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[#1393] Use TupleTransformer for SUBSELECT and MULTISET fetching to a…
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48 changes: 24 additions & 24 deletions
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.../java/com/blazebit/persistence/view/impl/objectbuilder/ViewTypeObjectBuilderTemplate.java
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183 changes: 0 additions & 183 deletions
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...lazebit/persistence/view/impl/objectbuilder/transformer/MultisetTupleListTransformer.java
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111 changes: 111 additions & 0 deletions
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...om/blazebit/persistence/view/impl/objectbuilder/transformer/MultisetTupleTransformer.java
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| /* | ||
| * Copyright 2014 - 2021 Blazebit. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
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| package com.blazebit.persistence.view.impl.objectbuilder.transformer; | ||
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| import com.blazebit.persistence.view.impl.objectbuilder.ContainerAccumulator; | ||
| import com.blazebit.persistence.view.impl.objectbuilder.transformator.TupleTransformator; | ||
| import com.blazebit.persistence.view.impl.objectbuilder.transformator.UpdatableViewMap; | ||
| import com.blazebit.persistence.view.spi.type.BasicUserTypeStringSupport; | ||
| import com.blazebit.persistence.view.spi.type.TypeConverter; | ||
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| import java.util.List; | ||
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| /** | ||
| * | ||
| * @author Christian Beikov | ||
| * @since 1.5.0 | ||
| */ | ||
| public class MultisetTupleTransformer implements TupleTransformer { | ||
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| private final int startIndex; | ||
| private final boolean hasSelectOrSubselectFetchedAttributes; | ||
| private final TupleTransformator tupleTransformator; | ||
| private final TupleTransformer subviewTupleTransformer; | ||
| private final TupleTransformer indexSubviewTupleTransformer; | ||
| private final int indexStartIndex; | ||
| private final BasicUserTypeStringSupport<Object>[] fieldConverters; | ||
| private final TypeConverter<Object, Object> elementConverter; | ||
| private final ContainerAccumulator<Object> containerAccumulator; | ||
| private final boolean dirtyTracking; | ||
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| public MultisetTupleTransformer(int startIndex, boolean hasSelectOrSubselectFetchedAttributes, TupleTransformator tupleTransformator, TupleTransformer subviewTupleTransformer, TupleTransformer indexSubviewTupleTransformer, int indexStartIndex, | ||
| BasicUserTypeStringSupport<Object>[] fieldConverters, TypeConverter<Object, Object> elementConverter, ContainerAccumulator<Object> containerAccumulator, boolean dirtyTracking) { | ||
| this.startIndex = startIndex; | ||
| this.hasSelectOrSubselectFetchedAttributes = hasSelectOrSubselectFetchedAttributes; | ||
| this.tupleTransformator = tupleTransformator; | ||
| this.subviewTupleTransformer = subviewTupleTransformer; | ||
| this.indexSubviewTupleTransformer = indexSubviewTupleTransformer; | ||
| this.indexStartIndex = indexStartIndex; | ||
| this.elementConverter = elementConverter; | ||
| this.fieldConverters = fieldConverters; | ||
| this.containerAccumulator = containerAccumulator; | ||
| this.dirtyTracking = dirtyTracking; | ||
| } | ||
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| @Override | ||
| public int getConsumeStartIndex() { | ||
| return startIndex; | ||
| } | ||
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| @Override | ||
| public int getConsumeEndIndex() { | ||
| return startIndex + 1; | ||
| } | ||
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| @Override | ||
| public Object[] transform(Object[] tuple, UpdatableViewMap updatableViewMap) { | ||
| Object collection = containerAccumulator.createContainer(dirtyTracking, 0); | ||
| if (tuple[startIndex] != null) { | ||
| List<Object[]> objects = (List<Object[]>) tuple[startIndex]; | ||
| for (int i = 0; i < objects.size(); i++) { | ||
| Object[] elementTuple = objects.get(i); | ||
| for (int j = 0; j < fieldConverters.length; j++) { | ||
| if (elementTuple[j] instanceof CharSequence) { | ||
| elementTuple[j] = fieldConverters[j].fromString((CharSequence) elementTuple[j]); | ||
| } | ||
| } | ||
| } | ||
| if (tupleTransformator != null) { | ||
| // Before building the subviews, apply the tuple transformator on the nested set in isolation | ||
| tupleTransformator.transformAll(objects); | ||
| } | ||
| for (int i = 0; i < objects.size(); i++) { | ||
| Object indexObject = null; | ||
| if (indexSubviewTupleTransformer != null) { | ||
| indexObject = indexSubviewTupleTransformer.transform(objects.get(i), updatableViewMap)[indexSubviewTupleTransformer.getConsumeStartIndex() - 1]; | ||
| } else if (indexStartIndex != -1) { | ||
| indexObject = objects.get(i)[indexStartIndex]; | ||
| } | ||
| if (subviewTupleTransformer == null) { | ||
| add(collection, indexObject, objects.get(i)[startIndex]); | ||
| } else { | ||
| Object[] transformedTuple = subviewTupleTransformer.transform(objects.get(i), updatableViewMap); | ||
| add(collection, indexObject, transformedTuple[0]); | ||
| } | ||
| } | ||
| } | ||
| tuple[startIndex] = collection; | ||
| return tuple; | ||
| } | ||
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| protected void add(Object collection, Object index, Object value) { | ||
| if (elementConverter != null) { | ||
| value = elementConverter.convertToViewType(value); | ||
| } | ||
| containerAccumulator.add(collection, index, value, dirtyTracking); | ||
| } | ||
| } |
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