Java Doc for MemoryBlockStore.java in  » Database-DBMS » Quadcap-Embeddable-Database » com » quadcap » sql » file » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database DBMS » Quadcap Embeddable Database » com.quadcap.sql.file   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    com.quadcap.sql.file.BlockStore       com.quadcap.sql.file.MemoryBlockStore MemoryBlockStore public class MemoryBlockStore extends BlockStore (Code) Below the cache, this class handles the actual I/O to the underlying file. Block write operations are logged by this class. author:    Stan Bailes Field Summary  LongMap blocks      Constructor Summary public   MemoryBlockStore()      Method Summary public  void close()      public  void flush()      public  void init(File file, String mode, int blockSize, Object lock)      Initialize a new BlockStore object using the specified file and blocksize. public  boolean isEncrypted()      public  void read(long blockNum, byte[] buf, int off)      Read a block into a buffer. public  void restore(long blockNum, byte[] buf, int off)      public static  String rw()      public  void setKey(com.quadcap.crypto.SymmetricKey key)      public  void setLength(long length)      public  String toString()      public  void write(long blockNum, byte[] buf)      Write a block from a buffer into the file. Field Detail blocks LongMap blocks(Code) Constructor Detail MemoryBlockStore public MemoryBlockStore()(Code) Method Detail close public void close() throws IOException(Code) flush public void flush() throws IOException(Code) init public void init(File file, String mode, int blockSize, Object lock) throws IOException(Code) Initialize a new BlockStore object using the specified file and blocksize. Parameters:   file - the underlying file. Parameters:   mode - "r" for readonly access, otherwise "rw" Parameters:   blocksize - the block size to use when creating the file. Parameters:   the - synchronization object isEncrypted public boolean isEncrypted()(Code) read public void read(long blockNum, byte[] buf, int off) throws IOException(Code) Read a block into a buffer. If the specified block is beyond the current end of file, then grow the file Parameters:   blockNum - the number of the block to read. Parameters:   buf - the buffer into which the data is read. restore public void restore(long blockNum, byte[] buf, int off) throws IOException(Code) Restore a block image rw public static String rw()(Code) setKey public void setKey(com.quadcap.crypto.SymmetricKey key) throws IOException(Code) setLength public void setLength(long length) throws IOException(Code) toString public String toString()(Code) write public void write(long blockNum, byte[] buf) throws IOException(Code) Write a block from a buffer into the file. Parameters:   blockNum - the number of the block to write. Parameters:   buf - the buffer from which the data is written. exception:   IOException - if an I/O error occurs. Fields inherited from com.quadcap.sql.file.BlockStore int blockSize(Code)(Java Doc) boolean encrypted(Code)(Java Doc) File file(Code)(Java Doc) FileRandomAccess fra(Code)(Java Doc) boolean isTempFile(Code)(Java Doc) Object lock(Code)(Java Doc) Log log(Code)(Java Doc) BitSet modified(Code)(Java Doc) public static int readCount(Code)(Java Doc) boolean readOnly(Code)(Java Doc) public static int writeCount(Code)(Java Doc) Methods inherited from com.quadcap.sql.file.BlockStore public int blockSize()(Code)(Java Doc) public void clearModified() throws IOException(Code)(Java Doc) public void close() throws IOException(Code)(Java Doc) public void flush() throws IOException(Code)(Java Doc) public File getFile()(Code)(Java Doc) public Log getLog()(Code)(Java Doc) public String getName()(Code)(Java Doc) public void init(File file, String mode, int blockSize, Object lock) throws IOException(Code)(Java Doc) public boolean isEncrypted()(Code)(Java Doc) final protected byte[] newHeader(int blockSize, long lastBlock)(Code)(Java Doc) public void read(long blockNum, byte[] buf) throws IOException(Code)(Java Doc) public void read(long blockNum, byte[] buf, int off) throws IOException(Code)(Java Doc) public void restore(long blockNum, byte[] buf, int off) throws IOException(Code)(Java Doc) public static String rw()(Code)(Java Doc) public void setKey(com.quadcap.crypto.SymmetricKey key) throws IOException(Code)(Java Doc) public void setLength(long length) throws IOException(Code)(Java Doc) public void setLog(Log log)(Code)(Java Doc) public String toString()(Code)(Java Doc) public void write(long blockNum, byte[] buf) throws IOException(Code)(Java Doc) Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)