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.om.functions.IExternalFunctionDescriptor;
  import org.apache.asterix.om.functions.IExternalFunctionInfo;
  import org.apache.asterix.om.types.IAType;
  import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
  import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
  import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
  
  public class ExternalScalarFunctionDescriptor extends AbstractScalarFunctionDynamicDescriptor
          implements IExternalFunctionDescriptor {
  
      private static final long serialVersionUID = 2L;
      private final IExternalFunctionInfo finfo;
      private IAType[] argTypes;
  
      public ExternalScalarFunctionDescriptor(IExternalFunctionInfo finfo) {
          this.finfo = finfo;
      }
  
      @Override
      public void setImmutableStates(Object... states) {
          argTypes = new IAType[states.length];
          for (int i = 0; i < states.length; i++) {
              argTypes[i] = (IAType) states[i];
          }
      }
  
      @Override
      public IScalarEvaluatorFactory createEvaluatorFactory(IScalarEvaluatorFactory[] args) {
          return new ExternalScalarFunctionEvaluatorFactory(finfo, args, argTypes, sourceLoc);
      }
  
      @Override
      public FunctionIdentifier getIdentifier() {
          return finfo.getFunctionIdentifier();
      }
  
      @Override
      public IExternalFunctionInfo getFunctionInfo() {
          return finfo;
      }
  
      @Override
      public IAType[] getArgumentTypes() {
          return argTypes;
      }
  }
  