use of com.blazebit.persistence.view.spi.EmbeddingViewJpqlMacro in project blaze-persistence by Blazebit.
the class EntityViewManagerImpl method createObjectBuilder.
public ObjectBuilder<?> createObjectBuilder(ManagedViewTypeImplementor<?> viewType, MappingConstructorImpl<?> mappingConstructor, Class<?> rootType, String entityViewRoot, String embeddingViewPath, FullQueryBuilder<?, ?> criteriaBuilder, EntityViewConfiguration configuration, int offset, int suffix, boolean nullFlatViewIfEmpty) {
ExpressionFactory ef = criteriaBuilder.getService(ExpressionFactory.class);
if (!viewType.getEntityClass().isAssignableFrom(rootType)) {
if (rootType.isAssignableFrom(viewType.getEntityClass())) {
entityViewRoot = "TREAT(" + entityViewRoot + " AS " + metamodel.getEntityMetamodel().getEntity(viewType.getJavaType()).getName() + ")";
} else {
throw new IllegalArgumentException("The given view type with the entity type '" + viewType.getEntityClass().getName() + "' can not be applied to the query builder with result type '" + rootType.getName() + "'");
}
}
MacroConfiguration originalMacroConfiguration = ef.getDefaultMacroConfiguration();
ExpressionFactory cachingExpressionFactory = ef.unwrap(AbstractCachingExpressionFactory.class);
JpqlMacro viewRootJpqlMacro = new DefaultViewRootJpqlMacro(entityViewRoot);
ViewJpqlMacro viewJpqlMacro = configuration.getViewJpqlMacro();
EmbeddingViewJpqlMacro embeddingViewJpqlMacro = configuration.getEmbeddingViewJpqlMacro();
viewJpqlMacro.setViewPath(entityViewRoot);
Map<String, MacroFunction> macros = new HashMap<>();
macros.put("view", new JpqlMacroAdapter(viewJpqlMacro, cachingExpressionFactory));
macros.put("view_root", new JpqlMacroAdapter(viewRootJpqlMacro, cachingExpressionFactory));
macros.put("embedding_view", new JpqlMacroAdapter(embeddingViewJpqlMacro, cachingExpressionFactory));
MacroConfiguration macroConfiguration = originalMacroConfiguration.with(macros);
MacroConfigurationExpressionFactory macroEf = new MacroConfigurationExpressionFactory(cachingExpressionFactory, macroConfiguration);
criteriaBuilder.registerMacro("view_root", viewRootJpqlMacro);
return getTemplate(macroEf, viewType, mappingConstructor, entityViewRoot, viewJpqlMacro, embeddingViewPath, embeddingViewJpqlMacro, offset).createObjectBuilder(criteriaBuilder, configuration.getOptionalParameters(), configuration, suffix, false, nullFlatViewIfEmpty);
}
use of com.blazebit.persistence.view.spi.EmbeddingViewJpqlMacro 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;
}
use of com.blazebit.persistence.view.spi.EmbeddingViewJpqlMacro in project blaze-persistence by Blazebit.
the class CorrelatedSubviewJoinTupleTransformerFactory method create.
@Override
public TupleTransformer create(ParameterHolder<?> parameterHolder, Map<String, Object> optionalParameters, EntityViewConfiguration entityViewConfiguration) {
if (!entityViewConfiguration.hasSubFetches(attributePath)) {
return new NullTupleTransformer(template);
}
// For now it's ok, but at some point we will want to support correlated attributes somehow and need to think of a fallback solution here
if (parameterHolder instanceof FullQueryBuilder<?, ?>) {
FullQueryBuilder<?, ?> queryBuilder = (FullQueryBuilder<?, ?>) parameterHolder;
CorrelationProvider provider = correlationProviderFactory.create(parameterHolder, optionalParameters);
JoinCorrelationBuilder correlationBuilder = new JoinCorrelationBuilder(parameterHolder, optionalParameters, queryBuilder, joinBase, correlationAlias, correlationExternalAlias, attributePath, JoinType.LEFT, limiter);
int originalFirstResult = -1;
int originalMaxResults = -1;
if (queryBuilder instanceof LimitBuilder<?>) {
originalFirstResult = ((LimitBuilder<?>) queryBuilder).getFirstResult();
originalMaxResults = ((LimitBuilder<?>) queryBuilder).getMaxResults();
}
ViewJpqlMacro viewJpqlMacro = entityViewConfiguration.getViewJpqlMacro();
EmbeddingViewJpqlMacro embeddingViewJpqlMacro = entityViewConfiguration.getEmbeddingViewJpqlMacro();
String oldViewPath = viewJpqlMacro.getViewPath();
String oldEmbeddingViewPath = embeddingViewJpqlMacro.getEmbeddingViewPath();
// If this uses a static path, we need to avoid setting the embedding view path etc.
if (!(provider instanceof StaticPathCorrelationProvider)) {
viewJpqlMacro.setViewPath(correlationBuilder.getCorrelationAlias());
embeddingViewJpqlMacro.setEmbeddingViewPath(embeddingViewPath);
}
provider.applyCorrelation(correlationBuilder, correlationBasis);
if (queryBuilder instanceof LimitBuilder<?>) {
if (originalFirstResult != ((LimitBuilder<?>) queryBuilder).getFirstResult() || originalMaxResults != ((LimitBuilder<?>) queryBuilder).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!");
}
}
correlationBuilder.finish();
if (!(provider instanceof StaticPathCorrelationProvider)) {
viewJpqlMacro.setViewPath(oldViewPath);
embeddingViewJpqlMacro.setEmbeddingViewPath(oldEmbeddingViewPath);
}
if (fetches.length != 0) {
for (int i = 0; i < fetches.length; i++) {
queryBuilder.fetch(correlationBuilder.getCorrelationAlias() + "." + fetches[i]);
}
}
ObjectBuilder<Object[]> objectBuilder = template.createObjectBuilder(parameterHolder, optionalParameters, entityViewConfiguration, 0, true, false);
return new CorrelatedSubviewJoinTupleTransformer(template, objectBuilder);
} else {
throw new UnsupportedOperationException("Converting views with correlated attributes isn't supported!");
}
}
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