Example usage for java.io DataInputStream available

Introduction

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

Prototype

public int available() throws IOException 

Source Link

Document

Returns an estimate of the number of bytes that can be read (or skipped over) from this input stream without blocking by the next caller of a method for this input stream.

Usage

From source file:org.kualigan.maven.plugins.api.DefaultPrototypeHelper.java

/**
 * Puts temporary pom in the system temp directory. prototype-pom.xml is extracted
 * from the plugin.// ww  w  .j a  v  a2 s  .  co m
 */
public void extractTempPom() throws MojoExecutionException {
    getCaller().getLog().info("Extracting the Temp Pom");

    final InputStream pom_is = getClass().getClassLoader().getResourceAsStream("prototype-resources/pom.xml");

    byte[] fileBytes = null;
    try {
        final DataInputStream dis = new DataInputStream(pom_is);
        fileBytes = new byte[dis.available()];
        dis.readFully(fileBytes);
        dis.close();
    } catch (Exception e) {
        throw new MojoExecutionException("Wasn't able to read in the prototype pom", e);
    } finally {
        try {
            pom_is.close();
        } catch (Exception e) {
            // Ignore exceptions
        }
    }

    try {
        final FileOutputStream fos = new FileOutputStream(
                System.getProperty("java.io.tmpdir") + File.separator + "prototype-pom.xml");
        try {
            fos.write(fileBytes);
        } finally {
            fos.close();
        }
    } catch (Exception e) {
        throw new MojoExecutionException("Could not write temporary pom file", e);
    }
}

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From source file:SafeUTF.java

public String safeReadUTF(DataInputStream in) throws IOException {
    boolean isNull = in.readByte() == NULL;

    if (isNull) {
        return null;
    }//from   ww  w .j a  v a  2s . co m

    short numChunks = in.readShort();

    int bufferSize = chunkSize * numChunks;

    // special handling for single chunk
    if (numChunks == 1) {
        // The text size is likely to be much smaller than the chunkSize
        // so set bufferSize to the min of the input stream available
        // and the maximum buffer size. Since the input stream
        // available() can be <= 0 we check for that and default to
        // a small msg size of 256 bytes.

        int inSize = in.available();

        if (inSize <= 0) {
            inSize = 256;
        }

        bufferSize = Math.min(inSize, bufferSize);

        lastReadBufferSize = bufferSize;
    }

    StringBuffer buff = new StringBuffer(bufferSize);

    for (int i = 0; i < numChunks; i++) {
        String s = in.readUTF();

        buff.append(s);
    }

    return buff.toString();
}

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From source file:net.sergetk.mobile.lcdui.BitmapFont.java

/**
 * Creates a new font from the resource. The capacity of the color cache defines maximum size of
 * the color cache.//from  w ww. java2s .c o m
 * 
 * @param fontPath
 *            the resource name
 * @param colorCacheCapacity
 *            the maximum color cache size
 */
public BitmapFont(String fontPath, int colorCacheCapacity) {
    this.style = Font.STYLE_PLAIN;
    this.currentColor = 0;
    this.colorCache = new CacheEntry[colorCacheCapacity];
    this.colorUsageCounts = new IntHashMap(colorCacheCapacity * 2);

    try {
        InputStream input = new Object().getClass().getResourceAsStream(fontPath);
        if (input == null) {
            throw new IOException();
        }

        DataInputStream data = new DataInputStream(input);

        int streamLen = data.available();

        this.fontFilePath = fontPath;

        this.version = data.readByte();
        this.height = data.readByte();
        this.baseline = data.readByte();
        this.xIndent = data.readByte();
        this.yIndent = data.readByte();
        this.spaceWidth = data.readByte();

        characterMap = data.readUTF();
        int count = characterMap.length();

        // read characters widthes
        this.widths = new int[count];
        this.x = new int[count];
        this.y = new int[count];

        for (int i = 0; i < count; i++) {
            widths[i] = data.readByte();
        }

        baseImage = null;

        // the original implementation supported multiple-images
        // in the font file, but this is not necessary. Because I do
        // not want to change the encoding, I am leaving this byte that
        // used to represent the number of PNGs in the file
        data.skipBytes(1);

        short pngLen = data.readShort();
        byte[] buffer = new byte[pngLen];

        data.read(buffer, 0, pngLen);
        this.pngOffset = (short) (streamLen - pngLen);
        baseImage = Image.createImage(buffer, 0, pngLen);
        currentImage = baseImage;

