a given data set and adds the data set
/// to the list of data sets to be enumerated during data binding.
/// Returns a <see cref="IDataAccessor" /> that may be used to
/// retrieve the values associated with the binding.
/// </summary>
/// <remarks>
/// <para>
/// A <see cref="IDataBinder" /> uses this method to register interest
/// in querying a particular <see cref="IDataSet" />. It must do so
/// before <see cref="GetItems" /> is called to ensure that the <see cref="IDataSet"/>
/// is included in the enumeration.
/// </para>
/// </remarks>
/// <param name="dataSet">The data set.</param>
/// <param name="binding">The data binding.</param>
/// <exception cref="ArgumentNullException">Thrown if <paramref name="dataSet"/> or <paramref name="binding"/> is null.</exception>
public IDataAccessor RegisterBinding(IDataSet dataSet, DataBinding binding)
{
if (dataSet == null)
{
throw new ArgumentNullException("dataSet");
}
if (binding == null)
{
throw new ArgumentNullException("binding");
}
if (!joinedDataSet.DataSets.Contains(dataSet))
{
joinedDataSet.AddDataSet(dataSet);
}
DataBinding translatedBinding = joinedDataSet.TranslateBinding(dataSet, binding);
translatedBindings.Add(translatedBinding);
return(new BoundDataAccessor(translatedBinding));
}
public void TranslateBindingThrowsIfDataSetNotAMember()
{
JoinedDataSet dataSet = new JoinedDataSet();
dataSet.TranslateBinding(Mocks.Stub<IDataSet>(), new DataBinding(0, null));
}
public void TranslateBindingSupportsReplaceIndex()
{
JoinedDataSet dataSet = new JoinedDataSet();
DataSource source = new DataSource("dummy");
dataSet.AddDataSet(source);
DataBinding dataBinding = dataSet.TranslateBinding(source, new DataBinding(null, "path"));
Assert.IsNull(dataBinding.Index);
Assert.AreEqual("path", dataBinding.Path);
DataBinding changedDataBinding = dataBinding.ReplaceIndex(5);
Assert.AreEqual(5, changedDataBinding.Index);
Assert.AreEqual("path", dataBinding.Path);
}
public void TranslateBindingThrowsIfDataBindingIsNull()
{
JoinedDataSet dataSet = new JoinedDataSet();
dataSet.TranslateBinding(Mocks.Stub<IDataSet>(), null);
}
public void TranslateBindingThrowsIfDataSetIsNull()
{
JoinedDataSet dataSet = new JoinedDataSet();
dataSet.TranslateBinding(null, new DataBinding(0, null));
}
private void AssertTranslateReplacedIndex(JoinedDataSet joinedDataSet, IDataSet innerDataSet, DataBinding binding, int? expectedIndex, string message)
{
DataBinding translatedBinding = joinedDataSet.TranslateBinding(innerDataSet, binding);
Assert.AreEqual(expectedIndex, translatedBinding.Index, message);
Assert.AreEqual(binding.Path, translatedBinding.Path, "Path should be preserved.");
}
public void GetItemsDelegatesToTheStrategy()
{
JoinedDataSet dataSet = new JoinedDataSet();
IList<KeyValuePair<string, string>> metadata1 = new KeyValuePair<string, string>[]
{
new KeyValuePair<string, string>("abc", "123"),
new KeyValuePair<string, string>("def", "456")
};
IList<KeyValuePair<string, string>> metadata2 = new KeyValuePair<string, string>[]
{
new KeyValuePair<string, string>("ghi", "789"),
};
DataSource dataSet1 = new DataSource("");
dataSet1.AddIndexAlias("path", 1);
dataSet1.AddDataSet(new ItemSequenceDataSet(new IDataItem[]
{
new ListDataItem<int>(new int[] { 1, 2, 3 }, metadata1, false),
new ListDataItem<int>(new int[] { -1, -2, -3 }, metadata2, false)
}, 3));
dataSet.AddDataSet(dataSet1);
IDataSet dataSet2 = new ItemSequenceDataSet(new IDataItem[]
{
new ListDataItem<int>(new int[] { 4, 5 }, metadata2, false),
new ListDataItem<int>(new int[] { -4, -5 }, null, true)
}, 2);
dataSet.AddDataSet(dataSet2);
List<IDataItem> dataSet1Items = new List<IDataItem>(dataSet1.GetItems(EmptyArray<DataBinding>.Instance, true));
List<IDataItem> dataSet2Items = new List<IDataItem>(dataSet2.GetItems(EmptyArray<DataBinding>.Instance, true));
List<IList<IDataItem>> results = new List<IList<IDataItem>>();
results.Add(new IDataItem[] { dataSet1Items[0], dataSet2Items[0] });
results.Add(new IDataItem[] { dataSet1Items[1], dataSet2Items[1] });
IJoinStrategy strategy = Mocks.StrictMock<IJoinStrategy>();
