Attachment 249858 Details for Bug 452681 – Simple Junit test that focus on the problem of crossReference broke after a reloading

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Simple Junit test that focus on the problem of crossReference broke after a reloading

EMFReloadWithCrossReferenceTests.java (text/x-java), 11.90 KB, created by Laurent Redor

on 2015-01-12 05:40:29 EST

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Creator: Laurent Redor

Created: 2015-01-12 05:40:29 EST

Size: 11.90 KB

patch

obsolete

>/*******************************************************************************
> * Copyright (c) 2015 THALES GLOBAL SERVICES.
> * All rights reserved. This program and the accompanying materials
> * are made available under the terms of the Eclipse Public License v1.0
> * which accompanies this distribution, and is available at
> * http://www.eclipse.org/legal/epl-v10.html
> *
> * Contributors:
> *    Obeo - initial API and implementation
> *******************************************************************************/
>package org.eclipse.sirius.tests.unit.common;
>
>import java.io.File;
>import java.io.IOException;
>import java.util.ArrayList;
>import java.util.Collection;
>import java.util.Iterator;
>import java.util.List;
>
>import junit.framework.TestCase;
>
>import org.eclipse.emf.common.util.URI;
>import org.eclipse.emf.ecore.EClass;
>import org.eclipse.emf.ecore.EObject;
>import org.eclipse.emf.ecore.EPackage;
>import org.eclipse.emf.ecore.EReference;
>import org.eclipse.emf.ecore.EStructuralFeature;
>import org.eclipse.emf.ecore.EcoreFactory;
>import org.eclipse.emf.ecore.EcorePackage;
>import org.eclipse.emf.ecore.resource.Resource;
>import org.eclipse.emf.ecore.resource.ResourceSet;
>import org.eclipse.emf.ecore.resource.impl.ResourceSetImpl;
>import org.eclipse.emf.ecore.util.ECrossReferenceAdapter;
>import org.eclipse.emf.transaction.RecordingCommand;
>import org.eclipse.emf.transaction.TransactionalEditingDomain;
>import org.eclipse.emf.transaction.impl.TransactionalEditingDomainImpl.FactoryImpl;
>
>/**
> * Class containing some tests to reveal the "problem" with EMF CrossReferencer
> * after a unload/reload.
> * 
> * A.ecore has a classA with a reference to the ClassB of B.ecore. The
> * cross-referencer allows to retrieve the reference from B to A. If we reload
> * B, the cross-referencer does not work.
> * 
> * @author <a href="mailto:laurent.redor@obeo.fr">Laurent Redor</a>
> */
>public class EMFReloadWithCrossReferenceTests extends TestCase {
>
>    private TransactionalEditingDomain editingDomain;
>
>    private class SpecificECrossReferenceAdapter extends ECrossReferenceAdapter {
>        public void resolveProxyCrossReference(Resource resource) {
>            if (resource != null) {
>                final Iterator<EObject> it = resource.getAllContents();
>                while (it.hasNext()) {
>                    resolveAll(it.next());
>                }
>            }
>        }
>    }
>
>    private class SpecificECrossReferenceAdapter2 extends ECrossReferenceAdapter {
>        private class SpecificInverseCrossReferencer extends InverseCrossReferencer {
>            private static final long serialVersionUID = 1L;
>
>            @Override
>            protected List<EObject> removeProxies(URI uri) {
>                return super.removeProxies(uri);
>            }
>        }
>
>        public SpecificECrossReferenceAdapter2() {
>            inverseCrossReferencer = new SpecificInverseCrossReferencer();
>        }
>
>        /**
>         * A part of {@link #resolveAll(EObject)} has been duplicated to avoid
>         * the time consumption of accessing to resourceURI for each objects of
>         * the same resource.
>         * 
>         * @param resource
>         *            Each cross reference pointing to a proxy of this
>         *            <code>resource</code> will be resolved.
>         */
>        public void resolveProxyCrossReference(Resource resource) {
>            if (resource != null) {
>                URI resourceURI = resource.getURI();
>                if (resourceURI != null) {
>                    ResourceSet resourceSet = resource.getResourceSet();
>                    if (resourceSet != null) {
>                        resourceURI = resourceSet.getURIConverter().normalize(resourceURI);
>                    }
