/// <summary>
/// Initializes a new instance of the <see cref="ExpressionTreeParser"/> class with a custom <see cref="INodeTypeProvider"/> and
/// <see cref="IExpressionTreeProcessor"/> implementation.
/// </summary>
/// <param name="nodeTypeProvider">The <see cref="INodeTypeProvider"/> to use when parsing <see cref="Expression"/> trees. Use
/// <see cref="CreateDefaultNodeTypeProvider"/> to create an instance of <see cref="CompoundNodeTypeProvider"/> that already includes all
/// default node types. (The <see cref="CompoundNodeTypeProvider"/> can be customized as needed by adding or removing
/// <see cref="CompoundNodeTypeProvider.InnerProviders"/>).</param>
/// <param name="processor">The <see cref="IExpressionTreeProcessor"/> to apply to <see cref="Expression"/> trees before parsing their nodes. Use
/// <see cref="CreateDefaultProcessor"/> to create an instance of <see cref="CompoundExpressionTreeProcessor"/> that already includes
/// the default steps. (The <see cref="CompoundExpressionTreeProcessor"/> can be customized as needed by adding or removing
/// <see cref="CompoundExpressionTreeProcessor.InnerProcessors"/>).</param>
public ExpressionTreeParser(INodeTypeProvider nodeTypeProvider, IExpressionTreeProcessor processor)
{
ArgumentUtility.CheckNotNull("nodeTypeProvider", nodeTypeProvider);
ArgumentUtility.CheckNotNull("processor", processor);
_nodeTypeProvider = nodeTypeProvider;
_processor = processor;
_methodCallExpressionParser = new MethodCallExpressionParser(_nodeTypeProvider);
}
public void SetUp ()
{
_methodInfoBasedNodeTypeRegistry = new MethodInfoBasedNodeTypeRegistry ();
_methodInfoBasedNodeTypeRegistry.Register (WhereExpressionNode.GetSupportedMethods(), typeof (WhereExpressionNode));
_methodInfoBasedNodeTypeRegistry.Register (SelectExpressionNode.GetSupportedMethods(), typeof (SelectExpressionNode));
_methodInfoBasedNodeTypeRegistry.Register (TakeExpressionNode.GetSupportedMethods(), typeof (TakeExpressionNode));
_methodInfoBasedNodeTypeRegistry.Register (CountExpressionNode.GetSupportedMethods(), typeof (CountExpressionNode));
_methodInfoBasedNodeTypeRegistry.Register (JoinExpressionNode.GetSupportedMethods(), typeof (JoinExpressionNode));
_parser = new MethodCallExpressionParser (_methodInfoBasedNodeTypeRegistry);
_source = ExpressionNodeObjectMother.CreateMainSource();
}
/// <summary>
/// Initializes a new instance of the <see cref="ExpressionTreeParser"/> class with a custom <see cref="INodeTypeProvider"/> and
/// <see cref="IExpressionTreeProcessor"/> implementation.
/// </summary>
/// <param name="nodeTypeProvider">The <see cref="INodeTypeProvider"/> to use when parsing <see cref="Expression"/> trees. Use
/// <see cref="CreateDefaultNodeTypeProvider"/> to create an instance of <see cref="CompoundNodeTypeProvider"/> that already includes all
/// default node types. (The <see cref="CompoundNodeTypeProvider"/> can be customized as needed by adding or removing
/// <see cref="CompoundNodeTypeProvider.InnerProviders"/>).</param>
/// <param name="processor">The <see cref="IExpressionTreeProcessor"/> to apply to <see cref="Expression"/> trees before parsing their nodes. Use
/// <see cref="CreateDefaultProcessor"/> to create an instance of <see cref="CompoundExpressionTreeProcessor"/> that already includes
/// the default steps. (The <see cref="CompoundExpressionTreeProcessor"/> can be customized as needed by adding or removing
/// <see cref="CompoundExpressionTreeProcessor.InnerProcessors"/>).</param>
public ExpressionTreeParser (INodeTypeProvider nodeTypeProvider, IExpressionTreeProcessor processor)
{
ArgumentUtility.CheckNotNull ("nodeTypeProvider", nodeTypeProvider);
ArgumentUtility.CheckNotNull ("processor", processor);
_nodeTypeProvider = nodeTypeProvider;
_processor = processor;
_methodCallExpressionParser = new MethodCallExpressionParser (_nodeTypeProvider);
}
public void Parse_WithSubQuery_UsesNodeTypeRegistry ()
{
var emptyNodeTypeRegistry = new MethodInfoBasedNodeTypeRegistry ();
emptyNodeTypeRegistry.Register (SelectExpressionNode.GetSupportedMethods(), typeof (SelectExpressionNode));
var parser = new MethodCallExpressionParser (emptyNodeTypeRegistry);
var expression = (MethodCallExpression) ExpressionHelper.MakeExpression<IQueryable<Cook>, IQueryable<int>> (
q => q.Select (s => s.Assistants.Count ()));
var result = parser.Parse ("t", _source, expression.Arguments.Skip (1), expression);
Assert.That (result, Is.InstanceOf (typeof (SelectExpressionNode)));
Assert.That (((SelectExpressionNode) result).Selector, Is.Not.TypeOf (typeof (SubQueryExpression)),
"The given nodeTypeRegistry does not know any query methods, so no SubQueryExpression is generated.");
}
/// <summary>
/// Initializes a new instance of the <see cref="ExpressionTreeParser"/> class with a custom <see cref="INodeTypeProvider"/> and
/// <see cref="IExpressionTreeProcessor"/> implementation.
/// </summary>
/// <param name="nodeTypeProvider">The <see cref="INodeTypeProvider"/> to use when parsing <see cref="Expression"/> trees. Use
/// <see cref="CreateDefaultNodeTypeProvider"/> to create an instance of <see cref="CompoundNodeTypeProvider"/> that already includes all
/// default node types. (The <see cref="CompoundNodeTypeProvider"/> can be customized as needed by adding or removing
/// <see cref="CompoundNodeTypeProvider.InnerProviders"/>).</param>
/// <param name="processor">The <see cref="IExpressionTreeProcessor"/> to apply to <see cref="Expression"/> trees before parsing their nodes. Use
/// <see cref="CreateDefaultProcessor"/> to create an instance of <see cref="CompoundExpressionTreeProcessor"/> that already includes
/// the default steps. (The <see cref="CompoundExpressionTreeProcessor"/> can be customized as needed by adding or removing
/// <see cref="CompoundExpressionTreeProcessor.InnerProcessors"/>).</param>
public ExpressionTreeParser(INodeTypeProvider nodeTypeProvider, IExpressionTreeProcessor processor)
{
_nodeTypeProvider = nodeTypeProvider;
_processor = processor;
_methodCallExpressionParser = new MethodCallExpressionParser(_nodeTypeProvider);
}
