Example usage for java.io PushbackInputStream PushbackInputStream

Introduction

In this page you can find the example usage for java.io PushbackInputStream PushbackInputStream.

Prototype

public PushbackInputStream(InputStream in, int size) 

Source Link

Document

Creates a PushbackInputStream with a pushback buffer of the specified size, and saves its argument, the input stream in, for later use.

Usage

From source file:com.netsteadfast.greenstep.util.SimpleUtils.java

/**
 * http://stackoverflow.com/questions/12593752/why-do-i-failed-to-read-excel-2007-using-poi
 * /*from ww w.j  a  v  a 2  s.  c  o  m*/
 * @param inp
 * @return
 * @throws IOException
 * @throws InvalidFormatException
 */
public static Workbook createPOIWorkbook(InputStream inp) throws IOException, InvalidFormatException {
    // If clearly doesn't do mark/reset, wrap up
    if (!inp.markSupported()) {
        inp = new PushbackInputStream(inp, 8);
    }
    if (POIFSFileSystem.hasPOIFSHeader(inp)) {
        return new HSSFWorkbook(inp);
    }
    if (DocumentFactoryHelper.hasOOXMLHeader(inp)) {
        return new XSSFWorkbook(OPCPackage.open(inp));
    }
    throw new IllegalArgumentException("Your InputStream was neither an OLE2 stream, nor an OOXML stream");
}

---

From source file:org.osaf.cosmo.cmp.CmpServlet.java

private Document readXmlRequest(HttpServletRequest req) throws SAXException, IOException {
    if (req.getContentLength() == 0) {
        return null;
    }//from w ww .ja va  2s  .  c  o m
    InputStream in = req.getInputStream();
    if (in == null) {
        return null;
    }

    // check to see if there's any data to read
    PushbackInputStream filtered = new PushbackInputStream(in, 1);
    int read = filtered.read();
    if (read == -1) {
        return null;
    }
    filtered.unread(read);

    // there is data, so read the stream
    try {
        BUILDER_FACTORY.setNamespaceAware(true);
        DocumentBuilder docBuilder = BUILDER_FACTORY.newDocumentBuilder();
        return docBuilder.parse(filtered);
    } catch (ParserConfigurationException e) {
        throw new CmpException("error configuring xml builder", e);
    }
}

---

From source file:org.adl.parsers.dom.ADLDOMParser.java

/**
 * Sets up the file source for the test subject file.
 *
 * @param iFileName file to setup input source for.
 *
 * @return InputSource// www.  j  a  va2  s.  c o m
 */
private InputSource setupFileSource(String iFileName) {
    log.debug("setupFileSource()");
    String msgText;
    boolean defaultEncoding = true;
    String encoding = null;
    PushbackInputStream inputStream;
    FileInputStream inFile;

    try {
        File xmlFile = new File(iFileName);
        log.debug(xmlFile.getAbsolutePath());

        if (xmlFile.isFile()) {
            InputSource is = null;

            defaultEncoding = true;
            if (xmlFile.length() > 1) {
                inFile = new FileInputStream(xmlFile);
                inputStream = new PushbackInputStream(inFile, 4);

                // Reads the initial 4 bytes of the file to check for a Byte
                // Order Mark and determine the encoding

                byte bom[] = new byte[4];
                int n, pushBack;
                n = inputStream.read(bom, 0, bom.length);

                // UTF-8 Encoded
                if ((bom[0] == (byte) 0xEF) && (bom[1] == (byte) 0xBB) && (bom[2] == (byte) 0xBF)) {
                    encoding = "UTF-8";
                    defaultEncoding = false;
                    pushBack = n - 3;
                }
                // UTF-16 Big Endian Encoded
                else if ((bom[0] == (byte) 0xFE) && (bom[1] == (byte) 0xFF)) {
                    encoding = "UTF-16BE";
                    defaultEncoding = false;
                    pushBack = n - 2;
                }
                // UTF-16 Little Endian Encoded               
                else if ((bom[0] == (byte) 0xFF) && (bom[1] == (byte) 0xFE)) {
                    encoding = "UTF-16LE";
                    defaultEncoding = false;
                    pushBack = n - 2;
                }
                // Default encoding
                else {
                    // Unicode BOM mark not found, unread all bytes                  
                    pushBack = n;
                }

                // Place any non-BOM bytes back into the stream
                if (pushBack > 0) {
                    inputStream.unread(bom, (n - pushBack), pushBack);
                }

                if (defaultEncoding == true) { //Reads in ASCII file.
                    FileReader fr = new FileReader(xmlFile);
                    is = new InputSource(fr);
                }
                // Reads the file in the determined encoding
                else {
                    //Creates a buffer with the size of the xml encoded file
                    BufferedReader inStream = new BufferedReader(new InputStreamReader(inputStream, encoding));
                    StringBuffer dataString = new StringBuffer();
                    String s = "";

                    //Builds the encoded file to be parsed
                    while ((s = inStream.readLine()) != null) {
                        dataString.append(s);
                    }

                    inStream.close();
                    inputStream.close();
                    inFile.close();
                    is = new InputSource(new StringReader(dataString.toString()));
                    is.setEncoding(encoding);
                }
            }
            return is;
        } else if ((iFileName.length() > 6)
                && (iFileName.substring(0, 5).equals("http:") || iFileName.substring(0, 6).equals("https:"))) {
            URL xmlURL = new URL(iFileName);
            InputStream xmlIS = xmlURL.openStream();
            InputSource is = new InputSource(xmlIS);
            return is;
        } else {
            msgText = "XML File: " + iFileName + " is not a file or URL";
            log.error(msgText);
        }
    } catch (NullPointerException npe) {
        msgText = "Null pointer exception" + npe;
        log.error(msgText);
    } catch (SecurityException se) {
        msgText = "Security Exception" + se;
        log.error(msgText);
    } catch (FileNotFoundException fnfe) {
        msgText = "File Not Found Exception" + fnfe;
        log.error(msgText);
    } catch (Exception e) {
        msgText = "General Exception" + e;
        log.error(msgText);
    }

    log.debug("setUpFileSource()");

    return new InputSource();
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• »