001/* 002 * Copyright 2006 - 2013 003 * Stefan Balev <stefan.balev@graphstream-project.org> 004 * Julien Baudry <julien.baudry@graphstream-project.org> 005 * Antoine Dutot <antoine.dutot@graphstream-project.org> 006 * Yoann Pigné <yoann.pigne@graphstream-project.org> 007 * Guilhelm Savin <guilhelm.savin@graphstream-project.org> 008 * 009 * This file is part of GraphStream <http://graphstream-project.org>. 010 * 011 * GraphStream is a library whose purpose is to handle static or dynamic 012 * graph, create them from scratch, file or any source and display them. 013 * 014 * This program is free software distributed under the terms of two licenses, the 015 * CeCILL-C license that fits European law, and the GNU Lesser General Public 016 * License. You can use, modify and/ or redistribute the software under the terms 017 * of the CeCILL-C license as circulated by CEA, CNRS and INRIA at the following 018 * URL <http://www.cecill.info> or under the terms of the GNU LGPL as published by 019 * the Free Software Foundation, either version 3 of the License, or (at your 020 * option) any later version. 021 * 022 * This program is distributed in the hope that it will be useful, but WITHOUT ANY 023 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A 024 * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. 025 * 026 * You should have received a copy of the GNU Lesser General Public License 027 * along with this program. If not, see <http://www.gnu.org/licenses/>. 028 * 029 * The fact that you are presently reading this means that you have had 030 * knowledge of the CeCILL-C and LGPL licenses and that you accept their terms. 031 */ 032package org.graphstream.util; 033 034import java.io.IOException; 035 036import org.graphstream.stream.SinkAdapter; 037import org.graphstream.stream.file.FileSource; 038import org.graphstream.stream.file.FileSourceFactory; 039 040/** 041 * Count the step of a stream. 042 */ 043public class StepCounter extends SinkAdapter { 044 /** 045 * Count step contains in a file. 046 * 047 * @param path 048 * path to the file 049 * @return count of step event in the file 050 * @throws IOException 051 * @see org.graphstream.stream.file.FileSourceFactory 052 */ 053 public static int countStepInFile(String path) throws IOException { 054 StepCounter counter = new StepCounter(); 055 FileSource source = FileSourceFactory.sourceFor(path); 056 057 source.addElementSink(counter); 058 source.readAll(path); 059 060 return counter.getStepCount(); 061 } 062 063 protected int step; 064 065 /** 066 * Default constructor. Count is set to zero. 067 */ 068 public StepCounter() { 069 reset(); 070 } 071 072 /** 073 * Reset the step count to zero. 074 */ 075 public void reset() { 076 step = 0; 077 } 078 079 /** 080 * Get the step count. 081 * 082 * @return the count of step 083 */ 084 public int getStepCount() { 085 return step; 086 } 087 088 /* 089 * (non-Javadoc) 090 * 091 * @see org.graphstream.stream.SinkAdapter#stepBegins(java.lang.String, 092 * long, double) 093 */ 094 public void stepBegins(String sourceId, long timeId, double time) { 095 step++; 096 } 097}