IOUtils.java

package org.codinjutsu.tools.jenkins.util;

import java.io.*;

/**
 * Extracted from commons-io (because of bloated size in compare to whole plugin)
 * maybe should somehow use streamlined jar?
 */
public class IOUtils {

    public static String toString(InputStream input) throws IOException {
        StringWriter sw = new StringWriter();
        copy(input, sw);
        return sw.toString();
    }

    public static String toString(InputStream input, String encoding) throws IOException {
        StringWriter sw = new StringWriter();
        copy(input, sw, encoding);
        return sw.toString();
    }

    public static void copy(InputStream input, Writer output, String encoding) throws IOException {
        if(encoding == null) {
            copy(input, output);
        } else {
            InputStreamReader in = new InputStreamReader(input, encoding);
            copy(in, output);
        }

    }

    public static void copy(InputStream input, Writer output) throws IOException {
        InputStreamReader in = new InputStreamReader(input);
        copy(in, output);
    }

    public static int copy(Reader input, Writer output) throws IOException {
        long count = copyLarge(input, output);
        return count > 2147483647L?-1:(int)count;
    }

    public static long copyLarge(Reader input, Writer output) throws IOException {
        char[] buffer = new char[4096];
        long count = 0L;

        int n1;
        for(; -1 != (n1 = input.read(buffer)); count += (long)n1) {
            output.write(buffer, 0, n1);
        }

        return count;
    }

}