        // calculate characters coordinates
        int curX = 0, curY = 0;
        for (int i = 0; i < count; i++) {
            if (widths[i] < 0) {
                // negative width points to another character
                int sourceIndex = -widths[i];
                widths[i] = widths[sourceIndex];
                x[i] = x[sourceIndex];
                y[i] = y[sourceIndex];
            } else {
                x[i] = curX;
                y[i] = curY;
                curX += widths[i];
            }
        }

        if (defaultFont == null)
            defaultFont = this;
    } catch (IOException e) {
        // Log.warn("IOException reading font: ", e);
        System.err.println("IOException reading font: " + e.getMessage());
        e.printStackTrace();
    }
}

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From source file:org.mrgeo.vector.mrsvector.VectorTile.java

protected static HeaderBlock readOSMHeader(final InputStream stream) throws IOException {
    DataInputStream dis;
    if (stream instanceof DataInputStream) {
        dis = (DataInputStream) stream;
    } else {/*from   w w  w .ja v a2 s .c  om*/
        dis = new DataInputStream(stream);
    }

    while (dis.available() > 0) {
        final BlobHeader header = parseHeader(dis);
        if (header.getType().equals(OSMHEADER)) {
            final CodedInputStream blob = CodedInputStream.newInstance(parseBlob(dis, header));
            final HeaderBlock hb = HeaderBlock.parseFrom(blob);

            return hb;
        }
    }

    return null;
}

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From source file:com.isecpartners.gizmo.HttpRequest.java

private void readerToStringBuffer(DataInputStream buffered, StringBuffer contents) {

    try {/* www  . jav  a2s.c om*/

        byte ch_n = buffered.readByte();

        while (ch_n != -1) {
            contents.append((char) ch_n);

            if ((contents.indexOf("\r\n\r\n") != -1) || (buffered.available() == 0)) {
                break;
            }
            ch_n = buffered.readByte();
        }
    } catch (Exception ex) {
        System.out.println(ex);
    }
}

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From source file:org.siphon.d2js.EmbedSqlTranslator.java

private String getLineNear(String code, int pos) {

    DataInputStream inputStream = new DataInputStream(IOUtils.toInputStream(code));

    String line = null;//  ww  w  .  j  av a  2s  .  c  om
    int lineHead = 0;
    int lineIndex = 0;
    try {
        while (inputStream.available() >= code.length() - pos) {
            lineHead = code.length() - inputStream.available();
            line = inputStream.readLine();
            lineIndex++;
        }
    } catch (IOException e) {
        // e.printStackTrace();
    }

    String s = "LN " + lineIndex + ":" + (pos - lineHead + 1) + " " + line;

    return s;
}

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From source file:org.kalypso.kalypsomodel1d2d.sim.ResultManager.java

private void processSWANTabFile(final FileObject swanResOutTabFile, final FileObject swanResShiftFile) {
    final GM_Position lShiftPosition = SWANDataConverterHelper.readCoordinateShiftValues(swanResShiftFile);
    if (lShiftPosition == null) {
        return;/*  w w  w. jav  a  2s  .c o m*/
    }
    try {
        if (swanResOutTabFile.isContentOpen()) {
            swanResOutTabFile.close();
        }
        final FileObject swanResOutTabFileBackUp = swanResOutTabFile.getParent()
                .resolveFile(swanResOutTabFile.getName().getBaseName() + ".bck"); //$NON-NLS-1$
        swanResOutTabFile.moveTo(swanResOutTabFileBackUp);

        // int lIntLinesCounter = 0;
        final OutputStream lOutStream = swanResOutTabFile.getContent().getOutputStream();
        final DataInputStream lInDataStream = new DataInputStream(
                swanResOutTabFileBackUp.getContent().getInputStream());
        BufferedReader streamReader = new BufferedReader(new InputStreamReader(lInDataStream));
        final Formatter lFormatter = new Formatter(lOutStream, Charset.defaultCharset().name(), Locale.US);
        while (lInDataStream.available() != 0) {
            final String lStrTmpLine = streamReader.readLine().trim();
            // ++lIntLinesCounter;
            if (lStrTmpLine.startsWith("%")) { //$NON-NLS-1$
                lFormatter.format("%s\n", lStrTmpLine); //$NON-NLS-1$
                continue;
            }
            final StringTokenizer lStrTokenizer = new StringTokenizer(lStrTmpLine, " "); //$NON-NLS-1$
            int lIntTokenCounter = 0;
            String lStrNewLine = ""; //$NON-NLS-1$
            while (lStrTokenizer.hasMoreTokens()) {
                final String lStrToken = lStrTokenizer.nextToken();
                if (lIntTokenCounter == 1) {
                    lStrNewLine += String.format(Locale.US, "%.5f\t", //$NON-NLS-1$
                            NumberUtils.parseQuietDouble(lStrToken) + lShiftPosition.getX());
                } else if (lIntTokenCounter == 2) {
                    lStrNewLine += String.format(Locale.US, "%.5f\t", //$NON-NLS-1$
                            NumberUtils.parseQuietDouble(lStrToken) + lShiftPosition.getY());
                } else {
                    lStrNewLine += lStrToken + "\t"; //$NON-NLS-1$
                }
                lIntTokenCounter++;
            }
            lFormatter.format("%s\n", lStrNewLine); //$NON-NLS-1$

