Examples of ptolemy.data.expr.FileParameter

ptolemy.data.expr.FileParameter
This is an attribute that specifies a file or URL. The value of this attribute, accessed by getExpression(), is a string that names a file or URL, possibly containing references to variables defined in scope using the syntax $ID, ${ID} or $(ID). The value returned by getToken() is name of the file with such references resolved.

If this attribute contains a parameter named allowFiles with value false, then when a file browser is used to select a file, that file browser will be set to not show files (only directories will be shown). If this attribute contains a parameter named allowDirectories with value true, then the file browser will permit the user to select directories (the default behavior is that when a directory is selected, that directory is opened and its contained files and directories are listed).

If the model containing this attribute has been saved to a MoML file, then the file name can be given relative to the directory containing that MoML file. If the model has not been saved to a file, then the classpath is used for identifying relative file names.

Files can be given relative to a base, where the base is the URI of the first container above this one that has a URIAttribute. Normally, this URI specifies the file or URL containing the model definition. Thus, files that are referred to here can be kept in the same directory as the model, or in a related directory, and can moved together with the model.

The following special file names are understood:
- System.in: Standard input.
- System.out: Standard output.
Note, however, that these file names cannot be converted to URLs using the asURL() method. A file name can also contain the following strings that start with "$", which get substituted with the appropriate values.
$CWDThe current working directoryuser.dir$HOMEThe user's home directoryuser.home$PTIIThe home directory of the Ptolemy II installationptolemy.ptII.dir$TMPDIRThe temporary directoryjava.io.tmpdir

String Description Property

The above properties are normally set when a Ptolemy II application starts.

If a file name begins with the reference "$CLASSPATH", then when the file is opened for reading, the openForReading() method will search for the file relative to the classpath (using the getResource() method of the current class loader). This will only work for a file that exists, and thus the openForWriting() method will not understand the "$CLASSPATH" string; this makes sense since the classpath typically has several directories, and it would not be obvious where to create the file. The asURL() method also recognizes the "$CLASSPATH" string, but not the asFile() method (which is typically used when accessing a file for writing). NOTE: If the container of this parameter also contains a variable named CLASSPATH, then the value of that variable is used instead of the Java classpath.
@author Edward A. Lee @version $Id: FileParameter.java,v 1.37 2007/12/07 06:31:22 cxh Exp $ @since Ptolemy II 4.0 @Pt.ProposedRating Green (eal) @Pt.AcceptedRating Yellow (cxh) @see URIAttribute

        super(container, name);


        _initializePtalonActor();


        setClassName("ptolemy.actor.ptalon.PtalonActor");
        ptalonCodeLocation = new FileParameter(this, "ptalonCodeLocation");
    }

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        parameter = new StringParameter(this, "display");
        parameter.setDisplayName("Display (./)");
        parameter.setPersistent(false);
        parameter.setVisibility(NONE);


        directory = new FileParameter(this, "directory");
        directory.setDisplayName("Directory");
        directory.setExpression(".");
        directory.addValueListener(this);
        Parameter allowFiles = new Parameter(directory, "allowFiles");
        allowFiles.setTypeEquals(BaseType.BOOLEAN);

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     *  @see FileParameter
     */
    protected void _help() {
        try {
            Configuration configuration = getConfiguration();
            FileParameter helpAttribute = (FileParameter) configuration
                    .getAttribute("_helpDocViewer", FileParameter.class);
            URL doc;


            if (helpAttribute != null) {
                doc = helpAttribute.asURL();
            } else {
                doc = getClass().getClassLoader().getResource(helpFile);
            }


            configuration.openModel(null, doc, doc.toExternalForm());

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        styleSheetParameters = new PortParameter(this, "styleSheetParameters");
        styleSheetParameters.setTypeAtMost(new RecordType(new String[0],
                new Type[0]));
        styleSheetParameters.setExpression("emptyRecord()");
        styleSheetFile = new FileParameter(this, "styleSheetFile");


    }

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     *  @return the URL of the HTML file that was searched.
     *  @exception Exception If there is a problem opening a model.
     */
    public static URL _expandLibrary(String regexp,
            Configuration configuration) throws Exception {
        FileParameter aboutAttribute = (FileParameter) configuration
            .getAttribute("_about", FileParameter.class);


        URL baseURL = null;
        URL modelURL = null;


        // HyVisual, VisualSense: Search for models in the _about
        // attribute of the configuration.
        // If we don't have an _about, or _about returns
        // no models, then look in the complete demos location


        if (aboutAttribute != null) {
            baseURL = aboutAttribute.asURL();
            String aboutURLString = baseURL.toExternalForm();
            String base = aboutURLString.substring(0,
                    aboutURLString.lastIndexOf("/"));
            baseURL = MoMLApplication.specToURL(base + "/intro.htm");
            System.out.println("HTMLAbout._expandLibrary(): looking in about URL: " + baseURL);

