Example usage for java.nio CharBuffer allocate

Introduction

In this page you can find the example usage for java.nio CharBuffer allocate.

Prototype

public static CharBuffer allocate(int capacity) 

Source Link

Document

Creates a char buffer based on a newly allocated char array.

Usage

From source file:org.lockss.plugin.clockss.wolterskluwer.TestRewritingReader.java

public void testEmptyReader() throws Exception {
    // Also test that asking for input after EOF doesn't throw
    LineRewritingReader rr = null;//from www .j a  v  a  2 s. co m
    char[] buf = new char[64];
    CharBuffer cb = CharBuffer.allocate(64);

    // Using read()
    try {
        rr = new StringRewritingReader("");
        assertEquals(-1, rr.read());
        assertEquals(-1, rr.read());
    } finally {
        IOUtils.closeQuietly(rr);
    }

    // Using read(char[])
    try {
        rr = new StringRewritingReader("");
        assertEquals(-1, rr.read(buf));
        assertEquals(-1, rr.read(buf));
    } finally {
        IOUtils.closeQuietly(rr);
    }

    // Using read(char[],int,int)
    try {
        rr = new StringRewritingReader("");
        assertEquals(-1, rr.read(buf, 12, 34));
        assertEquals(-1, rr.read(buf, 12, 34));
    } finally {
        IOUtils.closeQuietly(rr);
    }

    // Using read(CharBuffer)
    try {
        rr = new StringRewritingReader("");
        assertEquals(-1, rr.read(cb));
        assertEquals(-1, rr.read(cb));
    } finally {
        IOUtils.closeQuietly(rr);
    }
}

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From source file:org.marketcetera.util.unicode.ReaderTest.java

@Test
public void regularReader() throws Exception {
    CloseableRegistry r = new CloseableRegistry();
    try {//from  www.jav a  2  s  .c o m
        ByteArrayInputStream is = new ByteArrayInputStream(HELLO_EN_NAT);
        r.register(new InputStreamWrapper(is));
        UnicodeInputStreamReader reader = new UnicodeInputStreamReader(is);
        r.register(new ReaderWrapper(reader));

        assertNull(reader.getDecodingStrategy());
        assertNull(reader.getRequestedSignatureCharset());
        assertNull(reader.getSignatureCharset());

        assertTrue(reader.ready());

        assertFalse(reader.markSupported());

        try {
            reader.mark(0);
            fail();
        } catch (IOException ex) {
            // Desired.
        }

        try {
            reader.reset();
            fail();
        } catch (IOException ex) {
            // Desired.
        }

        assertEquals(HELLO_EN.charAt(0), reader.read());

        assertEquals(1, reader.skip(1));

        char[] charArray = new char[1];
        assertEquals(1, reader.read(charArray));
        assertEquals(HELLO_EN.charAt(2), charArray[0]);

        charArray = new char[3];
        assertEquals(1, reader.read(charArray, 1, 1));
        assertEquals(HELLO_EN.charAt(3), charArray[1]);

        CharBuffer charBuffer = CharBuffer.allocate(10);
        assertEquals(1, reader.read(charBuffer));
        assertEquals(HELLO_EN.charAt(4), charBuffer.get(0));

        assertEquals(-1, reader.read());
        assertEquals(-1, reader.read(charArray));
        assertEquals(-1, reader.read(charArray, 1, 1));
        assertEquals(-1, reader.read(charBuffer));
        assertFalse(reader.ready());

        reader.close();
        reader.close();

        // Ensure that close() has closed the stream, by trying to
        // read from the reader: this is not testing whether
        // read() fails; it tests whether close() worked.
        try {
            reader.read();
            fail();
        } catch (IOException ex) {
            // Desired.
        }

        try {
            reader.ready();
            fail();
        } catch (IOException ex) {
            // Desired.
        }
    } finally {
        r.close();
    }
}

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From source file:org.marketcetera.util.unicode.ReaderTest.java

