Java Code Examples for java.io.RandomAccessFile#readLong()
The following examples show how to use
java.io.RandomAccessFile#readLong() .
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Example 1
Source File: TestRecordingFile.java From TencentKona-8 with GNU General Public License v2.0 | 6 votes |
private static Path createBrokenMetadata(Path valid) throws Exception { try { Path broken = Utils.createTempFile("broken-metadata", ".jfr"); Files.delete(broken); Files.copy(valid, broken); RandomAccessFile raf = new RandomAccessFile(broken.toFile(), "rw"); raf.seek(METADATA_OFFSET); long metadataOffset = raf.readLong(); raf.seek(metadataOffset); raf.writeLong(Long.MAX_VALUE); raf.writeLong(Long.MAX_VALUE); raf.close(); return broken; } catch (IOException ioe) { throw new Exception("Could not produce a broken EventSet from file " + valid, ioe); } }
Example 2
Source File: OverlappedTrainingRunner.java From sgdtk with Apache License 2.0 | 6 votes |
private void passN() throws IOException { // Get FV from file randomAccessFile = new RandomAccessFile(getCacheFile(), "r"); while (randomAccessFile.getFilePointer() < randomAccessFile.length()) { int recordLength = (int) randomAccessFile.readLong(); packBuffer = growIfNeeded(packBuffer, recordLength); randomAccessFile.read(packBuffer, 0, recordLength); FeatureVector fv = toFeatureVector(); // add to ring buffer addWithProb(fv); } randomAccessFile.close(); signalEndEpoch(); }
Example 3
Source File: DiskFPSet.java From tlaplus with MIT License | 6 votes |
public long checkFPs() throws IOException { // It seems pointless to acquire the locks when checkFPs is only // executed after model checking has finished. Lock the disk // fingerprint sets though. Acquiring the locks is cheap. acquireTblWriteLock(); flusher.flushTable(); releaseTblWriteLock(); RandomAccessFile braf = new BufferedRandomAccessFile( this.fpFilename, "r"); long fileLen = braf.length(); long dis = Long.MAX_VALUE; if (fileLen > 0) { long x = braf.readLong(); while (braf.getFilePointer() < fileLen) { long y = braf.readLong(); long dis1 = y - x; if (dis1 >= 0) { dis = Math.min(dis, dis1); } x = y; } } braf.close(); return dis; }
Example 4
Source File: TestRecordingFile.java From openjdk-jdk8u with GNU General Public License v2.0 | 6 votes |
private static Path createBrokenMetadata(Path valid) throws Exception { try { Path broken = Utils.createTempFile("broken-metadata", ".jfr"); Files.delete(broken); Files.copy(valid, broken); RandomAccessFile raf = new RandomAccessFile(broken.toFile(), "rw"); raf.seek(METADATA_OFFSET); long metadataOffset = raf.readLong(); raf.seek(metadataOffset); raf.writeLong(Long.MAX_VALUE); raf.writeLong(Long.MAX_VALUE); raf.close(); return broken; } catch (IOException ioe) { throw new Exception("Could not produce a broken EventSet from file " + valid, ioe); } }
Example 5
Source File: ShortLong.java From nyzoVerifier with The Unlicense | 5 votes |
public static ShortLong fromFile(RandomAccessFile file) { long combinedValue = 0; try { combinedValue = file.readLong(); } catch (Exception ignored) { } int shortValue = (int) ((combinedValue >> 48) & 0xffff); long longValue = combinedValue & 0xffffffffffffL; return new ShortLong(shortValue, longValue); }
Example 6
Source File: Paged.java From btree4j with Apache License 2.0 | 5 votes |
protected void read(RandomAccessFile raf) throws IOException { this._fhSize = raf.readShort(); this._pageSize = raf.readInt(); this._totalPageCount = raf.readLong(); this._firstFreePage = raf.readLong(); this._lastFreePage = raf.readLong(); this._pageHeaderSize = raf.readByte(); }
Example 7
Source File: OffHeapDiskFPSet.java From tlaplus with MIT License | 5 votes |
protected void writeIndex(long[] index, final RandomAccessFile raf, long length) throws IOException { for (int i = 0; i < index.length; i++) { long pos = Math.min(((long) i) * NumEntriesPerPage, length); raf.seek(pos * LongSize); final long value = raf.readLong(); index[i] = value; } }
