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.external.library;
  
  import org.apache.asterix.common.exceptions.ErrorCode;
  import org.apache.asterix.common.exceptions.RuntimeDataException;
  import org.apache.asterix.om.functions.IExternalFunctionInfo;
  import org.apache.asterix.om.types.IAType;
  import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluator;
  import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
  import org.apache.hyracks.api.context.IEvaluatorContext;
  import org.apache.hyracks.api.exceptions.HyracksDataException;
  import org.apache.hyracks.api.exceptions.SourceLocation;
  
  public class ExternalScalarFunctionEvaluatorFactory implements IScalarEvaluatorFactory {
  
      private static final long serialVersionUID = 1L;
      private final IExternalFunctionInfo finfo;
      private final IScalarEvaluatorFactory[] args;
      private final IAType[] argTypes;
      private final SourceLocation sourceLoc;
  
      public ExternalScalarFunctionEvaluatorFactory(IExternalFunctionInfo finfo, IScalarEvaluatorFactory[] args,
              IAType[] argTypes, SourceLocation sourceLoc) {
          this.finfo = finfo;
          this.args = args;
          this.argTypes = argTypes;
          this.sourceLoc = sourceLoc;
      }
  
      @Override
      public IScalarEvaluator createScalarEvaluator(IEvaluatorContext ctx) throws HyracksDataException {
          switch (finfo.getLanguage()) {
              case JAVA:
                  return new ExternalScalarJavaFunctionEvaluator(finfo, args, argTypes, ctx);
              case PYTHON:
                  return new ExternalScalarPythonFunctionEvaluator(finfo, args, argTypes, ctx, sourceLoc);
              default:
                  throw new RuntimeDataException(ErrorCode.LIBRARY_EXTERNAL_FUNCTION_UNSUPPORTED_KIND,
                          finfo.getLanguage());
          }
      }
  }
  