| /* |
| * 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.flink.test.util; |
| |
| import org.apache.flink.api.common.io.DelimitedInputFormat; |
| import org.apache.flink.api.java.tuple.Tuple2; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * Generates records with an id and a and CoordVector. The input format is line-based, i.e. one |
| * record is read from one line which is terminated by '\n'. Within a line the first '|' character |
| * separates the id from the CoordVector. The vector consists of a vector of decimals. The decimals |
| * are separated by '|' as well. The id is the id of a data point or cluster center and the |
| * CoordVector the corresponding position (coordinate vector) of the data point or cluster center. |
| * Example line: "42|23.23|52.57|74.43| Id: 42 Coordinate vector: (23.23, 52.57, 74.43) |
| */ |
| public class PointInFormat extends DelimitedInputFormat<Tuple2<Integer, CoordVector>> { |
| private static final long serialVersionUID = 1L; |
| |
| private final List<Double> dimensionValues = new ArrayList<Double>(); |
| private double[] pointValues = new double[0]; |
| |
| @Override |
| public Tuple2<Integer, CoordVector> readRecord( |
| Tuple2<Integer, CoordVector> reuse, byte[] bytes, int offset, int numBytes) |
| throws IOException { |
| |
| final int limit = offset + numBytes; |
| |
| int id = -1; |
| int value = 0; |
| int fractionValue = 0; |
| int fractionChars = 0; |
| boolean negative = false; |
| |
| this.dimensionValues.clear(); |
| |
| for (int pos = offset; pos < limit; pos++) { |
| if (bytes[pos] == '|') { |
| // check if id was already set |
| if (id == -1) { |
| id = value; |
| } else { |
| double v = |
| value |
| + ((double) fractionValue) |
| * Math.pow(10, (-1 * (fractionChars - 1))); |
| this.dimensionValues.add(negative ? -v : v); |
| } |
| // reset value |
| value = 0; |
| fractionValue = 0; |
| fractionChars = 0; |
| negative = false; |
| } else if (bytes[pos] == '.') { |
| fractionChars = 1; |
| } else if (bytes[pos] == '-') { |
| negative = true; |
| } else { |
| if (fractionChars == 0) { |
| value *= 10; |
| value += bytes[pos] - '0'; |
| } else { |
| fractionValue *= 10; |
| fractionValue += bytes[pos] - '0'; |
| fractionChars++; |
| } |
| } |
| } |
| |
| // set the ID |
| reuse.f0 = id; |
| |
| // set the data points |
| if (this.pointValues.length != this.dimensionValues.size()) { |
| this.pointValues = new double[this.dimensionValues.size()]; |
| } |
| for (int i = 0; i < this.pointValues.length; i++) { |
| this.pointValues[i] = this.dimensionValues.get(i); |
| } |
| |
| reuse.f1 = new CoordVector(this.pointValues); |
| return reuse; |
| } |
| } |