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Java Source Code / Java Documentation » RSS RDF » sesame » org.openrdf.sail.nativerdf.datastore   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    org.openrdf.sail.nativerdf.datastore.DataStore DataStore public class DataStore (Code) Class that provides indexed storage and retrieval of arbitrary length data. author:    Arjohn Kampman Constructor Summary public   DataStore(File dataDir, String filePrefix)      public   DataStore(File dataDir, String filePrefix, boolean forceSync)      Method Summary public  void clear()      Removes all values from the DataStore. public  void close()      Closes the DataStore, releasing any file references, etc. public  byte[] getData(int id)      Gets the value for the specified ID. Parameters:   id - A value ID, should be larger than 0. public  int getID(byte[] queryData)      Gets the ID for the specified value. Parameters:   queryData - The value to get the ID for, must not be null. public  int getMaxID()      Returns the maximum value-ID that is in use. public static  void main(String[] args)      public  int storeData(byte[] data)      Stores the supplied value and returns the ID that has been assigned to it. In case the data to store is already present, the ID of this existing data is returned. Parameters:   data - The data to store, must not be null. public  void sync()      Synchronizes any recent changes to the data to disk. Constructor Detail DataStore public DataStore(File dataDir, String filePrefix) throws IOException(Code) DataStore public DataStore(File dataDir, String filePrefix, boolean forceSync) throws IOException(Code) Method Detail clear public void clear() throws IOException(Code) Removes all values from the DataStore. exception:   IOException - If an I/O error occurred. close public void close() throws IOException(Code) Closes the DataStore, releasing any file references, etc. In case a transaction is currently open, it will be rolled back. Once closed, the DataStore can no longer be used. exception:   IOException - If an I/O error occurred. getData public byte[] getData(int id) throws IOException(Code) Gets the value for the specified ID. Parameters:   id - A value ID, should be larger than 0. The value for the ID, or null if no such value could befound. exception:   IOException - If an I/O error occurred. getID public int getID(byte[] queryData) throws IOException(Code) Gets the ID for the specified value. Parameters:   queryData - The value to get the ID for, must not be null. The ID for the specified value, or -1 if no such IDcould be found. exception:   IOException - If an I/O error occurred. getMaxID public int getMaxID() throws IOException(Code) Returns the maximum value-ID that is in use. The largest ID, or 0 if the store does not contain anyvalues. throws:   IOException - If an I/O error occurs. main public static void main(String[] args) throws Exception(Code) storeData public int storeData(byte[] data) throws IOException(Code) Stores the supplied value and returns the ID that has been assigned to it. In case the data to store is already present, the ID of this existing data is returned. Parameters:   data - The data to store, must not be null. The ID that has been assigned to the value. exception:   IOException - If an I/O error occurred. sync public void sync() throws IOException(Code) Synchronizes any recent changes to the data to disk. exception:   IOException - If an I/O error occurred. 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)