Examples with PaginatedCriteriaBuilder com.blazebit.persistence.PaginatedCriteriaBuilder used on opensource projects

Example 1 with PaginatedCriteriaBuilder

use of com.blazebit.persistence.PaginatedCriteriaBuilder in project blaze-persistence by Blazebit.

the class AbstractEntityViewAwareRepository method getQuery.

protected <S extends E> TypedQuery<V> getQuery(Specification<S> spec, Class<S> domainClass, Pageable pageable, Sort sort) {
    BlazeCriteriaQuery<S> cq = BlazeCriteria.get(cbf, domainClass);
    Root<S> root = this.applySpecificationToCriteria(spec, domainClass, cq);
    Class<V> entityViewClass = metadata == null || metadata.getEntityViewClass() == null ? this.entityViewClass : (Class<V>) metadata.getEntityViewClass();
    if (sort != null && entityViewClass == null) {
        cq.orderBy(QueryUtils.toOrders(sort, root, BlazeCriteria.get(cbf)));
    }
    CriteriaBuilder<S> cb = cq.createCriteriaBuilder(entityManager);
    String[] fetches = EMPTY;
    if (metadata != null && metadata.getEntityGraph() != null && (fetches = metadata.getEntityGraph().attributePaths()).length != 0) {
        cb.fetch(fetches);
    }
    boolean withCountQuery = true;
    boolean withKeysetExtraction = false;
    boolean withExtractAllKeysets = false;
    TypedQuery<V> query;
    if (entityViewClass == null) {
        if (pageable == null) {
            query = (TypedQuery<V>) cb.getQuery();
        } else {
            PaginatedCriteriaBuilder<S> paginatedCriteriaBuilder;
            if (pageable instanceof KeysetPageable) {
                KeysetPageable keysetPageable = (KeysetPageable) pageable;
                paginatedCriteriaBuilder = cb.page(keysetPageable.getKeysetPage(), getOffset(pageable), pageable.getPageSize());
                withCountQuery = keysetPageable.isWithCountQuery();
                withKeysetExtraction = true;
                withExtractAllKeysets = keysetPageable.isWithExtractAllKeysets();
            } else {
                paginatedCriteriaBuilder = cb.page(getOffset(pageable), pageable.getPageSize());
            }
            if (withKeysetExtraction) {
                paginatedCriteriaBuilder.withKeysetExtraction(true);
                paginatedCriteriaBuilder.withExtractAllKeysets(withExtractAllKeysets);
            }
            paginatedCriteriaBuilder.withCountQuery(withCountQuery);
            query = (TypedQuery<V>) paginatedCriteriaBuilder.getQuery();
        }
    } else {
        if (pageable == null) {
            EntityViewSetting<V, CriteriaBuilder<V>> setting = EntityViewSetting.create(entityViewClass);
            CriteriaBuilder<V> fqb = evm.applySetting(setting, cb);
            if (sort != null) {
                EntityViewSortUtil.applySort(evm, entityViewClass, fqb, sort);
            }
            query = fqb.getQuery();
        } else {
            EntityViewSetting<V, PaginatedCriteriaBuilder<V>> setting = EntityViewSetting.create(entityViewClass, getOffset(pageable), pageable.getPageSize());
            if (pageable instanceof KeysetPageable) {
                KeysetPageable keysetPageable = (KeysetPageable) pageable;
                setting.withKeysetPage(keysetPageable.getKeysetPage());
                withCountQuery = keysetPageable.isWithCountQuery();
                withKeysetExtraction = true;
                withExtractAllKeysets = keysetPageable.isWithExtractAllKeysets();
            }
            PaginatedCriteriaBuilder<V> paginatedCriteriaBuilder = evm.applySetting(setting, cb);
            if (withKeysetExtraction) {
                paginatedCriteriaBuilder.withKeysetExtraction(true);
                paginatedCriteriaBuilder.withExtractAllKeysets(withExtractAllKeysets);
            }
            paginatedCriteriaBuilder.withCountQuery(withCountQuery);
            if (sort != null || (sort = pageable.getSort()) != null) {
                EntityViewSortUtil.applySort(evm, entityViewClass, paginatedCriteriaBuilder, sort);
            }
            query = paginatedCriteriaBuilder.getQuery();
        }
    }
    return this.applyRepositoryMethodMetadata(query, fetches.length == 0);
}

Example 2 with PaginatedCriteriaBuilder

use of com.blazebit.persistence.PaginatedCriteriaBuilder in project blaze-persistence by Blazebit.

the class CTEShowcase method run.

