au.com.prunge.jgenfile.impl
Class ConstantCanGetFileSizeOperation

java.lang.Object
  |
  +--au.com.prunge.jgenfile.impl.AbstractOperation
        |
        +--au.com.prunge.jgenfile.impl.AbstractItemOperation
              |
              +--au.com.prunge.jgenfile.impl.AbstractFileOperation
                    |
                    +--au.com.prunge.jgenfile.impl.ConstantCanGetFileSizeOperation

All Implemented Interfaces:

CanGetFileSizeOperation, ConstantOperation, FileOperation, ItemOperation, Operation

public class ConstantCanGetFileSizeOperation

extends AbstractFileOperation

implements CanGetFileSizeOperation, ConstantOperation

A can get file size operation that returns either true or false for canGetSize().

Version:

1.0

Author:

Peter Runge

Constructor Summary

ConstantCanGetFileSizeOperation(au.com.prunge.jgenfile.File file, boolean canGetSize)
Constructs a ConstantCanGetFileSizeOperation.

Method Summary

boolean	canGetSize() Returns whether the size of the file can be acquired.
void	runImpl() The actual run() implementation goes in this method.

Methods inherited from class au.com.prunge.jgenfile.impl.AbstractFileOperation

getFile

Methods inherited from class au.com.prunge.jgenfile.impl.AbstractItemOperation

getItem

Methods inherited from class au.com.prunge.jgenfile.impl.AbstractOperation

abort, addOperationHints, checkRun, getLastRunException, getOperationHint, getOperationHints, hasRun, run, setLastRunException, setOperationHint, setOperationHints

Methods inherited from class java.lang.Object

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

Methods inherited from interface au.com.prunge.jgenfile.FileOperation

getFile

Methods inherited from interface au.com.prunge.jgenfile.ItemOperation

getItem

Methods inherited from interface au.com.prunge.jgenfile.Operation

abort, addOperationHints, getLastRunException, getOperationHint, getOperationHints, hasRun, run, setOperationHint, setOperationHints

Constructor Detail

ConstantCanGetFileSizeOperation

public ConstantCanGetFileSizeOperation(au.com.prunge.jgenfile.File file,
                                       boolean canGetSize)

Constructs a ConstantCanGetFileSizeOperation.

Parameters:

file - the file this operation is for.

Method Detail

canGetSize

public boolean canGetSize()
                   throws OperationNotFinishedException,
                          JGenFileException

Description copied from interface: CanGetFileSizeOperation

Returns whether the size of the file can be acquired.

Specified by:

canGetSize in interface CanGetFileSizeOperation

Returns:

true if the size can be acquired, false if not.

Throws:

JGenFileException - if another error occurs.

OperationNotFinishedException - if this method was called and the run() method has not finished or has not been called.

See Also:

CanGetFileSizeOperation.canGetSize()

runImpl

public void runImpl()
             throws JGenFileException

Description copied from class: AbstractOperation

The actual run() implementation goes in this method. Setting the last run exception and setting hasRun to true is not required by this method as it is handled by the run() method in this class.

If this method completes successfully (i.e. without throwing an exception), the last run exception is set to null indicating no exception occurred and subsequent calls to hasRun() will return true.

If this method throws an exception, the last run exception is filled in and hasRun() subsequent calls to hasRun() will return false.

Specified by:

runImpl in class AbstractOperation

Throws:

JGenFileException - if an error occurs.

See Also:

au.com.prunge.jgenfile.AbstractOperation#runImpl()