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− | {{MoDiscoFacetManagerTabs}}
| + | #REDIRECT [[MoDisco/Moved To Help Center]] |
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− | ==How to create a model facet set==
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− | The first step is to [[MoDisco/ProjectNature|create
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− | a MoDisco project]].
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− | The second step is to [[MoDisco/QueryManager|create
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− | a query set]]. This query set will store boolean queries indicating if an
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− | object conforms to a facet.
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− | Right-click on the MoDisco project and select the "New > Other
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− | ..." button.
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− | [[Image:MoDisco_Role_newRoleSet_001.gif]] | + | |
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− | Select "Facet Model" and press the "Next" button
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− | [[Image:MoDisco_Role_newRoleSet_002.gif]]
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− | Choose a name for your model facet set (My.facetSet in the example)
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− | and press "Next".
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− | [[Image:MoDisco_Role_newRoleSet_003.gif]]
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− | Select "FacetSet" in the "Model Object" list and press "Finish"
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− | [[Image:MoDisco_Role_newRoleSet_004.gif]]
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− | [[Image:MoDisco_Role_newRoleSet_005.gif]]
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− | Open the "My.facetSet" file and open the "Properties View"
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− | [[Image:MoDisco_Role_newRoleSet_006.gif]]
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− | Set the name of the facet set and make sure that the facet set name
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− | is the same as the containing file name ("My" in the example). The
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− | nsURI and prefix must also be filled.
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− | [[Image:MoDisco_Role_newRoleSet_007.gif]]
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− | Load the resources containing the meta-model extended by the
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− | facet set. To load a meta-model resource the user must use the "Load
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− | meta-model resource" action.
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− | [[Image:MoDisco_Role_newRoleSet_008.gif]]
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− | In this example, we choose to use the Java meta-model.
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− | [[Image:MoDisco_Role_newRoleSet_009.gif]]
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− | Fill the "Extended package" field with the ePackages
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− | containing the virtually extended meta-model.
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− | [[Image:MoDisco_Role_newRoleSet_010.gif]]
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− | Right click on the FacetSet element and choose the "New Child > Facet"
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− | action to create a facet.
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− | [[Image:MoDisco_Role_newRoleSet_011.gif]]
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− | Set the facet name and the class that the facet will extend.
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− | [[Image:MoDisco_Role_newRoleSet_012.gif]]
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− | To specify how to know if an object conforms to a facet, we have
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− | to provide a boolean query. To provide this query we have to load the
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− | model containing its description.
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− | [[Image:MoDisco_Role_newRoleSet_013.gif]]
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− | The query has to be referred to using the MoDisco protocol:
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− | "modisco:/query/<querySetName>". In the example, we use the "My"
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− | query set.
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− | [[Image:MoDisco_Role_newRoleSet_014.gif]]
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− | Once the query set resource is referenced, we just have to select the
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− | query describing the facet. In the example this query is named
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− | "isAbstract".
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− | [[Image:MoDisco_Role_newRoleSet_015.gif]]
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− | At this step, if we save the model, the "red cross" should disappear
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− | from the file icon. This means that the facet set model is now valid.
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− | [[Image:MoDisco_Role_newRoleSet_016.gif]]
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− | If the facet has specific attributes or references which can be
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− | calculated, we can declare them. In this example, we will declare an
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− | attribute indicating the number of abstract methods contained in the
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− | abstract class. To create a new facet attribute right-click on the facet
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− | element and select the "New Child > FacetAttribute" item.
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− | [[Image:MoDisco_Role_newRoleSet_017.gif]]
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− | The attribute's type and name must be set. The "Value Query" field must
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− | be filled with a reference to a query which is used to calculate the
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− | attribute's value. This query must have the same type as the attribute
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− | and be applicable to the virtually extended class.
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− | [[Image:MoDisco_Role_newRoleSet_018.gif]]
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− | The facet set is now ready to be used.
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− | == How to consult the MoDisco facet set catalog through the UI ==
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− | If a facet set model is valid, it is registered in the facet set
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− | catalog. To consult the facet set catalog, we can use the "Facet Set"
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− | view.
