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.api.INcApplicationContext;
  import org.apache.asterix.common.library.ILibraryManager;
  import org.apache.asterix.external.ipc.ExternalFunctionResultRouter;
  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.ipc.impl.IPCSystem;
  
  public abstract class ExternalScalarFunctionEvaluator implements IScalarEvaluator {
  
      protected final IExternalFunctionInfo finfo;
      protected final IScalarEvaluator[] argEvals;
      protected final IAType[] argTypes;
      protected final ILibraryManager libraryManager;
      protected final ExternalFunctionResultRouter router;
      protected final IPCSystem ipcSys;
  
      public ExternalScalarFunctionEvaluator(IExternalFunctionInfo finfo, IScalarEvaluatorFactory[] args,
              IAType[] argTypes, IEvaluatorContext context) throws HyracksDataException {
          this.finfo = finfo;
          this.argTypes = argTypes;
          argEvals = new IScalarEvaluator[args.length];
          for (int i = 0; i < args.length; i++) {
              argEvals[i] = args[i].createScalarEvaluator(context);
          }
          libraryManager =
                  ((INcApplicationContext) context.getServiceContext().getApplicationContext()).getLibraryManager();
          router = libraryManager.getRouter();
          ipcSys = libraryManager.getIPCI();
      }
  }
  