Example 8
Source File: OffHeapDiskFPSet.java From tlaplus with MIT License | 5 votes |
private static boolean checkIndex(final long[] idx, final RandomAccessFile raf, final long length) throws IOException { for (long i = 0L; i < idx.length; i++) { final long pos = Math.min(i * NumEntriesPerPage, length); raf.seek(pos * LongSize); final long value = raf.readLong(); final long index = idx[(int) i]; if (value != index) { return false; } } return true; }
Example 9
Source File: Block.java From nyzoVerifier with The Unlicense | 5 votes |
public static Block fromFile(RandomAccessFile file) { Block block = null; try { ShortLong versionAndHeight = ShortLong.fromFile(file); int blockchainVersion = versionAndHeight.getShortValue(); long blockHeight = versionAndHeight.getLongValue(); byte[] previousBlockHash = Message.getByteArray(file, FieldByteSize.hash); long startTimestamp = file.readLong(); long verificationTimestamp = file.readLong(); int numberOfTransactions = file.readInt(); List<Transaction> transactions = new ArrayList<>(); for (int i = 0; i < numberOfTransactions; i++) { transactions.add(Transaction.fromFile(file, blockHeight, previousBlockHash, false)); } byte[] balanceListHash = Message.getByteArray(file, FieldByteSize.hash); byte[] verifierIdentifier = Message.getByteArray(file, FieldByteSize.identifier); byte[] verifierSignature = Message.getByteArray(file, FieldByteSize.signature); // Transaction validation only needs to occur on blocks past the frozen edge. boolean validateTransactions = false; block = new Block(blockchainVersion, blockHeight, previousBlockHash, startTimestamp, verificationTimestamp, transactions, balanceListHash, verifierIdentifier, verifierSignature, validateTransactions); } catch (Exception ignored) { } return block; }
Example 10
Source File: AbstractFileCheckpointCollection.java From tracecompass with Eclipse Public License 2.0 | 5 votes |
/** * Constructs a new file header for an existing file * * @param randomAccessFile * the existing file * @throws IOException * if an I/O error occurs reading from the file */ public CheckpointCollectionFileHeader(RandomAccessFile randomAccessFile) throws IOException { fVersion = randomAccessFile.readInt(); fSize = randomAccessFile.readInt(); fNbEvents = randomAccessFile.readLong(); ByteBuffer b = ByteBuffer.allocate(MAX_TIME_RANGE_SERIALIZE_SIZE); b.clear(); fFileChannel.read(b); b.flip(); fTimeRange = new TmfTimeRange(TmfTimestamp.create(b), TmfTimestamp.create(b)); }
Example 11
Source File: DiskTreeReader.java From hortonmachine with GNU General Public License v3.0 | 5 votes |
/** * Reads the {@link STRtree} object from the file. * * @return the quadtree, holding envelops and geometry positions in the file. * @throws Exception */ public STRtree readIndex() throws Exception { File file = new File(path); raf = new RandomAccessFile(file, "r"); raf.seek(6L); checkVersions(); long position = INDEX_ADDRESS_POSITION; raf.seek(position); long indexAddress = raf.readLong(); position = INDEX_ADDRESS_POSITION + INDEX_ADDRESS_SIZE; raf.seek(position); long indexSize = raf.readLong(); raf.seek(indexAddress); byte[] indexBytes = new byte[(int) indexSize]; int read = raf.read(indexBytes); if (read != indexSize) { throw new IOException(); } ObjectInputStream in = new ObjectInputStream(new ByteArrayInputStream(indexBytes)); indexObj = (STRtree) in.readObject(); return indexObj; }
Example 12
Source File: BTree.java From btree4j with Apache License 2.0 | 4 votes |
@Override public synchronized void read(RandomAccessFile raf) throws IOException { super.read(raf); this._duplicateAllowed = raf.readBoolean(); this._rootPage = raf.readLong(); }
Example 13
Source File: ArchiveFile.java From birt with Eclipse Public License 1.0 | 4 votes |
