Webiyo

org/webiyo/util/Files.java

package org.webiyo.util;

import org.webiyo.web.HtmlWriter;
import org.webiyo.web.Renderable;

import java.io.*;

public class Files {

    private Files() {
    }

    public static void copyBytes(InputStream source, OutputStream dest) throws IOException {
        while (true) {
            int c = source.read();
            if (c == -1) break;
            dest.write(c);
        }
    }

    public static void copyBytes(InputStream source, File dest) throws IOException {
        OutputStream out = new FileOutputStream(dest);
        try {
            copyBytes(source, out);
        } finally {
            out.close();
        }
    }

    public static void copyChars(Reader source, Appendable dest) throws IOException {
        while (true) {
            int c = source.read();
            if (c == -1) break;
            dest.append((char) c);
        }
    }

    public static void deleteDir(File dir) throws IOException {
        for (File file : dir.listFiles()) {
            if (file.isDirectory()) {
                deleteDir(file);
            } else {
                if (!file.delete()) {
                    throw new IOException("unable to delete file: " + file.getAbsolutePath());
                }
            }
        }
        if (!dir.delete()) {
            throw new IOException("unable to delete directory: " + dir.getAbsolutePath());
        }
    }

    public static byte[] readBytes(File file) throws IOException {
        return readBytes(new FileInputStream(file));
    }

    public static byte[] readBytes(InputStream in) throws IOException {
        try {
            ByteArrayOutputStream result = new ByteArrayOutputStream();
            copyBytes(in, result);
            return result.toByteArray();
        } finally {
            in.close();
        }
    }

    public static String readString(File file) throws IOException {
        return readString(new FileInputStream(file));
    }

    public static String readString(InputStream is) throws IOException {
        return readString(new InputStreamReader(is));
    }

    public static String readString(Reader reader) throws IOException {
        try {
            StringBuilder result = new StringBuilder();
            copyChars(reader, result);
            return result.toString();
        } finally {
            reader.close();
        }
    }

    public static void mkdirs(File dirToCreate) throws IOException {
        dirToCreate.mkdirs();
        if (!dirToCreate.isDirectory()) {
            throw new IOException("can't create directory: " + dirToCreate.getPath());
        }
    }

    public static void writePage(Renderable page, File file) throws IOException {
        mkdirs(file.getParentFile());

        Writer out = new FileWriter(file);
        try {
            page.render(new HtmlWriter(out));
        } finally {
            out.close();
        }
    }
}