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108 changes: 108 additions & 0 deletions
108
.../src/main/java/org/polypheny/db/workflow/dag/activities/impl/DocSelectFieldsActivity.java
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| /* | ||
| * Copyright 2019-2025 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. | ||
| */ | ||
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| package org.polypheny.db.workflow.dag.activities.impl; | ||
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| import java.util.List; | ||
| import java.util.Map; | ||
| import java.util.Optional; | ||
| import java.util.stream.Collectors; | ||
| import org.apache.commons.lang3.NotImplementedException; | ||
| import org.polypheny.db.algebra.AlgNode; | ||
| import org.polypheny.db.algebra.logical.document.LogicalDocumentProject; | ||
| import org.polypheny.db.algebra.type.AlgDataType; | ||
| import org.polypheny.db.plan.AlgCluster; | ||
| import org.polypheny.db.rex.RexNameRef; | ||
| import org.polypheny.db.rex.RexNode; | ||
| import org.polypheny.db.workflow.dag.activities.Activity; | ||
| import org.polypheny.db.workflow.dag.activities.Activity.ActivityCategory; | ||
| import org.polypheny.db.workflow.dag.activities.Activity.PortType; | ||
| import org.polypheny.db.workflow.dag.activities.ActivityException; | ||
| import org.polypheny.db.workflow.dag.activities.Fusable; | ||
| import org.polypheny.db.workflow.dag.activities.Pipeable; | ||
| import org.polypheny.db.workflow.dag.activities.TypePreview; | ||
| import org.polypheny.db.workflow.dag.activities.TypePreview.DocType; | ||
| import org.polypheny.db.workflow.dag.annotations.ActivityDefinition; | ||
| import org.polypheny.db.workflow.dag.annotations.ActivityDefinition.InPort; | ||
| import org.polypheny.db.workflow.dag.annotations.ActivityDefinition.OutPort; | ||
| import org.polypheny.db.workflow.dag.annotations.FieldSelectSetting; | ||
| import org.polypheny.db.workflow.dag.settings.FieldSelectValue; | ||
| import org.polypheny.db.workflow.dag.settings.SettingDef.Settings; | ||
| import org.polypheny.db.workflow.dag.settings.SettingDef.SettingsPreview; | ||
| import org.polypheny.db.workflow.engine.execution.context.ExecutionContext; | ||
| import org.polypheny.db.workflow.engine.execution.context.PipeExecutionContext; | ||
| import org.polypheny.db.workflow.engine.execution.pipe.InputPipe; | ||
| import org.polypheny.db.workflow.engine.execution.pipe.OutputPipe; | ||
| import org.polypheny.db.workflow.engine.storage.reader.CheckpointReader; | ||
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| @ActivityDefinition(type = "docSelectFields", displayName = "Select Document Fields", categories = { ActivityCategory.TRANSFORM, ActivityCategory.DOCUMENT, }, | ||
| inPorts = { @InPort(type = PortType.DOC, description = "The input collection.") }, | ||
| outPorts = { @OutPort(type = PortType.DOC, description = "Collection containing only the specified fields of the input table. The '_id' field is always included.") }, | ||
| shortDescription = "Select a subset of (nested) fields of the input collection." | ||
| ) | ||
| @FieldSelectSetting(key = "fields", displayName = "Select Fields", reorder = false, | ||
| shortDescription = "Specify which fields to include. Alternatively, you can include any field not present in the list of excluded fields.") | ||
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| @SuppressWarnings("unused") | ||
| public class DocSelectFieldsActivity implements Activity, Fusable, Pipeable { | ||
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| @Override | ||
| public List<TypePreview> previewOutTypes( List<TypePreview> inTypes, SettingsPreview settings ) throws ActivityException { | ||
| return DocType.of().asOutTypes(); | ||
| } | ||
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| @Override | ||
| public void execute( List<CheckpointReader> inputs, Settings settings, ExecutionContext ctx ) throws Exception { | ||
| Fusable.super.execute( inputs, settings, ctx ); | ||
| } | ||
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| @Override | ||
| public AlgNode fuse( List<AlgNode> inputs, Settings settings, AlgCluster cluster ) throws Exception { | ||
| AlgDataType type = getDocType(); | ||
| FieldSelectValue setting = settings.get( "fields", FieldSelectValue.class ); | ||
| if ( setting.includeUnspecified() ) { | ||
| return LogicalDocumentProject.create( inputs.get( 0 ), Map.of(), setting.getExclude() ); | ||
| } | ||
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| List<String> fields = setting.getInclude(); | ||
| Map<String, RexNode> nameRefs = fields.stream().collect( Collectors.toMap( | ||
| field -> field, | ||
| field -> RexNameRef.create( List.of( field.split( "\\." ) ), null, type ) | ||
| ) ); | ||
| return LogicalDocumentProject.create( inputs.get( 0 ), nameRefs, setting.getExclude() ); | ||
| } | ||
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| @Override | ||
| public AlgDataType lockOutputType( List<AlgDataType> inTypes, Settings settings ) throws Exception { | ||
| return getDocType(); | ||
| } | ||
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| @Override | ||
| public void pipe( List<InputPipe> inputs, OutputPipe output, Settings settings, PipeExecutionContext ctx ) throws Exception { | ||
| throw new NotImplementedException( "Pipe is not yet implemented." ); | ||
| } | ||
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| @Override | ||
| public Optional<Boolean> canPipe( List<TypePreview> inTypes, SettingsPreview settings ) { | ||
| return Optional.of( false ); // TODO: implement pipe | ||
| } | ||
|
|
||
| } |
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