package fixjava;

public class StringUtils {

	/** Repeat the given string the requested number of times. */
	public static String repeat(String str, int numTimes) {
		StringBuilder buf = new StringBuilder(Math.max(0, str.length() * numTimes));
		for (int i = 0; i < numTimes; i++)
			buf.append(str);
		return buf.toString();
	}

	/**
	 * Pad the left hand side of a field with the given character. Always adds at least one pad character. If the length of str is
	 * greater than numPlaces-1, then the output string will be longer than numPlaces.
	 */
	public static String padLeft(String str, char padChar, int numPlaces) {
		int bufSize = Math.max(numPlaces, str.length() + 1);
		StringBuilder buf = new StringBuilder(Math.max(numPlaces, str.length() + 1));
		buf.append(padChar);
		for (int i = 1, mi = bufSize - str.length(); i < mi; i++)
			buf.append(padChar);
		buf.append(str);
		return buf.toString();
	}

	/**
	 * Pad the right hand side of a field with the given character. Always adds at least one pad character. If the length of str is
	 * greater than numPlaces-1, then the output string will be longer than numPlaces.
	 */
	public static String padRight(String str, char padChar, int numPlaces) {
		int bufSize = Math.max(numPlaces, str.length() + 1);
		StringBuilder buf = new StringBuilder(Math.max(numPlaces, str.length() + 1));
		buf.append(str);
		buf.append(padChar);
		while (buf.length() < bufSize)
			buf.append(padChar);
		return buf.toString();
	}

	/** Intern all strings in an array, skipping null elements. */
	public static String[] intern(String[] arr) {
		for (int i = 0; i < arr.length; i++)
			arr[i] = arr[i].intern();
		return arr;
	}

	/** Intern a string, ignoring null */
	public static String intern(String str) {
		return str == null ? null : str.intern();
	}

}

package fixjava;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;

public class IOUtils {

	public static void writeLinesToFile(List<String> lineList, File outputFile) {
		try {
			PrintWriter writer = new PrintWriter(outputFile);
			for (String line : lineList)
				writer.println(line);
			writer.close();
		} catch (FileNotFoundException e) {
			throw new RuntimeException(e);
		}
	}

	public static void writeLinesToFile(List<String> lineList, String outputFilename) {
		writeLinesToFile(lineList, new File(outputFilename));
	}

	// ---------------------------------------------------------------------------------------------------------

	public static ArrayList<String> readLinesFromFile(File inputFile) {
		ArrayList<String> lines = new ArrayList<>();
		for (String line : new FileLineIterator(inputFile))
			lines.add(line);
		return lines;
	}

	public static ArrayList<String> readLinesFromFile(String inputFilename) {
		return readLinesFromFile(new File(inputFilename));
	}

	// ---------------------------------------------------------------------------------------------------------

	public static String readFileAsString(File inputFile) {
		int len = (int) inputFile.length() + 1;
		StringBuilder buf = new StringBuilder(len);
		for (String line : new FileLineIterator(inputFile)) {
			buf.append(line);
			buf.append('\n');
		}
		return buf.toString();
	}

	public static String readFileAsString(String inputFilename) {
		return readFileAsString(new File(inputFilename));
	}
}
