org.glassfish.pfl.basic.tools.file
Class FileWrapper

java.lang.Object
  org.glassfish.pfl.basic.tools.file.FileWrapper

All Implemented Interfaces:

Closeable

public class FileWrapper
extends Object
implements Closeable

File wrapper for text files. Makes it really easy to open, close, delete, read, and write text files.

Nested Class Summary

static class	FileWrapper.FileState
static class	FileWrapper.OpenMode

Constructor Summary

FileWrapper(File file)
Create a new FileWrapper for the given File.

FileWrapper(File root, String str)

FileWrapper(String str)

Method Summary

boolean	canWrite()
void	close() Close the file, and set its state to CLOSED.
void	copyTo(FileWrapper target, byte[] buffer) Copy this file to target using buffer to hold data.
void	delete()
String	getAbsoluteName()
FileWrapper.FileState	getFileState()
String	getName()
void	open(FileWrapper.OpenMode mode) Open the (text) file for I/O.
byte[]	readAll()
String	readLine() Read the next line from the text file.
String	toString()
void	writeAll(byte[] data)
void	writeLine(String line) Write the line to the end of the file, including a newline.

Methods inherited from class java.lang.Object

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

Constructor Detail

FileWrapper

public FileWrapper(File file)

Create a new FileWrapper for the given File. Represents the same file in the filesystem as the underlying File object. getBase() return the FileWrapper for the file system root.

Parameters:

file - File to wrap

FileWrapper

public FileWrapper(String str)

FileWrapper

public FileWrapper(File root,
                   String str)

Method Detail

canWrite

public boolean canWrite()

toString

public String toString()

Overrides:

toString in class Object

delete

public void delete()

getName

public String getName()

getAbsoluteName

public String getAbsoluteName()

readAll

public byte[] readAll()
               throws IOException

Throws:

IOException

writeAll

public void writeAll(byte[] data)
              throws IOException

Throws:

IOException

readLine

public String readLine()
                throws IOException

Read the next line from the text file. File state must be FileState OPEN_FOR_READ. Returns null when at the end of file.

Returns:

The String just read.

Throws:

IOException - for IO errors.

writeLine

public void writeLine(String line)
               throws IOException

Write the line to the end of the file, including a newline. File state must be FileState OPEN_FOR_WRITE.

Parameters:

line - The line to write.

Throws:

IOException - for IO errors.

close

public void close()

Close the file, and set its state to CLOSED. This method does not throw any exceptions.

Specified by:

close in interface Closeable

open

public void open(FileWrapper.OpenMode mode)
          throws IOException

Open the (text) file for I/O. There are two modes:

• READ. In this mode, the file is prepared for reading, starting from the beginning. end-of-file at the time the file is opened.
• WRITE. In this mode, the file is prepared for writing, starting at the end of the file.

Parameters:

mode - READ or WRITE mode.

Throws:

IOException - for IO exceptions.

getFileState

public FileWrapper.FileState getFileState()

copyTo

public void copyTo(FileWrapper target,
                   byte[] buffer)
            throws IOException

Copy this file to target using buffer to hold data. Does not assume we are using text files.

Parameters:

target - The FileWrapper to copy data to.

buffer - The buffer to use for copying the files.

Throws:

IOException - for IO exceptions.