@Override
public void run() {
    testDataGenerator.generateTestData();
    EntityViewSetting<BasicCatView, CriteriaBuilder<BasicCatView>> basicCatSetting = EntityViewSetting.create(BasicCatView.class);
    BasicCatView someCat = catDataAccess.getCatByName("G - Generation 2 - Cat 2/1", basicCatSetting);
    // entity-view example with CTE
    System.out.println(heading("Family tree of " + someCat));
    print(catDataAccess.getCatHierarchy(someCat.getId(), basicCatSetting));
    // pagination & entity views
    EntityViewSetting<BasicCatView, PaginatedCriteriaBuilder<BasicCatView>> paginationSetting = EntityViewSetting.create(BasicCatView.class, 0, 3);
    PagedList<BasicCatView> pagedResults = catDataAccess.getPaginatedCats(paginationSetting);
    System.out.println(heading("Page 1"));
    print(pagedResults);
    // insert new cat
    // in the sort order defined by CatDataAccess#getPaginatedCats, this cat is inserted at index 1 (0-based)
    testDataGenerator.addCat("B - New cat");
    // since we use keyset pagination, the inserted cat does not influence the next page
    // depending on the firstRow parameter and the passed keyset page, the criteria builder will automatically decide
    // if it can use keyset pagination or if it must perform offset pagination
    paginationSetting = EntityViewSetting.create(BasicCatView.class, 3, 3);
    paginationSetting.withKeysetPage(pagedResults.getKeysetPage());
    pagedResults = catDataAccess.getPaginatedCats(paginationSetting);
    System.out.println(heading("Page 2"));
    print(pagedResults);
    // scroll back to page 1
    // page 1 will now contain the new cat
    paginationSetting = EntityViewSetting.create(BasicCatView.class, 0, 3);
    paginationSetting.withKeysetPage(pagedResults.getKeysetPage());
    pagedResults = catDataAccess.getPaginatedCats(paginationSetting);
    System.out.println(heading("Back at Page 1"));
    print(pagedResults);
}

Example 3 with PaginatedCriteriaBuilder

use of com.blazebit.persistence.PaginatedCriteriaBuilder in project blaze-persistence by Blazebit.

the class SubviewEntityViewSettingTest method testEntityViewSettingFilterFilteredSubview.

@Test
@Category({ NoEclipselink.class })
public // Eclipselink does not support VALUE() dereferencing
void testEntityViewSettingFilterFilteredSubview() {
    EntityViewManager evm = build(DocumentMasterView.class, SimpleDocumentView.class, PersonSubView.class, PersonSubViewFiltered.class);
    // Base setting
    EntityViewSetting<DocumentMasterView, PaginatedCriteriaBuilder<DocumentMasterView>> setting = EntityViewSetting.create(DocumentMasterView.class, 0, 1);
    // Query
    CriteriaBuilder<Document> cb = cbf.create(em, Document.class);
    setting.addAttributeFilter("myContactPerson.name", "Owner");
    setting.addAttributeSorter("myContactPerson.name", Sorters.descending());
    setting.addAttributeSorter("id", Sorters.descending());
    setting.addOptionalParameter("contactPersonNumber", 1);
    PaginatedCriteriaBuilder<DocumentMasterView> paginatedCb = evm.applySetting(setting, cb);
    PagedList<DocumentMasterView> result = paginatedCb.getResultList();
    assertEquals(1, result.size());
    assertEquals(2, result.getTotalSize());
    assertEquals("HisTest", result.get(0).getName());
    assertEquals("DocumentOwnerSlave".toUpperCase(), result.get(0).getOwner().getName());
}

Example 4 with PaginatedCriteriaBuilder

use of com.blazebit.persistence.PaginatedCriteriaBuilder in project blaze-persistence by Blazebit.

the class MappingSubqueryTest method testSubqueryWithExpression.

