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 org.apache.asterix.om.typecomputer.base.AbstractResultTypeComputer;
  import org.apache.asterix.om.types.AUnionType;
  import org.apache.asterix.om.types.AbstractCollectionType;
  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.functions.FunctionIdentifier;
  import org.apache.hyracks.api.exceptions.SourceLocation;
  
  public class ScalarVersionOfAggregateResultType extends AbstractResultTypeComputer {
  
      private final AggregateResultTypeComputer aggResultTypeComputer;
  
      public ScalarVersionOfAggregateResultType(AggregateResultTypeComputer aggResultTypeComputer) {
          this.aggResultTypeComputer = aggResultTypeComputer;
      }
  
      @Override
      protected void checkArgType(FunctionIdentifier funcId, int argIndex, IAType argType, SourceLocation sourceLoc)
              throws AlgebricksException {
          if (argIndex == 0) {
              switch (argType.getTypeTag()) {
                  case ARRAY:
                  case MULTISET:
                      AbstractCollectionType act = (AbstractCollectionType) argType;
                      aggResultTypeComputer.checkArgType(funcId, argIndex, act.getItemType(), sourceLoc);
                      break;
              }
          }
      }
  
      @Override
      protected IAType getResultType(ILogicalExpression expr, IAType... strippedInputTypes) throws AlgebricksException {
          IAType argType = strippedInputTypes[0];
          switch (argType.getTypeTag()) {
              case ARRAY:
              case MULTISET:
                  AbstractCollectionType act = (AbstractCollectionType) argType;
                  IAType[] strippedInputTypes2 = strippedInputTypes.clone();
                  strippedInputTypes2[0] = act.getItemType();
                  IAType resultType = aggResultTypeComputer.getResultType(expr, strippedInputTypes2);
                  switch (resultType.getTypeTag()) {
                      case NULL:
                      case MISSING:
                      case ANY:
                          return resultType;
                      case UNION:
                          return AUnionType.createUnknownableType(((AUnionType) resultType).getActualType());
                      default:
                          return AUnionType.createUnknownableType(resultType);
                  }
              default:
                  return BuiltinType.ANY;
          }
      }
  }
  