public static ReadOnlyDictionaryRangeActiveExpression <TKey, TValue, TResult> Create(IReadOnlyDictionary <TKey, TValue> source, Expression <Func <TKey, TValue, TResult> > expression, ActiveExpressionOptions?options = null)
{
ReadOnlyDictionaryRangeActiveExpression <TKey, TValue, TResult> rangeActiveExpression;
bool monitorCreated;
var key = new RangeActiveExpressionsKey(source, expression, options);
lock (rangeActiveExpressionsAccess)
{
if (monitorCreated = !rangeActiveExpressions.TryGetValue(key, out rangeActiveExpression))
{
rangeActiveExpression = new ReadOnlyDictionaryRangeActiveExpression <TKey, TValue, TResult>(source, expression, options, key);
rangeActiveExpressions.Add(key, rangeActiveExpression);
}
++rangeActiveExpression.disposalCount;
}
if (monitorCreated)
{
rangeActiveExpression.Initialize();
}
return(rangeActiveExpression);
}
ReadOnlyDictionaryRangeActiveExpression(IReadOnlyDictionary <TKey, TValue> source, Expression <Func <TKey, TValue, TResult> > expression, ActiveExpressionOptions?options, RangeActiveExpressionsKey rangeActiveExpressionsKey)
{
this.source = source;
this.expression = expression;
Options = options;
this.rangeActiveExpressionsKey = rangeActiveExpressionsKey;
activeExpressions = this.source.CreateSimilarDictionary <TKey, TValue, IActiveExpression <TKey, TValue, TResult> >();
}
