public static SubstituteConstantsResultWithValues SubstituteConstants(Expression expression)
{
object[] args = null;
SubstituteConstantsResult result;
if (!cachedSubstitutedExpressions.TryGetValue(expression, out result))
{
var values = new List <object>();
var parameters = new List <ParameterExpression>();
var replacement = SqlExpressionReplacer.Replace(expression, c =>
{
if (c.NodeType != ExpressionType.Constant)
{
return(null);
}
var constantExpression = (ConstantExpression)c;
values.Add(constantExpression.Value);
var parameter = Expression.Parameter(constantExpression.Type);
parameters.Add(parameter);
return(parameter);
});
args = values.ToArray();
var parametersArray = parameters.ToArray();
result = new SubstituteConstantsResult(replacement, parametersArray);
cachedSubstitutedExpressions = cachedSubstitutedExpressions.Clone(expression, result, "cachedSubstitutedExpressions");
}
if (args == null)
{
var i = 0;
args = new object[result.AdditionalParameters.Length];
SqlExpressionReplacer.Replace(expression, c =>
{
if (c.NodeType != ExpressionType.Constant)
{
return(null);
}
var constantExpression = (ConstantExpression)c;
args[i++] = constantExpression.Value;
return(null);
});
}
return(new SubstituteConstantsResultWithValues(result, args));
}
public static SubstituteConstantsResultWithValues SubstituteConstants(Expression expression)
{
object[] args = null;
SubstituteConstantsResult result;
if (!cachedSubstitutedExpressions.TryGetValue(expression, out result))
{
var values = new List<object>();
var parameters = new List<ParameterExpression>();
var replacement = SqlExpressionReplacer.Replace(expression, c =>
{
if (c.NodeType != ExpressionType.Constant)
{
return null;
}
var constantExpression = (ConstantExpression)c;
values.Add(constantExpression.Value);
var parameter = Expression.Parameter(constantExpression.Type);
parameters.Add(parameter);
return parameter;
});
args = values.ToArray();
var parametersArray = parameters.ToArray();
result = new SubstituteConstantsResult(replacement, parametersArray);
cachedSubstitutedExpressions = cachedSubstitutedExpressions.Clone(expression, result, "cachedSubstitutedExpressions");
}
if (args == null)
{
var i = 0;
args = new object[result.AdditionalParameters.Length];
SqlExpressionReplacer.Replace(expression, c =>
{
if (c.NodeType != ExpressionType.Constant)
{
return null;
}
var constantExpression = (ConstantExpression)c;
args[i++] = constantExpression.Value;
return null;
});
}
return new SubstituteConstantsResultWithValues(result, args);
}