Module com.thecoderscorner.tcmenu.javaapi

Package com.thecoderscorner.menu.domain.util

Class MenuItemHelper

java.lang.Object

com.thecoderscorner.menu.domain.util.MenuItemHelper

public class MenuItemHelper
extends Object

A helper class for dealing with MenuItem objects. This class provides the helper for visiting menu items and returning a result. It also provides other helpers for dealing with items.

Constructor Summary

Constructors

Constructor	Description
MenuItemHelper()

Method Summary

Modifier and Type	Method	Description
static SubMenuItem	asSubMenu(MenuItem item)	Returns the menu item as a sub menu or null
static MenuItem	createFromExistingWithId(MenuItem selected, int newId)	creates a copy of the menu item chosen, with the ID changed to newId
static int	eepromSizeForItem(MenuItem item)	Gets the size of the eeprom storage for a given element type
static <T> T	getValueFor(MenuItem item, MenuTree tree, T def)
static boolean	isRuntimeStructureNeeded(MenuItem item)	Check if the item is based on a runtime item
static AnyMenuState	stateForMenuItem(MenuItem item, Object val, boolean changed, boolean active)
static AnyMenuState	stateForMenuItem(AnyMenuState existingState, MenuItem item, Object val)
static AnyMenuState	stateForMenuItem(AnyMenuState existingState, MenuItem item, Object val, boolean changed)
static <T> Optional<T>	visitWithResult(MenuItem item, AbstractMenuItemVisitor<T> visitor)	Visits a menu item calling the appropriate function for the type and collects the result that is set by calling your visitor's `setResult` method.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

MenuItemHelper

public MenuItemHelper()

Method Details

visitWithResult

public static <T> Optional<T> visitWithResult(MenuItem item,
 AbstractMenuItemVisitor<T> visitor)

Visits a menu item calling the appropriate function for the type and collects the result that is set by calling your visitor's `setResult` method.

Type Parameters:

T - the return type

Parameters:

item - the item to be visited

visitor - the visitor that will be used

Returns:

an optional of the return type, set to empty unless setResult was called.

asSubMenu

public static SubMenuItem asSubMenu(MenuItem item)

Returns the menu item as a sub menu or null

Parameters:

item - the possible sub menu

Returns:

the sub menu, or null.

isRuntimeStructureNeeded

public static boolean isRuntimeStructureNeeded(MenuItem item)

Check if the item is based on a runtime item

Parameters:

item - the item to check

Returns:

true if runtime based, otherwise false.

createFromExistingWithId

public static MenuItem createFromExistingWithId(MenuItem selected,
 int newId)

creates a copy of the menu item chosen, with the ID changed to newId

Parameters:

selected - the item to copy

newId - the ID for the copy

Returns:

the newly created item

eepromSizeForItem

public static int eepromSizeForItem(MenuItem item)

Gets the size of the eeprom storage for a given element type

Parameters:

item - the item to determine eeprom size for

Returns:

the eeprom storage needed.

stateForMenuItem

public static AnyMenuState stateForMenuItem(AnyMenuState existingState,
 MenuItem item,
 Object val)

stateForMenuItem

public static AnyMenuState stateForMenuItem(AnyMenuState existingState,
 MenuItem item,
 Object val,
 boolean changed)

stateForMenuItem

public static AnyMenuState stateForMenuItem(MenuItem item,
 Object val,
 boolean changed,
 boolean active)

getValueFor

public static <T> T getValueFor(MenuItem item,
 MenuTree tree,
 T def)