Examples of org.apache.cayenne.map.ObjEntity$DBPathConverter

org.apache.cayenne.map.ObjEntity
ObjEntity is a mapping descriptor for a DataObject Java class. It contains the information about the Java class itself, as well as its mapping to the DbEntity layer.

     * @return the data object for the given class and id
     */
    protected DataObject getObjectForPK(Class dataObjectClass, Object id, boolean refresh) {
        Validate.notNull(dataObjectClass, "Null dataObjectClass parameter.");


        ObjEntity objEntity =
            getDataContext().getEntityResolver().lookupObjEntity(dataObjectClass);


        if (objEntity == null) {
            throw new CayenneRuntimeException("Unmapped DataObject Class: "
                    + dataObjectClass.getName());
        }


        String pkName = getPkName(dataObjectClass);


        ObjectId objectId = new ObjectId(objEntity.getName(), pkName, id);


        int refreshMode = (refresh) ? ObjectIdQuery.CACHE_REFRESH : ObjectIdQuery.CACHE;


        ObjectIdQuery objectIdQuery = new ObjectIdQuery(objectId, false, refreshMode);

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     * @return the primary key column name
     */
    protected String getPkName(Class dataObjectClass) {
        Validate.notNull(dataObjectClass, "Null dataObjectClass parameter.");


        ObjEntity objEntity =
            getDataContext().getEntityResolver().lookupObjEntity(dataObjectClass);


        if (objEntity == null) {
            throw new CayenneRuntimeException("Unmapped DataObject Class: "
                    + dataObjectClass.getName());
        }


        DbEntity dbEntity = objEntity.getDbEntity();
        if (dbEntity == null) {
            throw new CayenneRuntimeException("No DbEntity for ObjEntity: "
                    + objEntity.getName());
        }


        Collection pkAttributes = dbEntity.getPrimaryKeys();
        if (pkAttributes.size() != 1) {
            throw new CayenneRuntimeException("PK contains "

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        Validate.notNull(objectContext, "Null objectContext parameter");
        Validate.notNull(objectContext, "Null dataObjectClass parameter");
        Validate.notNull(objectContext, "Null pk parameter");


        ObjEntity entity =
            objectContext.getEntityResolver().lookupObjEntity(dataObjectClass);


        if (entity == null) {
            String msg = "Non-existent ObjEntity for class: " + dataObjectClass;
            throw new RuntimeException(msg);
        }


        DbEntity dbEntity = entity.getDbEntity();
        if (dbEntity == null) {
            String msg = "No DbEntity for ObjEntity: " + entity.getName();
            throw new RuntimeException(msg);
        }


        List pkAttributes = dbEntity.getPrimaryKey();
        if (pkAttributes.size() != 1) {
            String msg = "PK contains " + pkAttributes.size()
                + " columns, expected 1.";
            throw new RuntimeException(msg);
        }


        DbAttribute attr = (DbAttribute) pkAttributes.get(0);


        return new ObjectId(entity.getName(), attr.getName(), pk);
    }

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    public static Class getPkClass(ObjectContext objectContext, Class dataObjectClass) {


        Validate.notNull(objectContext, "Null objectContext parameter.");
        Validate.notNull(dataObjectClass, "Null dataObjectClass parameter.");


        ObjEntity objEntity =
            objectContext.getEntityResolver().lookupObjEntity(dataObjectClass);


        if (objEntity == null) {
            throw new CayenneRuntimeException("Unmapped DataObject Class: "
                    + dataObjectClass.getName());
        }


        DbEntity dbEntity = objEntity.getDbEntity();
        if (dbEntity == null) {
            throw new CayenneRuntimeException("No DbEntity for ObjEntity: "
                    + objEntity.getName());
        }


        List pkAttributes = dbEntity.getPrimaryKey();
        if (pkAttributes.size() != 1) {
            throw new CayenneRuntimeException("PK contains "

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    public static String getPkName(ObjectContext objectContext, Class dataObjectClass) {


        Validate.notNull(objectContext, "Null objectContext parameter.");
        Validate.notNull(dataObjectClass, "Null dataObjectClass parameter.");


        ObjEntity objEntity =
            objectContext.getEntityResolver().lookupObjEntity(dataObjectClass);


        if (objEntity == null) {
            throw new CayenneRuntimeException("Unmapped DataObject Class: "
                    + dataObjectClass.getName());
        }