>                }
>                final Iterator<EObject> it = resource.getAllContents();
>                while (it.hasNext()) {
>                    EObject eObject = it.next();
>                    URI eObjectURI;
>                    if (resourceURI != null) {
>                        eObjectURI = resourceURI.appendFragment(resource.getURIFragment(eObject));
>                    } else {
>                        eObjectURI = URI.createHierarchicalURI(null, null, resource.getURIFragment(eObject));
>                    }
>                    List<EObject> proxies = ((SpecificInverseCrossReferencer) inverseCrossReferencer).removeProxies(eObjectURI);
>                    if (proxies != null) {
>                        for (int i = 0, size = proxies.size(); i < size; ++i) {
>                            EObject proxy = proxies.get(i);
>                            for (EStructuralFeature.Setting setting : getInverseReferences(proxy, false)) {
>                                resolveProxy(resource, eObject, proxy, setting);
>                            }
>                        }
>                    }
>                }
>            }
>        }
>    }
>
>    /**
>     * Without cross reference resolution, we have 0 cross reference after
>     * unload/reload.
>     */
>    public void testCrossReferencerAfterReloadingWithoutCrossReferenceResolution() {
>        /* Create a standard cross referencer */
>        ECrossReferenceAdapter crossRefencer = new ECrossReferenceAdapter();
>        Resource reloadedResourceB = init(crossRefencer);
>        EClass reloadedEClassB = (EClass) ((EPackage) reloadedResourceB.getContents().get(0)).getEClassifier("ClassB");
>        assertEquals("We should have 0 cross reference after unload/reload without cross reference resolution.", 0, getReferencesTo(reloadedEClassB, crossRefencer, false).size());
>    }
>
>    /**
>     * With cross reference resolution, we have 1 cross reference after
>     * unload/reload, as expected. But always having the cross reference
>     * resolution enabled can be time consuming.
>     */
>    public void testCrossReferencerAfterReloadingWithCrossReferenceResolution() {
>        /* Create a standard cross referencer */
>        ECrossReferenceAdapter crossRefencer = new ECrossReferenceAdapter();
>        Resource reloadedResourceB = init(crossRefencer);
>        EClass reloadedEClassB = (EClass) ((EPackage) reloadedResourceB.getContents().get(0)).getEClassifier("ClassB");
>        assertEquals("We should have one cross reference after unload/reload with cross reference resolution.", 1, getReferencesTo(reloadedEClassB, crossRefencer, true).size());
>    }
>
>    /**
>     * This test use a first specific implementation of cross referencer that
>     * allows to resolve all proxy cross reference to a specific resource by
>     * calling @ {@link ECrossReferenceAdapter#resolveAll}.
>     */
>    public void testCrossReferencerAfterReloadingWithoutCrossReferenceResolutionButWithSpecificCrossReferencer() {
>        /* Create a specific cross referencer */
>        SpecificECrossReferenceAdapter specificCrossRefencer = new SpecificECrossReferenceAdapter();
>        Resource reloadedResourceB = init(specificCrossRefencer);
>        specificCrossRefencer.resolveProxyCrossReference(reloadedResourceB);
>        EClass reloadedEClassB = (EClass) ((EPackage) reloadedResourceB.getContents().get(0)).getEClassifier("ClassB");
>        assertEquals("We should have one cross reference after unload/reload with cross reference resolution.", 1, getReferencesTo(reloadedEClassB, specificCrossRefencer, false).size());
>    }
>
>    /**
>     * This test use a second specific implementation of cross referencer that
>     * allows to resolve all proxy cross reference to a specific resource. This
>     * implementation uses an adaptation of
>     * {@link ECrossReferenceAdapter#resolveAll} to avoid the time consumption
>     * of accessing to resourceURI for each objects of the same resource.
>     */
>    public void testCrossReferencerAfterReloadingWithoutCrossReferenceResolutionButWithSpecificCrossReferencer2() {
>        /* Create a specific cross referencer */
>        SpecificECrossReferenceAdapter2 specificCrossRefencer = new SpecificECrossReferenceAdapter2();
>        Resource reloadedResourceB = init(specificCrossRefencer);
