Java BufferedReader Create getBufferedReaderMaybeGZ(String f)

Description

get Buffered Reader Maybe GZ

License

Open Source License

Parameter

Parameter	Description
filename	a parameter

Return

the buffered reader for the file with filename. Accepts gzipped and normal files, returning the gzipped file if and only if the normal file doesn't exist (and the gzipped version does).

Declaration

public static BufferedReader getBufferedReaderMaybeGZ(String f)

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.io.BufferedReader;
import java.io.File;

import java.io.FileInputStream;

import java.io.InputStream;
import java.io.InputStreamReader;

import java.util.zip.GZIPInputStream;

public class Main {
    /**//from  w  ww .  j  av  a2 s .c  o m
     * @param filename
     * @return the buffered reader for the file with filename.  Accepts gzipped
     * and normal files, returning the gzipped file if and only if the normal
     * file doesn't exist (and the gzipped version does).
     */
    public static BufferedReader getBufferedReaderMaybeGZ(String f) {
        /*
         * Moved here from machinereading/.../sri/util/FileMan.
         * This could be combined with getReaderFromGzippedFile (but make sure
         * it is backwards compatible with its original users).
         * - NLE 5/20/11
         */
        try {
            InputStream is;

            if (!new File(f).exists() && new File(f + ".gz").exists()) {
                f += ".gz"; //
            }

            FileInputStream fis = new FileInputStream(f);
            if (f.toLowerCase().endsWith(".gz")) {
                is = new GZIPInputStream(fis);
            } else {
                is = fis;
            }
            InputStreamReader reader = new InputStreamReader(is, "UTF8");
            BufferedReader lreader = new BufferedReader(reader);
            return lreader;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
}