Java Code Examples for javax.faces.component.UIComponent#getFacetsAndChildren()

public List<UIComponent> findIdRecursively(UIComponent parent, String id) {
	if (null==parent)
		return null;
	List<UIComponent> result = new ArrayList<UIComponent>();
	boolean found = matches(id, parent);
	if (found) {
		result.add(parent);
	}
	Iterator<UIComponent> facetsAndChildren = parent.getFacetsAndChildren();
	while (facetsAndChildren.hasNext()) {
		UIComponent child = facetsAndChildren.next();
		List<UIComponent> subresult = findIdRecursively(child, id);
		if (null != subresult) result.addAll(subresult);
	}
	return result;
}
 

public List<UIComponent> findIdsRecursively(UIComponent parent, String id) {
	if (null==parent)
		return null;
	List<UIComponent> result = null;
	if (id.equals(parent.getId())) {
		result = new ArrayList<UIComponent>();
		result.add(parent);
	}
	Iterator<UIComponent> facetsAndChildren = parent.getFacetsAndChildren();
	while (facetsAndChildren.hasNext()) {
		UIComponent child = facetsAndChildren.next();
		List<UIComponent> childresult = findIdsRecursively(child, id);
		if (null != childresult && (!childresult.isEmpty())) {
			if (null == result) {
				result = new ArrayList<UIComponent>();
			}
			result.addAll(childresult);
		}
	}
	return result;
}
 

public List<UIComponent> findId(UIComponent parent, String id) {
	if (null==parent)
		return null;
	List<UIComponent> result = new ArrayList<UIComponent>();
	boolean found = matches(id, parent);
	if (found) {
		result.add(parent);
	}
	Iterator<UIComponent> facetsAndChildren = parent.getFacetsAndChildren();
	while (facetsAndChildren.hasNext()) {
		UIComponent child = facetsAndChildren.next();
	    found = matches(id, child);
		if (found) {
			result.add(child);
		}
	}
	return result;
}
 

private List<UIComponent> findComponentsByName(UIComponent c, String name) {
	List<UIComponent> result = new ArrayList<UIComponent>();
	Iterator<UIComponent> children = c.getFacetsAndChildren();
	while(children.hasNext()) {
		UIComponent comp = children.next();
		if (comp instanceof Radiobutton) {
			if (name.equals(((Radiobutton)comp).getName())) {
				result.add(comp);
			}
		}
		List<UIComponent> r = findComponentsByName(comp, name);
		if (!r.isEmpty()) {
			result.addAll(r);
		}
	}
	return result;
}
 

private void saveChildState(FacesContext faces, UIComponent c) {

		if (c instanceof EditableValueHolder && !c.isTransient()) {
			String clientId = c.getClientId(faces);
			SavedState ss = this.getChildState().get(clientId);
			if (ss == null) {
				ss = new SavedState();
				this.getChildState().put(clientId, ss);
			}
			ss.populate((EditableValueHolder) c);
		}

		// continue hack
		Iterator itr = c.getFacetsAndChildren();
		while (itr.hasNext()) {
			saveChildState(faces, (UIComponent) itr.next());
		}
	}
 

public static UIComponent findComponentById(UIComponent parent, String id) {
	if (id.equals(parent.getId())) {
		return parent;
	}
	Iterator<UIComponent> kids = parent.getFacetsAndChildren();
	while (kids.hasNext()) {
		UIComponent kid = kids.next();
		UIComponent found = findComponentById(kid, id);
		if (found != null) {
			return found;
		}
	}
	return null;
}
 

public UIComponent findId(UIComponent parent, String id) {
	if (null==parent)
		return null;
	if (id.equals(parent.getId())) {
		return parent;
	}
	Iterator<UIComponent> facetsAndChildren = parent.getFacetsAndChildren();
	while (facetsAndChildren.hasNext()) {
		UIComponent child = facetsAndChildren.next();
		if (id.equals(child.getId())) {
			return child;
		}
	}
	return null;
}
 

