| /* |
| * 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.druid.query; |
| |
| import org.apache.druid.query.dimension.ColumnSelectorStrategy; |
| import org.apache.druid.segment.ColumnValueSelector; |
| |
| /** |
| * A grouping of various related objects used during query processing for a single dimension, used for convenience. |
| * |
| * Each ColumnSelectorPlus is associated with a single dimension. |
| */ |
| public class ColumnSelectorPlus<ColumnSelectorStrategyClass extends ColumnSelectorStrategy> |
| { |
| /** |
| * Helper object that handles row value operations that pertain to a specific query type for this |
| * dimension within query processing engines. |
| */ |
| private final ColumnSelectorStrategyClass columnSelectorStrategy; |
| |
| /** |
| * Internal name of the dimension. |
| */ |
| private final String name; |
| |
| /** |
| * Name of the dimension to be returned in query results. |
| */ |
| private final String outputName; |
| |
| /** |
| * ColumnValueSelector for this dimension, e.g. a DimensionSelector for String dimensions. |
| */ |
| private final ColumnValueSelector selector; |
| |
| public ColumnSelectorPlus( |
| String columnName, |
| String outputName, |
| ColumnSelectorStrategyClass columnSelectorStrategy, |
| ColumnValueSelector selector |
| ) |
| { |
| this.columnSelectorStrategy = columnSelectorStrategy; |
| this.name = columnName; |
| this.outputName = outputName; |
| this.selector = selector; |
| } |
| |
| public ColumnSelectorStrategyClass getColumnSelectorStrategy() |
| { |
| return columnSelectorStrategy; |
| } |
| |
| public String getName() |
| { |
| return name; |
| } |
| |
| public String getOutputName() |
| { |
| return outputName; |
| } |
| |
| public ColumnValueSelector getSelector() |
| { |
| return selector; |
| } |
| } |