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.Map;
  import java.util.Set;
  
  import org.apache.carbondata.core.scan.expression.conditional.ImplicitExpression;
  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 ImplicitColumnVisitor implements ResolvedFilterInfoVisitorIntf {
  
    /**
     * Visitor Method will update the filter related details in visitableObj, For implicit
     * 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 taken
     * 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.
     */
  
    @Override
    public void populateFilterResolvedInfo(ColumnResolvedFilterInfo visitableObj,
        FilterResolverMetadata metadata) throws FilterUnsupportedException {
      if (visitableObj instanceof DimColumnResolvedFilterInfo) {
        ColumnFilterInfo resolvedFilterObject = null;
        if (metadata.getExpression() instanceof ImplicitExpression) {
          Map<String, Set<Integer>> blockIdToBlockletIdMapping =
              ((ImplicitExpression) metadata.getExpression()).getBlockIdToBlockletIdMapping();
          resolvedFilterObject = FilterUtil
              .getImplicitColumnFilterList(blockIdToBlockletIdMapping, metadata.isIncludeFilter());
          ((DimColumnResolvedFilterInfo) visitableObj).setFilterValues(resolvedFilterObject);
        } else {
          throw new FilterUnsupportedException("Expression not an instance of implicit expression");
        }
      }
    }
  }
  