Examples of org.apache.wicket.model.PropertyModel

org.apache.wicket.model.PropertyModel
A PropertyModel is used to dynamically access a model using a "property expression". See {@link PropertyResolver} javadoc for allowed property expressions.
For example, take the following bean:
```
 public class Person { private String name; public String getName() { return name; } public void setName(String name) { this.name = name; } } 
```
We could construct a label that dynamically fetches the name property of the given person object like this:
```
 Person person = getSomePerson(); ... add(new Label("myLabel", new PropertyModel(person, "name")); 
```
Where 'myLabel' is the name of the component, and 'name' is the property expression to get the name property.

In the same fashion, we can create form components that work dynamically on the given model object. For instance, we could create a text field that updates the name property of a person like this:
```
 add(new TextField("myTextField", new PropertyModel(person, "name")); 
```
Note that the property resolver by default provides access to private members and methods. If guaranteeing encapsulation of the target objects is a big concern, you should consider using an alternative implementation.
@see PropertyResolver @see IModel @see Model @see LoadableDetachableModel @author Chris Turner @author Eelco Hillenius @author Jonathan Locke @param < T> The Model object type

          .toString();
      }
    });


    // Add the label
    add(counter = new Label("counter", new PropertyModel(this, "count")));
  }

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   * @see IColumn#newCell(MarkupContainer, String, TreeNode, int)
   */
  @Override
  public Component newCell(MarkupContainer parent, String id, TreeNode node, int level)
  {
    return new EditablePanel(id, new PropertyModel(node, getPropertyExpression()));
  }

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        window.setCookieName("view-task-win");


        Form paginatorForm = new Form("PaginatorForm");


        final DropDownChoice rowsChooser = new DropDownChoice(
                "rowsChooser", new PropertyModel(this, "paginatorRows"), prefMan.getPaginatorChoices());


        rowsChooser.add(new AjaxFormComponentUpdatingBehavior("onchange") {


            private static final long serialVersionUID = -1107858522700306810L;

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                item.add(new Label("label", new ResourceModel(field.getName())));


                final AbstractFieldPanel component;
                try {
                    if (field.getClassList() != null) {
                        component = new AjaxDropDownChoicePanel("field", field.getName(), new PropertyModel(policy,
                                field.getName()));


                        final List<String> rules = correlationRules.getObject();


                        if (rules != null && !rules.isEmpty()) {
                            ((AjaxDropDownChoicePanel) component).setChoices(correlationRules.getObject());
                        }


                        item.add(component);


                        item.add(getActivationControl(
                                component,
                                propDesc.getReadMethod().invoke(policy, new Object[]{}) != null,
                                null,
                                null));


                    } else if (field.getType().isEnum()) {
                        component = new AjaxDropDownChoicePanel("field", field.getName(), new PropertyModel(policy,
                                field.getName()));


                        final Serializable[] values = (Serializable[]) field.getType().getEnumConstants();


                        if (values != null && values.length > 0) {
                            ((AjaxDropDownChoicePanel) component).setChoices(Arrays.asList(values));
                        }


                        item.add(component);


                        item.add(getActivationControl(
                                component,
                                (Enum<?>) propDesc.getReadMethod().invoke(policy, new Object[]{}) != null,
                                values[0],
                                values[0]));


                    } else if (field.getType().equals(boolean.class) || field.getType().equals(Boolean.class)) {
                        item.add(new AjaxCheckBoxPanel("check", field.getName(), new PropertyModel(policy,
                                field.getName())));


                        item.add(new Label("field", new Model(null)));
                    } else if (Collection.class.isAssignableFrom(field.getType())) {
                        if (field.getSchemaList() != null) {
                            final List<String> values = new ArrayList<String>();
                            if (field.getName().charAt(0) == 'r') {
                                values.addAll(roleSchemas.getObject());


                                if (field.getSchemaList().extended()) {
                                    values.add("name");
                                }
                            } else {
                                values.addAll(userSchemas.getObject());


                                if (field.getSchemaList().extended()) {
                                    values.add("id");
                                    values.add("username");
                                }
                            }


                            Collection collection =
                                    (Collection) propDesc.getReadMethod().invoke(policy, new Object[]{});


                            if (collection == null) {
                                collection = new ArrayList();
                                propDesc.getWriteMethod().invoke(policy, collection);
                            }


                            component = new AjaxPalettePanel("field", new PropertyModel(policy, field.getName()),
                                    new ListModel<String>(values));
                            item.add(component);


                            item.add(getActivationControl(component,
                                    !collection.isEmpty(), new ArrayList<String>(), new ArrayList<String>()));
                        } else {
                            final FieldPanel panel = new AjaxTextFieldPanel("panel", field.getName(),
                                    new Model<String>(null));
                            panel.setRequired(true);


