1  
 2  #include "SingleShotSource.h"
 3  #include "Utilities.h"
 4  #include <string>
 5  
 6  using namespace std;
 7  
 8  CFStringRef gSingleShotSourceName = CFSTR("Single Shot Source");
 9  
10  SingleShotSource::SingleShotSource(CFTypeRef value, Transform* t, CFStringRef name) :
11  	Source(gSingleShotSourceName, t, name)
12  {
13  	SetValue(value);
14  }
15  
16  void SingleShotSource::DoActivate()
17  {
18  	// Make sure our destination doesn't vanish while we are sending it data (or the final NULL)
19  	CFRetainSafe(mDestination->GetCFObject());
20  	
21  	// take our value and send it on its way
22  	mDestination->SetAttribute(mDestinationName, GetValue());
23  	
24  	// send an end of stream
25  	mDestination->SetAttribute(mDestinationName, NULL);
26  
27  	CFReleaseSafe(mDestination->GetCFObject());
28  }
29  
30  
31  
32  Boolean SingleShotSource::Equal(const CoreFoundationObject* obj)
33  {
34  	if (Source::Equal(obj))
35  	{
36  		const SingleShotSource* sss = (const SingleShotSource*) obj;
37  		return CFEqual(GetValue(), sss->GetValue());
38  	}
39  	
40  	return false;
41  }
42  
43  
44  
45  CFTypeRef SingleShotSource::Make(CFTypeRef value, Transform* t, CFStringRef name)
46  {
47  	return CoreFoundationHolder::MakeHolder(gInternalCFObjectName, new SingleShotSource(value, t, name));
48  }
49  
50  
51  
52  std::string SingleShotSource::DebugDescription()
53  {
54  	string result = Source::DebugDescription() + ": SingleShotSource ";
55  	
56  	char buffer[256];
57  	snprintf(buffer, sizeof(buffer), "(value = %p)", GetValue());
58  	
59  	result += buffer;
60  	
61  	return result;
62  }