类 CustomMapEditor

构造器详细资料

• CustomMapEditor

  public CustomMapEditor​(Class<? extends Map> mapType)

  Create a new CustomMapEditor for the given target type, keeping an incoming null as-is.

  参数:

  mapType - the target type, which needs to be a sub-interface of Map or a concrete Map class

  另请参阅:

  Map, HashMap, TreeMap, LinkedHashMap

• CustomMapEditor

  public CustomMapEditor​(Class<? extends Map> mapType,
                         boolean nullAsEmptyMap)

  Create a new CustomMapEditor for the given target type.

  If the incoming value is of the given type, it will be used as-is. If it is a different Map type or an array, it will be converted to a default implementation of the given Map type. If the value is anything else, a target Map with that single value will be created.

  The default Map implementations are: TreeMap for SortedMap, and LinkedHashMap for Map.

  参数:

  mapType - the target type, which needs to be a sub-interface of Map or a concrete Map class

  nullAsEmptyMap - ap whether to convert an incoming null value to an empty Map (of the appropriate type)

  另请参阅:

  Map, TreeMap, LinkedHashMap

方法详细资料

• setAsText

  public void setAsText​(String text)
                 throws IllegalArgumentException

  Convert the given text value to a Map with a single element.

  指定者:

  setAsText 在接口中 PropertyEditor

  覆盖:

  setAsText 在类中 PropertyEditorSupport

  抛出:

  IllegalArgumentException

• setValue

  public void setValue​(Object value)

  Convert the given value to a Map of the target type.

  指定者:

  setValue 在接口中 PropertyEditor

  覆盖:

  setValue 在类中 PropertyEditorSupport

• createMap

  protected Map<Object,​Object> createMap​(Class<? extends Map> mapType,
                                               int initialCapacity)

  Create a Map of the given type, with the given initial capacity (if supported by the Map type).

  参数:

  mapType - a sub-interface of Map

  initialCapacity - the initial capacity

  返回:

  the new Map instance

• alwaysCreateNewMap

  protected boolean alwaysCreateNewMap()

  Return whether to always create a new Map, even if the type of the passed-in Map already matches.

  Default is "false"; can be overridden to enforce creation of a new Map, for example to convert elements in any case.

  另请参阅:

  convertKey(java.lang.Object), convertValue(java.lang.Object)

• convertKey

  protected Object convertKey​(Object key)

  Hook to convert each encountered Map key. The default implementation simply returns the passed-in key as-is.

  Can be overridden to perform conversion of certain keys, for example from String to Integer.

  Only called if actually creating a new Map! This is by default not the case if the type of the passed-in Map already matches. Override alwaysCreateNewMap() to enforce creating a new Map in every case.

  参数:

  key - the source key

  返回:

  the key to be used in the target Map

  另请参阅:

  alwaysCreateNewMap()

• convertValue

  protected Object convertValue​(Object value)

  Hook to convert each encountered Map value. The default implementation simply returns the passed-in value as-is.

  Can be overridden to perform conversion of certain values, for example from String to Integer.

  Only called if actually creating a new Map! This is by default not the case if the type of the passed-in Map already matches. Override alwaysCreateNewMap() to enforce creating a new Map in every case.

  参数:

  value - the source value

  返回:

  the value to be used in the target Map

  另请参阅:

  alwaysCreateNewMap()

• getAsText

  public String getAsText()

  This implementation returns null to indicate that there is no appropriate text representation.

  指定者:

  getAsText 在接口中 PropertyEditor

  覆盖:

  getAsText 在类中 PropertyEditorSupport