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Difference between revisions of "EMF Search---Developer Guide"

(Ecore Query & Helper)
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[[Image:EcoreTextualModelSearchQueryBuilderHelper.PNG|Ecore Textual Model Search Query Builder Helper]]
 
[[Image:EcoreTextualModelSearchQueryBuilderHelper.PNG|Ecore Textual Model Search Query Builder Helper]]
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<source lang='java'>
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IModelSearchScope scope = ModelSearchWorkspaceScopeFactory.getInstance().createModelSearchWorkspaceScope("org.eclipse.emf.search.ecoreSearchEngine");
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query = EcoreTextualModelSearchQueryBuilderHelper.getInstance().buildGlobalTextualModelSearchQuery(regex, scope, EcorePackage.eNS_URI);
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query.run(new NullProgressMonitor());
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ISearchResult result = query.getModelSearchResult();
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if (result instanceof IModelSearchResult) {
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                    // Help yourself with model result entry
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    Collection<IModelResultEntry> reultEntries = ((IModelSearchResult)result).getResultsFlatenned();
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}
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</source>
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Revision as of 09:50, 25 April 2008

Introduction

Developers have several levels/contexts/persitences configurations for which they want to use EMF Search.

One aspect is which modeling level they want their extension to address :

  • meta modeling level
    • Ecore meta-modeling (M3)
    • UML2 meta-modeling or custom meta-models (M2)
    • Model instance (M1)


Another aspect is where and how their meta models are stored :

  • meta model perstistence layer type
    • Eclipse Resources
    • Local File System
    • WWW distant resources (Close to be supported)
    • DB persitence (Support planned)


Depending on these particular situations, EMF Search typical usages exist.

Search Scope & Visitors

EMF Search defines a Scope API contract with IModelSearchScope :

    public interface IModelSearchScope<P, O> {
        List<P> getParticipants();
        void addParticipant(P resource);
        void addParticipants(P[] resources);
        void removeParticipant(P resource);
        void removeParticipants(P[] resources);
        List<P> findPartcipant(Class<O> clazz);
        String getLabel();
    }
  • Eclipse Workspace resource
  • Local File System
  • Distant locations (Http URIs)
  • EE repositories

Ecore Query & Helper

Ecore EMF Search comes with several helpers for query building & launching :


Ecore Textual Model Search Query Builder Helper


IModelSearchScope scope = ModelSearchWorkspaceScopeFactory.getInstance().createModelSearchWorkspaceScope("org.eclipse.emf.search.ecoreSearchEngine");
		query = EcoreTextualModelSearchQueryBuilderHelper.getInstance().buildGlobalTextualModelSearchQuery(regex, scope, EcorePackage.eNS_URI);
 
		query.run(new NullProgressMonitor());
 
		ISearchResult result = query.getModelSearchResult();
 
		if (result instanceof IModelSearchResult) {
                    // Help yourself with model result entry
		    Collection<IModelResultEntry> reultEntries = ((IModelSearchResult)result).getResultsFlatenned();
		}



Ecore Textual Model Search Query Launcher Helper

Custom Queries & Helper

Custom Dialogs

Custom Wizards