protected void openArchiveForAppending( ) throws IOException { // we need upgrade the document RandomAccessFile rf = new RandomAccessFile( archiveName, "rw" ); if ( rf.length( ) == 0 ) { // this is a empty file af = new ArchiveFileV3( archiveName, rf, "rw" ); } else { try { long magicTag = rf.readLong( ); if ( magicTag == ARCHIVE_V2_TAG ) { af = new ArchiveFileV2( archiveName, rf, "rw+" ); } else if ( magicTag == ARCHIVE_V3_TAG ) { af = new ArchiveFileV3( archiveName, rf, "rw+" ); } else if ( isZipFile( magicTag ) ) { rf.close( ); zipOnClose = true; tmpFileName = getTmpFileName( ); unzip( archiveName, tmpFileName ); ArchiveFileV3 fs = new ArchiveFileV3( tmpFileName, "rw+" ); af = fs; } else { rf.close( ); upgradeArchiveV1( ); af = new ArchiveFileV3( archiveName, "rw+" ); } upgradeSystemId( af ); } catch ( IOException ex ) { rf.close( ); throw ex; } } }
Example 14
Source File: DiskFPSet.java From tlaplus with MIT License | 4 votes |
public void recover(String fname) throws IOException { RandomAccessFile chkptRAF = new BufferedRandomAccessFile( this.getChkptName(fname, "chkpt"), "r"); RandomAccessFile currRAF = new BufferedRandomAccessFile( this.fpFilename, "rw"); this.fileCnt = chkptRAF.length() / LongSize; int indexLen = (int) ((this.fileCnt - 1) / NumEntriesPerPage) + 2; this.index = new long[indexLen]; this.currIndex = 0; this.counter = 0; long fp = 0L; try { long predecessor = Long.MIN_VALUE; while (true) { fp = chkptRAF.readLong(); this.writeFP(currRAF, fp); // check invariant Assert.check(predecessor < fp, EC.SYSTEM_INDEX_ERROR); predecessor = fp; } } catch (EOFException e) { Assert.check(this.currIndex == indexLen - 1, EC.SYSTEM_INDEX_ERROR); this.index[indexLen - 1] = fp; } chkptRAF.close(); currRAF.close(); // reopen a BufferedRAF for each thread for (int i = 0; i < this.braf.length; i++) { // Better way would be to provide method BRAF.open // close and reopen this.braf[i].close(); this.braf[i] = new BufferedRandomAccessFile(this.fpFilename, "r"); } for (int i = 0; i < this.brafPool.length; i++) { // Better way would be to provide method BRAF.open // close and reopen this.brafPool[i].close(); this.brafPool[i] = new BufferedRandomAccessFile( this.fpFilename, "r"); } this.poolIndex = 0; }
Example 15
Source File: BTree.java From tracecompass with Eclipse Public License 2.0 | 4 votes |
private BTreeHeader(RandomAccessFile randomAccessFile) throws IOException { super(randomAccessFile); fRoot = randomAccessFile.readLong(); fSubVersion = randomAccessFile.readInt(); }
Example 16
Source File: BPlusTree.java From BPlusTree with Apache License 2.0 | 4 votes |
/** * Reads an existing file and generates a B+ configuration based on the stored values * * @param r file to read from * @param generateConf generate configuration? * @return new configuration based on read values (if enabled) or null * @throws IOException is thrown when an I/O operation fails * @throws InvalidBTreeStateException is thrown when there are inconsistencies in the blocks. */ private BPlusConfiguration readFileHeader(RandomAccessFile r, boolean generateConf) throws IOException, InvalidBTreeStateException { r.seek(0L); // read the header number int headerNumber = r.readInt(); if(headerNumber < 0) {throw new InvalidBTreeStateException("Negative header number found...");} // read the page size int pageSize = r.readInt(); if(pageSize < 0) {throw new InvalidBTreeStateException("Cannot create a tree with negative page size");} // read the entry size int entrySize = r.readInt(); if(entrySize <= 0) {throw new InvalidBTreeStateException("Entry size must be > 0");} // key size int keySize = r.readInt(); if(keySize > 8 || keySize < 4) {throw new InvalidBTreeStateException("Key size but be either 4 or 8 bytes");} // read the number of pages (excluding the lookup) totalTreePages = r.readLong(); if(totalTreePages < 0) {throw new InvalidBTreeStateException("Tree page number cannot be < 0");} // read the max page offset maxPageNumber = r.readLong(); if(maxPageNumber < 0 || (totalTreePages > 0 && maxPageNumber == 0)) {throw new InvalidBTreeStateException("Invalid max page offset");} // read the root index long rootIndex = r.readLong(); if(rootIndex < 0) {throw new InvalidBTreeStateException("Root can't have index < 0");} // read the next lookup page pointer this.firstPoolNextPointer = r.readLong(); // read the root. root = readNode(rootIndex); // finally if needed create a configuration file if(generateConf) {return(new BPlusConfiguration(pageSize, keySize, entrySize));} else {return(null);} }
