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Content

...	...	@@ -57,6 +57,52 @@
57	57
58	58	Xtext supports automatic formatting, which is available in the text editor with right-click → //Format// or ctrl+shift+F. However, the formatter must be configured in order to generate good results. Write a formatter configuration that fits well to your syntax by editing the generated file {{code language="none"}}TuringFormatter{{/code}} in the {{code language="none"}}formatting{{/code}} subpackage. Learn how this is done by reading the Xtext reference documentation → Runtime Concepts → Formatting.
59	59
	60	+= Validation =
	61	+
	62	+The generated code includes some automatic validation of models with respect to syntactic issues. If the token sequence in a text file does not conform to the grammar, error markers are shown at appropriate points in the text. However, this should be augmented by semantic validation by checking high-level properties of the model. Implement such a semantic validation by editing the generated file {{code language="none"}}TuringJavaValidator{{/code}} in the {{code language="none"}}validation{{/code}} subpackage. Learn how this is done by reading the Xtext reference documentation → Runtime Concepts → Validation → Custom Validation. You should implement at least the following checks:
	63	+
	64	+* Is there exactly one initial state?
	65	+* Are all states reachable through transitions starting from the initial state?
	66	+
60	60	= Parsing =
61	61
62		-
	69	+The generated code includes a parser for text files in your syntax. This parser is simply used with the same interface as for any other EMF models: resource sets. Your final task for this tutorial is to reuse the Turing controller you implemented in the EMF tutorial for simulating Turing Machine models, this time applying it to {{code language="none"}}.tuxt{{/code}} text files. However, instead of using a fixed path to your model file, we will now use a //menu contribution// in order to set the file path dynamically.
	70	+
	71	+1. Go to the plugin where you created and registered {{code language="none"}}TuringHeadController{{/code}}, the Turing Machine simulator. Open {{code language="none"}}plugin.xml{{/code}} → //Dependencies// and add org.eclipse.ui if not on the list yet. Go to //Extensions// and add org.eclipse.ui.menus.
	72	+1. Add a //menuContribution// element to the new extension and set "popup:org.eclipse.ui.popup.any?after=additions" as //locationURI// (without quotation marks).
	73	+1. Add a //command// element to the //menuContribution// with the following attributes:\\
	74	+1*. //commandId: //de.cau.cs.rtprak.login.setSimFile
	75	+1*. //label: //Set Simulation File
	76	+1. Add a //visibleWhen// element to the //command//, and add an //iterate// element to the //visibleWhen// with the following attributes:\\
	77	+1*. //operator~:// and
	78	+1*. //ifEmpty~:// false
	79	+1. Add an //adapt// element to the //iterate// with the following attribute:\\
	80	+1*. //type~:// org.eclipse.core.resources.IResource
	81	+1. Add a //test// element to the //adapt// with the following attributes:\\
	82	+1*. //property~:// org.eclipse.core.resources.extension
	83	+1*. //value~:// tuxt
	84	+1. Add a new extension org.eclipse.ui.commands and add a //command// element to it with the following attributes:\\
	85	+1*. //id~://de.cau.cs.rtprak.login.setSimFile
	86	+1*. //name~://Set Simulation File
	87	+1*. Click on //defaultHandler// to open a dialog for creation of a new handler class. Name the new class {{code language="none"}}SetFileHandler{{/code}} and put it into some package of that plugin. Remove the suggested interface and set {{code language="none"}}org.eclipse.core.commands.AbstractHandler{{/code}} as superclass instead.
	88	+1. (((
	89	+Use the following method stub for SetFileHandler{{code language="none"}}{{/code}}:
	90	+
	91	+{{code theme="Eclipse" language="java"}}
	92	+ /**
	93	+ * {@inheritDoc}
	94	+ */
	95	+ @Override
	96	+ public Object execute(ExecutionEvent event) throws ExecutionException {
	97	+ ISelection selection = HandlerUtil.getCurrentSelection(event);
	98	+ if (selection instanceof IStructuredSelection) {
	99	+ Object element = ((IStructuredSelection) selection).getFirstElement();
	100	+ if (element instanceof IFile) {
	101	+ IFile file = (IFile) element;
	102	+ // TODO update the static reference to the simulation file
	103	+ }
	104	+ }
	105	+ return null;
	106	+ }
	107	+{{/code}}
	108	+)))

Confluence.Code.ConfluencePageClass[0]

Id

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1		-2982422
	1	+2982426

URL

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1		-https://rtsys.informatik.uni-kiel.de/confluence//wiki/spaces/WS12EclPract/pages/2982422/Textual Modeling with Xtext
	1	+https://rtsys.informatik.uni-kiel.de/confluence//wiki/spaces/WS12EclPract/pages/2982426/Textual Modeling with Xtext