edu.cmu.cs.lti.ark.util.FileUtil.java Source code

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Here is the source code for edu.cmu.cs.lti.ark.util.FileUtil.java

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/*******************************************************************************
 * Copyright (c) 2011 Dipanjan Das 
 * Language Technologies Institute, 
 * Carnegie Mellon University, 
 * All Rights Reserved.
 * 
 * FileUtil.java is part of SEMAFOR 2.0.
 * 
 * SEMAFOR 2.0 is free software: you can redistribute it and/or modify  it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or 
 * (at your option) any later version.
 * 
 * SEMAFOR 2.0 is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details. 
 * 
 * You should have received a copy of the GNU General Public License along
 * with SEMAFOR 2.0.  If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/
package edu.cmu.cs.lti.ark.util;

import com.google.common.base.Charsets;
import com.google.common.io.CharStreams;
import com.google.common.io.Files;
import com.google.common.io.InputSupplier;
import com.google.common.io.LineProcessor;

import java.util.*;
import java.io.*;

public class FileUtil {
    public static final LineProcessor<Integer> LINE_COUNTER = new LineProcessor<Integer>() {
        int lineCount = 0;

        @Override
        public boolean processLine(String line) throws IOException {
            lineCount++;
            return true;
        }

        @Override
        public Integer getResult() {
            return lineCount;
        }
    };

    public static Scanner openInFile(String filename) {
        Scanner localsc = null;
        try {
            localsc = new Scanner(new FileInputStream(filename));

        } catch (IOException ioe) {
            // TODO: NO! stop swallowing exceptions
            System.out.println(ioe.getMessage());
        }
        return localsc;
    }

    public static PrintStream openOutFile(String filename) {
        PrintStream localps = null;
        try {
            localps = new PrintStream(new FileOutputStream(filename));

        } catch (IOException ioe) {
            // TODO: NO! stop swallowing exceptions
            System.out.println(ioe.getMessage());
        }
        return localps;
    }

    public static int countLines(String filename) throws IOException {
        return countLines(Files.newReaderSupplier(new File(filename), Charsets.UTF_8));
    }

    public static int countLines(InputSupplier<InputStreamReader> inputSupplier) throws IOException {
        return CharStreams.readLines(inputSupplier, LINE_COUNTER);
    }
}