| /* |
| * 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.segment.virtual; |
| |
| import com.google.common.base.Preconditions; |
| import org.apache.druid.query.dimension.DimensionSpec; |
| import org.apache.druid.segment.ColumnSelectorFactory; |
| import org.apache.druid.segment.ColumnValueSelector; |
| import org.apache.druid.segment.DimensionSelector; |
| import org.apache.druid.segment.VirtualColumns; |
| |
| /** |
| * {@link ColumnSelectorFactory} which can create selectors for both virtual and non-virtual columns |
| */ |
| public class VirtualizedColumnSelectorFactory extends VirtualizedColumnInspector implements ColumnSelectorFactory |
| { |
| private final ColumnSelectorFactory baseFactory; |
| |
| public VirtualizedColumnSelectorFactory( |
| ColumnSelectorFactory baseFactory, |
| VirtualColumns virtualColumns |
| ) |
| { |
| super(baseFactory, virtualColumns); |
| this.baseFactory = Preconditions.checkNotNull(baseFactory, "baseFactory"); |
| } |
| |
| @Override |
| public DimensionSelector makeDimensionSelector(DimensionSpec dimensionSpec) |
| { |
| if (virtualColumns.exists(dimensionSpec.getDimension())) { |
| return virtualColumns.makeDimensionSelector(dimensionSpec, baseFactory); |
| } else { |
| return baseFactory.makeDimensionSelector(dimensionSpec); |
| } |
| } |
| |
| @Override |
| public ColumnValueSelector<?> makeColumnValueSelector(String columnName) |
| { |
| if (virtualColumns.exists(columnName)) { |
| return virtualColumns.makeColumnValueSelector(columnName, baseFactory); |
| } else { |
| return baseFactory.makeColumnValueSelector(columnName); |
| } |
| } |
| } |