Example 17
Source File: GEMFFile.java From osmdroid with Apache License 2.0 | 4 votes |
private void readHeader() throws IOException { final RandomAccessFile baseFile = mFiles.get(0); // Get file sizes for (final RandomAccessFile file : mFiles) { mFileSizes.add(file.length()); } // Version final int version = baseFile.readInt(); if (version != VERSION) { throw new IOException("Bad file version: " + version); } // Tile Size final int tile_size = baseFile.readInt(); if (tile_size != TILE_SIZE) { throw new IOException("Bad tile size: " + tile_size); } // Read Source List final int sourceCount = baseFile.readInt(); for (int i=0;i<sourceCount;i++) { final int sourceIndex = baseFile.readInt(); final int sourceNameLength = baseFile.readInt(); final byte[] nameData = new byte[sourceNameLength]; baseFile.read(nameData, 0, sourceNameLength); final String sourceName = new String(nameData); mSources.put(new Integer(sourceIndex), sourceName); } // Read Ranges final int num_ranges = baseFile.readInt(); for (int i=0;i<num_ranges;i++) { final GEMFRange rs = new GEMFRange(); rs.zoom = baseFile.readInt(); rs.xMin = baseFile.readInt(); rs.xMax = baseFile.readInt(); rs.yMin = baseFile.readInt(); rs.yMax = baseFile.readInt(); rs.sourceIndex = baseFile.readInt(); rs.offset = baseFile.readLong(); mRangeData.add(rs); } }
Example 18
Source File: Lobstack.java From jelectrum with MIT License | 4 votes |
public Lobstack(File dir, String name, boolean compress, int key_step_size) throws IOException { this.key_step_size = key_step_size; this.dir = dir; this.stack_name = name; this.compress = compress; if (!dir.exists()) { throw new java.io.IOException("Directory does not exist: " + dir); } if (!dir.isDirectory()) { throw new java.io.IOException("Location is not a directory: " + dir); } data_files = new AutoCloseLRUCache<Long, FileChannel>(MAX_OPEN_FILES); RandomAccessFile root_file = new RandomAccessFile(new File(dir, name + ".root"), MODE); root_file_channel = root_file.getChannel(); if (root_file.length()==0) { root_file.setLength(16); reset(); } else { synchronized(ptr_lock) { root_file.seek(ROOT_ROOT_LOCATION); current_root = root_file.readLong(); root_file.seek(ROOT_WRITE_LOCATION); current_write_location = root_file.readLong(); } } showSize(); }
Example 19
Source File: FeatureVector.java From sgdtk with Apache License 2.0 | 3 votes |
/** * Read a dense vector in from a file. Working memory will be allocated underneath. Note that, for this reason, * OverlappedTrainingRunner does not use this memory, but instead uses a pre-allocated work buffer, which is resized * as necessary * * @param input A file * @return * @throws IOException */ public static FeatureVector deserializeDenseFrom(RandomAccessFile input) throws IOException { int sz = (int)input.readLong(); byte[] b = new byte[sz]; input.read(b, 0, sz); FeatureVector fv = deserializeDense(b); return fv; }
Example 20
Source File: FeatureVector.java From sgdtk with Apache License 2.0 | 3 votes |
/** * Read a sparse vector in from a file. Working memory will be allocated underneath. Note that, for this reason, * OverlappedTrainingRunner does not use this memory, but instead uses a pre-allocated work buffer, which is resized * as necessary * * @param input A file * @return * @throws IOException */ public static FeatureVector deserializeSparseFrom(RandomAccessFile input) throws IOException { int sz = (int)input.readLong(); byte[] b = new byte[sz]; input.read(b, 0, sz); FeatureVector fv = deserializeSparse(b); return fv; }