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     */
    public void createEditor(NamedObj object, Frame parent) {


        ComponentDialog dialog = null;


        FileParameter helpFileParameter = (FileParameter) object
                .getAttribute("help");


        String[] buttons = _moreButtons;
        if (helpFileParameter == null) {
            // Do not include the help button.
            buttons = _moreButtonsNoHelp;
        }


        dialog = new ComponentDialog(parent, "Edit Parameters or File",
                createEditorPane(), buttons);


        String button = dialog.buttonPressed();


        if (button.equals("Cancel")) {
            return;
        }


        if (button.equals(_moreButtons[0])) {
            new EditParametersDialog(parent, object);
            return;
        }


        Configuration configuration = (Configuration) Configuration.findEffigy(
                object.getContainer()).toplevel();


        if (button.equals(_moreButtons[1])) {
            FileParameter fileOrURLParameter = (FileParameter) object
                    .getAttribute("fileOrURL");
            if (fileOrURLParameter == null) {
                throw new InternalErrorException(object, null,
                        "No \"fileOrURL\" attribute.");
            } else {
                try {
                    if (fileOrURLParameter.asURL() == null) {
                        ModelDirectory directory = configuration.getDirectory();


                        StringParameter initialDefaultContentsParameter = (StringParameter) object
                                .getAttribute("initialDefaultContents");
                        String defaultText = "";
                        if (initialDefaultContentsParameter != null) {
                            defaultText = initialDefaultContentsParameter
                                    .getExpression();
                        }
                        Effigy effigy = TextEffigy.newTextEffigy(directory,
                                defaultText);
                        configuration.createPrimaryTableau(effigy);


                        //                         EffigyFactory textEffigyFactory = new TextEffigy.Factory(directory, "effigyFactory");
                        //                         Tableau tableau = configuration.openModel(
                        //                                 null, null, "Unnamed",
                        //                                 textEffigyFactory);
                        //                         Effigy effigy = (Effigy) tableau.getContainer();
                        //                         effigy.masterEffigy().setModifiable(true);
                        //                         System.out.println("FileOrURLEditorFactory: modifiable"
                        //                                            + effigy.isModifiable() + " " + effigy);


                    } else {
                        URL fileURL = fileOrURLParameter.asFile().toURI()
                                .toURL();
                        configuration.openModel(null, fileURL, fileURL
                                .toExternalForm());
                    }
                } catch (Exception ex) {

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        input.setTypeEquals(BaseType.OBJECT);


        _icon = new ImageIcon(this, "_icon");
        _icon.setPersistent(false);
        FileParameter source = new FileParameter(this, "source");
        source
                .setExpression("$CLASSPATH/ptolemy/vergil/kernel/attributes/ptIIplanetIcon.gif");
        URL url = source.asURL();
        Toolkit tk = Toolkit.getDefaultToolkit();
        Image image = tk.getImage(url);
        _icon.setImage(image);
    }

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        ModelDirectory directory = getDirectory();


        if (directory != null) {
            try {
                Configuration configuration = getConfiguration();
                FileParameter aboutAttribute = (FileParameter) configuration
                        .getAttribute("_about", FileParameter.class);
                URL doc;


                if (aboutAttribute != null) {
                    doc = aboutAttribute.asURL();
                } else {
                    doc = getClass().getClassLoader().getResource(aboutFile);
                }


                // The usual mechanism for opening a file is:

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    protected Image _getDefaultIconImage() {
        if (_defaultIconImage == null) {
            URL url = null;
            try {
                Configuration configuration = getConfiguration();
                FileParameter iconAttribute = (FileParameter) configuration
                        .getAttribute("_applicationIcon", FileParameter.class);


                if (iconAttribute != null) {
                    url = iconAttribute.asURL();
                }
            } catch (Throwable ex) {
                // Ignore, we will set url to the default.
            }
            if (url == null) {

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     *  @see FileParameter
     */
    protected void _help() {
        try {
            Configuration configuration = getConfiguration();
            FileParameter helpAttribute = (FileParameter) configuration
                    .getAttribute("_help", FileParameter.class);
            URL doc;


            if (helpAttribute != null) {
                doc = helpAttribute.asURL();
            } else {
                doc = getClass().getClassLoader().getResource(helpFile);
            }


            configuration.openModel(null, doc, doc.toExternalForm());

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Related Classes of ptolemy.data.expr.FileParameter

ptolemy.actor.gt.DefaultDirectoryAttribute

ptolemy.actor.gt.DefaultModelAttribute

ptolemy.actor.gui.FileOrURLEditorFactory

ptolemy.actor.gui.HTMLAbout

ptolemy.actor.gui.PtolemyFrame

ptolemy.actor.gui.TableauFrame

ptolemy.actor.lib.Exec

ptolemy.actor.lib.gui.ModelDisplay

ptolemy.actor.lib.hoc.ApplyFilterOverArray

ptolemy.actor.lib.image.ImageReader

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