public static Expression ExtractParameters(
[NotNull] Expression expressionTree,
[NotNull] QueryContext queryContext)
{
var functionEvaluationDisabledExpression = new FunctionEvaluationDisablingVisitor().Visit(expressionTree);
var partialEvaluationInfo = EvaluatableTreeFindingExpressionVisitor.Analyze(functionEvaluationDisabledExpression);
var visitor = new ParameterExtractingExpressionVisitor(partialEvaluationInfo, queryContext);
return(visitor.Visit(functionEvaluationDisabledExpression));
}
/// <summary>
/// Takes an expression tree and finds and evaluates all its evaluatable subtrees.
/// </summary>
public static Expression EvaluateIndependentSubtrees(Expression expressionTree, IEvaluatableExpressionFilter evaluatableExpressionFilter)
{
ArgumentUtility.CheckNotNull("expressionTree", expressionTree);
ArgumentUtility.CheckNotNull("evaluatableExpressionFilter", evaluatableExpressionFilter);
var partialEvaluationInfo = EvaluatableTreeFindingExpressionVisitor.Analyze(expressionTree, evaluatableExpressionFilter);
var visitor = new PartialEvaluatingExpressionVisitor(partialEvaluationInfo, evaluatableExpressionFilter);
return(visitor.Visit(expressionTree));
}
public static Expression ExtractParameters(
[NotNull] Expression expression,
[NotNull] QueryContext queryContext,
[NotNull] IEvaluatableExpressionFilter evaluatableExpressionFilter)
{
var partialEvaluationInfo
= EvaluatableTreeFindingExpressionVisitor
.Analyze(expression, evaluatableExpressionFilter);
var visitor = new ParameterExtractingExpressionVisitor(partialEvaluationInfo, queryContext);
return(visitor.Visit(expression));
}
/// <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 virtual Expression ExtractParameters([NotNull] Expression expression)
{
var oldPartialEvaluationInfo = _partialEvaluationInfo;
_partialEvaluationInfo
= EvaluatableTreeFindingExpressionVisitor
.Analyze(expression, _evaluatableExpressionFilter);
try
{
return(Visit(expression));
}
finally
{
_partialEvaluationInfo = oldPartialEvaluationInfo;
}
}