@Test
@Category(NoDB2.class)
public void testSubqueryWithExpression() {
    EntityViewManager evm = build(DocumentWithExpressionSubqueryView.class);
    // Base setting
    EntityViewSetting<DocumentWithExpressionSubqueryView, PaginatedCriteriaBuilder<DocumentWithExpressionSubqueryView>> setting = EntityViewSetting.create(DocumentWithExpressionSubqueryView.class, 0, 2);
    // Query
    CriteriaBuilder<Document> cb = cbf.create(em, Document.class);
    setting.addAttributeSorter("contactCount", Sorters.descending());
    setting.addAttributeSorter("id", Sorters.descending());
    PaginatedCriteriaBuilder<DocumentWithExpressionSubqueryView> paginatedCb = evm.applySetting(setting, cb);
    // TODO: Since case when statements in order bys use the resolved expression and because hibernate does not resolve
    // the select alias in nested expressions, we can't run this on DB2
    // The fix is to use the select alias
    PagedList<DocumentWithExpressionSubqueryView> result = paginatedCb.getResultList();
    assertEquals(2, result.size());
    assertEquals(2, result.getTotalSize());
    assertEquals(doc2.getName(), result.get(0).getName());
    assertEquals(Long.valueOf(22), result.get(0).getContactCount());
    assertEquals(doc1.getName(), result.get(1).getName());
    assertEquals(Long.valueOf(11), result.get(1).getContactCount());
}

Example 5 with PaginatedCriteriaBuilder

use of com.blazebit.persistence.PaginatedCriteriaBuilder in project blaze-persistence by Blazebit.

the class AbstractCorrelatedSubselectTupleTransformer method prepare.

