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.carbondata.core.scan.filter.resolver.resolverinfo.visitor;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.carbondata.core.constants.CarbonCommonConstants;
  import org.apache.carbondata.core.scan.expression.conditional.EqualToExpression;
  import org.apache.carbondata.core.scan.expression.exception.FilterIllegalMemberException;
  import org.apache.carbondata.core.scan.expression.exception.FilterUnsupportedException;
  import org.apache.carbondata.core.scan.filter.ColumnFilterInfo;
  import org.apache.carbondata.core.scan.filter.FilterUtil;
  import org.apache.carbondata.core.scan.filter.resolver.metadata.FilterResolverMetadata;
  import org.apache.carbondata.core.scan.filter.resolver.resolverinfo.ColumnResolvedFilterInfo;
  import org.apache.carbondata.core.scan.filter.resolver.resolverinfo.DimColumnResolvedFilterInfo;
  
  public class NoDictionaryTypeVisitor implements ResolvedFilterInfoVisitorIntf {
  
    /**
     * Visitor Method will update the filter related details in visitableObj, For no dictionary
     * type columns the filter members will resolved directly, no need to look up in dictionary
     * since it will not be part of dictionary, directly the actual data can be converted as
     * byte[] and can be set. this type of encoding is effective when the particular column
     * is having very high cardinality.
     *
     * @param visitableObj
     * @param metadata
     * @throws FilterUnsupportedException,if exception occurs while evaluating
     * filter models.
     */
    public void populateFilterResolvedInfo(ColumnResolvedFilterInfo visitableObj,
        FilterResolverMetadata metadata) throws FilterUnsupportedException {
      if (visitableObj instanceof DimColumnResolvedFilterInfo) {
        DimColumnResolvedFilterInfo resolveDimension = (DimColumnResolvedFilterInfo) visitableObj;
        ColumnFilterInfo resolvedFilterObject = null;
        List<String> evaluateResultListFinal = new ArrayList<>(1);
        try {
          // handling for is null case scenarios
          if (metadata.getExpression() instanceof EqualToExpression) {
            EqualToExpression expression = (EqualToExpression) metadata.getExpression();
            if (expression.isNull) {
              evaluateResultListFinal = new ArrayList<>(1);
              evaluateResultListFinal.add(CarbonCommonConstants.MEMBER_DEFAULT_VAL);
            }
          } else {
            evaluateResultListFinal = metadata.getExpression().evaluate(null).getListAsString();
          }
          // Adding default  null member inorder to not display the same while
          // displaying the report as per hive compatibility.
          if (!metadata.isIncludeFilter() && !evaluateResultListFinal
              .contains(CarbonCommonConstants.MEMBER_DEFAULT_VAL)) {
            evaluateResultListFinal.add(CarbonCommonConstants.MEMBER_DEFAULT_VAL);
          }
        } catch (FilterIllegalMemberException e) {
          throw new FilterUnsupportedException(e);
        }
        resolvedFilterObject = FilterUtil
            .getNoDictionaryValKeyMemberForFilter(evaluateResultListFinal, metadata.isIncludeFilter(),
                metadata.getColumnExpression().getDataType());
        resolveDimension.setFilterValues(resolvedFilterObject);
      }
    }
  }
  