| /* |
| * 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.io.IOException; |
| import java.util.Collections; |
| import java.util.List; |
| |
| import org.apache.carbondata.core.constants.CarbonCommonConstants; |
| import org.apache.carbondata.core.scan.executor.exception.QueryExecutionException; |
| 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 DictionaryColumnVisitor implements ResolvedFilterInfoVisitorIntf { |
| |
| /** |
| * This Visitor method is used to populate the visitableObj with direct dictionary filter details |
| * where the filters values will be resolve using dictionary cache. |
| * |
| * @param visitableObj |
| * @param metadata |
| * @throws FilterUnsupportedException,if exception occurs while evaluating |
| * filter models. |
| * @throws IOException |
| * @throws FilterUnsupportedException |
| */ |
| public void populateFilterResolvedInfo(ColumnResolvedFilterInfo visitableObj, |
| FilterResolverMetadata metadata) throws FilterUnsupportedException, IOException { |
| if (visitableObj instanceof DimColumnResolvedFilterInfo) { |
| DimColumnResolvedFilterInfo resolveDimension = (DimColumnResolvedFilterInfo) visitableObj; |
| ColumnFilterInfo resolvedFilterObject = null; |
| List<String> evaluateResultListFinal; |
| try { |
| evaluateResultListFinal = metadata.getExpression().evaluate(null).getListAsString(); |
| } catch (FilterIllegalMemberException e) { |
| throw new FilterUnsupportedException(e); |
| } |
| try { |
| |
| resolvedFilterObject = FilterUtil |
| .getFilterValues(metadata.getTableIdentifier(), metadata.getColumnExpression(), |
| evaluateResultListFinal, metadata.isIncludeFilter()); |
| if (!metadata.isIncludeFilter() && null != resolvedFilterObject) { |
| // Adding default surrogate key of null member inorder to not display the same while |
| // displaying the report as per hive compatibility. |
| // first check of surrogate key for null value is already added then |
| // no need to add again otherwise result will be wrong in case of exclude filter |
| // this is because two times it will flip the same bit |
| if (!resolvedFilterObject.getExcludeFilterList() |
| .contains(CarbonCommonConstants.MEMBER_DEFAULT_VAL_SURROGATE_KEY)) { |
| resolvedFilterObject.getExcludeFilterList() |
| .add(CarbonCommonConstants.MEMBER_DEFAULT_VAL_SURROGATE_KEY); |
| } |
| Collections.sort(resolvedFilterObject.getExcludeFilterList()); |
| } |
| } catch (QueryExecutionException e) { |
| throw new FilterUnsupportedException(e); |
| } |
| resolveDimension.setFilterValues(resolvedFilterObject); |
| } |
| } |
| } |