wjhk.jupload2.context
Class JavascriptHandler

java.lang.Object
  java.lang.Thread
      wjhk.jupload2.context.JavascriptHandler

All Implemented Interfaces:

java.lang.Runnable

public class JavascriptHandler
extends java.lang.Thread

Separate thread spawned by the (signed) applet at initialization time so it will run in a context with the same privileges. Does nothing but wait to be notified of the presence of a command to be executed in the jsCommand String variable.

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Thread

java.lang.Thread.State, java.lang.Thread.UncaughtExceptionHandler

Field Summary

static java.lang.String	COMMAND_START_UPLOAD Command code, for upload.
private java.lang.String	jsCommand The current command, or null if the thread is not currently running command.
private JUploadPanel	jUploadPanel Reference to the main panel of the applet.
static java.lang.String	RETURN_BUSY One return code for doCommand: indicates that the thread is busy, and can execute this command.
static java.lang.String	RETURN_STARTED One return code for doCommand: indicates that the thread is busy, and can execute this command.
private UploadPolicy	uploadPolicy Reference to the current upload policy.

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

JavascriptHandler(UploadPolicy uploadPolicy, JUploadPanel theJUploadPanel)
Constructor for JavascriptHandler

Method Summary

void	clearCommand() Synchronized method allows for safely clearing jsCommand string
java.lang.String	doCommand(java.lang.String command) Method for passing a command (String) to be executed (asynchronously) by the run() method of this object's thread.
void	doWait() Synchronized method to enable call to wait()
java.lang.String	getCommand() Synchronized method allows for safely accessing jsCommand string
void	run() Method to run when thread is started.

Methods inherited from class java.lang.Thread

activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getAllStackTraces, getContextClassLoader, getDefaultUncaughtExceptionHandler, getId, getName, getPriority, getStackTrace, getState, getThreadGroup, getUncaughtExceptionHandler, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setDefaultUncaughtExceptionHandler, setName, setPriority, setUncaughtExceptionHandler, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

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

Field Detail

COMMAND_START_UPLOAD

public static final java.lang.String COMMAND_START_UPLOAD

Command code, for upload.

See Also:

Constant Field Values

RETURN_BUSY

public static final java.lang.String RETURN_BUSY

One return code for doCommand: indicates that the thread is busy, and can execute this command.

See Also:

Constant Field Values

RETURN_STARTED

public static final java.lang.String RETURN_STARTED

One return code for doCommand: indicates that the thread is busy, and can execute this command.

See Also:

Constant Field Values

uploadPolicy

private UploadPolicy uploadPolicy

Reference to the current upload policy.

jUploadPanel

private JUploadPanel jUploadPanel

Reference to the main panel of the applet.

jsCommand

private java.lang.String jsCommand

The current command, or null if the thread is not currently running command.

Constructor Detail

JavascriptHandler

public JavascriptHandler(UploadPolicy uploadPolicy,
                         JUploadPanel theJUploadPanel)

Constructor for JavascriptHandler

Parameters:

uploadPolicy - The current upload policy. Used for debug output.

theJUploadPanel - Whose methods will will be invoked in order to execute the received commands

Method Detail

doCommand

public java.lang.String doCommand(java.lang.String command)

Method for passing a command (String) to be executed (asynchronously) by the run() method of this object's thread. Commands are accepted only if there is no previous command still executing. (Commands are not queued.) Return value indicates if command was successfully submitted.

Parameters:

command -

Returns:

the command string argument on success, empty string on failure.

getCommand

public java.lang.String getCommand()

Synchronized method allows for safely accessing jsCommand string

Returns:

Returns the current command

clearCommand

public void clearCommand()

Synchronized method allows for safely clearing jsCommand string

doWait

public void doWait()
            throws java.lang.InterruptedException

Synchronized method to enable call to wait()

Throws:

java.lang.InterruptedException

run

public void run()

Method to run when thread is started.

Specified by:

run in interface java.lang.Runnable

Overrides:

run in class java.lang.Thread