ch.qos.logback.core.util
Class OptionHelper

java.lang.Object
  ch.qos.logback.core.util.OptionHelper

public class OptionHelper
extends java.lang.Object

Author:

Ceki Gulcu

Constructor Summary

OptionHelper()

Method Summary

static java.lang.String[]	extractDefaultReplacement(java.lang.String key)
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, java.lang.ClassLoader classLoader)
static java.lang.Object	instantiateByClassName(java.lang.String className, java.lang.Class superClass, Context context)
static boolean	isEmpty(java.lang.String str)
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 val, PropertyContainer pc1, PropertyContainer pc2) 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

instantiateByClassName

public static java.lang.Object instantiateByClassName(java.lang.String className,
                                                      java.lang.Class superClass,
                                                      Context context)
                                               throws IncompatibleClassException,
                                                      DynamicClassLoadingException

Throws:

IncompatibleClassException

DynamicClassLoadingException

instantiateByClassName

public static java.lang.Object instantiateByClassName(java.lang.String className,
                                                      java.lang.Class superClass,
                                                      java.lang.ClassLoader classLoader)
                                               throws IncompatibleClassException,
                                                      DynamicClassLoadingException

Throws:

IncompatibleClassException

DynamicClassLoadingException

substVars

public static java.lang.String substVars(java.lang.String val,
                                         PropertyContainer pc1)

See Also:

substVars(String, PropertyContainer, PropertyContainer)

substVars

public static java.lang.String substVars(java.lang.String val,
                                         PropertyContainer pc1,
                                         PropertyContainer pc2)

See http://logback.qos.ch/manual/configuration.html#variableSubstitution

propertyLookup

public static java.lang.String propertyLookup(java.lang.String key,
                                              PropertyContainer pc1,
                                              PropertyContainer pc2)

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)

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)