package loop;

import java.io.*;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Collection;

import java.util.List;

/**

* IO Utils. Copied most of this code from commons-io.

*

* @author dhanji@gmail.com (Dhanji R. Prasanna)

*/

public class Util {

private static final int DEFAULT_BUFFER_SIZE = 4 * 1024;

public static String toString(InputStream input) throws IOException {

StringWriter out = new StringWriter();

Reader in = new InputStreamReader(input);

char[] buffer = new char[DEFAULT_BUFFER_SIZE];

int n;

while (-1 != (n = in.read(buffer))) {

out.write(buffer, 0, n);

}

return out.toString();

}

public static List<String> toLines(Reader input) throws IOException {

BufferedReader reader = new BufferedReader(input);

List<String> list = new ArrayList<String>();

String line = reader.readLine();

while (line != null) {

list.add(line);

line = reader.readLine();

}

return list;

}

public static void writeFile(File file, String text) throws IOException {

FileWriter fileWriter = new FileWriter(file);

try {

fileWriter.write(text);

} finally {

fileWriter.close();

}

}

/**

* Non-recursive list of files (only) in dir.

*/

public static Collection<File> listFiles(File directory, final String[] extensions) {

return Arrays.asList(directory.listFiles(new FilenameFilter() {

@Override public boolean accept(File file, String s) {

if (file.isDirectory())

return false;

for (String extension : extensions) {

if (file.getName().endsWith(extension))

return true;

}

return false;

}

}));

}

}