private void prepare() {
    JpaProvider jpaProvider = entityViewConfiguration.getCriteriaBuilder().getService(JpaProvider.class);
    FullQueryBuilder<?, ?> queryBuilder = entityViewConfiguration.getCriteriaBuilder();
    Map<String, Object> optionalParameters = entityViewConfiguration.getOptionalParameters();
    Class<?> correlationBasisEntityType = correlationBasisEntity;
    String viewRootExpression = viewRootAlias;
    EmbeddingViewJpqlMacro embeddingViewJpqlMacro = entityViewConfiguration.getEmbeddingViewJpqlMacro();
    ViewJpqlMacro viewJpqlMacro = entityViewConfiguration.getViewJpqlMacro();
    if (queryBuilder instanceof PaginatedCriteriaBuilder<?>) {
        criteriaBuilder = queryBuilder.copyCriteriaBuilder(Object[].class, false);
    } else {
        LimitBuilder<?> limitBuilder = (LimitBuilder<?>) queryBuilder;
        // To set the limit, we need the JPA provider to support this
        if (jpaProvider.supportsSubqueryInFunction() && (limitBuilder.getFirstResult() > 0 || limitBuilder.getMaxResults() < Integer.MAX_VALUE)) {
            // we must turn this query builder into a paginated criteria builder first
            try {
                criteriaBuilder = queryBuilder.copyCriteriaBuilder(Object[].class, true).page(limitBuilder.getFirstResult(), limitBuilder.getMaxResults()).copyCriteriaBuilder(Object[].class, false);
            } catch (IllegalStateException ex) {
                LOG.log(Level.WARNING, "Could not create a paginated criteria builder for SUBSELECT fetching which might lead to bad performance", ex);
                criteriaBuilder = queryBuilder.copyCriteriaBuilder(Object[].class, false);
            }
        } else {
            // Regular query without limit/offset
            criteriaBuilder = queryBuilder.copyCriteriaBuilder(Object[].class, false);
        }
    }
    int originalFirstResult = 0;
    int originalMaxResults = Integer.MAX_VALUE;
    // A copied query that is extended with further joins can't possibly use the limits provided by the outer query
    ((LimitBuilder<?>) criteriaBuilder).setFirstResult(originalFirstResult);
    ((LimitBuilder<?>) criteriaBuilder).setMaxResults(originalMaxResults);
    this.viewRootJpqlMacro = new CorrelatedSubqueryViewRootJpqlMacro(criteriaBuilder, optionalParameters, false, viewRootEntityClass, idAttributePath, viewRootExpression);
    criteriaBuilder.registerMacro("view", viewJpqlMacro);
    criteriaBuilder.registerMacro("view_root", viewRootJpqlMacro);
    criteriaBuilder.registerMacro("embedding_view", embeddingViewJpqlMacro);
    String oldViewPath = viewJpqlMacro.getViewPath();
    String oldEmbeddingViewPath = embeddingViewJpqlMacro.getEmbeddingViewPath();
    viewJpqlMacro.setViewPath(correlationResultExpression);
    embeddingViewJpqlMacro.setEmbeddingViewPath(embeddingViewPath);
    String joinBase = embeddingViewPath;
    SubqueryCorrelationBuilder correlationBuilder = new SubqueryCorrelationBuilder(queryBuilder, optionalParameters, criteriaBuilder, correlationAlias, correlationExternalAlias, correlationResultExpression, correlationBasisType, correlationBasisEntityType, joinBase, attributePath, 1, limiter, true);
    CorrelationProvider provider = correlationProviderFactory.create(entityViewConfiguration.getCriteriaBuilder(), entityViewConfiguration.getOptionalParameters());
    provider.applyCorrelation(correlationBuilder, correlationBasisExpression);
    if (criteriaBuilder instanceof LimitBuilder<?>) {
        if (originalFirstResult != ((LimitBuilder<?>) criteriaBuilder).getFirstResult() || originalMaxResults != ((LimitBuilder<?>) criteriaBuilder).getMaxResults()) {
            throw new IllegalArgumentException("Correlation provider '" + provider + "' wrongly uses setFirstResult() or setMaxResults() on the query builder which might lead to wrong results. Use SELECT fetching with batch size 1 or reformulate the correlation provider to use the limit/offset in a subquery!");
        }
    }
    if (fetches.length != 0) {
        for (int i = 0; i < fetches.length; i++) {
            criteriaBuilder.fetch(fetches[i]);
        }
    }
    if (indexFetches.length != 0) {
        for (int i = 0; i < indexFetches.length; i++) {
            criteriaBuilder.fetch(indexFetches[i]);
        }
    }
    // Before we can determine whether we use view roots or embedding views, we need to add all selects, otherwise macros might report false although they are used
    final String correlationRoot = correlationBuilder.getCorrelationRoot();
    final int tupleSuffix = maximumViewMapperCount + 1 + (indexCorrelator == null && indexExpression == null ? 0 : 1);
    ObjectBuilder<Object[]> objectBuilder = (ObjectBuilder<Object[]>) correlator.finish(criteriaBuilder, entityViewConfiguration, 0, tupleSuffix, correlationRoot, embeddingViewJpqlMacro, true);
    final boolean usesViewRoot = viewRootJpqlMacro.usesViewMacro();
    final boolean usesEmbeddingView = embeddingViewJpqlMacro.usesEmbeddingView();
    if (usesEmbeddingView && !(embeddingViewType instanceof ViewType<?>)) {