/**
 * Finds component with the given id
 */
public static UIComponent findComponent(UIComponent c, String id) {
	if (id.equals(c.getId())) {
		return c;
	}
	Iterator<UIComponent> kids = c.getFacetsAndChildren();
	while (kids.hasNext()) {
		UIComponent found = findComponent(kids.next(), id);
		if (found != null) {
			return found;
		}
	}
	return null;
}
 

private UIComponent findComponentByName(UIComponent c, String name) {
	Iterator<UIComponent> children = c.getFacetsAndChildren();
	while(children.hasNext()) {
		UIComponent comp = children.next();
		if (comp instanceof Radiobutton) {
			if (name.equals(((Radiobutton)comp).getName())) return comp;
		}
		UIComponent r = findComponentByName(comp, name);
		if (r != null) return r;
	}
	return null;
}
 

private void resetClientIdCacheRecursively(UIComponent c) {
	String id = c.getId();
	if (null != id) {
		c.setId(id); // this strange operation clears the cache of the clientId
	}
	Iterator<UIComponent> children = c.getFacetsAndChildren();
	if (children != null) {
		while (children.hasNext()) {
			UIComponent kid = children.next();
			resetClientIdCacheRecursively(kid);
		}
	}
}
 

private void removeChildState(FacesContext faces, UIComponent c) {
	String id = c.getId();
	c.setId(id);

	Iterator itr = c.getFacetsAndChildren();
	while (itr.hasNext()) {
		removeChildState(faces, (UIComponent) itr.next());
	}
	if (this.childState != null) {
		this.childState.remove(c.getClientId(faces));
	}
}
 

private void restoreChildState(FacesContext faces, UIComponent c) {
	// reset id
	String id = c.getId();
	c.setId(id);

	// hack
	if (c instanceof EditableValueHolder) {
		EditableValueHolder evh = (EditableValueHolder) c;
		String clientId = c.getClientId(faces);
		SavedState ss = this.getChildState().get(clientId);
		if (ss != null) {
			ss.apply(evh);
		} else {
			String childId = clientId.substring(initialClientId.length() + 1);
			childId = childId.substring(childId.indexOf(getSeparatorChar(faces)) + 1);
			childId = initialClientId + getSeparatorChar(faces) + childId;
			if (initialChildState.containsKey(childId)) {
				SavedState initialState = initialChildState.get(childId);
				initialState.apply(evh);
			} else {
				NullState.apply(evh);
			}
		}
	}

	// continue hack
	Iterator itr = c.getFacetsAndChildren();
	while (itr.hasNext()) {
		restoreChildState(faces, (UIComponent) itr.next());
	}
}
 

/**
 * Recursively create the initial state for the given component.
 * 
 * @param facesContext
 *            the Faces context.
 * @param component
 *            the UI component to save the state for.
 * @see #saveInitialChildState(javax.faces.context.FacesContext)
 */
private void saveInitialChildState(FacesContext facesContext, UIComponent component) {
	if (component instanceof EditableValueHolder && !component.isTransient()) {
		String clientId = component.getClientId(facesContext);
		SavedState state = new SavedState();
		initialChildState.put(clientId, state);
		state.populate((EditableValueHolder) component);
	}

	Iterator<UIComponent> iterator = component.getFacetsAndChildren();
	while (iterator.hasNext()) {
		saveChildState(facesContext, iterator.next());
	}
}
 

private void resetClientIds(UIComponent component) {
	Iterator<UIComponent> iterator = component.getFacetsAndChildren();
	while (iterator.hasNext()) {
		UIComponent child = iterator.next();
		resetClientIds(child);
		child.setId(child.getId());
	}
}
 

/**
 * Check all components in page to find one that has as resource library the
 * target library. I use this method to check existence of a BsF component
 * because, at this level, the getComponentResource returns always null
 *
 * @param parent    the parent component
 * @param targetLib the lib to search
 * @return
 */
public static UIComponent findBsfComponent(UIComponent parent, String targetLib) {
	if (targetLib.equalsIgnoreCase((String) parent.getAttributes().get("library"))) {
		return parent;
	}
	Iterator<UIComponent> kids = parent.getFacetsAndChildren();
	while (kids.hasNext()) {
		UIComponent found = findBsfComponent(kids.next(), targetLib);
		if (found != null) {
			return found;
		}
	}
	return null;
}
 

private UIComponent findComponent(UIComponent c, String id) {
    if (id.equals(c.getId())) {
        return c;
    }

    Iterator<UIComponent> childIt = c.getFacetsAndChildren();
    while (childIt.hasNext()) {
        UIComponent found = findComponent(childIt.next(), id);
        if (found != null) {
            return found;
        }
    }
    return null;
}