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Java Source Code / Java Documentation » Scripting » jacl » tcl.lang 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   tcl.lang.Extension

All known Subclasses:   test.tjc.TJCExtension,  tcl.lang.JavaTestExtension,  tcl.lang.BlendExtension,  tests.javaload.Test1Extension,  tcl.lang.TclParserExtension,  test.tjcext.TJCExtension,  itcl.lang.ItclExtension,
Extension
abstract public class Extension (Code)
Base class for all Tcl Extensions. A Tcl Extension defines a set of commands that can be loaded into an Interp as a single unit. When a Tcl Extension is loaded into an Interp, either statically (using the "new" operator inside Java code) or dynamically (using the java::load command in Tcl scripts), it usually creates a set of commands inside the interpreter. Occasionally, loading an Extension may lead to additional side effects. For example, a communications Extension may open network connections when it's loaded. Please refer to the documentation of the specific Extension for details.



Constructor Summary
public  Extension()
     Default constructor.

Method Summary
abstract public  voidinit(Interp interp)
     Initialize the Extension to run in a normal (unsafe) interpreter.
final public static  voidloadOnDemand(Interp interp, String cmdName, String clsName)
     Create a stub command which autoloads the real command the first time the stub command is invoked.
public  voidsafeInit(Interp safeInterp)
     Initialize the Extension to run in a safe interpreter.


Constructor Detail
Extension
public Extension()(Code)
Default constructor. Does nothing. The purpose of this constructor is to make sure instances of this Extension can be loaded dynamically using the "java::load" command, which calls Class.newInstance().




Method Detail
init
abstract public void init(Interp interp) throws TclException(Code)
Initialize the Extension to run in a normal (unsafe) interpreter. This usually means creating all the commands provided by this class. A particular implementation can arrange the commands to be loaded on-demand using the loadOnDemand() function.
Parameters:
  interp - current interpreter.



loadOnDemand
final public static void loadOnDemand(Interp interp, String cmdName, String clsName)(Code)
Create a stub command which autoloads the real command the first time the stub command is invoked. Register the stub command in the interpreter.
Parameters:
  interp - current interp.
Parameters:
  cmdName - name of the command, e.g., "after".
Parameters:
  clsName - name of the Java class that implements this command,e.g. "tcl.lang.AfterCmd"



safeInit
public void safeInit(Interp safeInterp) throws TclException(Code)
Initialize the Extension to run in a safe interpreter. This method should be written carefully, so that it initializes the safe interpreter only with partial functionality provided by the Extension that is safe for use by untrusted code. The default implementation always throws a TclException, so that a subclass of Extension cannot be loaded into a safe interpreter unless it has overridden the safeInit() method.
Parameters:
  safeInterp - the safe interpreter in which the Extension shouldbe initialized.



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)

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