@Test
public void emptyReader() throws Exception {
    CloseableRegistry r = new CloseableRegistry();
    r = new CloseableRegistry();
    try {/*  w  w w.  j av  a2 s  .c  o  m*/
        ByteArrayInputStream is = new ByteArrayInputStream(ArrayUtils.EMPTY_BYTE_ARRAY);
        r.register(new InputStreamWrapper(is));
        UnicodeInputStreamReader reader = new UnicodeInputStreamReader(is);
        r.register(new ReaderWrapper(reader));

        assertNull(reader.getDecodingStrategy());
        assertNull(reader.getRequestedSignatureCharset());
        assertNull(reader.getSignatureCharset());

        assertFalse(reader.ready());

        assertFalse(reader.markSupported());

        try {
            reader.mark(0);
            fail();
        } catch (IOException ex) {
            // Desired.
        }

        try {
            reader.reset();
            fail();
        } catch (IOException ex) {
            // Desired.
        }

        assertEquals(-1, reader.read());

        char[] charArray = new char[1];
        assertEquals(-1, reader.read(charArray));

        charArray = new char[3];
        assertEquals(-1, reader.read(charArray, 1, 1));

        CharBuffer charBuffer = CharBuffer.allocate(10);
        assertEquals(-1, reader.read(charBuffer));

        reader.close();
        reader.close();

        // Ensure that close() has closed the stream, by trying to
        // read from the reader: this is not testing whether
        // read() fails; it tests whether close() worked.
        try {
            reader.read();
            fail();
        } catch (IOException ex) {
            // Desired.
        }

        try {
            reader.ready();
            fail();
        } catch (IOException ex) {
            // Desired.
        }
    } finally {
        r.close();
    }
}

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From source file:org.openbel.framework.ws.utils.Converter.java

private static Byte encode(final CharsetEncoder encoder, final char c) {
    encoder.reset();//from   ww  w .jav  a  2  s. c o m
    if (!encoder.canEncode(c)) {
        return null;
    }
    encoder.reset();
    ByteBuffer buffer = ByteBuffer.allocate(1);
    CharBuffer charBuffer = CharBuffer.allocate(1).put(c);
    charBuffer.flip();
    CoderResult result = null;

    result = encoder.encode(charBuffer, buffer, false);
    if (!result.isUnderflow()) {
        return null;
    }
    result = encoder.encode(charBuffer, buffer, true);
    if (result.isMalformed() || result.isUnmappable()) {
        return null;
    }
    result = encoder.flush(buffer);
    if (!result.isUnderflow()) {
        return null;
    }
    buffer.flip();
    return buffer.get(0);
}

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From source file:org.openhab.binding.lutron.internal.net.TelnetSession.java

public TelnetSession() {
    this.telnetClient = new TelnetClient();
    this.charBuffer = CharBuffer.allocate(BUFSIZE);

    this.telnetClient.setReaderThread(true);
    this.telnetClient.registerInputListener(new TelnetInputListener() {
        @Override// w w  w .  j a  va 2 s.c  om
        public void telnetInputAvailable() {
            try {
                readInput();
            } catch (IOException e) {
                notifyInputError(e);
            }
        }
    });
}

---

From source file:org.paxle.core.doc.impl.AParserDocumentTest.java

protected void appendData(File source, IParserDocument target) throws IOException {
    final StringBuilder sourceText = new StringBuilder();

