Java tutorial
/** * Tencent is pleased to support the open source community by making TDW available. * Copyright (C) 2014 THL A29 Limited, a Tencent company. All rights reserved. * Licensed 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. */ import org.apache.hadoop.conf.Configuration; import FormatStorage.FormatDataFile; import FormatStorage.Unit.FieldValue; import FormatStorage.Unit.Record; public class ReadIndexFileTest { static void readtest() throws Exception { String filename = "/tmp/output/part-00000"; FormatDataFile fdf = new FormatDataFile(new Configuration()); fdf.open(filename); for (int i = 0; i < 5000; i++) { Record rec = fdf.getRecordByLine(i); rec.show(); } fdf.close(); } static void readvaluetest() throws Exception { String filename = "/tmp/output/part-00000"; FormatDataFile fdf = new FormatDataFile(new Configuration()); fdf.open(filename); FieldValue[] values = new FieldValue[2]; values[0] = new FieldValue((byte) 100, (short) 0); values[1] = new FieldValue((short) -4078, (short) 1); Record[] recs = fdf.getRecordByValue(values, 100); System.out.println(recs.length); for (int i = 0; i < recs.length; i++) { recs[i].show(); } } public static void main(String[] args) throws Exception { readtest(); } }