private EnumerateResponse HandleOptimizedEnumerate(EnumerationContextKey contextKey, EnumerateRequest request, EnumerationContext context)
{
int maxElements = request.MaxElements != null
? request.MaxElements.Value
: 1;
if (request.EnumerationMode == EnumerationMode.EnumerateEPR)
{
IEnumerator <object> enumerator = GetHandler(request.Filter).Enumerate(context).GetEnumerator();
bool endOfSequence;
EnumerationItemList items = new EnumerationItemList(PullItems(maxElements, request.EnumerationMode, enumerator, out endOfSequence));
if (!endOfSequence)
{
_activeEnumerations[contextKey] = new EnumerationState(enumerator, request.EnumerationMode);
}
return(new EnumerateResponse
{
Items = items,
EndOfSequence = endOfSequence ? new EndOfSequence() : null,
EnumerationContext = endOfSequence ? null : contextKey
});
}
throw new NotSupportedException();
}
private EnumerateResponse HandleOptimizedEnumerate(EnumerationContextKey contextKey, EnumerateRequest request, EnumerationContext context)
{
int maxElements = request.MaxElements != null
? request.MaxElements.Value
: 1;
if (request.EnumerationMode == EnumerationMode.EnumerateEPR)
{
IEnumerator<object> enumerator = GetHandler(request.Filter).Enumerate(context).GetEnumerator();
bool endOfSequence;
EnumerationItemList items = new EnumerationItemList(PullItems(maxElements, request.EnumerationMode,enumerator, out endOfSequence));
if (!endOfSequence)
{
_activeEnumerations[contextKey] = new EnumerationState(enumerator, request.EnumerationMode);
}
return new EnumerateResponse
{
Items = items,
EndOfSequence = endOfSequence ? new EndOfSequence() : null,
EnumerationContext = endOfSequence ? null : contextKey
};
}
throw new NotSupportedException();
}
public EnumerateResponse Enumerate(EnumerateRequest request)
{
EnumerationContextKey contextKey = EnumerationContextKey.Unique();
EnumerationContext context = new EnumerationContext(contextKey.Text, request.Filter, SelectorSetHeader.GetCurrent());
if (RequestTotalItemsCountEstimate.IsPresent)
{
HandleCountEnumerate(contextKey.Text, request.Filter);
return(new EnumerateResponse
{
EnumerationContext = contextKey
});
}
if (request.OptimizeEnumeration != null)
{
return(HandleOptimizedEnumerate(contextKey, request, context));
}
IEnumerator <object> enumerator = GetHandler(request.Filter).Enumerate(context).GetEnumerator();
_activeEnumerations[contextKey] = new EnumerationState(enumerator, request.EnumerationMode);
return(new EnumerateResponse
{
EnumerationContext = contextKey,
Expires = request.Expires
});
}
private PullResponse PullNextEPRBatch(EnumerationContextKey context, string resourceUri, int maxElements, IEnumerable <Selector> selectors)
{
using (ClientContext <IWSEnumerationContract> ctx =
new ClientContext <IWSEnumerationContract>(_endpointUri, _binding.MessageVersion.Addressing, _proxyFactory,
mx =>
{
mx.Add(new ResourceUriHeader(resourceUri));
mx.Add(new SelectorSetHeader(selectors));
}))
{
FilterMapExtension.Activate(_filterMap);
EnumerationModeExtension.Activate(EnumerationMode.EnumerateEPR, null);
return(ctx.Channel.Pull(new PullRequest
{
EnumerationContext = context,
MaxElements = new MaxElements(maxElements)
}));
}
}
public IEnumerable <EndpointAddress> EnumerateEPR(Uri resourceUri, Filter filter, int maxElements, IEnumerable <Selector> selectors)
{
EnumerateResponse response;
using (ClientContext <IWSEnumerationContract> ctx =
new ClientContext <IWSEnumerationContract>(_endpointUri, _binding.MessageVersion.Addressing, _proxyFactory,
mx =>
{
mx.Add(new ResourceUriHeader(resourceUri.ToString()));
mx.Add(new SelectorSetHeader(selectors));
}))
{
FilterMapExtension.Activate(_filterMap);
EnumerationModeExtension.Activate(EnumerationMode.EnumerateEPR, null);
response = ctx.Channel.Enumerate(new EnumerateRequest
{
EnumerationMode = EnumerationMode.EnumerateEPR,
OptimizeEnumeration = _optimize ? new OptimizeEnumeration() : null,
Filter = filter,
MaxElements = new MaxElements(maxElements)
});
}
if (response.Items != null)
{
foreach (EnumerationItem item in response.Items.Items)
{
yield return(item.EprValue);
}
}
EnumerationContextKey context = response.EnumerationContext;
bool endOfSequence = response.EndOfSequence != null;
while (!endOfSequence)
{
PullResponse pullResponse = PullNextEPRBatch(context, resourceUri.ToString(), maxElements, selectors);
foreach (EnumerationItem item in pullResponse.Items.Items)
{
yield return(item.EprValue);
}
endOfSequence = pullResponse.EndOfSequence != null;
context = pullResponse.EnumerationContext;
}
}
public override bool Equals(object obj)
{
EnumerationContextKey other = obj as EnumerationContextKey;
return(other != null && Text.Equals(other.Text));
}
private PullResponse PullNextEPRBatch(EnumerationContextKey context, string resourceUri, int maxElements, IEnumerable<Selector> selectors)
{
using (ClientContext<IWSEnumerationContract> ctx =
new ClientContext<IWSEnumerationContract>(_endpointUri, _binding.MessageVersion.Addressing, _proxyFactory,
mx =>
{
mx.Add(new ResourceUriHeader(resourceUri));
mx.Add(new SelectorSetHeader(selectors));
}))
{
FilterMapExtension.Activate(_filterMap);
EnumerationModeExtension.Activate(EnumerationMode.EnumerateEPR, null);
return ctx.Channel.Pull(new PullRequest
{
EnumerationContext = context,
MaxElements = new MaxElements(maxElements)
});
}
}
