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.metadata.declared;
  
  import java.util.Collections;
  import java.util.List;
  import java.util.Map;
  
  import org.apache.asterix.common.external.IExternalFilterEvaluatorFactory;
  import org.apache.asterix.external.api.IExternalDataRuntimeContext;
  import org.apache.asterix.external.api.IRecordReader;
  import org.apache.asterix.external.api.IRecordReaderFactory;
  import org.apache.asterix.metadata.api.IDatasourceFunction;
  import org.apache.hyracks.algebricks.common.constraints.AlgebricksAbsolutePartitionConstraint;
  import org.apache.hyracks.algebricks.common.exceptions.AlgebricksException;
  import org.apache.hyracks.api.application.IServiceContext;
  import org.apache.hyracks.api.exceptions.HyracksDataException;
  import org.apache.hyracks.api.exceptions.IWarningCollector;
  
  public class FunctionDataSourceFactory implements IRecordReaderFactory<char[]> {
  
      private static final long serialVersionUID = 1L;
      private final IDatasourceFunction function;
  
      public FunctionDataSourceFactory(IDatasourceFunction function) {
          this.function = function;
      }
  
      @Override
      public final DataSourceType getDataSourceType() {
          return DataSourceType.RECORDS;
      }
  
      @Override
      public AlgebricksAbsolutePartitionConstraint getPartitionConstraint() throws AlgebricksException {
          return function.getPartitionConstraint();
      }
  
      @Override
      public void configure(IServiceContext ctx, Map<String, String> configuration, IWarningCollector warningCollector,
              IExternalFilterEvaluatorFactory filterEvaluatorFactory) throws AlgebricksException, HyracksDataException {
          // No Op
      }
  
      @Override
      public IRecordReader<? extends char[]> createRecordReader(IExternalDataRuntimeContext context)
              throws HyracksDataException {
          return function.createRecordReader(context.getTaskContext(), context.getPartition());
      }
  
      @Override
      public Class<?> getRecordClass() {
          return char[].class;
      }
  
      @Override
      public List<String> getRecordReaderNames() {
          return Collections.emptyList();
      }
  }
  