Examples with ObjectProperty com.vaadin.data.util.ObjectProperty used on opensource projects

Example 1 with ObjectProperty

use of com.vaadin.data.util.ObjectProperty in project opennms by OpenNMS.

the class SelectableItem method getPropertyDescriptors.

/**
 * <b>Note:</b>This method is simmilar to
 * {@link com.vaadin.data.util.BeanItem#getPropertyDescriptors(java.lang.Class)
 * }
 * but adds an additional <code>VaadinPropertyDescriptor</codE> to support a
 * "is selectable" feature. Because the earlier mentioned method is static,
 * we cannot overwrite it. Therefore I decided to implement it in my own
 * way.<br/>
 * <br/>
 *
 * <b>In short:</b> It lookups all methods which fullfill the java bean
 * convention of <code>clazz</code> and builds accessors for it (read
 * method, write method, etc. for a field, etc. Have a look at
 * {@link java.beans.Introspector}). And in addition we a new "accessor" for
 * a selectable item is added.<br/>
 * <br/>
 *
 * <b>In detail:</b><br/>
 * {@link java.beans.Introspector} is used to get all PropertyDescriptors
 * from the given class <code>clazz</code>. Each PropertyDescriptor is
 * converted to a vaadin <code>MethodPropertyDescriptor</code>(
 * {@link com.vaadin.data.util.MethodPropertyDescriptor} is created. In
 * addition a VaadinPropertyDescriptor is added to provide the "select"
 * feature. For this we use the <code>ObjectProperty</code> of vaadin. <br/>
 * <br/>
 *
 * The build map is a mapping between property names and the
 * <code>VaadinPropertyDescriptor</code>s, whereby
 * {@link com.vaadin.data.util.VaadinPropertyDescriptor#getName()} is
 * identically with the key of the returned map (and therefore represents
 * the property name).
 *
 * @param <T>
 * @param clazz
 * @return
 */
protected static <T> Map<String, VaadinPropertyDescriptor> getPropertyDescriptors(Class<? super T> clazz) {
    Map<String, VaadinPropertyDescriptor> mpdMap = new HashMap<String, VaadinPropertyDescriptor>();
    try {
        // add all available method property descriptors
        for (PropertyDescriptor pd : Introspector.getBeanInfo(clazz).getPropertyDescriptors()) {
            MethodPropertyDescriptor mpd = new MethodPropertyDescriptor<T>(pd.getName(), pd.getPropertyType(), pd.getReadMethod(), pd.getWriteMethod());
            mpdMap.put(pd.getName(), mpd);
        }
        // add selected property descriptor
        mpdMap.put("selected", new VaadinPropertyDescriptor<T>() {

            @Override
            public String getName() {
                return "selected";
            }

            @Override
            public Class<?> getPropertyType() {
                return Boolean.class;
            }

            @Override
            public com.vaadin.data.Property createProperty(T value) {
                return new ObjectProperty(false, Boolean.class, false);
            }
        });
    } catch (IntrospectionException ex) {
        LOG.warn("Error while introspecting class '{}'. Will continue anyway, result may not be complete.", clazz);
    }
    return mpdMap;
}