| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.asterix.om.typecomputer.impl; |
| |
| import org.apache.asterix.om.typecomputer.base.IResultTypeComputer; |
| import org.apache.asterix.om.types.AUnionType; |
| import org.apache.asterix.om.types.BuiltinType; |
| import org.apache.asterix.om.types.IAType; |
| import org.apache.hyracks.algebricks.common.exceptions.AlgebricksException; |
| import org.apache.hyracks.algebricks.core.algebra.base.ILogicalExpression; |
| import org.apache.hyracks.algebricks.core.algebra.expressions.IVariableTypeEnvironment; |
| import org.apache.hyracks.algebricks.core.algebra.metadata.IMetadataProvider; |
| |
| public class BooleanOrMissingTypeComputer implements IResultTypeComputer { |
| |
| public static final BooleanOrMissingTypeComputer INSTANCE = new BooleanOrMissingTypeComputer(); |
| |
| private BooleanOrMissingTypeComputer() { |
| } |
| |
| @Override |
| public IAType computeType(ILogicalExpression expression, IVariableTypeEnvironment env, |
| IMetadataProvider<?, ?> metadataProvider) throws AlgebricksException { |
| return AUnionType.createMissableType(BuiltinType.ABOOLEAN); |
| } |
| |
| } |