HashMapMatXML.m

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classdef HashMapMatXML<mxberry.core.cont.ondisk.AHashMap
    
    properties (Constant,GetAccess=protected)
        MAT_EXTENSION='mat';
        XML_EXTENSION='xml';
        IGNORE_EXTENSIONS={'asv','xml~'};
        ALLOWED_EXTENSIONS={'mat','xml'};
    end
    methods
        function self=HashMapMatXML(varargin)
            import mxberry.core.cont.DiskBasedHashMap;
            import mxberry.core.throwerror;
            import mxberry.xml.*;
            import mxberry.core.parseparext;
            %
            self=self@mxberry.core.cont.ondisk.AHashMap(varargin{:});
            %
            [~,~,self.storageFormat]=parseparext(varargin,...
                {'storageFormat';self.storageFormat;'isstring(x)'});
            %
            switch lower(self.storageFormat)
                case 'mat'
                    self.saveFunc=@save;
                    self.loadKeyFunc=@(x)load(x,'keyStr');
                    self.loadValueFunc=@(x)load(x,'valueObj');
                    self.fileExtension=self.MAT_EXTENSION;
                    self.isMissingKeyBlamed=true;
                case 'xml'
                    self.saveFunc=@(x,y,z)xmlsave(x,...
                        struct(...
                        'valueObj',{evalin('caller',y)},...
                        'keyStr',{evalin('caller',z)}),...
                        'on');
                    self.loadKeyFunc=@xmlload;
                    self.loadValueFunc=@xmlload;
                    self.fileExtension=self.XML_EXTENSION;
                    self.isMissingKeyBlamed=true;
                case 'none'
                otherwise
                    throwerror('wrongInput','unknown storage format');
            end
        end
        %
    end
    methods (Access=protected)
        function valueObj=getOne(self,keyStr)
            import mxberry.core.throwerror;
            WARN_TO_CATCH='badMatFile:wrongState';
            lastwarn('');
            valueObj=getOne@mxberry.core.cont.ondisk.AHashMap(self,keyStr);
            [lastWarnMsg,lastWarnId]=lastwarn();
            nChars=length(WARN_TO_CATCH);
            nWarnChars=length(lastWarnId);
            indStart=max(1,nWarnChars-nChars)+1;
            if strcmp(lastWarnId(indStart:end),WARN_TO_CATCH)
                throwerror('wrongState',lastWarnMsg);
            end
        end
        function [isPositive,keyStr]=checkKey(self,fileName)
            isPositive=mxberry.io.isfile(fileName);
            if ~((strcmp(self.fileExtension,self.XML_EXTENSION))&&...
                    (nargout<2))
                if isPositive
                    [isPositive,keyStr]=...
                        checkKey@mxberry.core.cont.ondisk.AHashMap(...
                        self,fileName);
                end
            end
        end
    end
end