    // writing Data
    final CharBuffer buffer = CharBuffer.allocate(50);
    final InputStreamReader sourceReader = new InputStreamReader(new FileInputStream(source),
            Charset.forName("UTF-8"));
    while (sourceReader.read(buffer) != -1) {
        buffer.flip();// w  w  w .j  a  va 2  s.  c o  m
        sourceText.append(buffer);
        target.append(buffer.toString());
        buffer.clear();
    }

    sourceReader.close();
    target.flush();
}

---

From source file:org.wurstworks.tools.pinto.AbstractPintoBean.java

/**
 * Display the help for each of the available command-line parameters supported by this bean. The help is printed to
 * the stream specified by the {@link #setPrintStream(java.io.PrintStream)} property or passed in through the
 * {@link AbstractPintoBean#AbstractPintoBean(Object, String[], java.io.PrintStream)} constructor.
 *///from   w  ww.j a  v  a 2s. c o  m
public void displayHelp() {
    if (_parametersByShortOption == null || _parametersByShortOption.size() == 0) {
        getPrintStream().println("No parameters found for this application!");
    } else {
        // TODO: Add an annotation to put application name, copyright info, and introductory help text on the class level.
        String appName, copyright, introduction;
        PintoApplication application = _parent.getClass().getAnnotation(PintoApplication.class);
        if (application == null) {
            appName = _parent.getClass().getSimpleName();
            copyright = introduction = null;
        } else {
            appName = application.value();
            copyright = application.copyright();
            introduction = application.introduction();
        }

        getPrintStream().println(appName);
        if (!StringUtils.isBlank(copyright)) {
            getPrintStream().println(copyright);
        }
        if (!StringUtils.isBlank(introduction)) {
            getPrintStream().println(introduction);
        }
        getPrintStream().println();

        for (ParameterData parameter : _parametersByShortOption.values()) {
            StringBuilder parameterText = new StringBuilder(PREFIX);
            parameterText.append(SHORT_OPTION_DELIMITER).append(parameter.getShortOption());
            if (parameter.hasLongOption()) {
                parameterText.append(", ").append(LONG_OPTION_DELIMITER).append(parameter.getLongOption());
            }

            // If our parameter text is so long that it will either run into the hanging indent text or directly up
            // to the hanging indent text (i.e., no space left between them)...
            final int length = parameterText.length();
            if (length > HANGING_INDENT - 1) {
                // Then add a new line
                parameterText.append(INDENT_FILLER);
            } else {
                parameterText
                        .append(CharBuffer.allocate(HANGING_INDENT - length).toString().replace('\0', ' '));
            }

            parameterText
                    .append(WordUtils.wrap(parameter.getHelp(), WIDTH - HANGING_INDENT, INDENT_FILLER, true));
            getPrintStream().println(parameterText.toString());
        }
    }
}

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From source file:uk.ac.cam.caret.sakai.rwiki.utils.NameHelper.java

private static String normalize(final String nameToNormalize, final boolean isPageName) {
    char[] chars = nameToNormalize.toCharArray();
    int charBufferLength = chars.length + 1 + (isPageName ? DEFAULT_PAGE.length() : 0);
    CharBuffer name = CharBuffer.allocate(charBufferLength);

    int wordStart = 0;

    boolean addSeparator = true;
    boolean addWhiteSpaceOrSeparator = true;
    int numberOfSeparators = 0;

    for (int i = 0; i < chars.length; i++) {
        char c = chars[i];

        if (c == SPACE_SEPARATOR) {
            if (!addWhiteSpaceOrSeparator) {
                name.put(chars, wordStart, i - wordStart);
            }/*from  w ww  . ja  va  2 s  . c  o  m*/
            addSeparator = true;
            addWhiteSpaceOrSeparator = true;
        } else if (Character.isWhitespace(c)) {
            if (!addWhiteSpaceOrSeparator) {
                name.put(chars, wordStart, i - wordStart);

            }
            addWhiteSpaceOrSeparator = true;
        } else if (addSeparator) {
            name.put(SPACE_SEPARATOR);
            if (++numberOfSeparators > 2) {
                chars[i] = Character.toLowerCase(c);
            }
            wordStart = i;
            addSeparator = false;
            addWhiteSpaceOrSeparator = false;
        } else if (addWhiteSpaceOrSeparator) {
            addWhiteSpaceOrSeparator = false;
            wordStart = i;
            name.put(' ');
            if (numberOfSeparators > 2) {
                chars[i] = Character.toLowerCase(c);
            }
        } else {
            if (numberOfSeparators > 2) {
                chars[i] = Character.toLowerCase(c);
            }
        }

