Examples of com.volantis.mcs.interaction.BaseProxy

com.volantis.mcs.interaction.BaseProxy
A proxy for an abstract class within the model.
A base proxy is used when the underlying model can reference (through an abstract class) an instance of a number of different concrete classes. Each different concrete class could require a different proxy to represent it and over the lifetime of the model the instance (and the class of that instance) may change a number of times. When this happens new proxies for these objects would need to be created. As the user interface typically has references to the proxies it would need to listen for changes in the containing proxy and update itself accordingly. This could be very awkward to do and so would likely not be done correctly and would very easily lead to problems and instability within the user interface. The base proxy aims to simplify the problem.

Once it has been created from a containing class a base proxy never changes (unless parent proxy is changed by the user interface). It also will never create an underlying model object as it does not know what type to create. However, when the underlying model object is set then it will automatically create the necessary proxy objects for it. The base proxy also provides a stable place to register listeners.


    /**
     * Update the theme model from the GUI.
     */
    private void updateThemeModel() {
        BaseProxy baseContentProxy = (BaseProxy) context.getSelectedVariant().getPropertyProxy(PolicyModel.CONTENT);
        Proxy contentProxy = baseContentProxy.getConcreteProxy();
        if (contentProxy != null) {
            BeanProxy contentBeanProxy = (BeanProxy) contentProxy;
            Proxy importParent = contentBeanProxy.getPropertyProxy(ThemeModel.IMPORT_PARENT_DEVICE_THEME);
            importParent.setModelObject(Boolean.valueOf(importParentCheckbox.getSelection()));
        } else {

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            oldRules.removeDiagnosticListener(tableRefresher);
        }
        ruleTable.setInput(null);


        if (!nullType && deviceTheme != null) {
            BaseProxy content = (BaseProxy) deviceTheme.getPropertyProxy(PolicyModel.CONTENT);
            BeanProxy concreteContent = (BeanProxy) content.getConcreteProxy();
            if (concreteContent == null && !content.isReadOnly()) {
                ThemeContentBuilder contentModel =
                        InternalPolicyFactory.getInternalInstance().createThemeContentBuilder();
                content.setModelObject(contentModel);
                concreteContent = (BeanProxy) content.getConcreteProxy();
            }


            if (concreteContent != null) {
                BeanProxy styleSheet = (BeanProxy) concreteContent.
                        getPropertyProxy(ThemeModel.STYLE_SHEET);

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        }
    }


    private BeanProxy getSelectedStyleSheetProxy() {
        BeanProxy variant = context.getSelectedVariant();
        BaseProxy content = (BaseProxy) variant.getPropertyProxy(PolicyModel.CONTENT);
        BeanProxy concreteContent = (BeanProxy) content.getConcreteProxy();
        if (concreteContent == null) {
            ThemeContentBuilder contentModel =
                    InternalPolicyFactory.getInternalInstance().createThemeContentBuilder();
            content.setModelObject(contentModel);
            concreteContent = (BeanProxy) content.getConcreteProxy();
        }


        return (BeanProxy) concreteContent.getPropertyProxy(ThemeModel.STYLE_SHEET);
    }

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     * then an attempt is made to set the input correctly (from the currently
     * selected variant).
     */
    private void refreshRuleTable() {
        if (ruleTable.getInput() == null) {
            BaseProxy contentBase = (BaseProxy) context.getSelectedVariant().
                    getPropertyProxy(PolicyModel.CONTENT);
            Proxy concreteContent = contentBase.getConcreteProxy();
            if (concreteContent != null) {
                BeanProxy themeContent = (BeanProxy) concreteContent;
                BeanProxy styleSheet = (BeanProxy) themeContent.
                        getPropertyProxy(ThemeModel.STYLE_SHEET);
                Proxy rules = styleSheet.getPropertyProxy(ThemeModel.RULES);

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         *         found.
         */
        private ListProxy getRulesFromVariant(BeanProxy variant) {
            ListProxy rules = null;


            BaseProxy content = (BaseProxy)
                    variant.getPropertyProxy(PolicyModel.CONTENT);
            BeanProxy themeContent = (BeanProxy) content.getConcreteProxy();
            if (themeContent != null) {
                BeanProxy stylesheet = (BeanProxy)
                        themeContent.getPropertyProxy(ThemeModel.STYLE_SHEET);
                rules = (ListProxy) stylesheet.
                        getPropertyProxy(ThemeModel.RULES);

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        boolean enabled;
        if (newVariantType == VariantType.NULL) {


            BeanProxy selectedVariant = context.getSelectedVariant();
            if (selectedVariant != null) {
                BaseProxy metadataBase =
                    (BaseProxy)selectedVariant
                        .getPropertyProxy(PolicyModel.META_DATA);
                if (metadataBase != null) {
                    Operation setValue =
                        metadataBase.prepareSetModelObjectOperation(null);
                    context.executeOperation(setValue);
                }
            }


            enabled = false;

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     */
    private BeanProxy getMetadataProxy() {
        BeanProxy metadataProxy = null;
        BeanProxy selectedVariant = context.getSelectedVariant();
        if (selectedVariant != null) {
            BaseProxy metadataBase = (BaseProxy) selectedVariant.getPropertyProxy(PolicyModel.META_DATA);
            if (metadataBase != null) {
                metadataProxy = (BeanProxy) metadataBase.getConcreteProxy();
                // If we have no concrete metadata, create an empty one of the
                // appropriate type unless the data is read only or the variant
                // type precludes this.
                Proxy typeProxy = selectedVariant.getPropertyProxy(PolicyModel.VARIANT_TYPE);
                if (metadataProxy == null && !metadataBase.isReadOnly() &&
                        typeProxy.getModelObject() != VariantType.NULL) {
                    MetaDataBuilder metaDataBuilder = getDefaultMetaDataBuilder();
                    metadataBase.setModelObject(metaDataBuilder);


                    // Now that we've set a concrete model object, we should
                    // have a concrete proxy.
                    metadataProxy = (BeanProxy) metadataBase.getConcreteProxy();
                }
            }
        }
        return metadataProxy;
    }

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     */
    private Proxy getSelectionProxy() {
        Proxy selectionProxy = null;
        BeanProxy selectedVariant = context.getSelectedVariant();
        if (selectedVariant != null) {
            BaseProxy selectionBase = (BaseProxy) selectedVariant.getPropertyProxy(PolicyModel.SELECTION);
            if (selectionBase != null) {
                selectionProxy = selectionBase.getConcreteProxy();
                // If we have no concrete metadata, create an empty one of the
                // appropriate type
                if (selectionProxy == null) {
                    SelectionBuilder selection = getDefaultSelectionBuilder();
                    selectionBase.setModelObject(selection);


                    // Now that we've set a concrete model object, we should
                    // have a concrete proxy.
                    selectionProxy = selectionBase.getConcreteProxy();
                }
            }
        }
        return selectionProxy;
    }

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