Examples of ptolemy.kernel.util.Workspace$AccessRecord

ptolemy.kernel.util.Workspace
code that reads } finally { _workspace.doneReading(); } We assume that the _workspace variable references the workspace, as for example in the NamedObj class. The getReadAccess() method suspends the current thread if another thread is currently modifying the workspace, and otherwise returns immediately. Note that multiple readers can simultaneously have read access. The finally clause is executed even if an exception occurs. This is essential because without the call to doneReading(), the workspace will never again allow any thread to modify it.
To make safe changes to the objects in a workspace, a thread must write-synchronize using the following code:
```
 try { _workspace.getWriteAccess(); // ... code that writes } finally { _workspace.doneWriting(); } 
```
Again, the call to doneWriting() is essential, or the workspace will remain permanently locked to either reading or writing.
Note that it is not necessary to obtain a write lock just to add an item to the workspace directory. The methods for accessing the directory are all synchronized, so there is no risk of any thread reading an inconsistent state. @author Edward A. Lee, Mudit Goel, Lukito Muliadi, Xiaojun Liu @version $Id: Workspace.java,v 1.108 2006/09/21 15:45:37 cxh Exp $ @since Ptolemy II 0.2 @Pt.ProposedRating Green (liuxj) @Pt.AcceptedRating Green (liuxj)

                try {
                    _writePending = Thread.currentThread();
                    _director.threadBlocked(_writePending, this,
                            PNDirector.WRITE_BLOCKED);


                    Workspace workspace = getContainer().workspace();
                    workspace.wait(_director);
                } catch (InterruptedException e) {
                    _terminate = true;
                }
            }

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     */
    public Object clone(Workspace workspace) throws CloneNotSupportedException {
        ExecShellEffigy newObject = (ExecShellEffigy) super.clone(workspace);


        if (_model != null) {
            newObject._model = (NamedObj) _model.clone(new Workspace());
        }


        return newObject;
    }

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                // Create the class.
                Class newClass = Class.forName(arg);


                // Instantiate the specified class in a new workspace.
                Workspace workspace = new Workspace();


                // Get the constructor that takes a Workspace argument.
                Class[] argTypes = new Class[1];
                argTypes[0] = workspace.getClass();


                Constructor constructor = newClass.getConstructor(argTypes);


                Object[] args = new Object[1];
                args[0] = workspace;

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    public Object clone(Workspace workspace) throws CloneNotSupportedException {
        PythonShellEffigy newObject = (PythonShellEffigy) super
                .clone(workspace);


        if (_model != null) {
            newObject._model = (NamedObj) _model.clone(new Workspace());
        }


        return newObject;
    }

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     */
    public Object clone(Workspace workspace) throws CloneNotSupportedException {
        TclShellEffigy newObject = (TclShellEffigy) super.clone(workspace);


        if (_model != null) {
            newObject._model = (NamedObj) _model.clone(new Workspace());
        }


        return newObject;
    }

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     */
    public Object clone(Workspace workspace) throws CloneNotSupportedException {
        PtolemyEffigy newObject = (PtolemyEffigy) super.clone(workspace);


        if (_model != null && !(_model instanceof Configuration)) {
            newObject._model = (NamedObj) _model.clone(new Workspace());
        }


        return newObject;
    }

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                NamedObj entity = getEntity("blank");
                Attribute attribute = getAttribute("blank");
                NamedObj newModel;


                if (entity != null) {
                    newModel = (NamedObj) entity.clone(new Workspace());


                    // The cloning process results an object that defers change
                    // requests.  By default, we do not want to defer change
                    // requests, but more importantly, we need to execute
                    // any change requests that may have been queued
                    // during cloning. The following call does that.
                    newModel.setDeferringChangeRequests(false);
                } else if (attribute != null) {
                    newModel = (NamedObj) attribute.clone(new Workspace());


                    // The cloning process results an object that defers change
                    // requests.  By default, we do not want to defer change
                    // requests, but more importantly, we need to execute
                    // any change requests that may have been queued
                    // during cloning. The following call does that.
                    newModel.setDeferringChangeRequests(false);
                } else {
                    newModel = new TypedCompositeActor(new Workspace());
                }


                // The model should have a parser associated with it
                // so that undo works. The following method will create
                // a parser, if there isn't one already.

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                // Create the class.
                Class newClass = Class.forName(arg);


                // Instantiate the specified class in a new workspace.
                Workspace workspace = new Workspace();


                //Workspace workspace = _configuration.workspace();
                // Get the constructor that takes a Workspace argument.
                Class[] argTypes = new Class[1];
                argTypes[0] = workspace.getClass();


                Constructor constructor = newClass.getConstructor(argTypes);


                Object[] args = new Object[1];
                args[0] = workspace;

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     *  by the getVersion() method of the workspace of the associated
     *  actor), then reconstruct it. Otherwise, do nothing.
     *  @see ptolemy.kernel.util.Workspace#getVersion()
     */
    protected final void _validate() {
        Workspace workspace = getContainer().workspace();
        long workspaceVersion = workspace.getVersion();


        if (_functionDependencyVersion != workspaceVersion) {
            try {
                workspace.getReadAccess();
                _constructDependencyGraph();
                _functionDependencyVersion = workspaceVersion;
            } finally {
                workspace.doneReading();
            }
        }


        // NOTE: the current design of the version control is
        // to synchronize with the workspace. It is based on the

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    public Object clone(Workspace workspace) throws CloneNotSupportedException {
        ExpressionShellEffigy newObject = (ExpressionShellEffigy) super
                .clone(workspace);


        if (_model != null) {
            newObject._model = (NamedObj) _model.clone(new Workspace());
        }


        return newObject;
    }

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