| /* |
| * Copyright 2009-2013 by The Regents of the University of California |
| * 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 from |
| * |
| * 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 edu.uci.ics.asterix.om.typecomputer.impl; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.apache.commons.lang3.mutable.Mutable; |
| |
| import edu.uci.ics.asterix.common.exceptions.AsterixException; |
| import edu.uci.ics.asterix.om.base.AString; |
| import edu.uci.ics.asterix.om.constants.AsterixConstantValue; |
| import edu.uci.ics.asterix.om.typecomputer.base.IResultTypeComputer; |
| import edu.uci.ics.asterix.om.typecomputer.base.TypeComputerUtilities; |
| import edu.uci.ics.asterix.om.types.ARecordType; |
| import edu.uci.ics.asterix.om.types.IAType; |
| import edu.uci.ics.asterix.om.types.TypeHelper; |
| import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalExpression; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.base.LogicalExpressionTag; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.AbstractFunctionCallExpression; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.ConstantExpression; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.IVariableTypeEnvironment; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.metadata.IMetadataProvider; |
| |
| public class OpenRecordConstructorResultType implements IResultTypeComputer { |
| |
| public static final OpenRecordConstructorResultType INSTANCE = new OpenRecordConstructorResultType(); |
| |
| @Override |
| public IAType computeType(ILogicalExpression expression, IVariableTypeEnvironment env, |
| IMetadataProvider<?, ?> metadataProvider) throws AlgebricksException { |
| AbstractFunctionCallExpression f = (AbstractFunctionCallExpression) expression; |
| |
| /** |
| * if type has been top-down propagated, use the enforced type |
| */ |
| ARecordType type = (ARecordType) TypeComputerUtilities.getRequiredType(f); |
| if (type != null) |
| return type; |
| |
| int n = 0; |
| Iterator<Mutable<ILogicalExpression>> argIter = f.getArguments().iterator(); |
| List<String> namesList = new ArrayList<String>(); |
| List<IAType> typesList = new ArrayList<IAType>(); |
| while (argIter.hasNext()) { |
| ILogicalExpression e1 = argIter.next().getValue(); |
| ILogicalExpression e2 = argIter.next().getValue(); |
| IAType t2 = (IAType) env.getType(e2); |
| if (e1.getExpressionTag() == LogicalExpressionTag.CONSTANT && t2 != null && TypeHelper.isClosed(t2)) { |
| ConstantExpression nameExpr = (ConstantExpression) e1; |
| AsterixConstantValue acv = (AsterixConstantValue) nameExpr.getValue(); |
| namesList.add(((AString) acv.getObject()).getStringValue()); |
| typesList.add(t2); |
| n++; |
| } |
| } |
| String[] fieldNames = new String[n]; |
| IAType[] fieldTypes = new IAType[n]; |
| fieldNames = namesList.toArray(fieldNames); |
| fieldTypes = typesList.toArray(fieldTypes); |
| try { |
| return new ARecordType(null, fieldNames, fieldTypes, true); |
| } catch (AsterixException e) { |
| throw new AlgebricksException(e); |
| } |
| } |
| } |