Java example source code file (JarTest.java)

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Java - Java tags/keywords

bufferedoutputstream, bufferedreader, bytearrayoutputstream, exception, file, fileoutputstream, inputstream, ioexception, jar, jartest, net, network, printstream, redirector, runnable, string

The JarTest.java Java example source code

/*
 * Copyright (c) 2005, 2007, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

import java.io.*;
import java.net.*;
import java.util.jar.*;

public abstract class JarTest
{
        static String tmpdir = System.getProperty("java.io.tmpdir");
        static String javaCmd = System.getProperty("java.home") + File.separator +
                                "bin" + File.separator + "java";

        /**
         * Reads an input stream into a byte array.
         */
        protected byte[] readFully(InputStream in) throws Exception {
                ByteArrayOutputStream out = new ByteArrayOutputStream();
                byte[] buffer = new byte[32];
                int count;

                while ((count = in.read(buffer)) >= 0) {
                        out.write(buffer, 0, count);
                }

                return out.toByteArray();
        }

        /**
         * Copies the named resource into the directory specified.
         */
        protected File copyResource(File dir, String resName) throws Exception {
                BufferedOutputStream buffOut = null;
                FileOutputStream fileOut;
                InputStream in = null;
                File file = null;
                byte[] buffer;
                int count;

                file = new File(dir, resName);
                try {
                    fileOut = new FileOutputStream(file);
                    buffOut = new BufferedOutputStream(fileOut);
                    in = getClass().getResourceAsStream(resName);
                    buffer = new byte[1024];

                    while ((count = in.read(buffer)) >= 0) {
                            buffOut.write(buffer, 0, count);
                    }
                    buffOut.flush();
                } finally {
                    if (buffOut != null) {
                        try {
                            buffOut.close();
                        } catch (IOException e) {
                        }
                    }
                    if (in != null) {
                        try {
                            in.close();
                        }  catch (IOException e) {
                        }
                    }
                }

                return file;
        }

        /**
         * Utility to create a temp dir.
         */
        protected File createTempDir() throws Exception {
                File result = new File(tmpdir  + File.separator + getClass().getName());
                result.delete();
                result.mkdirs();

                return result;
        }

        /**
         * Utility to recursively delete a directory.
         */
        protected  boolean deleteRecursively(File file) {
                File[] children;
                boolean result = true;

                children = file.listFiles();
                if (children != null) {
                        for (int i=0; i<children.length; i++) {
                                result = result && deleteRecursively(children[i]);
                        }
                }
                result = result && file.delete();

                return result;
        }

    static class Redirector implements Runnable
    {
        private BufferedReader reader;
        private PrintStream out;
        private boolean hasReadData;

        public Redirector(BufferedReader reader, PrintStream out) {
            this.reader = reader;
            this.out = out;
        }

        public void run() {
            String str;
            try {
                while ((str = reader.readLine()) != null) {
                    hasReadData = true;
                    out.println(str);
                }
            } catch (IOException ioe) {
                ioe.printStackTrace();
            }
        }

        public boolean getHasReadData() {
            return hasReadData;
        }
    }

}