Package ch.qos.logback.core.util

Class OptionHelper

  • public class OptionHelper
extends java.lang.Object

    • Constructor Summary

      Constructors 
      Constructor Description
      OptionHelper()  

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static java.lang.String[] extractDefaultReplacement​(java.lang.String key)
      Return a String[] of size two.
      static java.lang.String getEnv​(java.lang.String key)
      Lookup a key from the environment.
      static java.util.Properties getSystemProperties()
      Very similar to System.getProperties() except that the SecurityException is absorbed.
      static java.lang.String getSystemProperty​(java.lang.String key)
      Very similar to System.getProperty except that the SecurityException is absorbed.
      static java.lang.String getSystemProperty​(java.lang.String key, java.lang.String def)
      Very similar to System.getProperty except that the SecurityException is absorbed.
      static java.lang.Object instantiateByClassName​(java.lang.String className, java.lang.Class<?> superClass, Context context)  
      static java.lang.Object instantiateByClassName​(java.lang.String className, java.lang.Class<?> superClass, java.lang.ClassLoader classLoader)  
      static java.lang.Object instantiateByClassNameAndParameter​(java.lang.String className, java.lang.Class<?> superClass, Context context, java.lang.Class<?> type, java.lang.Object param)  
      static java.lang.Object instantiateByClassNameAndParameter​(java.lang.String className, java.lang.Class<?> superClass, java.lang.ClassLoader classLoader, java.lang.Class<?> type, java.lang.Object parameter)  
      static java.lang.Object instantiateClassWithSuperclassRestriction​(java.lang.Class<?> classObj, java.lang.Class<?> superClass)  
      static boolean isEmpty​(java.lang.String str)  
      static boolean isNotEmtpy​(java.lang.Object[] array)  
      static boolean isNullOrEmpty​(java.lang.Object[] array)  
      static java.lang.String propertyLookup​(java.lang.String key, PropertyContainer pc1, PropertyContainer pc2)  
      static void setSystemProperties​(ContextAware contextAware, java.util.Properties props)  
      static void setSystemProperty​(ContextAware contextAware, java.lang.String key, java.lang.String value)  
      static java.lang.String substVars​(java.lang.String val, PropertyContainer pc1)  
      static java.lang.String substVars​(java.lang.String input, PropertyContainer pc0, PropertyContainer pc1)
      See http://logback.qos.ch/manual/configuration.html#variableSubstitution
      static boolean toBoolean​(java.lang.String value, boolean dEfault)
      If value is "true", then true is returned.

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • OptionHelper

        public OptionHelper()

    • Method Detail

      • substVars

        public static java.lang.String substVars​(java.lang.String input,
                                         PropertyContainer pc0,
                                         PropertyContainer pc1)
        See http://logback.qos.ch/manual/configuration.html#variableSubstitution

      • getSystemProperty

        public static java.lang.String getSystemProperty​(java.lang.String key,
                                                 java.lang.String def)
        Very similar to System.getProperty except that the SecurityException is absorbed.
        Parameters:
        key - The key to search for.
        def - The default value to return.
        Returns:
        the string value of the system property, or the default value if there is no property with that key.

      • getEnv

        public static java.lang.String getEnv​(java.lang.String key)
        Lookup a key from the environment.
        Parameters:
        key -
        Returns:
        value corresponding to key from the OS environment

      • getSystemProperty

        public static java.lang.String getSystemProperty​(java.lang.String key)
        Very similar to System.getProperty except that the SecurityException is absorbed.
        Parameters:
        key - The key to search for.
        Returns:
        the string value of the system property.

      • setSystemProperties

        public static void setSystemProperties​(ContextAware contextAware,
                                       java.util.Properties props)

      • setSystemProperty

        public static void setSystemProperty​(ContextAware contextAware,
                                     java.lang.String key,
                                     java.lang.String value)

      • getSystemProperties

        public static java.util.Properties getSystemProperties()
        Very similar to System.getProperties() except that the SecurityException is absorbed.
        Returns:
        the system properties

      • extractDefaultReplacement

        public static java.lang.String[] extractDefaultReplacement​(java.lang.String key)
        Return a String[] of size two. The first item containing the key part and the second item containing a default value specified by the user. The second item will be null if no default value is specified.
        Parameters:
        key -
        Returns:

      • toBoolean

        public static boolean toBoolean​(java.lang.String value,
                                boolean dEfault)
        If value is "true", then true is returned. If value is "false", then true is returned. Otherwise, default is returned.

        Case of value is unimportant.

      • isEmpty

        public static boolean isEmpty​(java.lang.String str)

      • isNullOrEmpty

        public static final boolean isNullOrEmpty​(java.lang.Object[] array)

      • isNotEmtpy

        public static final boolean isNotEmtpy​(java.lang.Object[] array)