        throw new IllegalStateException("The use of EMBEDDING_VIEW in the correlation for '" + embeddingViewType.getJavaType().getName() + "." + attributePath.substring(attributePath.lastIndexOf('.') + 1) + "' is illegal because the embedding view type '" + embeddingViewType.getJavaType().getName() + "' does not declare a @IdMapping!");
    } else if (usesViewRoot && !(viewRootType instanceof ViewType<?>)) {
        throw new IllegalStateException("The use of VIEW_ROOT in the correlation for '" + embeddingViewType.getJavaType().getName() + "." + attributePath.substring(attributePath.lastIndexOf('.') + 1) + "' is illegal because the view root type '" + viewRootType.getJavaType().getName() + "' does not declare a @IdMapping!");
    }
    final int maximumSlotsFilled;
    final int elementKeyIndex;
    final int elementViewIndex;
    if (usesEmbeddingView) {
        maximumSlotsFilled = embeddingViewIdMapperCount == 0 ? 1 : embeddingViewIdMapperCount;
        elementKeyIndex = (maximumViewMapperCount - maximumSlotsFilled) + 2 + valueIndex;
        elementViewIndex = (maximumViewMapperCount - maximumSlotsFilled) + 1 + valueIndex;
        viewIndex = embeddingViewIndex;
    } else if (usesViewRoot) {
        maximumSlotsFilled = viewRootIdMapperCount == 0 ? 1 : viewRootIdMapperCount;
        elementKeyIndex = (maximumViewMapperCount - maximumSlotsFilled) + 2 + valueIndex;
        elementViewIndex = (maximumViewMapperCount - maximumSlotsFilled) + 1 + valueIndex;
        viewIndex = viewRootIndex;
    } else {
        maximumSlotsFilled = 0;
        elementKeyIndex = maximumViewMapperCount + 1 + valueIndex;
        elementViewIndex = 1 + valueIndex;
        viewIndex = -1;
    }
    for (int i = maximumSlotsFilled; i < maximumViewMapperCount; i++) {
        criteriaBuilder.select("NULL");
    }
    ExpressionFactory ef = criteriaBuilder.getService(ExpressionFactory.class);
    if (usesEmbeddingView) {
        EntityViewConfiguration configuration = new EntityViewConfiguration(criteriaBuilder, ef, new MutableViewJpqlMacro(), new MutableEmbeddingViewJpqlMacro(), Collections.<String, Object>emptyMap(), Collections.<String, Object>emptyMap(), entityViewConfiguration.getFetches(), attributePath);
        ObjectBuilder<Object[]> embeddingViewObjectBuilder = createViewAwareObjectBuilder(criteriaBuilder, embeddingViewType, configuration, embeddingViewIdExpression);
        if (embeddingViewObjectBuilder == null) {
            criteriaBuilder.select(embeddingViewIdExpression);
        } else {
            criteriaBuilder.selectNew(objectBuilder = new LateAdditionalObjectBuilder(objectBuilder, embeddingViewObjectBuilder, true));
        }
    } else if (usesViewRoot) {
        EntityViewConfiguration configuration = new EntityViewConfiguration(criteriaBuilder, ef, new MutableViewJpqlMacro(), new MutableEmbeddingViewJpqlMacro(), Collections.<String, Object>emptyMap(), Collections.<String, Object>emptyMap(), entityViewConfiguration.getFetches(), attributePath);
        ObjectBuilder<Object[]> viewRootObjectBuilder = createViewAwareObjectBuilder(criteriaBuilder, viewRootType, configuration, viewRootIdExpression);
        if (viewRootObjectBuilder == null) {
            criteriaBuilder.select(viewRootIdExpression);
        } else {
            criteriaBuilder.selectNew(objectBuilder = new LateAdditionalObjectBuilder(objectBuilder, viewRootObjectBuilder, true));
        }
    }
    criteriaBuilder.select(correlationKeyExpression);
    if (indexCorrelator != null) {
        ObjectBuilder<?> indexBuilder = indexCorrelator.finish(criteriaBuilder, entityViewConfiguration, maximumViewMapperCount + 2, 0, indexExpression, embeddingViewJpqlMacro, true);
        if (indexBuilder != null) {
            criteriaBuilder.selectNew(new LateAdditionalObjectBuilder(objectBuilder, indexBuilder, false));
        }
    }
    populateParameters(entityViewConfiguration, criteriaBuilder);
    viewJpqlMacro.setViewPath(oldViewPath);
    embeddingViewJpqlMacro.setEmbeddingViewPath(oldEmbeddingViewPath);
    List<Object[]> resultList = (List<Object[]>) criteriaBuilder.getResultList();
    Map<Object, Map<Object, Object>> collections = new HashMap<>(resultList.size());
    for (int i = 0; i < resultList.size(); i++) {
        Object[] element = resultList.get(i);
        Map<Object, Object> viewRootResult = collections.get(element[elementViewIndex]);
        if (viewRootResult == null) {
            viewRootResult = new HashMap<>();
            collections.put(element[elementViewIndex], viewRootResult);
        }
        if (this.containerAccumulator == null) {
            viewRootResult.put(element[elementKeyIndex], element[valueIndex]);
        } else {
            Object result = viewRootResult.get(element[elementKeyIndex]);
            if (result == null) {
                result = createDefaultResult();
                viewRootResult.put(element[elementKeyIndex], result);
            }
            Object indexObject = null;
            if (indexCorrelator != null || indexExpression != null) {
                indexObject = element[elementKeyIndex + 1];
            }
            this.containerAccumulator.add(result, indexObject, element[valueIndex], isRecording());
        }
    }
    this.collections = collections;
}