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− | To open this view select "Windows > Show view > Other ..."
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− | in the menu bar and choose "Facet Set" in the list.
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− | [[Image:MoDisco_Role_newRoleSet_019.gif]]
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− | [[Image:MoDisco_Role_newRoleSet_020.gif]]
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− | The "Facet set" view presents the available facet sets and their
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− | facets. For each facet set the location of its description model is pointed out.
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− | [[Image:MoDisco_Role_newRoleSet_021.gif]]
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− | == How to programmatically use the MoDisco facet set catalog ==
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− | Here is an example of using the MoDisco facet API. For more information please refer to the JavaDoc.
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− | import org.eclipse.emf.ecore.EObject;
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− | import org.eclipse.gmt.modisco.infra.query.core.exception.ModelQueryException;
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− | import org.eclipse.gmt.modisco.infra.facet.Facet;
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− | import org.eclipse.gmt.modisco.infra.facet.FacetSet;
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− | import org.eclipse.gmt.modisco.infra.facet.core.FacetSetCatalog;
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− | import org.eclipse.gmt.modisco.infra.facet.core.exception.ModiscoFacetException;
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− |
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− | public class Example {
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− |
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− | public Integer getNbAbstractMethod(EObject eObject)
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− | throws ModelQueryException, ModiscoFacetException {
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− | FacetSet facetSet = FacetSetCatalog.getSingleton().getFacetSet("My");
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− | FacetContext context = new FacetContext();
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− | context.addFacetSet(facetSet);
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− | Facet facet = facetSet.getFacet("AbstractClassDeclaration");
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− | if (context.isInstance(eObject, facet)) {
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− | Object object = context.get(eObject, facet
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− | .getEStructuralFeature("nbAbstractMethod"));
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− | if (object instanceof Integer) {
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− | Integer nbAbstractMethod = (Integer) object;
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− | return nbAbstractMethod;
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− | }
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− | }
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− | return null;
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− | }
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− | }
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− | == How to package a facet set in a plug-in ==
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− | To package a facet set in a plug-in, an extension must be added in the file plugin.xml (contained by the facet set’s project). The extension point to use is: org.eclipse.gmt.modisco.infra.facet.registration.
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− | Here is an example of query set declaration:
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− | <plugin>
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− | <extension
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− | point="org.eclipse.gmt.modisco.infra.facet.registration">
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− | <facetset
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− | file="_example_jdkAndEclipseFacets.facetSet">
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− | </facetset>
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− | </extension>
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− | </plugin>
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− | Thanks to this extension declaration, The MoDisco project is ready to be exported has a plug-in.
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− | == Facet Meta-model Description ==
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− | [[Image:MoDisco_Role_metamodel.png]]
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− | The facet meta-model extends the ecore meta-model and uses the query meta-model.
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− | A FacetSet is a kind of EPackage. A FacetSet contains facets through
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− | the eClassifier reference. A facet is a kind of EClass.
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− | For a facet instance, the eSuperType reference must be set to
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− | specify which class the facet virtually extends.
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− | The facet class has one specific reference: conditionQuery. The
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− | conditionQuery reference points to the ModelQuery class. The model queries
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− | pointed to by the conditionQuery reference must return a Boolean. Those
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− | queries are used to specify how to decide whether an instance conforms to a
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− | facet. If the conditionQuery is empty then all the instances of the class
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− | referred to by the facet instance through the eSuperType reference conform
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− | to this facet.
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− | A facet contains facetAttributes and facetReferences through the
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− | eStructuralFeature reference. The FacetAttribute and FacetReference
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− | classes have a common super class: FacetStructuralFeature. The
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− | FacetStructuralFeature has one reference named valueQuery pointing to
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− | the ModelQuery class. The valueQuery is used to compute the facet
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− | structural feature value. The facetAttribute and facetReference must have
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− | the same type as the query they refer to.
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− | [[Category:MoDisco]]
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