    }

    if (addSeparator && isPageName) {
        name.put(SPACE_SEPARATOR);
        name.put(DEFAULT_PAGE);
    } else if (!addWhiteSpaceOrSeparator) {
        name.put(chars, wordStart, chars.length - wordStart);
    }

    int position = name.position();
    name.position(0);
    name.limit(position);

    return name.toString();
}

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From source file:uk.ac.ebi.arrayexpress.servlets.HttpProxyServlet.java

@Override
protected void doRequest(HttpServletRequest request, HttpServletResponse response, RequestType requestType)
        throws ServletException, IOException {
    RegexHelper MATCH_URL_REGEX = new RegexHelper("/+(.+)", "i");
    RegexHelper TEST_HOST_IN_URL_REGEX = new RegexHelper("^http\\:/{2}([^/]+)/", "i");
    RegexHelper SQUARE_BRACKETS_REGEX = new RegexHelper("\\[\\]", "g");

    logRequest(logger, request, requestType);

    String url = MATCH_URL_REGEX.matchFirst(request.getPathInfo());
    url = url.replaceFirst("http:/{1,2}", "http://"); // stupid hack as tomcat 6.0 removes second forward slash
    String queryString = request.getQueryString();

    if (0 < url.length()) {
        if (!TEST_HOST_IN_URL_REGEX.test(url)) { // no host here, will self
            url = "http://localhost:" + String.valueOf(request.getLocalPort()) + "/" + url;
        }/*from  w  w w  .ja va  2s  .  c  om*/
        logger.debug("Will access [{}]", url);

        GetMethod getMethod = new GetMethod(url);

        if (null != queryString) {
            queryString = SQUARE_BRACKETS_REGEX.replace(queryString, "%5B%5D");
            getMethod.setQueryString(queryString);
        }

        Enumeration requestHeaders = request.getHeaderNames();
        while (requestHeaders.hasMoreElements()) {
            String name = (String) requestHeaders.nextElement();
            String value = request.getHeader(name);
            if (null != value) {
                getMethod.setRequestHeader(name, value);
            }
        }

        try {
            httpClient.executeMethod(getMethod);

            int statusCode = getMethod.getStatusCode();
            long contentLength = getMethod.getResponseContentLength();
            logger.debug("Got response [{}], length [{}]", statusCode, contentLength);

            Header[] responseHeaders = getMethod.getResponseHeaders();
            for (Header responseHeader : responseHeaders) {
                String name = responseHeader.getName();
                String value = responseHeader.getValue();
                if (null != name && null != value && !(name.equals("Server") || name.equals("Date")
                        || name.equals("Transfer-Encoding"))) {
                    response.setHeader(responseHeader.getName(), responseHeader.getValue());
                }
            }

            if (200 != statusCode) {
                response.setStatus(statusCode);
            }

            InputStream inStream = getMethod.getResponseBodyAsStream();
            if (null != inStream) {
                BufferedReader in = new BufferedReader(new InputStreamReader(inStream));

                BufferedWriter out = new BufferedWriter(new OutputStreamWriter(response.getOutputStream()));

                CharBuffer buffer = CharBuffer.allocate(PROXY_BUFFER_SIZE);
                while (in.read(buffer) >= 0) {
                    buffer.flip();
                    out.append(buffer);
                    buffer.clear();
                }

                in.close();
                out.close();
            }
        } catch (Exception x) {
            if (x.getClass().getName().equals("org.apache.catalina.connector.ClientAbortException")) {
                logger.warn("Client aborted connection");
            } else {
                logger.error("Caught an exception:", x);
                response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, x.getMessage());
            }
        } finally {
            getMethod.releaseConnection();
        }
    }
}

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