org.netbeans.editor.ext

Class FileAccessor

java.lang.Object

org.netbeans.editor.ext.FileAccessor

All Implemented Interfaces:

DataAccessor

public class FileAccessor
extends Object
implements DataAccessor

DataAccessor for Code Completion DB files via RandomAccessFile implementation

Constructor Summary

Constructors

Constructor and Description
FileAccessor(File file) Creates a new instance of FileAccessor

Method Summary

Modifier and Type	Method and Description
void	append(byte[] buffer, int off, int len) Appends exactly len bytes, starting at off of the buffer pointer to the end of file resource.
void	close() Closes DataAccessor file resource
int	getFileLength()
long	getFilePointer() Returns the current offset in this file.
void	open(boolean requestWrite) Opens DataAccessor file resource
void	read(byte[] buffer, int off, int len) Reads up to len bytes of data from this file resource into an array of bytes.
void	resetFile() Clears the file and sets the offset to 0
void	seek(long pos) Sets the file-pointer offset, measured from the beginning of this file, at which the next read or write occurs.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

FileAccessor

public FileAccessor(File file)

Creates a new instance of FileAccessor

Method Detail

append

public void append(byte[] buffer,
                   int off,
                   int len)
            throws IOException

Appends exactly len bytes, starting at off of the buffer pointer to the end of file resource.

Specified by:

append in interface DataAccessor

Parameters:

buffer - the buffer from which the data is appended.

off - the start offset of the data in the buffer.

len - the number of bytes to append.

Throws:

IOException

read

public void read(byte[] buffer,
                 int off,
                 int len)
          throws IOException

Reads up to len bytes of data from this file resource into an array of bytes.

Specified by:

read in interface DataAccessor

Parameters:

buffer - the buffer into which the data is read.

off - the start offset of the data.

len - the maximum number of bytes read.

Throws:

IOException

open

public void open(boolean requestWrite)
          throws IOException

Opens DataAccessor file resource

Specified by:

open in interface DataAccessor

Parameters:

requestWrite - if true, file is opened for read/write operation.

Throws:

IOException

close

public void close()
           throws IOException

Closes DataAccessor file resource

Specified by:

close in interface DataAccessor

Throws:

IOException

getFilePointer

public long getFilePointer()
                    throws IOException

Returns the current offset in this file.

Specified by:

getFilePointer in interface DataAccessor

Returns:

the offset from the beginning of the file, in bytes, at which the next read or write occurs.

Throws:

IOException

resetFile

public void resetFile()
               throws IOException

Clears the file and sets the offset to 0

Specified by:

resetFile in interface DataAccessor

Throws:

IOException

seek

public void seek(long pos)
          throws IOException

Description copied from interface: DataAccessor

Sets the file-pointer offset, measured from the beginning of this file, at which the next read or write occurs.

Specified by:

seek in interface DataAccessor

Throws:

IOException

getFileLength

public int getFileLength()

Specified by:

getFileLength in interface DataAccessor

toString

public String toString()

Overrides:

toString in class Object