Gem #19: XML streaming of Ada objects Author: Pascal Obry, EDF R&D Abstract: Ada Gem #19 XML streaming of Ada objects Let s get started ¦ Since Ada 95 it has been possible to stream any object. Using 'Input/'Output or 'Read/'Write attributes, any object (tagged or not) can be streamed using a binary representation. This means that objects can be written into a file or sent over a socket, for example. Let s take a simple object hierarchy to illustrate this feature. We ll have a Point (x and y coordinate) and a Pixel (a Point with a color). package Object is type Point is tagged record X, Y : Float; end record; type Color_Name is (Red, Green, Blue); type Pixel is new Point with record Color : Color_Name; end record; end Object; When writing a Point or a Pixel the first bytes in the stream are the tag external representation then the object s attribute values. declare File : File_Type; P : Point'Class := ...; begin Create (File, Out_File, "streamed.data"); Point'Class'Output (Text_Streams.Stream (File), P); Close (File); end; The stream will contain something like (where is the character hexadecimal code): <01> <00> <00> <00> <0C> <00> <00>
End of preview. The entire article is 5 pages. To view the full-text, please rent this article to continue.
/lp/association-for-computing-machinery/gem-19-xml-streaming-of-ada-objects-7rNDqzc4Xo
Welcome to DeepDyve! Rent Premier Research Articles and Save Up to 90%
Gem #19: XML streaming of Ada objects
Obry, Pascal
Follow ACM SIGAda Ada Letters
, Volume 28 (2)
Association for Computing Machinery – Jul 31, 2008
More Info
More Like This Article
View All dataSource[]=actageo&dataSource[]=aspet&dataSource[]=aaos&dataSource[]=aacc&dataSource[]=aacr&dataSource[]=aea&dataSource[]=aip&dataSource[]=ajnr&dataSource[]=ams&dataSource[]=aps_physical&dataSource[]=appi_book&dataSource[]=appi_journal&dataSource[]=apha&dataSource[]=asip&dataSource[]=asm&dataSource[]=asn&dataSource[]=aspb&dataSource[]=avs&dataSource[]=annual_reviews&dataSource[]=arxiv&dataSource[]=acm&dataSource[]=berghahn&dataSource[]=cabi&dataSource[]=clinical_trials&dataSource[]=dailymed&dataSource[]=degruyter&dataSource[]=du_press&dataSource[]=esa&dataSource[]=eu_press&dataSource[]=elsevier&dataSource[]=emerald&dataSource[]=ejtr&dataSource[]=emea&dataSource[]=epo&dataSource[]=faseb&dataSource[]=gsa&dataSource[]=health_affairs&dataSource[]=hindawi&dataSource[]=imanager&dataSource[]=imedpub&dataSource[]=informa_healthcare&dataSource[]=informs&dataSource[]=iop&dataSource[]=iucr&dataSource[]=iospress&dataSource[]=jbjs&dataSource[]=leftcoast&dataSource[]=lu_press&dataSource[]=mesharpe&dataSource[]=mary_ann_liebert&dataSource[]=medline&dataSource[]=mit_press&dataSource[]=nature&dataSource[]=oxford&dataSource[]=pier_professional&dataSource[]=pnas&dataSource[]=portlandpress&dataSource[]=psyc_articles&dataSource[]=psyc_books&dataSource[]=psyc_critiques&dataSource[]=plos_journal&dataSource[]=pubmed_central&dataSource[]=rsna&dataSource[]=rockefeller&dataSource[]=rcn&dataSource[]=ria&dataSource[]=rsc&dataSource[]=sage&dataSource[]=spie&dataSource[]=springer_journal&dataSource[]=springer&dataSource[]=taylor_francis&dataSource[]=aps&dataSource[]=the_scientist&dataSource[]=uc_press&dataSource[]=uspto_abstract&dataSource[]=wiley&dataSource[]=pct
© 2012 DeepDyve, Inc. All rights reserved.
Terms of Service | Privacy Policy
