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Rule-based Modeling of Mashups
- 1. Rule-based Modeling of Mashups Adrian Giurca Emilian Pascalau
- 2. Web 1.0, Web 2.0, Web 3.0?
- 9. Implementing Rules (1) { "id": "rule102", "priority": 1, "appliesTo": ["http://localhost/example/"], "eventExpression":{ "type":"mouseover", "target"$X", }, "condition": [ "$X: HTMLImageElement( src=='index_files/34422.jpg‘ )" ], "actions":[ "resizeImage("$X",200,300) ] } function resizeImage(elem,width,height){ try{ elem.setAttribute("width",width); elem.setAttribute("height",height); }catch(e){ alert(e); } } Assuming the DOM contains the following: <img src="index_files/34422.jpg" width="72" height="96"> We can write the rule: When we hover with the mouse over this image element resize the image .
- 10. Implementing Rules (2) {"id": "rule104", "priority": 1, "appliesTo":["http://localhost/example/"], "eventExpression":{ "type":"click", "target":"$X" } , "condition":[ "$X:HTMLAnchorElement (href==‘http://www.informatik.tu-cottbus.de/%7Eagiurca/Publications.htm’, $Y:href)" ], "actions":[ "openPublications($currentEvent,$Y)" ] }
- 11. A Simple Execution Flow … Object _name=$currentEvent _value=Event click Current Variable: $X … evaluatePropertyRestriction … property Binding - using hasAttribute: href … actionToFire openPublications