/// <summary>
/// Replaces the given parameter with a back-reference to the <see cref="IQuerySource"/> corresponding to <paramref name="referencedNode"/>.
/// </summary>
/// <param name="referencedNode">The referenced node.</param>
/// <param name="parameterToReplace">The parameter to replace with a <see cref="QuerySourceReferenceExpression"/>.</param>
/// <param name="expression">The expression in which to replace the parameter.</param>
/// <param name="context">The clause generation context.</param>
/// <returns><paramref name="expression"/>, with <paramref name="parameterToReplace"/> replaced with a <see cref="QuerySourceReferenceExpression"/>
/// pointing to the clause corresponding to <paramref name="referencedNode"/>.</returns>
public static Expression ReplaceParameterWithReference(
IQuerySourceExpressionNode referencedNode,
ParameterExpression parameterToReplace,
Expression expression,
ClauseGenerationContext context)
{
var clause = GetQuerySourceForNode(referencedNode, context);
var referenceExpression = new QuerySourceReferenceExpression(clause);
return(ReplacingExpressionTreeVisitor.Replace(parameterToReplace, referenceExpression, expression));
}
/// <summary>
/// Gets the <see cref="IQuerySource"/> corresponding to the given <paramref name="node"/>, throwing an <see cref="InvalidOperationException"/>
/// if no such clause has been registered in the given <paramref name="context"/>.
/// </summary>
/// <param name="node">The node for which the <see cref="IQuerySource"/> should be returned.</param>
/// <param name="context">The clause generation context.</param>
/// <returns>The <see cref="IQuerySource"/> corresponding to <paramref name="node"/>.</returns>
public static IQuerySource GetQuerySourceForNode(IQuerySourceExpressionNode node, ClauseGenerationContext context)
{
try
{
return((IQuerySource)context.GetContextInfo(node));
}
catch (KeyNotFoundException ex)
{
var message = string.Format(
"Cannot retrieve an IQuerySource for the given {0}. Be sure to call Apply before calling methods that require IQuerySources, and pass in "
+ "the same QuerySourceClauseMapping to both.",
node.GetType().Name);
throw new InvalidOperationException(message, ex);
}
}
/// <summary>
/// Gets the <see cref="IQuerySource"/> corresponding to the given <paramref name="node"/>, throwing an <see cref="InvalidOperationException"/>
/// if no such clause has been registered in the given <paramref name="context"/>.
/// </summary>
/// <param name="node">The node for which the <see cref="IQuerySource"/> should be returned.</param>
/// <param name="context">The clause generation context.</param>
/// <returns>The <see cref="IQuerySource"/> corresponding to <paramref name="node"/>.</returns>
public static IQuerySource GetQuerySourceForNode (IQuerySourceExpressionNode node, ClauseGenerationContext context)
{
try
{
return (IQuerySource) context.GetContextInfo (node);
}
catch (KeyNotFoundException ex)
{
var message = string.Format (
"Cannot retrieve an IQuerySource for the given {0}. Be sure to call Apply before calling methods that require IQuerySources, and pass in "
+ "the same QuerySourceClauseMapping to both.",
node.GetType().Name);
throw new InvalidOperationException (message, ex);
}
}
/// <summary>
/// Replaces the given parameter with a back-reference to the <see cref="IQuerySource"/> corresponding to <paramref name="referencedNode"/>.
/// </summary>
/// <param name="referencedNode">The referenced node.</param>
/// <param name="parameterToReplace">The parameter to replace with a <see cref="QuerySourceReferenceExpression"/>.</param>
/// <param name="expression">The expression in which to replace the parameter.</param>
/// <param name="context">The clause generation context.</param>
/// <returns><paramref name="expression"/>, with <paramref name="parameterToReplace"/> replaced with a <see cref="QuerySourceReferenceExpression"/>
/// pointing to the clause corresponding to <paramref name="referencedNode"/>.</returns>
public static Expression ReplaceParameterWithReference(
IQuerySourceExpressionNode referencedNode,
ParameterExpression parameterToReplace,
Expression expression,
ClauseGenerationContext context)
{
ArgumentUtility.CheckNotNull("referencedNode", referencedNode);
ArgumentUtility.CheckNotNull("parameterToReplace", parameterToReplace);
ArgumentUtility.CheckNotNull("expression", expression);
ArgumentUtility.CheckNotNull("context", context);
var clause = GetQuerySourceForNode(referencedNode, context);
var referenceExpression = new QuerySourceReferenceExpression(clause);
return(ReplacingExpressionTreeVisitor.Replace(parameterToReplace, referenceExpression, expression));
}
/// <summary>
/// Replaces the given parameter with a back-reference to the <see cref="IQuerySource"/> corresponding to <paramref name="referencedNode"/>.
/// </summary>
/// <param name="referencedNode">The referenced node.</param>
/// <param name="parameterToReplace">The parameter to replace with a <see cref="QuerySourceReferenceExpression"/>.</param>
/// <param name="expression">The expression in which to replace the parameter.</param>
/// <param name="context">The clause generation context.</param>
/// <returns><paramref name="expression"/>, with <paramref name="parameterToReplace"/> replaced with a <see cref="QuerySourceReferenceExpression"/>
/// pointing to the clause corresponding to <paramref name="referencedNode"/>.</returns>
public static Expression ReplaceParameterWithReference (
IQuerySourceExpressionNode referencedNode,
ParameterExpression parameterToReplace,
Expression expression,
ClauseGenerationContext context)
{
ArgumentUtility.CheckNotNull ("referencedNode", referencedNode);
ArgumentUtility.CheckNotNull ("parameterToReplace", parameterToReplace);
ArgumentUtility.CheckNotNull ("expression", expression);
ArgumentUtility.CheckNotNull ("context", context);
var clause = GetQuerySourceForNode (referencedNode, context);
var referenceExpression = new QuerySourceReferenceExpression (clause);
return ReplacingExpressionTreeVisitor.Replace (parameterToReplace, referenceExpression, expression);
}
public void SetUp()
{
_context = new ClauseGenerationContext(new MethodInfoBasedNodeTypeRegistry());
_node = new MainSourceExpressionNode("x", Expression.Constant(new int[0]));
_querySource = new MainFromClause("x", typeof(int), Expression.Constant(new int[0]));
}
public void SetUp ()
{
_context = new ClauseGenerationContext (new MethodInfoBasedNodeTypeRegistry());
_node = new MainSourceExpressionNode ("x", Expression.Constant (new int[0]));
_querySource = new MainFromClause ("x", typeof (int), Expression.Constant (new int[0]));
}
