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## org.springframework.ui.context.support
Class ResourceBundleThemeSource

    java.lang.Object
      org.springframework.ui.context.support.ResourceBundleThemeSource

All Implemented Interfaces:
  HierarchicalThemeSource, ThemeSource

    public class ResourceBundleThemeSource

extends Object
implements HierarchicalThemeSource

`ThemeSource` implementation that looks up an individual `ResourceBundle` per theme. The theme name gets interpreted as ResourceBundle basename, supporting a common basename prefix for all themes.

Author:
  Jean-Pierre Pawlak, Juergen Hoeller
See Also:
  `setBasenamePrefix(java.lang.String)`, `ResourceBundle`, `ResourceBundleMessageSource`

Field Summary
`protected Log` | `logger`

Constructor Summary
`ResourceBundleThemeSource()`

Method Summary
`protected MessageSource` | `createMessageSource(String basename)` Create a MessageSource for the given basename, to be used as MessageSource for the corresponding theme.
`ThemeSource` | `getParentThemeSource()` Return the parent of this ThemeSource, or `null` if none.
`Theme` | `getTheme(String themeName)` This implementation returns a SimpleTheme instance, holding a ResourceBundle-based MessageSource whose basename corresponds to the given theme name (prefixed by the configured "basenamePrefix").
`protected void` | `initParent(Theme theme)` Initialize the MessageSource of the given theme with the one from the corresponding parent of this ThemeSource.
`void` | `setBasenamePrefix(String basenamePrefix)` Set the prefix that gets applied to the ResourceBundle basenames, i.e. the theme names.
`void` | `setParentThemeSource(ThemeSource parent)` Set the parent that will be used to try to resolve theme messages that this object can't resolve.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### logger

    protected final Log logger

Constructor Detail

### ResourceBundleThemeSource

    public ResourceBundleThemeSource()

Method Detail

### setParentThemeSource

    public void setParentThemeSource(ThemeSource parent)

  Description copied from interface: `HierarchicalThemeSource`
  Set the parent that will be used to try to resolve theme messages that this object can't resolve.

  Specified by:
    `setParentThemeSource` in interface `HierarchicalThemeSource`
  Parameters:
    `parent` - the parent ThemeSource that will be used to resolve messages that this object can't resolve. May be `null`, in which case no further resolution is possible.

### getParentThemeSource

    public ThemeSource getParentThemeSource()

  Description copied from interface: `HierarchicalThemeSource`
  Return the parent of this ThemeSource, or `null` if none.

  Specified by:
    `getParentThemeSource` in interface `HierarchicalThemeSource`

### setBasenamePrefix

    public void setBasenamePrefix(String basenamePrefix)

  Set the prefix that gets applied to the ResourceBundle basenames, i.e. the theme names. E.g.: basenamePrefix="test.", themeName="theme" -> basename="test.theme".

  Note that ResourceBundle names are effectively classpath locations: As a consequence, the JDK's standard ResourceBundle treats dots as package separators. This means that "test.theme" is effectively equivalent to "test/theme", just like it is for programmatic `java.util.ResourceBundle` usage.

  See Also:
    `ResourceBundle.getBundle(String)`

### getTheme

    public Theme getTheme(String themeName)

  This implementation returns a SimpleTheme instance, holding a ResourceBundle-based MessageSource whose basename corresponds to the given theme name (prefixed by the configured "basenamePrefix").

  SimpleTheme instances are cached per theme name. Use a reloadable MessageSource if themes should reflect changes to the underlying files.

  Specified by:
    `getTheme` in interface `ThemeSource`
  Parameters:
    `themeName` - the name of the theme
  Returns:
    the corresponding Theme, or `null` if none defined. Note that, by convention, a ThemeSource should at least be able to return a default Theme for the default theme name "theme" but may also return default Themes for other theme names.
  See Also:
    `setBasenamePrefix(java.lang.String)`, `createMessageSource(java.lang.String)`

### createMessageSource

    protected MessageSource createMessageSource(String basename)

  Create a MessageSource for the given basename, to be used as MessageSource for the corresponding theme.

  Default implementation creates a ResourceBundleMessageSource. for the given basename. A subclass could create a specifically configured ReloadableResourceBundleMessageSource, for example.

  Parameters:
    `basename` - the basename to create a MessageSource for
  Returns:
    the MessageSource
  See Also:
    `ResourceBundleMessageSource`, `ReloadableResourceBundleMessageSource`

### initParent

    protected void initParent(Theme theme)

  Initialize the MessageSource of the given theme with the one from the corresponding parent of this ThemeSource.

  Parameters:
    `theme` - the Theme to (re-)initialize

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