List of usage examples for java.io DataInputStream readInt
public final int readInt() throws IOException
readInt method of DataInput. From source file:com.ocpsoft.pretty.faces.config.annotation.ByteCodeAnnotationFilter.java
/** * <p>//from w ww . j a v a2 s.co m * Checks whether that supplied {@link InputStream} contains a Java class * file that might contain PrettyFaces annotations. * </p> * <p> * The caller of this method is responsible to close the supplied * {@link InputStream}. This method won't do it! * </p> * * @param classFileStream * The stream to read the class file from. * @return <code>true</code> for files that should be further checked for * annotations * @throws IOException * for any kind of IO problem */ @SuppressWarnings("unused") public boolean accept(InputStream classFileStream) throws IOException { // open a DataInputStream DataInputStream in = new DataInputStream(classFileStream); // read magic and abort if it doesn't match int magic = in.readInt(); if (magic != CLASS_FILE_MAGIC) { if (log.isDebugEnabled()) { log.debug("Magic not found! Not a valid class file!"); } return false; } // check for at least JDK 1.5 int minor = in.readUnsignedShort(); int major = in.readUnsignedShort(); if (major < 49) { // JDK 1.4 or less if (log.isTraceEnabled()) { log.trace("Not a JDK5 class! It cannot contain annotations!"); } return false; } // this values is equal to the number entries in the constants pool + 1 int constantPoolEntries = in.readUnsignedShort() - 1; // loop over all entries in the constants pool for (int i = 0; i < constantPoolEntries; i++) { // the tag to identify the record type int tag = in.readUnsignedByte(); // process record according to its type switch (tag) { case CONSTANT_Class: /* * CONSTANT_Class_info { * u1 tag; * u2 name_index; * } */ in.readUnsignedShort(); break; case CONSTANT_Fieldref: case CONSTANT_Methodref: case CONSTANT_InterfaceMethodref: /* * CONSTANT_[Fieldref|Methodref|InterfaceMethodref]_info { * u1 tag; * u2 class_index; * u2 name_and_type_index; * } */ in.readUnsignedShort(); in.readUnsignedShort(); break; case CONSTANT_String: /* * CONSTANT_String_info { * u1 tag; * u2 string_index; * } */ in.readUnsignedShort(); break; case CONSTANT_Integer: case CONSTANT_Float: /* * CONSTANT_[Integer|Float]_info { * u1 tag; * u4 bytes; * } */ in.readInt(); break; case CONSTANT_Long: case CONSTANT_Double: /* * CONSTANT_Long_info { * u1 tag; * u4 high_bytes; * u4 low_bytes; * } */ in.readLong(); /* * We must increase the constant pool index because this tag * type takes two entries */ i++; break; case CONSTANT_NameAndType: /* * CONSTANT_NameAndType_info { * u1 tag; * u2 name_index; * u2 descriptor_index; * } */ in.readUnsignedShort(); in.readUnsignedShort(); break; case CONSTANT_Utf8: /* * CONSTANT_Utf8_info { * u1 tag; * u2 length; * u1 bytes[length]; * } */ String str = in.readUTF(); // check if this string sounds interesting if (str.contains(SEARCH_STRING)) { if (log.isTraceEnabled()) { log.trace("Found PrettyFaces annotation reference in constant pool: " + str); } return true; } break; default: /* * Unknown tag! Should not happen! We will scan the class in this case. */ if (log.isDebugEnabled()) { log.debug("Unknown constant pool tag found: " + tag); } return true; } } /* * We are finished with reading the interesting parts of the class file. * We stop here because the file doesn't seem to be interesting. */ if (log.isTraceEnabled()) { log.trace("No reference to PrettyFaces annotations found!"); } return false; }
From source file:edu.cornell.med.icb.goby.alignments.perms.PermutationReader.java
private void makeIndex(FastBufferedInputStream inputStream) throws IOException { input.position(0);/*from w ww. j a v a 2s. c o m*/ final ObjectArrayList<Block> blocks = new ObjectArrayList<Block>(); final DataInputStream dataInput = new DataInputStream( new FastBufferedInputStream(new FileInputStream(basename + ".perm"))); try { long offset = 0; while (dataInput.available() > 0) { final Block block = new Block(); block.offset = offset; block.n = dataInput.readInt(); block.firstSmallIndex = dataInput.readInt(); dataInput.skip(block.n * 4L); blocks.add(block); offset += block.n * 4L + 8L; } Collections.sort(blocks, SMALL_INDEX_COMPARATOR); indexBlocks = blocks.toArray(new Block[blocks.size()]); } finally { dataInput.close(); } }
