content: /*
   * 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 java.util.Iterator;
  
  import org.apache.asterix.common.exceptions.CompilationException;
  import org.apache.asterix.common.exceptions.ErrorCode;
  import org.apache.asterix.om.exceptions.InvalidExpressionException;
  import org.apache.asterix.om.typecomputer.base.IResultTypeComputer;
  import org.apache.asterix.om.typecomputer.base.TypeCastUtils;
  import org.apache.asterix.om.types.ARecordType;
  import org.apache.asterix.om.types.ATypeTag;
  import org.apache.asterix.om.types.AUnionType;
  import org.apache.asterix.om.types.IAType;
  import org.apache.asterix.om.utils.ConstantExpressionUtil;
  import org.apache.commons.lang3.mutable.Mutable;
  import org.apache.hyracks.algebricks.common.exceptions.AlgebricksException;
  import org.apache.hyracks.algebricks.core.algebra.base.ILogicalExpression;
  import org.apache.hyracks.algebricks.core.algebra.base.LogicalExpressionTag;
  import org.apache.hyracks.algebricks.core.algebra.expressions.AbstractFunctionCallExpression;
  import org.apache.hyracks.algebricks.core.algebra.expressions.IVariableTypeEnvironment;
  import org.apache.hyracks.algebricks.core.algebra.metadata.IMetadataProvider;
  import org.apache.hyracks.util.LogRedactionUtil;
  
  public class ClosedRecordConstructorResultType implements IResultTypeComputer {
  
      public static final ClosedRecordConstructorResultType INSTANCE = new ClosedRecordConstructorResultType();
  
      @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) TypeCastUtils.getRequiredType(f);
          if (type != null) {
              return type;
          }
  
          int n = f.getArguments().size() / 2;
          String[] fieldNames = new String[n];
          IAType[] fieldTypes = new IAType[n];
          int i = 0;
          Iterator<Mutable<ILogicalExpression>> argIter = f.getArguments().iterator();
          while (argIter.hasNext()) {
              ILogicalExpression e1 = argIter.next().getValue();
              ILogicalExpression e2 = argIter.next().getValue();
              IAType e2Type = (IAType) env.getType(e2);
              if (e2Type.getTypeTag() == ATypeTag.UNION) {
                  AUnionType unionType = (AUnionType) e2Type;
                  e2Type = AUnionType.createUnknownableType(unionType.getActualType());
              }
              String fieldName = ConstantExpressionUtil.getStringConstant(e1);
              if (fieldName == null) {
                  throw new InvalidExpressionException(f.getSourceLocation(), f.getFunctionIdentifier(), 2 * i, e1,
                          LogicalExpressionTag.CONSTANT);
              }
              for (int j = 0; j < i; j++) {
                  if (fieldName.equals(fieldNames[j])) {
                      throw new CompilationException(ErrorCode.DUPLICATE_FIELD_NAME, f.getSourceLocation(),
                              LogRedactionUtil.userData(fieldName));
                  }
              }
              fieldTypes[i] = e2Type;
              fieldNames[i] = fieldName;
              i++;
          }
          return new ARecordType(null, fieldNames, fieldTypes, false);
      }
  }
  