        }
        lFormatter.close();
        lInDataStream.close();
        lOutStream.close();
    } catch (final Exception e) {
        return;
    }

    return;
}

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From source file:org.pentaho.di.job.entries.folderscompare.JobEntryFoldersCompare.java

/**
 * Check whether 2 files have the same contents.
 *
 * @param file1//w  w w.j  ava 2s  . co  m
 *          first file to compare
 * @param file2
 *          second file to compare
 * @return true if files are equal, false if they are not
 *
 * @throws IOException
 *           upon IO problems
 */
protected boolean equalFileContents(FileObject file1, FileObject file2) throws KettleFileException {
    // Really read the contents and do comparisons
    DataInputStream in1 = null;
    DataInputStream in2 = null;
    try {
        // Really read the contents and do comparisons

        in1 = new DataInputStream(
                new BufferedInputStream(KettleVFS.getInputStream(KettleVFS.getFilename(file1), this)));
        in2 = new DataInputStream(
                new BufferedInputStream(KettleVFS.getInputStream(KettleVFS.getFilename(file2), this)));

        char ch1, ch2;
        while (in1.available() != 0 && in2.available() != 0) {
            ch1 = (char) in1.readByte();
            ch2 = (char) in2.readByte();
            if (ch1 != ch2) {
                return false;
            }
        }
        if (in1.available() != in2.available()) {
            return false;
        } else {
            return true;
        }
    } catch (IOException e) {
        throw new KettleFileException(e);
    } finally {
        if (in1 != null) {
            try {
                in1.close();
            } catch (IOException ignored) {
                // Nothing to see here...
            }
        }
        if (in2 != null) {
            try {
                in2.close();
            } catch (Exception ignored) {
                // We can't do anything else here...
            }
        }
    }
}

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From source file:org.mrgeo.vector.mrsvector.VectorTileCleaner.java

void read(final InputStream stream) throws IOException {
    DataInputStream dis;
    if (stream instanceof DataInputStream) {
        dis = (DataInputStream) stream;
    } else {/*from   w ww .  java 2 s .c o m*/
        dis = new DataInputStream(stream);
    }

    while (dis.available() > 0) {
        final BlobHeader header = parseHeader(dis);
        // final InputStream blob =;
        final CodedInputStream blob = CodedInputStream.newInstance(parseBlob(dis, header));

        // for speed, we make _large_ tiles, we don't want protobuf to complain...
        blob.setSizeLimit(MAX_STREAM_SIZE);

        if (header.getType().equals(OSMDATA)) {
            parseOSM(blob);
        }
    }

    organize();
}

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From source file:org.commoncrawl.service.crawlhistory.CrawlHistoryServer.java

@Override
public void bulkUpdateHistory(AsyncContext<BulkUpdateData, NullMessage> rpcContext) throws RPCException {

    LOG.info("Received BulkUpdate Request");
    ImmutableBuffer inputBuffer = rpcContext.getInput().getFingerprintList();

    if (inputBuffer.getCount() != 0) {
        try {/*www  .j av  a 2 s . co  m*/

            if (_bloomFilter == null) {
                throw new IOException("BloomFilter Not Initilized. Invalid Server State!");
            }

            DataInputStream inputStream = new DataInputStream(
                    new ByteArrayInputStream(inputBuffer.getReadOnlyBytes(), 0, inputBuffer.getCount()));

            URLFPV2 fingerprint = new URLFPV2();

            int itemsAdded = 0;
            while (inputStream.available() != 0) {
                fingerprint.setDomainHash(WritableUtils.readVLong(inputStream));
                fingerprint.setUrlHash(WritableUtils.readVLong(inputStream));
                _bloomFilter.add(fingerprint);
                ++itemsAdded;
            }
            _urlsProcessedSinceCheckpoint.addAndGet(itemsAdded);

            LOG.info("Finished Processed BulkUpdate Request. " + itemsAdded + " items processed.");
        } catch (IOException e) {
            LOG.error(CCStringUtils.stringifyException(e));
            rpcContext.setStatus(Status.Error_RequestFailed);
            rpcContext.setErrorDesc(CCStringUtils.stringifyException(e));
        }
        rpcContext.completeRequest();
    }
}

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