Diffusion Instrument Control (TekRSA-Freq-vs-Time) Browse

MyCollector.m
a0b6d8dfdf6dTekRSA-Freq-vs-Time

MyCollector.m
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			classdef MyCollector < MySingleton & matlab.mixin.Copyable
			properties (Access=public, SetObservable=true)
			InstrList % Structure accomodating instruments
			InstrProps % Properties of instruments
			MeasHeaders
			collect_flag
			end

			properties (Access=private)
			Listeners
			end

			properties (Dependent=true)
			running_instruments
			end

			events
			NewDataWithHeaders
			end

			methods (Access=private)
			% Constructor of a singleton class must be private
			function this=MyCollector(varargin)
			p=inputParser;
			addParameter(p,'InstrHandles',{});
			parse(p,varargin{:});

			this.collect_flag=true;

			if ~isempty(p.Results.InstrHandles)
			cellfun(@(x) addInstrument(this,x),p.Results.InstrHandles);
			end

			this.MeasHeaders=MyMetadata();
			this.InstrList=struct();
			this.InstrProps=struct();
			this.Listeners=struct();
			end
			end

			methods (Access=public)

			function delete(this)
			cellfun(@(x) deleteListeners(this,x), this.running_instruments);
			end

			function addInstrument(this,instr_handle,varargin)
			p=inputParser;
			addParameter(p,'name','UnknownDevice',@ischar)
			parse(p,varargin{:});

			%Find a name for the instrument
			if ~ismember('name',p.UsingDefaults)
			name=p.Results.name;
			elseif isprop(instr_handle,'name') && ~isempty(instr_handle.name)
			name=genvarname(instr_handle.name, this.running_instruments);
			else
			name=genvarname(p.Results.name, this.running_instruments);
			end

			if ismethod(instr_handle, 'readHeader')
			%Defaults to read header
			this.InstrProps.(name).header_flag=true;
			else
			% If class does not have readHeader function, it can still
			% be added to the collector to transfer trace to Daq
			this.InstrProps.(name).header_flag=false;
			warning(['%s does not have a readHeader function, ',...
			'measurement headers will not be collected from ',...
			'this instrument.'],name)
			end
			this.InstrList.(name)=instr_handle;

			%If the added instrument has a newdata event, we add a listener for it.
			if contains('NewData',events(this.InstrList.(name)))
			this.Listeners.(name).NewData=...
			addlistener(this.InstrList.(name),'NewData',...
			@(~,InstrEventData) acquireData(this, InstrEventData));
			end

			%Cleans up if the instrument is closed
			this.Listeners.(name).Deletion=...
			addlistener(this.InstrList.(name),'ObjectBeingDestroyed',...
			@(~,~) deleteInstrument(this,name));
			end

			function acquireData(this, InstrEventData)
			src=InstrEventData.Source;

			% Check that event data object is MyNewDataEvent,
			% and fix otherwise
			if ~isa(InstrEventData,'MyNewDataEvent')
			InstrEventData=MyNewDataEvent();
			InstrEventData.new_header=true;
			InstrEventData.Trace=copy(src.Trace);
			try
			InstrEventData.src_name=src.name;
			catch
			InstrEventData.src_name='UnknownDevice';
			end
			end

			% Collect the headers if the flag is on and if the triggering
			% instrument does not request suppression of header collection
			if this.collect_flag && InstrEventData.new_header
			this.MeasHeaders=MyMetadata();
			%Add field indicating the time when the trace was acquired
			addTimeField(this.MeasHeaders, 'AcquisitionTime')
			addField(this.MeasHeaders,'AcquiringInstrument')
			%src_name is a valid matlab variable name as ensured by
			%its set method
			addParam(this.MeasHeaders,'AcquiringInstrument',...
			'Name', InstrEventData.src_name);
			acquireHeaders(this);

			%We copy the MeasHeaders to both copies of the trace - the
			%one that is with the source and the one that is forwarded
			%to Daq.
			InstrEventData.Trace.MeasHeaders=copy(this.MeasHeaders);
			src.Trace.MeasHeaders=copy(this.MeasHeaders);
			end

			triggerNewDataWithHeaders(this,InstrEventData);
			end

			%Collects headers for open instruments with the header flag on
			function acquireHeaders(this)
			for i=1:length(this.running_instruments)
			name=this.running_instruments{i};

			if this.InstrProps.(name).header_flag
			try
			TmpMetadata=readHeader(this.InstrList.(name));
			addMetadata(this.MeasHeaders, TmpMetadata);
			catch
			warning(['Error while reading metadata from %s. '...
			'Measurement header collection is switched '...
			'off for this instrument.'],name)
			this.InstrProps.(name).header_flag=false;
			end

			end
			end
			end

			function clearHeaders(this)
			this.MeasHeaders=MyMetadata();
			end

			function bool=isrunning(this,name)
			assert(~isempty(name),'Instrument name must be specified')
			assert(ischar(name)&&isvector(name),...
			'Instrument name must be a character vector, not %s',...
			class(name));
			bool=ismember(name,this.running_instruments);
			end

			function deleteInstrument(this,name)
			if isrunning(this,name)
			%We remove the instrument
			this.InstrList=rmfield(this.InstrList,name);
			this.InstrProps=rmfield(this.InstrProps,name);
			deleteListeners(this,name);
			end
			end

			end

			methods(Static)
			% Concrete implementation of the singletone constructor.
			function this = instance()
			persistent UniqueInstance

			if isempty(UniqueInstance)\|\|(~isvalid(UniqueInstance))
			disp('Creating new instance of MyCollector')
			this = MyCollector();
			UniqueInstance = this;
			else
			this = UniqueInstance;
			end
			end
			end

			methods (Access=private)
			function triggerNewDataWithHeaders(this,InstrEventData)
			notify(this,'NewDataWithHeaders',InstrEventData);
			end

			%deleteListeners is in a separate file
			deleteListeners(this, obj_name);
			end

			methods
			function running_instruments=get.running_instruments(this)
			running_instruments=fieldnames(this.InstrList);
			end
			end
			end

rINSTCONTROL/@MyCollector/MyCollector.ma0b6d8dfdf6dTekRSA-Freq-vs-Time

MyCollector.mView Options

rINSTCONTROL/@MyCollector/MyCollector.m
a0b6d8dfdf6dTekRSA-Freq-vs-Time

MyCollector.m
View Options