Examples of java.io.FileInputStream.available()

java.io.FileInputStream.available()
Returns an estimate of the number of remaining bytes that can be read (or skipped over) from this input stream without blocking by the next invocation of a method for this input stream. The next invocation might be the same thread or another thread. A single read or skip of this many bytes will not block, but may read or skip fewer bytes.
In some cases, a non-blocking read (or skip) may appear to be blocked when it is merely slow, for example when reading large files over slow networks. @return an estimate of the number of remaining bytes that can be read(or skipped over) from this input stream without blocking. @exception IOException if this file input stream has been closed by calling{@code close} or an I/O error occurs.

            
            String cmd = "-T" + getDotFormat() + " \"" + dotSrc.getCanonicalPath() + "\" -o\"" + dotImg.getAbsolutePath() + "\"";
            Dot.run(cmd);
            
            InputStream is = new FileInputStream(dotImg);
            if (is.available() == 0) {
                throw new Exception("Error while rendering dot file");
            }
            response.setContentType(getContentType());
            response.setContentLength(is.available());
            FileUtil.copyInputStream(is, response.getOutputStream());

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            InputStream is = new FileInputStream(dotImg);
            if (is.available() == 0) {
                throw new Exception("Error while rendering dot file");
            }
            response.setContentType(getContentType());
            response.setContentLength(is.available());
            FileUtil.copyInputStream(is, response.getOutputStream());
        } finally {
            if (dotSrc != null) {
                //dotSrc.delete();
            }

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        };


    private void checkFile(File file) {
        try {
            FileInputStream fis = new FileInputStream(file);
            byte[] bytes = new byte[fis.available()];
            fis.read(bytes);
            String content = new String(bytes);


            for (int i = 0; i < avoidPatterns.length; i++) {
                if (avoidPatterns[i].noMatch(file.getPath(), content)) {

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            Class c = (Class) cache.get(classname);
            if (c == null) {
                try {
                    File file = getClassFile(classname);
                    FileInputStream fis = new FileInputStream(file);
                    byte[] data = new byte[fis.available()];
                    fis.read(data);
                    fis.close();
                    c = defineClass(classname, data, 0, data.length);
                    dates.put(classname, new Long(file.lastModified()));
                } catch (Throwable t) {

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        FileCacheInfo finfo = (FileCacheInfo) cache.get(file);
        long lastmod = file.lastModified();
        if (finfo == null || finfo.lastModified != lastmod) {
            FileInputStream fis = new FileInputStream(file);
            byte[] content = new byte[fis.available()];
            fis.read(content);
            fis.close();
            finfo = new FileCacheInfo(file, lastmod, content);
            cache.put(file, finfo);
            return content;

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      dstream.writeBytes("Content-Type: image/jpeg\r\n");


      dstream.writeBytes("Content-Transfer-Encoding: binary\r\n\r\n");


      int bytesAvailable = fileInputStream.available();


      int maxBufferSize = 1024;
      int bufferSize = Math.min(bytesAvailable, maxBufferSize);


      byte[] buffer = new byte[bufferSize];

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      int bytesRead = fileInputStream.read(buffer, 0, bufferSize);


      while (bytesRead > 0) {
        dstream.write(buffer, 0, bufferSize);
        bytesAvailable = fileInputStream.available();
        bufferSize = Math.min(bytesAvailable, maxBufferSize);
        bytesRead = fileInputStream.read(buffer, 0, bufferSize);


      }

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     *     excpected number of parameters (in the source code).
     */
    private void checkMessages(File file) {
        try {
            FileInputStream fis = new FileInputStream(file);
            byte[] bytes = new byte[fis.available()];
            fis.read(bytes);
            String string = new String(bytes);
            int index = string.indexOf("JavaUtils.getMessage(");
            while (index >= 0) {

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        };


    private void checkFile(File file) {
        try {
            FileInputStream fis = new FileInputStream(file);
            byte[] bytes = new byte[fis.available()];
            fis.read(bytes);
            String content = new String(bytes);


            for (int i = 0; i < avoidPatterns.length; i++) {
                if (avoidPatterns[i].noMatch(file.getPath(), content)) {

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            throw new CertificateStoreException("No certificate with serial number "+sNo+" found.");
        }
        FileInputStream fin;
        try {
            fin = new FileInputStream(certFile);
            byte[] data = new byte[fin.available()];
            fin.read(data);
            fin.close();
            return new String(data);
        } catch (Exception e) {
            throw new CertificateStoreException("Error while retrieving certificate.", e);

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