exec.java

The ElectricTM VLSI Design System is an open-source Electronic Design Automation (EDA) system that c

                // attach to input of process
                processWriter = new PrintWriter(p.getOutputStream());
            }

            // wait for exit status
            exitVal = p.waitFor();

            // also wait for redir threads to die, if doing redir
            if (outStreamRedir != null) outReader.join();
            if (errStreamRedir != null) errReader.join();

            StringBuffer com = new StringBuffer();
            if (command != null)
                com.append(command);
            else {
                for (int i=0; i<exec.length; i++)
                    com.append(exec[i]+" ");
            }

            //System.out.println("Process finished [exit: "+exitVal+"]: "+com.toString());
            synchronized(finishedListeners) {
                FinishedEvent e = new FinishedEvent(this, com.toString(), dir, exitVal);
                ArrayList<FinishedListener> copy = new ArrayList<FinishedListener>();
                // make copy cause listeners may want to remove themselves if process finished
                for (FinishedListener l : finishedListeners) {
                    copy.add(l);
                }
                for (FinishedListener l : copy) {
                    l.processFinished(e);
                }
            }

            synchronized(this) {
                if (processWriter != null) {
                    processWriter.close();
                    processWriter = null;
                }
            }

        } catch (Exception e) {
            ActivityLogger.logException(e);
        }
    }

    /**
     * Send a line of text to the process. This is not useful
     * if the process is not expecting any input.
     * @param line a line of text to send to the process
     */
    public void writeln(String line) {
        synchronized(this) {
            if (processWriter == null) {
                System.out.println("Can't write to process: No valid process running.");
                return;
            }
            processWriter.println(line);
            processWriter.flush();
        }
    }

    /**
     * Add a Exec.FinishedListener
     * @param a the listener
     */
    public void addFinishedListener(FinishedListener a) {
        synchronized(finishedListeners) {
            finishedListeners.add(a);
        }
    }

    /**
     * Remove a Exec.FinishedListener
     * @param a the listener
     */
    public void removeFinishedListener(FinishedListener a) {
        synchronized(finishedListeners) {
            finishedListeners.remove(a);
        }
    }

    /**
     * End this process, if it is running. Otherwise, does nothing
     */
    public synchronized void destroyProcess() {
        if (p != null) {
            p.destroy();
        }
    }

    public int getExitVal() { return exitVal; }

    /**
     * Check for a string passed to the OutputStream. All chars passed to
     * this class are also transparently passed to System.out.
     * This only checks for strings within a single line of text.
     * The strings are simple strings, not regular expressions.
     */
    public static class OutputStreamChecker extends OutputStream implements Serializable {
        private OutputStream ostream;
        private String checkFor;
        private StringBuffer lastLine;
        private char [] buf;
        private int bufOffset;
        private boolean found;
        private boolean regexp;             // if checkFor string is a regular expression
        private String foundLine;
        private File copyToFile;
        private PrintWriter out;
        private List<OutputStreamCheckerListener> listeners;
        private Exec exec = null;

        /**
         * Checks for string in output stream.  The string may span multiple lines, or may be contained
         * within a non-terminated line (such as an input query).
         * @param ostream send read data to this output stream (usually System.out)
         * @param checkFor the string to check for
         */
        public OutputStreamChecker(OutputStream ostream, String checkFor) {
            this(ostream, checkFor, false, null);
        }


        /**
         * Checks for string in output stream. String must be contained within one line.
         * @param ostream send read data to this output stream (usually System.out)
         * @param checkFor the string to check for
         * @param regexp if true, the string is considered a regular expression
         * @param copyToFile if non-null, the output is copied to this file
         */
        public OutputStreamChecker(OutputStream ostream, String checkFor, boolean regexp, File copyToFile) {
            this.ostream = ostream;
            this.checkFor = checkFor;
            this.regexp = regexp;
            lastLine = null;
            buf = null;
            bufOffset = 0;
            lastLine = new StringBuffer();
            if (!regexp)
                buf = new char[checkFor.length()];

            found = false;
            foundLine = null;
            out = null;
            this.copyToFile = copyToFile;
            if (copyToFile != null) {
                try {
                    out = new PrintWriter(new BufferedWriter(new FileWriter(this.copyToFile)));
                } catch (IOException e) {
                    System.out.println(e.getMessage());
                    out = null;
                }
            }
            listeners = new ArrayList<OutputStreamCheckerListener>();
        }

        public void write(int b) throws IOException {
            ostream.write(b);
            if (out != null) out.write(b);
            lastLine.append((char)b);
            if (regexp) {
                // match against regular expression on end-of-line
                if (b == '\n') {
                    if (lastLine.toString().matches(checkFor)) {
                        found = true;
                        foundLine = lastLine.toString();
                        alertListeners(foundLine);
                    }
                }
            } else {
                // store data in buffer of same length as string trying to match
                buf[bufOffset] = (char)b;
                bufOffset++;
                if (bufOffset >= buf.length) bufOffset = 0;
                // check against string. Since same length, when string is found bufOffset
                // will be at start of string.
                boolean matched = true;
                for (int i=0; i<buf.length; i++) {
                    int y = (i+bufOffset) % buf.length;
                    if (checkFor.charAt(i) != buf[y]) {
                        matched = false; break;
                    }
                }
                if (matched) {
                    found = true;
                    foundLine = lastLine.toString();
                    alertListeners(foundLine);
                }
            }
            if (b == '\n') {
                lastLine.delete(0, lastLine.length());
            }
        }

        public void addOutputStreamCheckerListener(OutputStreamCheckerListener l) {
            listeners.add(l);
        }
        public void removeOutputStreamCheckerListener(OutputStreamCheckerListener l) {
            listeners.remove(l);
        }
        private void alertListeners(String matched) {
            for (OutputStreamCheckerListener l : listeners) {
                l.matchFound(exec, matched);
            }
        }

        public boolean getFound() { return found; }
        public String getFoundLine() { return foundLine; }
        public void close() { if (out != null) out.close(); }
        public File getCopyToFile() { return copyToFile; }

        private void setExec(Exec e) { this.exec = e; }
    }

    /**
     * Interface for objects to be notified immediately when OutputStreamChecker
     * matches when it is looking for.
     */
    public interface OutputStreamCheckerListener {
        public void matchFound(Exec exec, String matched);
    }
}