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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.IDFile IDFile public class IDFile (Code) Class supplying access to an ID file. An ID file maps IDs (integers >= 1) to file pointers (long integers). There is a direct correlation between IDs and the position at which the file pointers are stored; the file pointer for ID X is stored at position 8*X. author:    Arjohn Kampman Constructor Summary public   IDFile(File file)      public   IDFile(File file, boolean forceSync)      Method Summary public  void clear()      Discards all stored data. public  void close()      Closes the ID file, releasing any file locks that it might have. final public  File getFile()      public  int getMaxID()      Gets the largest ID that is stored in this ID file. public  long getOffset(int id)      Gets the offset of the data entry with the specified ID. Parameters:   id - The ID to get the offset for, must be larger than 0. public  void setOffset(int id, long offset)      Sets or updates the stored offset for the specified ID. public  int storeOffset(long offset)      Stores the offset of a new data entry, returning the ID under which is stored. public  void sync()      Syncs any unstored data to the hash file. Constructor Detail IDFile public IDFile(File file) throws IOException(Code) IDFile public IDFile(File file, boolean forceSync) throws IOException(Code) Method Detail clear public void clear() throws IOException(Code) Discards all stored data. throws:   IOException - If an I/O error occurred. close public void close() throws IOException(Code) Closes the ID file, releasing any file locks that it might have. throws:   IOException - getFile final public File getFile()(Code) getMaxID public int getMaxID() throws IOException(Code) Gets the largest ID that is stored in this ID file. The largest ID, or 0 if the file does not contain anydata. throws:   IOException - If an I/O error occurs. getOffset public long getOffset(int id) throws IOException(Code) Gets the offset of the data entry with the specified ID. Parameters:   id - The ID to get the offset for, must be larger than 0. The offset for the ID. setOffset public void setOffset(int id, long offset) throws IOException(Code) Sets or updates the stored offset for the specified ID. Parameters:   id - The ID to set the offset for, must be larger than 0. Parameters:   offset - The (new) offset for the specified ID. storeOffset public int storeOffset(long offset) throws IOException(Code) Stores the offset of a new data entry, returning the ID under which is stored. sync public void sync() throws IOException(Code) Syncs any unstored data to the hash file. 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)