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Add support for a new relation asOfJoin operation (#3162)
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...ent/src/main/java/org/finos/legend/engine/repl/autocomplete/handlers/AsOfJoinHandler.java
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// Copyright 2024 Goldman Sachs | ||
// | ||
// 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.finos.legend.engine.repl.autocomplete.handlers; | ||
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import org.eclipse.collections.api.list.MutableList; | ||
import org.eclipse.collections.impl.factory.Lists; | ||
import org.finos.legend.engine.language.pure.compiler.toPureGraph.CompileContext; | ||
import org.finos.legend.engine.language.pure.compiler.toPureGraph.ProcessingContext; | ||
import org.finos.legend.engine.language.pure.compiler.toPureGraph.PureModel; | ||
import org.finos.legend.engine.language.pure.compiler.toPureGraph.ValueSpecificationBuilder; | ||
import org.finos.legend.engine.protocol.pure.v1.model.valueSpecification.ValueSpecification; | ||
import org.finos.legend.engine.protocol.pure.v1.model.valueSpecification.Variable; | ||
import org.finos.legend.engine.protocol.pure.v1.model.valueSpecification.application.AppliedFunction; | ||
import org.finos.legend.engine.protocol.pure.v1.model.valueSpecification.raw.Lambda; | ||
import org.finos.legend.engine.repl.autocomplete.Completer; | ||
import org.finos.legend.engine.repl.autocomplete.CompletionItem; | ||
import org.finos.legend.engine.repl.autocomplete.FunctionHandler; | ||
import org.finos.legend.pure.m3.coreinstance.meta.pure.metamodel.type.generics.GenericType; | ||
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public class AsOfJoinHandler extends FunctionHandler | ||
{ | ||
@Override | ||
public String functionName() | ||
{ | ||
return "asOfJoin"; | ||
} | ||
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@Override | ||
public MutableList<CompletionItem> proposedParameters(AppliedFunction currentFunc, GenericType leftType, PureModel pureModel, Completer completer, ProcessingContext processingContext, ValueSpecification currentVS) | ||
{ | ||
if (currentFunc.parameters.size() == 2) | ||
{ | ||
return completer.processValueSpecification(currentFunc.parameters.get(1), currentVS, pureModel, processingContext).getCompletion(); | ||
} | ||
return Lists.mutable.empty(); | ||
} | ||
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public void handleFunctionAppliedParameters(AppliedFunction currentFunc, GenericType leftType, ProcessingContext processingContext, PureModel pureModel) | ||
{ | ||
if (currentFunc.parameters.size() == 3) | ||
{ | ||
processLambda(currentFunc, currentFunc.parameters.get(2), leftType, processingContext, pureModel); | ||
} | ||
if (currentFunc.parameters.size() == 4) | ||
{ | ||
processLambda(currentFunc, currentFunc.parameters.get(3), leftType, processingContext, pureModel); | ||
} | ||
} | ||
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private static void processLambda(AppliedFunction currentFunc, ValueSpecification value, GenericType leftType, ProcessingContext processingContext, PureModel pureModel) | ||
{ | ||
GenericType genericType = currentFunc.parameters.get(1).accept(new ValueSpecificationBuilder(new CompileContext.Builder(pureModel).build(), Lists.mutable.empty(), processingContext))._genericType()._typeArguments().getFirst(); | ||
if (value instanceof Lambda) | ||
{ | ||
processLambda((Lambda)value, leftType._typeArguments().getFirst(), genericType, processingContext, pureModel); | ||
} | ||
} | ||
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private static void processLambda(Lambda lambda, GenericType first, GenericType second, ProcessingContext processingContext, PureModel pureModel) | ||
{ | ||
if (lambda != null) | ||
{ | ||
Variable f_variable = lambda.parameters.get(0); | ||
processingContext.addInferredVariables(f_variable.name, buildTypedVariable(f_variable, first, pureModel.getMultiplicity("one"), pureModel)); | ||
Variable s_variable = lambda.parameters.get(1); | ||
processingContext.addInferredVariables(s_variable.name, buildTypedVariable(s_variable, second, pureModel.getMultiplicity("one"), pureModel)); | ||
} | ||
} | ||
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} |
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