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.formats.nontagged;
  
  import java.io.Serializable;
  
  import org.apache.asterix.om.types.ATypeTag;
  import org.apache.hyracks.algebricks.common.exceptions.AlgebricksException;
  import org.apache.hyracks.algebricks.data.ILinearizeComparatorFactoryProvider;
  import org.apache.hyracks.api.dataflow.value.IBinaryComparatorFactory;
  import org.apache.hyracks.api.dataflow.value.ILinearizeComparatorFactory;
  import org.apache.hyracks.storage.am.rtree.linearize.HilbertDoubleComparatorFactory;
  import org.apache.hyracks.storage.am.rtree.linearize.ZCurveDoubleComparatorFactory;
  import org.apache.hyracks.storage.am.rtree.linearize.ZCurveIntComparatorFactory;
  
  public class LinearizeComparatorFactoryProvider implements ILinearizeComparatorFactoryProvider, Serializable {
  
      private static final long serialVersionUID = 1L;
      public static final LinearizeComparatorFactoryProvider INSTANCE = new LinearizeComparatorFactoryProvider();
  
      private LinearizeComparatorFactoryProvider() {
      }
  
      @Override
      public ILinearizeComparatorFactory getLinearizeComparatorFactory(Object type, boolean ascending, int dimension)
              throws AlgebricksException {
          ATypeTag typeTag = (ATypeTag) type;
  
          if (dimension == 2 && (typeTag == ATypeTag.DOUBLE)) {
              return addOffset(new HilbertDoubleComparatorFactory(2), ascending);
          } else if (typeTag == ATypeTag.DOUBLE) {
              return addOffset(new ZCurveDoubleComparatorFactory(dimension), ascending);
          } else if (typeTag == ATypeTag.TINYINT || typeTag == ATypeTag.SMALLINT || typeTag == ATypeTag.INTEGER
                  || typeTag == ATypeTag.BIGINT) {
              return addOffset(new ZCurveIntComparatorFactory(dimension), ascending);
          } else {
              throw new AlgebricksException(
                      "Cannot propose linearizer for key with type " + typeTag + " and dimension " + dimension + ".");
          }
      }
  
      private ILinearizeComparatorFactory addOffset(final IBinaryComparatorFactory inst, final boolean ascending) {
          return new OrderedLinearizeComparatorFactory(inst, ascending);
      }
  }
  