        DbEntity dbEntity = objEntity.getDbEntity();
        if (dbEntity == null) {
            throw new CayenneRuntimeException("No DbEntity for ObjEntity: "
                    + objEntity.getName());
        }


        List pkAttributes = dbEntity.getPrimaryKey();
        if (pkAttributes.size() != 1) {
            throw new CayenneRuntimeException("PK contains "

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        assertEquals(20, objects.size());
    }


    public void testSelectAllObjectsRootObjEntity() throws Exception {
        createArtistsDataSet();
        ObjEntity artistEntity = context
                .getEntityResolver()
                .lookupObjEntity(Artist.class);
        SelectQuery query = new SelectQuery(artistEntity);


        List objects = context.performQuery(query);

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     * prefetch scenario with no reverse obj relationships.
     */
    public void testRouteQueryWithPrefetchesNoReverse() {


        EntityResolver resolver = context.getEntityResolver();
        ObjEntity paintingEntity = resolver.lookupObjEntity(Painting.class);
        ObjEntity galleryEntity = resolver.lookupObjEntity(Gallery.class);
        ObjEntity artistExhibitEntity = resolver.lookupObjEntity(ArtistExhibit.class);
        ObjEntity exhibitEntity = resolver.lookupObjEntity(Exhibit.class);
        ObjRelationship paintingToArtistRel = (ObjRelationship) paintingEntity
                .getRelationship("toArtist");
        paintingEntity.removeRelationship("toArtist");


        ObjRelationship galleryToPaintingRel = (ObjRelationship) galleryEntity
                .getRelationship("paintingArray");
        galleryEntity.removeRelationship("paintingArray");


        ObjRelationship artistExhibitToArtistRel = (ObjRelationship) artistExhibitEntity
                .getRelationship("toArtist");
        artistExhibitEntity.removeRelationship("toArtist");


        ObjRelationship exhibitToArtistExhibitRel = (ObjRelationship) exhibitEntity
                .getRelationship("artistExhibitArray");
        exhibitEntity.removeRelationship("artistExhibitArray");


        Expression e = ExpressionFactory.matchExp("artistName", "artist1");
        SelectQuery q = new SelectQuery("Artist", e);
        q.addPrefetch("paintingArray");
        q.addPrefetch("paintingArray.toGallery");
        q.addPrefetch("artistExhibitArray.toExhibit");


        try {
            MockQueryRouter router = new MockQueryRouter();
            q.route(router, resolver, null);
            assertEquals(4, router.getQueryCount());
        }
        finally {
            paintingEntity.addRelationship(paintingToArtistRel);
            galleryEntity.addRelationship(galleryToPaintingRel);
            artistExhibitEntity.addRelationship(artistExhibitToArtistRel);
            exhibitEntity.addRelationship(exhibitToArtistExhibitRel);
        }
    }

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                && object.getObjectContext() != null) {


            return getObjectStore().getSnapshot(object.getObjectId());
        }


        ObjEntity entity = getEntityResolver().lookupObjEntity(object);
        final ClassDescriptor descriptor = getEntityResolver().getClassDescriptor(
                entity.getName());
        final DataRow snapshot = new DataRow(10);


        descriptor.visitProperties(new PropertyVisitor() {


            public boolean visitAttribute(AttributeProperty property) {

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     * @since 3.1
     */
    public <T extends DataObject> T objectFromDataRow(
            Class<T> objectClass,
            DataRow dataRow) {
        ObjEntity entity = this.getEntityResolver().lookupObjEntity(objectClass);


        if (entity == null) {
            throw new CayenneRuntimeException("Unmapped Java class: " + objectClass);
        }


        ClassDescriptor descriptor = getEntityResolver().getClassDescriptor(
                entity.getName());
        List<T> list = objectsFromDataRows(descriptor, Collections.singletonList(dataRow));
        return list.get(0);
    }

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    public <T> T newObject(Class<T> persistentClass) {
        if (persistentClass == null) {
            throw new NullPointerException("Null 'persistentClass'");
        }


        ObjEntity entity = getEntityResolver().lookupObjEntity(persistentClass);
        if (entity == null) {
            throw new IllegalArgumentException("Class is not mapped with Cayenne: "
                    + persistentClass.getName());
        }


        return (T) newObject(entity.getName());
    }

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