Package org.zkoss.util.resource

Class Labels

  • public class Labels
extends java.lang.Object
    Utilities to access labels. A label is a Locale-dependent string that is stored in a Locale-dependent file (*.properties).

    Specify the library property of org.zkoss.util.resource.LabelLoader.class in zk.xml to provide a customized label loader for debugging purpose. (since 7.0.1)

    Author:
    tomyeh

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static java.lang.String getLabel​(java.lang.String key)
      Returns the label of the specified key based on the current Locale, or null if no found.
      static java.lang.String getLabel​(java.lang.String key, java.lang.Object[] args)
      Returns the label of the specified key and formats it with the specified argument, or null if not found.
      static java.lang.String getLabel​(java.lang.String key, java.lang.String defValue)
      Returns the label of the specified key based on the current Locale, or the default value if no found.
      static java.lang.String getLabel​(java.lang.String key, java.lang.String defValue, java.lang.Object[] args)
      Returns the label of the specified key and formats it with the specified argument, or the default value if not found.
      static java.lang.String getRequiredLabel​(java.lang.String key)
      Returns the label of the specified key based on the current locale.
      static java.lang.String getRequiredLabel​(java.lang.String key, java.lang.Object[] args)
      Returns the label of the specified key and formats it with the specified argument, or null if not found.
      static java.util.Map<java.lang.String,​java.lang.Object> getSegmentedLabels()
      Returns the label or a map of labels associated with the key.
      static void register​(LabelLocator locator)
      Registers a locator which is used to load the Locale-dependent labels from other resource, such as servlet contexts.
      static void register​(LabelLocator2 locator)
      Registers a locator which is used to load the Locale-dependent labels from other resource, such as database.
      static void reset()
      Resets all cached labels and next call to getLabel(String) will cause re-loading the Locale dependent files.
      static VariableResolver setVariableResolver​(VariableResolver resolv)
      Sets the variable resolver, which is used if an EL expression is specified.

      • Methods inherited from class java.lang.Object

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

    • Method Detail

      • getLabel

        public static final java.lang.String getLabel​(java.lang.String key)
        Returns the label of the specified key based on the current Locale, or null if no found.

        The current locale is given by Locales.getCurrent().

        See Also:
        getSegmentedLabels()

      • getLabel

        public static final java.lang.String getLabel​(java.lang.String key,
                                              java.lang.String defValue)
        Returns the label of the specified key based on the current Locale, or the default value if no found.

        The current locale is given by Locales.getCurrent().

        Parameters:
        defValue - the value being returned if the key is not found
        Since:
        3.6.0

      • getSegmentedLabels

        public static final java.util.Map<java.lang.String,​java.lang.Object> getSegmentedLabels()
        Returns the label or a map of labels associated with the key. Unlike getLabel(java.lang.String), if a key of the label contains dot, it will be split into multiple keys and then grouped into map. For example, the following property file will parsed into a couple of maps, and getSegmentedLabels() returns a map containing a single entry. The entry's key is "a" and the value is another map with two entries "b" and "c". And, the value for "b" is another two-entries map (containing "c" and "d"). 
        
 a.b.c=1
 a.b.d=2
 a.e=3

        This method is designed to make labels easier to be accessed in EL expressions.

        On the other hand, getLabel(java.lang.String) does not split them, and you could access them by, say, getLabel("a.b.d").

        Since:
        5.0.7

      • getRequiredLabel

        public static final java.lang.String getRequiredLabel​(java.lang.String key)
                                               throws SystemException
        Returns the label of the specified key based on the current locale. Unlike getLabel(String), it throws an exception if not found.
        Throws:
        SystemException - if no such label
        Since:
        3.0.6

      • getRequiredLabel

        public static final java.lang.String getRequiredLabel​(java.lang.String key,
                                                      java.lang.Object[] args)
        Returns the label of the specified key and formats it with the specified argument, or null if not found. Unlike getLabel(String, Object[]), it throws an exception if not found.

        The current locale is given by Locales.getCurrent().

        Throws:
        SystemException - if no such label
        Since:
        3.0.6

      • reset

        public static final void reset()
        Resets all cached labels and next call to getLabel(String) will cause re-loading the Locale dependent files.

      • setVariableResolver

        public static final VariableResolver setVariableResolver​(VariableResolver resolv)
        Sets the variable resolver, which is used if an EL expression is specified.

        Default: no resolver at all.

        Returns:
        the previous resolver, or null if no resolver.

      • register

        public static final void register​(LabelLocator locator)
        Registers a locator which is used to load the Locale-dependent labels from other resource, such as servlet contexts.

      • register

        public static final void register​(LabelLocator2 locator)
        Registers a locator which is used to load the Locale-dependent labels from other resource, such as database.
        Since:
        5.0.5