Java BufferedReader Read loadQueryNodeInfo(String input_file)

Description

load Query Node Info

License

Apache License

Declaration

public static String loadQueryNodeInfo(String input_file)
            throws Exception 

Method Source Code

//package com.java2s;
/***********************************************************************
 PEGASUS: Peta-Scale Graph Mining System
 Authors: U Kang, Duen Horng Chau, and Christos Faloutsos

 This software is licensed under 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.//from   w w  w  . ja v a 2s.c  om
 -------------------------------------------------------------------------
 File: PegasusUtils.java
 - Common utility classes and functions
 Version: 2.0
 ***********************************************************************/

import java.io.*;

public class Main {
    public static String loadQueryNodeInfo(String input_file)
            throws Exception {
        String cur_line = "";
        int query_count = 0;
        long[] query_nodes = null;
        double[] query_weights = null;
        double sum_weights = 0;
        String query_str = "";

        try {
            BufferedReader in = new BufferedReader(new InputStreamReader(
                    new FileInputStream(input_file), "UTF8"));

            while (cur_line != null) {
                cur_line = in.readLine();
                if (cur_line.length() > 0) {
                    String[] tokens = cur_line.split("\t");
                    query_nodes[query_count] = Long.parseLong(tokens[0]);
                    query_weights[query_count] = Double
                            .parseDouble(tokens[1]);

                    sum_weights += query_weights[query_count];

                    query_count++;
                }
            }
        } catch (UnsupportedEncodingException e) {
        } catch (IOException e) {
        }

        System.out.println("loadQueryNodeInfo: total " + query_count
                + " queries read.");

        // normalize
        for (int i = 0; i < query_count; i++) {
            query_weights[i] /= sum_weights;

            query_str += ("" + query_nodes[i] + " " + query_weights[i]);
            if (i != query_count - 1)
                query_str += " ";
        }

        return query_str;
    }
}

Related

1. loadNumUsers(String fileName)
2. loadPartitions(String fileName)
3. loadPathPreferencesFromFile(File inputFile)
4. loadPrivateKeyFile(File privateKeyFile)
5. loadQueryFromFile(String queryFile)
6. loadReaderFromClasspath(Class c, String filename)
7. loadReaderToList(Reader reader)
8. loadRealDataGraphFromEmbers(String fileName, String splitter)
9. loadSentences(InputStream stream, List jsonSentences)