kungfu.algdesign.util.Utils.java Source code

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Here is the source code for kungfu.algdesign.util.Utils.java

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/*
 * Copyright (C) 2014 - present, Laszlo Csontos
 *
 * This program 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.
 * 
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 * 
 */

package kungfu.algdesign.util;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;

import com.google.common.primitives.Ints;
import com.google.common.primitives.Longs;

/**
 * @author lcsontos
 */
public class Utils {

    private Utils() {
    }

    public static InputStream getInputStreamForResource(String name) {
        ClassLoader classLoader = Thread.currentThread().getContextClassLoader();

        return classLoader.getResourceAsStream(name);
    }

    public static int[] getIntArray(InputStream inputStream) throws IOException {
        InputStreamReader inputStreamReader = new InputStreamReader(inputStream);

        BufferedReader bufferedReader = new BufferedReader(inputStreamReader);

        List<Integer> integerList = new ArrayList<>();

        String line = null;

        while ((line = bufferedReader.readLine()) != null) {
            integerList.add(Integer.valueOf(line));
        }

        return Ints.toArray(integerList);
    }

    public static Integer[] getIntegerArray(InputStream inputStream) throws IOException {
        List<Integer> integerList = getIntegerList(inputStream);

        Integer[] integerArray = new Integer[integerList.size()];

        return integerList.toArray(integerArray);
    }

    public static List<Integer> getIntegerList(InputStream inputStream) throws IOException {
        InputStreamReader inputStreamReader = new InputStreamReader(inputStream);

        BufferedReader bufferedReader = new BufferedReader(inputStreamReader);

        List<Integer> integerList = new LinkedList<>();

        String line = null;

        while ((line = bufferedReader.readLine()) != null) {
            integerList.add(Integer.valueOf(line));
        }

        return integerList;
    }

    public static long[] getLongArray(InputStream inputStream) throws IOException {
        InputStreamReader inputStreamReader = new InputStreamReader(inputStream);

        BufferedReader bufferedReader = new BufferedReader(inputStreamReader);

        List<Long> longList = new ArrayList<>();

        String line = null;

        while ((line = bufferedReader.readLine()) != null) {
            longList.add(Long.valueOf(line));
        }

        return Longs.toArray(longList);
    }

}