/// <summary>
/// This API supports the Entity Framework Core infrastructure and is not intended to be used
/// directly from your code. This API may change or be removed in future releases.
/// </summary>
public CompiledQuery(LambdaExpression queryExpression)
{
Type contextType;
switch (queryExpression.Body)
{
case MethodCallExpression methodCall:
contextType = (methodCall.Arguments[0] as MethodCallExpression)?.Type.GenericTypeArguments[0];
break;
default:
throw new NotSupportedException();
}
if (contextType == null)
{
var q = new DummyQueryContext <T>();
SqlStatement = q.GetQuery(queryExpression.Body);
}
else
{
var queryContextType = typeof(DummyQueryContext <>).MakeGenericType(contextType);
object q = Activator.CreateInstance(queryContextType);
var methodInfo = queryContextType.GetMethod(nameof(DummyQueryContext <object> .GetQuery));
if (methodInfo == null)
{
throw new MissingMethodException();
}
SqlStatement = methodInfo.Invoke(q, new object[] { queryExpression.Body }) as string;
}
}
/// <summary>
/// This API supports the Entity Framework Core infrastructure and is not intended to be used
/// directly from your code. This API may change or be removed in future releases.
/// </summary>
public CompiledQuery(LambdaExpression queryExpression, IQueryExecutor queryExecutor)
{
QueryExecutor = queryExecutor ?? throw new ArgumentNullException(nameof(queryExecutor));
Type contextType;
switch (queryExpression.Body)
{
case MethodCallExpression methodCall:
if (methodCall.Arguments.Any() && methodCall.Arguments[0] is MethodCallExpression methodCallExpression)
{
contextType = methodCallExpression.Type.GenericTypeArguments[0];
}
else
{
contextType = methodCall.Object?.Type.GenericTypeArguments.FirstOrDefault() ?? methodCall.Type;
}
break;
default:
throw new NotSupportedException();
}
TranslatedQuery translatedQuery;
if (contextType == null)
{
var q = new DummyQueryContext <T>();
translatedQuery = q.GetQuery(queryExpression.Body);
}
else
{
var queryContextType = typeof(DummyQueryContext <>).MakeGenericType(contextType);
var q = Activator.CreateInstance(queryContextType);
var methodInfo = queryContextType.GetMethod(nameof(DummyQueryContext <object> .GetQuery));
if (methodInfo == null)
{
throw new MissingMethodException();
}
translatedQuery = (TranslatedQuery)methodInfo.Invoke(q, new object[] { queryExpression.Body });
}
SqlStatement = translatedQuery.SqlStatement;
QueryResultMethod = translatedQuery.ResultMethod;
}
/// <summary>
/// This API supports the Entity Framework Core infrastructure and is not intended to be used
/// directly from your code. This API may change or be removed in future releases.
/// </summary>
public CompiledQuery(LambdaExpression queryExpression, IQueryExecutor queryExecutor)
{
QueryExecutor = queryExecutor ?? throw new ArgumentNullException(nameof(queryExecutor));
Type contextType;
if (queryExpression.Body is MethodCallExpression methodCall)
{
var rootMethodCall = GetRootMethodCall(methodCall);
if (methodCall != rootMethodCall)
{
contextType = rootMethodCall.Type.GenericTypeArguments[0];
}
else
{
contextType = rootMethodCall.Object?.Type.GenericTypeArguments.FirstOrDefault() ?? rootMethodCall.Type;
}
}
else
{
throw new NotSupportedException();
}
if (contextType == null)
{
var q = new DummyQueryContext <T>();
TranslatedQuery = q.GetQuery(queryExpression.Body);
}
else
{
var queryContextType = typeof(DummyQueryContext <>).MakeGenericType(contextType);
object q = Activator.CreateInstance(queryContextType);
var methodInfo = queryContextType.GetMethod(nameof(DummyQueryContext <object> .GetQuery));
if (methodInfo == null)
{
throw new MissingMethodException();
}
TranslatedQuery = (TranslatedQuery)methodInfo.Invoke(q, new object[] { queryExpression.Body });
}
}