From source file:org.carbondata.query.util.CacheUtil.java
public static int getMaxValueFromLevelFile(String filesLocaton) { if (null == filesLocaton) { return 0; }// www .j a v a 2 s . c o m DataInputStream fileChannel = null; try { if (!FileFactory.isFileExist(filesLocaton, FileFactory.getFileType(filesLocaton))) { return 0; } fileChannel = new DataInputStream( FileFactory.getDataInputStream(filesLocaton, FileFactory.getFileType(filesLocaton), 10240)); CarbonFile memberFile = FileFactory.getCarbonFile(filesLocaton, FileFactory.getFileType(filesLocaton)); long size = memberFile.getSize() - 4; long skipSize = size; long actualSkipSize = 0; while (actualSkipSize != size) { actualSkipSize += fileChannel.skip(skipSize); skipSize = skipSize - actualSkipSize; } LOGGER.debug("Bytes skipped " + skipSize); int maxVal = fileChannel.readInt(); return maxVal; } catch (IOException e) { // e.printStackTrace(); LOGGER.error(e, e.getMessage()); } finally { CarbonUtil.closeStreams(fileChannel); } return 0; }
From source file:org.apache.hadoop.yarn.server.timeline.recovery.LeveldbTimelineStateStore.java
private void loadLatestSequenceNumber(TimelineServiceState state) throws IOException { byte[] data = null; try {/*from w w w . j a v a 2 s . c o m*/ data = db.get(LATEST_SEQUENCE_NUMBER_KEY); } catch (DBException e) { throw new IOException(e); } if (data != null) { DataInputStream in = new DataInputStream(new ByteArrayInputStream(data)); try { state.latestSequenceNumber = in.readInt(); } finally { IOUtils.cleanup(LOG, in); } } }
From source file:org.openxdata.server.servlet.WMDownloadServlet.java
private void downloadStudies(HttpServletResponse response) throws Exception { ByteArrayOutputStream baos = new ByteArrayOutputStream(); DataOutputStream dos = new DataOutputStream(baos); formDownloadService.downloadStudies(dos, "", ""); baos.flush();/*from www .ja v a2 s. c o m*/ dos.flush(); byte[] data = baos.toByteArray(); baos.close(); dos.close(); DataInputStream dis = new DataInputStream(new ByteArrayInputStream(data)); PrintWriter out = response.getWriter(); out.println("<StudyList>"); try { @SuppressWarnings("unused") byte size = dis.readByte(); //reads the size of the studies while (true) { String value = "<study id=\"" + dis.readInt() + "\" name=\"" + dis.readUTF() + "\"/>"; out.println(value); } } catch (EOFException exe) { //exe.printStackTrace(); } out.println("</StudyList>"); out.flush(); dis.close(); }
From source file:org.openamf.io.AMFDeserializer.java
/** * This is a hacked verison of Java's DataInputStream.readUTF(), which only * supports Strings <= 65535 UTF-8-encoded characters *///w w w.ja v a 2s . c om private Object readLongUTF(DataInputStream in) throws IOException { int utflen = in.readInt(); StringBuffer str = new StringBuffer(utflen); byte bytearr[] = new byte[utflen]; int c, char2, char3; int count = 0; in.readFully(bytearr, 0, utflen); while (count < utflen) { c = (int) bytearr[count] & 0xff; switch (c >> 4) { case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7: /* 0xxxxxxx*/ count++; str.append((char) c); break; case 12: case 13: /* 110x xxxx 10xx xxxx*/ count += 2; if (count > utflen) throw new UTFDataFormatException(); char2 = (int) bytearr[count - 1]; if ((char2 & 0xC0) != 0x80) throw new UTFDataFormatException(); str.append((char) (((c & 0x1F) << 6) | (char2 & 0x3F))); break; case 14: /* 1110 xxxx 10xx xxxx 10xx xxxx */ count += 3; if (count > utflen) throw new UTFDataFormatException(); char2 = (int) bytearr[count - 2]; char3 = (int) bytearr[count - 1]; if (((char2 & 0xC0) != 0x80) || ((char3 & 0xC0) != 0x80)) throw new UTFDataFormatException(); str.append((char) (((c & 0x0F) << 12) | ((char2 & 0x3F) << 6) | ((char3 & 0x3F) << 0))); break; default: /* 10xx xxxx, 1111 xxxx */ throw new UTFDataFormatException(); } } // The number of chars produced may be less than utflen return new String(str); }