>        specificCrossRefencer.resolveProxyCrossReference(reloadedResourceB);
>        EClass reloadedEClassB = (EClass) ((EPackage) reloadedResourceB.getContents().get(0)).getEClassifier("ClassB");
>        assertEquals("We should have one cross reference after unload/reload with cross reference resolution.", 1, getReferencesTo(reloadedEClassB, specificCrossRefencer, false).size());
>    }
>
>    protected Resource init(ECrossReferenceAdapter crossRefencer) {
>        /* create a resource set and add the crossRefencer on it. */
>        ResourceSet rset = new ResourceSetImpl();
>        rset.eAdapters().add(crossRefencer);
>        /* create an editing domain */
>        editingDomain = FactoryImpl.INSTANCE.createEditingDomain(rset);
>
>        /* Initialize the model B */
>        final EPackage ePackageB = EcoreFactory.eINSTANCE.createEPackage();
>        ePackageB.setName("RootB");
>        final EClass eClassB = EcoreFactory.eINSTANCE.createEClass();
>        eClassB.setName("ClassB");
>        ePackageB.getEClassifiers().add(eClassB);
>
>        /* create resource and and add it initialized model */
>        final URI fileBUri = URI.createFileURI(new File("B.ecore").getAbsolutePath());
>        final Resource rsB = rset.createResource(fileBUri);
>        editingDomain.getCommandStack().execute(new RecordingCommand(editingDomain) {
>
>            @Override
>            protected void doExecute() {
>                rsB.getContents().add(ePackageB);
>            }
>
>        });
>        try {
>            rsB.save(null);
>        } catch (IOException e) {
>            e.printStackTrace();
>        }
>
>        /* initialize the model A */
>        final EPackage ePackageA = EcoreFactory.eINSTANCE.createEPackage();
>        ePackageA.setName("RootA");
>        final EClass eClassA = EcoreFactory.eINSTANCE.createEClass();
>        eClassA.setName("ClassA");
>        final EReference refToB = EcoreFactory.eINSTANCE.createEReference();
>        refToB.setName("refToB");
>        refToB.setEType(eClassB);
>        eClassA.getEStructuralFeatures().add(refToB);
>        ePackageA.getEClassifiers().add(eClassA);
>
>        /* create resource and and add it initialized model */
>        final URI fileAUri = URI.createFileURI(new File("A.ecore").getAbsolutePath());
>        final Resource rsA = rset.createResource(fileAUri);
>        editingDomain.getCommandStack().execute(new RecordingCommand(editingDomain) {
>
>            @Override
>            protected void doExecute() {
>                rsA.getContents().add(ePackageA);
>            }
>
>        });
>        try {
>            rsA.save(null);
>        } catch (IOException e) {
>            e.printStackTrace();
>        }
>        assertEquals("We should have one cross reference before unload/reload.", 1, getReferencesTo(eClassB, crossRefencer, false).size());
>        // Unload and reload the resource B
>        try {
>            rsB.unload();
>            rsB.load(null);
>            return rsB;
>        } catch (IOException e) {
>            fail("Unload/reload of resource b failed: " + e.getMessage());
>        }
>        return null;
>    }
>
>    /**
>     * Get the {@link EReference eReferences} that have <code>type</code> as
>     * EType.
>     * 
>     * @param type
>     *            The searched EType
>     * @param crossReferencer
>     *            The cross referencer to use.
>     * @param resolve
>     *            Resolve proxy crossReference to this <code>type</code>
>     * 
>     * @return The list of {@link EReference eReferences} that have
>     *         <code>type</code> as EType.
>     */
>    public Collection<EReference> getReferencesTo(EClass type, ECrossReferenceAdapter crossReferencer, boolean resolve) {
>        Collection<EReference> crossReferenceResult = new ArrayList<EReference>();
>        for (EStructuralFeature.Setting setting : crossReferencer.getInverseReferences(type, resolve)) {
>            if (EcorePackage.Literals.EREFERENCE.isInstance(setting.getEObject()) && setting.getEStructuralFeature() == EcorePackage.Literals.ETYPED_ELEMENT__ETYPE) {
>                crossReferenceResult.add((EReference) setting.getEObject());
>            }
>        }
>        return crossReferenceResult;
>    }
>}

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Attachments on bug 452681: 248829 | 249825 | 249857 | 249858 | 250088