Examples of org.apache.cocoon.forms.formmodel.Widget

Package org.apache.cocoon.forms.formmodel

Examples of org.apache.cocoon.forms.formmodel.Widget

org.apache.cocoon.forms.formmodel.Widget
Interface to be implemented by Widgets. In CForms, a form consists of a number of widgets. Each widget:
- has an id, unique within its parent context widget. See {@link #getId()}.
- can have a parent (see {@link #getParent()}.
- can hold a value (which can be any kind of object). See {@link #getValue()}.
- can read its value from a request object (and convert it from a string to its native type). See {@link #readFromRequest(FormContext)}.
- can validate itself. See {@link #validate()}.
- can generate an XML representation of itself.
When a request is submitted, first the {@link #readFromRequest(FormContext)} method of all widgetswill be called so that they can read their value(s). Next, the {@link #validate()} method willbe called. Doing this in two steps allows the validation to compare values between widgets. See also the method {@link Form#process(FormContext)}.

A Widget is created by calling the createInstance method on the a {@link WidgetDefinition}. A Widget holds all the data that is specific for a certain use of the widget (its value, validationerrors, ...), while the WidgetDefinition holds the data that is static accross all widgets. This keeps the Widgets small and light to create. This mechanism is similar to classes and objects in Java. @version $Id: Widget.java 155210 2005-02-24 17:02:09Z sylvain $

     * Adds a widget not contained in a repeater.
     * @param context
     * @param path
     */
    private void addSimpleWidget(Widget context, String path) {
        Widget widget = context.lookupWidget(path);
        if (widget == null) throw new IllegalArgumentException("Cannot find a widget with path " + path + " relative to widget " + context.getName());
        if (this.noRepeaterWidgets == null) this.noRepeaterWidgets = new ArrayList();
        this.noRepeaterWidgets.add(widget);
        newAdditions.add(widget);        
    }

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    //---------------------------------------------------------------------------------------------
    // Widget management
    //---------------------------------------------------------------------------------------------


    public Widget getWidgetForPath(TreePath path) {
        Widget result = (Widget)this.pathWidgets.get(path);
        if (result == null && !this.pathWidgets.containsKey(path)) {
            result = createWidgetForPath(path);
            if (result != null) {
                result.setAttribute("TreePath", path);
            }
            this.pathWidgets.put(path, result);
        }


        return result;

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    protected Widget selectWidget(Widget parent, String id) {
        if (id == null) {
            return parent;
        }


        Widget childWidget = parent.lookupWidget(id);
        if (childWidget == null) {
            String containerId = parent.getRequestParameterName();
            if (containerId == null || "".equals(containerId)) {
                containerId = "top-level form-widget";
            } else {

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     */
    public Object put(Object key, Object value) {
        String name = (String)key;
        if (lowerCase) name = name.toLowerCase();
        
        Widget w = container.getChild(name);
        if (w != null) {
            return setValue(w, value);
        } else {
            throw new UnsupportedOperationException(container + " has no child named '" + key + "'");
        }

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        Iterator iter = map.entrySet().iterator();
        while(iter.hasNext()) {
            Map.Entry entry = (Map.Entry)iter.next();
            String name = (String)entry.getKey();
            if (lowerCase) name = name.toLowerCase();
            Widget w = container.getChild(name);
            if (w != null) {
                setValue(w, entry.getValue());
            }
        }
    }

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    }


    public Object get(Object key) {
        String name = (String)key;
        if (lowerCase) name = name.toLowerCase();
        Widget w = container.getChild(name);
        return w == null ? null : asValueOrMap(w);
    }

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    /**
     * Actively performs the binding from the ObjectModel wrapped in a jxpath
     * context to the CForms-form-widget specified in this object.
     */
    public void doLoad(Widget frmModel, JXPathContext jxpc) throws BindingException {
        Widget widget = selectWidget(frmModel, this.fieldId);
        if (widget == null) {
            throw new BindingException("The widget with the ID [" + this.fieldId
                    + "] referenced in the binding does not exist in the form definition.");
        }
        if (!(widget instanceof Tree)) throw new BindingException("Widget " + this.fieldId + " is not a Tree!");

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        if (this.currentWidget == null) {
            // The name of the root element is ignored
            this.currentWidget = this.widget;


        } else if (this.currentWidget instanceof ContainerWidget) {
            Widget child = ((ContainerWidget)this.currentWidget).getChild(loc);
            if (child == null) {
                throw new SAXException("There is no widget with id: " + loc +
                                       " as child to: " + this.currentWidget.getId());
            }
            this.currentWidget = child;

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            if (childBindings != null) {
                int size = childBindings.length;
                identity = new ArrayList(size);
                for (int i = 0; i < size; i++) {
                    String fieldId = ((ValueJXPathBinding) childBindings[i]).getFieldId();
                    Widget widget = row.lookupWidget(fieldId);
                    Object value = widget.getValue();
                    identity.add(value);
                }
            }
        }
        return identity;

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    //---------------------------------------------------------------------------------------------
    // Widget management
    //---------------------------------------------------------------------------------------------


    public Widget getWidgetForPath(TreePath path) {
        Widget result = (Widget)this.pathWidgets.get(path);
        if (result == null && !this.pathWidgets.containsKey(path)) {
            result = createWidgetForPath(path);
            if (result != null) {
                result.setAttribute("TreePath", path);
            }
            this.pathWidgets.put(path, result);
        }


        return result;

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