From source file:org.apache.cassandra.db.SuperColumn.java
private void fillSuperColumn(IColumn superColumn, DataInputStream dis) throws IOException { assert dis.available() != 0; /* read the number of columns */ int size = dis.readInt(); /* read the size of all columns */ dis.readInt();//w ww.j a v a 2 s . c o m for (int i = 0; i < size; ++i) { IColumn subColumn = Column.serializer().deserialize(dis); superColumn.addColumn(subColumn.name(), subColumn); } }
From source file:org.apache.xmlgraphics.image.loader.impl.ImageLoaderRawJPEG.java
/** {@inheritDoc} */ public Image loadImage(ImageInfo info, Map hints, ImageSessionContext session) throws ImageException, IOException { if (!MimeConstants.MIME_JPEG.equals(info.getMimeType())) { throw new IllegalArgumentException( "ImageInfo must be from a image with MIME type: " + MimeConstants.MIME_JPEG); }/*from w ww. j av a 2 s .co m*/ ColorSpace colorSpace = null; boolean appeFound = false; int sofType = 0; ByteArrayOutputStream iccStream = null; Source src = session.needSource(info.getOriginalURI()); ImageInputStream in = ImageUtil.needImageInputStream(src); JPEGFile jpeg = new JPEGFile(in); in.mark(); try { outer: while (true) { int reclen; int segID = jpeg.readMarkerSegment(); if (log.isTraceEnabled()) { log.trace("Seg Marker: " + Integer.toHexString(segID)); } switch (segID) { case EOI: log.trace("EOI found. Stopping."); break outer; case SOS: log.trace("SOS found. Stopping early."); //TODO Not sure if this is safe break outer; case SOI: case NULL: break; case SOF0: //baseline case SOF1: //extended sequential DCT case SOF2: //progressive (since PDF 1.3) case SOFA: //progressive (since PDF 1.3) sofType = segID; if (log.isTraceEnabled()) { log.trace("SOF: " + Integer.toHexString(sofType)); } in.mark(); try { reclen = jpeg.readSegmentLength(); in.skipBytes(1); //data precision in.skipBytes(2); //height in.skipBytes(2); //width int numComponents = in.readUnsignedByte(); if (numComponents == 1) { colorSpace = ColorSpace.getInstance(ColorSpace.CS_GRAY); } else if (numComponents == 3) { colorSpace = ColorSpace.getInstance(ColorSpace.CS_LINEAR_RGB); } else if (numComponents == 4) { colorSpace = DeviceCMYKColorSpace.getInstance(); } else { throw new ImageException("Unsupported ColorSpace for image " + info + ". The number of components supported are 1, 3 and 4."); } } finally { in.reset(); } in.skipBytes(reclen); break; case APP2: //ICC (see ICC1V42.pdf) in.mark(); try { reclen = jpeg.readSegmentLength(); // Check for ICC profile byte[] iccString = new byte[11]; in.readFully(iccString); in.skipBytes(1); //string terminator (null byte) if ("ICC_PROFILE".equals(new String(iccString, "US-ASCII"))) { in.skipBytes(2); //chunk sequence number and total number of chunks int payloadSize = reclen - 2 - 12 - 2; if (ignoreColorProfile(hints)) { log.debug("Ignoring ICC profile data in JPEG"); in.skipBytes(payloadSize); } else { byte[] buf = new byte[payloadSize]; in.readFully(buf); if (iccStream == null) { if (log.isDebugEnabled()) { log.debug("JPEG has an ICC profile"); DataInputStream din = new DataInputStream(new ByteArrayInputStream(buf)); log.debug("Declared ICC profile size: " + din.readInt()); } //ICC profiles can be split into several chunks //so collect in a byte array output stream iccStream = new ByteArrayOutputStream(); } iccStream.write(buf); } } } finally { in.reset(); } in.skipBytes(reclen); break; case APPE: //Adobe-specific (see 5116.DCT_Filter.pdf) in.mark(); try { reclen = jpeg.readSegmentLength(); // Check for Adobe header byte[] adobeHeader = new byte[5]; in.readFully(adobeHeader); if ("Adobe".equals(new String(adobeHeader, "US-ASCII"))) { // The reason for reading the APPE marker is that Adobe Photoshop // generates CMYK JPEGs with inverted values. The correct thing // to do would be to interpret the values in the marker, but for now // only assume that if APPE marker is present and colorspace is CMYK, // the image is inverted. appeFound = true; } } finally { in.reset(); } in.skipBytes(reclen); break; default: jpeg.skipCurrentMarkerSegment(); } } } finally { in.reset(); } ICC_Profile iccProfile = buildICCProfile(info, colorSpace, iccStream); if (iccProfile == null && colorSpace == null) { throw new ImageException("ColorSpace could not be identified for JPEG image " + info); } boolean invertImage = false; if (appeFound && colorSpace.getType() == ColorSpace.TYPE_CMYK) { if (log.isDebugEnabled()) { log.debug("JPEG has an Adobe APPE marker. Note: CMYK Image will be inverted. (" + info.getOriginalURI() + ")"); } invertImage = true; } ImageRawJPEG rawImage = new ImageRawJPEG(info, ImageUtil.needInputStream(src), sofType, colorSpace, iccProfile, invertImage); return rawImage; }
From source file:com.exadel.flamingo.flex.messaging.amf.io.AMF0Deserializer.java
/** * This is a hacked verison of Java's DataInputStream.readUTF(), which only * supports Strings <= 65535 UTF-8-encoded characters *///from w w w . jav a 2s. co m private Object readLongUTF(DataInputStream in) throws IOException { int utflen = in.readInt(); StringBuffer str = new StringBuffer(utflen); byte bytearr[] = new byte[utflen]; int c, char2, char3; int count = 0; in.readFully(bytearr, 0, utflen); while (count < utflen) { c = bytearr[count] & 0xff; switch (c >> 4) { case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7: /* 0xxxxxxx*/ count++; str.append((char) c); break; case 12: case 13: /* 110x xxxx 10xx xxxx*/ count += 2; if (count > utflen) throw new UTFDataFormatException(); char2 = bytearr[count - 1]; if ((char2 & 0xC0) != 0x80) throw new UTFDataFormatException(); str.append((char) (((c & 0x1F) << 6) | (char2 & 0x3F))); break; case 14: /* 1110 xxxx 10xx xxxx 10xx xxxx */ count += 3; if (count > utflen) throw new UTFDataFormatException(); char2 = bytearr[count - 2]; char3 = bytearr[count - 1]; if (((char2 & 0xC0) != 0x80) || ((char3 & 0xC0) != 0x80)) throw new UTFDataFormatException(); str.append((char) (((c & 0x0F) << 12) | ((char2 & 0x3F) << 6) | ((char3 & 0x3F) << 0))); break; default: /* 10xx xxxx, 1111 xxxx */ throw new UTFDataFormatException(); } } // The number of chars produced may be less than utflen return new String(str); }
From source file:com.sky.drovik.player.media.DiskCache.java
private void loadIndex() { final String indexFilePath = getIndexFilePath(); try {// w w w .jav a2 s . co m // Open the input stream. final FileInputStream fileInput = new FileInputStream(indexFilePath); final BufferedInputStream bufferedInput = new BufferedInputStream(fileInput, 1024); final DataInputStream dataInput = new DataInputStream(bufferedInput); // Read the header. final int magic = dataInput.readInt(); final int version = dataInput.readInt(); boolean valid = true; if (magic != INDEX_HEADER_MAGIC) { Log.e(TAG, "Index file appears to be corrupt (" + magic + " != " + INDEX_HEADER_MAGIC + "), " + indexFilePath); valid = false; } if (valid && version != INDEX_HEADER_VERSION) { // Future versions can implement upgrade in this case. Log.e(TAG, "Index file version " + version + " not supported"); valid = false; } if (valid) { mTailChunk = dataInput.readShort(); } // Read the entries. if (valid) { // Parse the index file body into the in-memory map. final int numEntries = dataInput.readInt(); mIndexMap = new LongSparseArray<Record>(numEntries); synchronized (mIndexMap) { for (int i = 0; i < numEntries; ++i) { final long key = dataInput.readLong(); final int chunk = dataInput.readShort(); final int offset = dataInput.readInt(); final int size = dataInput.readInt(); final int sizeOnDisk = dataInput.readInt(); final long timestamp = dataInput.readLong(); mIndexMap.append(key, new Record(chunk, offset, size, sizeOnDisk, timestamp)); } } } dataInput.close(); if (!valid) { deleteAll(); } } catch (FileNotFoundException e) { // If the file does not exist the cache is empty, so just continue. } catch (IOException e) { Log.e(TAG, "Unable to read the index file " + indexFilePath); } finally { if (mIndexMap == null) { mIndexMap = new LongSparseArray<Record>(); } } }