dataSet.Strategy = strategy;
DataBinding pathBinding = new DataBinding(null, "path");
DataBinding indexZeroBinding = new DataBinding(0, null);
DataBinding indexOneBinding = new DataBinding(1, null);
DataBinding indexThreeBinding = new DataBinding(3, null);
DataBinding[] bindings = new DataBinding[]
{
new DataBinding(null, null), // unresolvable binding because no data sets can claim it
pathBinding, // claimed by dataSet1
indexZeroBinding, // claimed by dataSet1
indexThreeBinding, // claimed by dataSet2
dataSet.TranslateBinding(dataSet1, pathBinding), // scoped by dataSet1
dataSet.TranslateBinding(dataSet2, indexOneBinding), // scoped by dataSet2
};
using (Mocks.Record())
{
Expect.Call(strategy.Join(null, null, true)).IgnoreArguments().Do((JoinDelegate)delegate(IList<IDataProvider> joinProviders, IList<ICollection<DataBinding>> joinBindingsPerProvider,
bool includeDynamicItems)
{
Assert.IsTrue(includeDynamicItems);
Assert.AreElementsEqual(new IDataProvider[] { dataSet1, dataSet2 }, joinProviders);
Assert.Count(2, joinBindingsPerProvider);
Assert.AreElementsEqual(new DataBinding[] { pathBinding, indexZeroBinding, pathBinding }, joinBindingsPerProvider[0]);
Assert.AreElementsEqual(new DataBinding[] { indexZeroBinding, indexOneBinding }, joinBindingsPerProvider[1]);
return results;
});
}
using (Mocks.Playback())
{
List<IDataItem> items = new List<IDataItem>(dataSet.GetItems(bindings, true));
Assert.Count(2, items);
Assert.Throws<ArgumentNullException>(delegate { items[0].GetValue(null); });
Assert.Throws<DataBindingException>(delegate { items[0].GetValue(bindings[0]); });
Assert.AreEqual(2, items[0].GetValue(bindings[1]));
Assert.AreEqual(1, items[0].GetValue(bindings[2]));
Assert.AreEqual(4, items[0].GetValue(bindings[3]));
Assert.AreEqual(2, items[0].GetValue(bindings[4]));
Assert.AreEqual(5, items[0].GetValue(bindings[5]));
PropertyBag map = DataItemUtils.GetMetadata(items[0]);
Assert.Count(3, map);
Assert.AreEqual("123", map.GetValue("abc"));
Assert.AreEqual("456", map.GetValue("def"));
Assert.AreEqual("789", map.GetValue("ghi"));
Assert.IsFalse(items[0].IsDynamic);
Assert.Throws<DataBindingException>(delegate { items[1].GetValue(bindings[0]); });
Assert.AreEqual(-2, items[1].GetValue(bindings[1]));
Assert.AreEqual(-1, items[1].GetValue(bindings[2]));
Assert.AreEqual(-4, items[1].GetValue(bindings[3]));
Assert.AreEqual(-2, items[1].GetValue(bindings[4]));
Assert.AreEqual(-5, items[1].GetValue(bindings[5]));
map = DataItemUtils.GetMetadata(items[1]);
Assert.Count(1, map);
Assert.AreEqual("789", map.GetValue("ghi"));
Assert.IsTrue(items[1].IsDynamic);
}
}
public void CanBindResolvesScopedBindings()
{
JoinedDataSet dataSet = new JoinedDataSet();
DataSource dataSet1 = new DataSource("");
dataSet1.AddIndexAlias("path", 1);
dataSet1.AddDataSet(new ItemSequenceDataSet(EmptyArray<IDataItem>.Instance, 3));
IDataSet dataSet2 = new ItemSequenceDataSet(EmptyArray<IDataItem>.Instance, 2);
dataSet.AddDataSet(dataSet1);
dataSet.AddDataSet(dataSet2);
Assert.IsFalse(dataSet.CanBind(dataSet.TranslateBinding(dataSet1, new DataBinding(null, null))),
"Cannot bind because there is no path or index in the translated binding.");
Assert.IsFalse(dataSet.CanBind(dataSet.TranslateBinding(dataSet1, new DataBinding(3, null))),
"Cannot bind because index 3 is beyond the range of columns in the scoped data set.");
Assert.IsFalse(dataSet.CanBind(dataSet.TranslateBinding(dataSet2, new DataBinding(2, null))),
"Cannot bind because index 2 is beyond the range of columns in the scoped data set.");
Assert.IsTrue(dataSet.CanBind(dataSet.TranslateBinding(dataSet2, new DataBinding(1, null))),
"Can bind because index 1 is within the range of columns in the scoped data set.");
Assert.IsTrue(dataSet.CanBind(dataSet.TranslateBinding(dataSet1, new DataBinding(null, "path"))),
"Can bind because path is supported by one of the scoped data set.");
Assert.IsFalse(dataSet.CanBind(dataSet.TranslateBinding(dataSet2, new DataBinding(null, "path"))),
"Cannot bind because path is supported by one of the scoped data set.");
}