                            component = new MultiValueSelectorPanel<String>("field",
                                    new PropertyModel(policy, field.getName()), panel);


                            item.add(component);


                            final List<String> reinitializedValue = new ArrayList<String>();


                            reinitializedValue.add("");


                            item.add(getActivationControl(component,
                                    !((Collection) propDesc.getReadMethod().invoke(policy, new Object[]{})).isEmpty(),
                                    new ArrayList<String>(), (Serializable) reinitializedValue));
                        }
                    } else if (field.getType().equals(int.class) || field.getType().equals(Integer.class)) {
                        component = new AjaxTextFieldPanel("field", field.getName(),
                                new PropertyModel(policy, field.getName()));


                        item.add(component);


                        item.add(getActivationControl(component,
                                (Integer) propDesc.getReadMethod().invoke(policy, new Object[]{}) > 0, 0, 0));

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        Form approvalPaginatorForm = new Form("approvalPaginatorForm");


        MetaDataRoleAuthorizationStrategy.authorize(approvalPaginatorForm, RENDER, xmlRolesReader.getAllAllowedRoles(
                "Approval", "list"));


        final DropDownChoice rowsChooser = new DropDownChoice("rowsChooser", new PropertyModel(this,
                "approvalPaginatorRows"), prefMan.getPaginatorChoices());


        rowsChooser.add(new AjaxFormComponentUpdatingBehavior("onchange") {


            private static final long serialVersionUID = -1107858522700306810L;

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        Form userRequestPaginatorForm = new Form("userRequestPaginatorForm");


        MetaDataRoleAuthorizationStrategy.authorize(userRequestPaginatorForm, RENDER, xmlRolesReader.getAllAllowedRoles(
                "UserRequest", "list"));


        final DropDownChoice rowsChooser = new DropDownChoice("rowsChooser", new PropertyModel(this,
                "userRequestPaginatorRows"), prefMan.getPaginatorChoices());


        rowsChooser.add(new AjaxFormComponentUpdatingBehavior("onchange") {


            private static final long serialVersionUID = -1107858522700306810L;

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        form.add(cancel);
    }


    private FieldPanel buildSinglePanel(final Class<?> type, final String fieldName, final String id) {
        FieldPanel result = null;
        PropertyModel model = new PropertyModel(ReportletConfModalPage.this.reportletConf, fieldName);
        if (Boolean.TYPE.equals(type) || Boolean.class.equals(type)) {
            result = new AjaxCheckBoxPanel(id, fieldName, model);
        } else if (Integer.TYPE.equals(type) || Integer.class.equals(type) || Long.TYPE.equals(type)
                || Long.class.equals(type) || Double.TYPE.equals(type) || Double.class.equals(type)) {

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                        panel = new AjaxPalettePanel("value", new PropertyModel<List<String>>(
                                ReportletConfModalPage.this.reportletConf, fieldName), new ListModel<String>(choices),
                                true);
                    } else if (listItemType.isEnum()) {
                        panel = new CheckBoxMultipleChoiceFieldPanel("value", new PropertyModel(
                                ReportletConfModalPage.this.reportletConf, fieldName), new ListModel(Arrays
                                .asList(listItemType.getEnumConstants())));
                    } else {
                        if (((List) wrapper.getPropertyValue(fieldName)).isEmpty()) {
                            ((List) wrapper.getPropertyValue(fieldName)).add(null);

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    public ConfigurationModalPage(final PageReference pageRef, final ModalWindow window,
            final ConfigurationTO configurationTO, final boolean createFlag) {


        Form form = new Form("form", new CompoundPropertyModel(configurationTO));


        final AjaxTextFieldPanel key = new AjaxTextFieldPanel("key", "key", new PropertyModel(configurationTO, "key"));
        form.add(key);
        key.setEnabled(createFlag);
        key.addRequiredLabel();


        final AjaxTextFieldPanel value = new AjaxTextFieldPanel("value", "value", new PropertyModel(configurationTO,
                "value"));
        form.add(value);


        submit = new IndicatingAjaxButton("apply", new Model<String>(getString("submit"))) {

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            item.add(new Label("operationType", ""));
        } else {
            item.add(new Label("operationType", searchCondition.getOperationType().toString()));
        }


        final CheckBox notOperator = new CheckBox("notOperator", new PropertyModel(searchCondition, "notOperator"));
        notOperator.add(new AjaxFormComponentUpdatingBehavior("onchange") {


            private static final long serialVersionUID = -1107858522700306810L;


            @Override

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