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core/src/main/java/org/polypheny/db/adapter/enumerable/EnumerableDocumentValues.java
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| /* | ||
| * Copyright 2019-2023 The Polypheny Project | ||
| * | ||
| * 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. | ||
| */ | ||
|
|
||
| package org.polypheny.db.adapter.enumerable; | ||
|
|
||
| import com.google.common.collect.ImmutableList; | ||
| import java.lang.reflect.Type; | ||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import org.apache.calcite.linq4j.tree.BlockBuilder; | ||
| import org.apache.calcite.linq4j.tree.Expression; | ||
| import org.apache.calcite.linq4j.tree.Expressions; | ||
| import org.apache.calcite.linq4j.tree.Primitive; | ||
| import org.bson.BsonValue; | ||
| import org.polypheny.db.adapter.java.JavaTypeFactory; | ||
| import org.polypheny.db.algebra.core.document.DocumentValues; | ||
| import org.polypheny.db.algebra.type.AlgDataType; | ||
| import org.polypheny.db.algebra.type.AlgDataTypeField; | ||
| import org.polypheny.db.plan.AlgOptCluster; | ||
| import org.polypheny.db.plan.AlgTraitSet; | ||
| import org.polypheny.db.schema.ModelTrait; | ||
| import org.polypheny.db.util.BuiltInMethod; | ||
|
|
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| public class EnumerableDocumentValues extends DocumentValues implements EnumerableAlg { | ||
|
|
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| /** | ||
| * Creates a {@link DocumentValues}. | ||
| * {@link ModelTrait#DOCUMENT} node, which contains values. | ||
| * | ||
| * @param cluster | ||
| * @param traitSet | ||
| * @param rowType | ||
| * @param documentTuples | ||
| */ | ||
| public EnumerableDocumentValues( AlgOptCluster cluster, AlgTraitSet traitSet, AlgDataType rowType, List<BsonValue> documentTuples ) { | ||
| super( cluster, traitSet, rowType, ImmutableList.copyOf( documentTuples ) ); | ||
| } | ||
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| @Override | ||
| public Result implement( EnumerableAlgImplementor implementor, Prefer pref ) { | ||
| final JavaTypeFactory typeFactory = (JavaTypeFactory) getCluster().getTypeFactory(); | ||
| final BlockBuilder builder = new BlockBuilder(); | ||
| final PhysType physType = | ||
| PhysTypeImpl.of( | ||
| implementor.getTypeFactory(), | ||
| getRowType(), | ||
| pref.preferCustom() ); | ||
| final Type rowClass = physType.getJavaRowType(); | ||
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| final List<Expression> expressions = new ArrayList<>(); | ||
| final List<AlgDataTypeField> fields = rowType.getFieldList(); | ||
| for ( BsonValue doc : documentTuples ) { | ||
| final List<Expression> literals = new ArrayList<>(); | ||
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| literals.add( Expressions.constant( doc.asDocument().toJson() ) ); | ||
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| expressions.add( physType.record( literals ) ); | ||
| } | ||
| builder.add( | ||
| Expressions.return_( | ||
| null, | ||
| Expressions.call( | ||
| BuiltInMethod.AS_ENUMERABLE.method, | ||
| Expressions.newArrayInit( Primitive.box( rowClass ), expressions ) ) ) ); | ||
| return implementor.result( physType, builder.toBlock() ); | ||
| } | ||
|
|
||
| } |
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