| /* |
| * 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.scanner; |
| |
| import java.io.IOException; |
| |
| import org.apache.carbondata.core.datastore.DataRefNode; |
| import org.apache.carbondata.core.scan.expression.exception.FilterUnsupportedException; |
| import org.apache.carbondata.core.scan.processor.RawBlockletColumnChunks; |
| import org.apache.carbondata.core.scan.result.BlockletScannedResult; |
| |
| /** |
| * Interface for processing the block |
| * Processing can be filter based processing or non filter based processing |
| */ |
| public interface BlockletScanner { |
| |
| /** |
| * Checks whether this blocklet required to scan or not based on min max of each blocklet. |
| * @param dataBlock |
| * @return |
| * @throws IOException |
| */ |
| boolean isScanRequired(DataRefNode dataBlock); |
| |
| /** |
| * Below method will used to process the block data and get the scanned result |
| * |
| * @param rawBlockletColumnChunks block chunk which holds the block data |
| * @return scannerResult |
| * result after processing |
| */ |
| BlockletScannedResult scanBlocklet(RawBlockletColumnChunks rawBlockletColumnChunks) |
| throws IOException, FilterUnsupportedException; |
| |
| /** |
| * Just reads the blocklet from file, does not uncompress it. |
| * @param rawBlockletColumnChunks |
| */ |
| void readBlocklet(RawBlockletColumnChunks rawBlockletColumnChunks) throws IOException; |
| |
| } |