oracle.i18n.servlet
Class ApplicationContext

java.lang.Object
  |
  +--oracle.i18n.servlet.ApplicationContext

public class ApplicationContext

extends Object

The ApplicationContext class provides an application with a globalization configuration environment and controls application scope operations in the GDK framework.

Generally in a J2EE based application, the application code does not need to explicitly create an ApplicationContext object, but rather retrieves an instance by calling the ServletHelper.getApplicationContextInstance(HttpServletRequest) method. In JSP/Servlet based applications, the ApplicationContext is driven by the GDK Application Configuration file gdkapp.xml. The elements of the configuration file, for example: application-locales, page-charset, locale-charset-maps, etc... map to methods in this class. To better understand the various configuration elements, see the The GDK Application Configuration File section of the Globalization Development Guidelines document.

An instance of this object must be created at startup time of the application either by the ContextListener object or in a custom context listener for Java/JSP server applications and be registered in the servlet context with the key ApplicationContext.OBJECT.

Since:

10.1.0.2

Field Summary

static String	DEFAULT_GDKAPP The Constant for the name of the default GDK application configuration file.
static String	OBJECT_KEY Constant for the key name used to retrieve the ApplicationContext object.

Constructor Summary

ApplicationContext(InputStream pathToConfigFile)
Constructs an ApplicationContext object based on the specified application configuration InputStream.

ApplicationContext(InputStream pathToConfigFile, ClassLoader cloader)
Constructs an ApplicationContext object based on the specified application configuration InputStream and the ClassLoader object.

ApplicationContext(String pathToConfigFile)
Constructs an ApplicationContext object that is based on a specified GDK application configuration file.

ApplicationContext(String pathToConfigFile, ClassLoader cloader)
Constructs an ApplicationContext object that is based on a specified GDK application configuration file and the ClassLoader object.

Method Summary

Locale	fallbackLocale(Locale locale) Validates if the locale supplied as an argument is supported.
oracle.i18n.servlet.localesource.LocaleSource	getApplicationDefaultLocaleSource() Returns the application default locale source instance.
String	getIANAPageCharacterSet() Returns the default IANA page character set name of the application or returns the string AUTO-CHARSET.
Class[]	getLocaleSources() Returns an array of locale source Class objects that are used to determine the current locale.
Map	getMessageBundle() Returns a Map consisting of message bundle name and message bundle object pairs.
String	getParameterName(LocaleSource.Parameter parameter) Returns a String representing the parameter name used to specify locale attributes.
String[]	getSupportedIANACharacterSets() Returns an array of supported IANA character set names.
Locale[]	getSupportedLocales() Returns an array of locales supported by the application.
String[]	getSupportedOraLanguages() Returns supported Oracle languages based on the application locale list.
String[]	getSupportedOraLanguages(String oraTerritory) Returns supported Oracle languages for the Oracle territory.
String[]	getSupportedOraTerritories() Returns the supported Oracle territories.
String[]	getSupportedOraTerritories(String oraLanguage) Returns supported Oracle territories for the Oracle language.
int	hashCode() Returns the hash value.

Methods inherited from class java.lang.Object

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

Field Detail

OBJECT_KEY

public static final String OBJECT_KEY

Constant for the key name used to retrieve the ApplicationContext object.

See Also:

Constant Field Values

DEFAULT_GDKAPP

public static final String DEFAULT_GDKAPP

The Constant for the name of the default GDK application configuration file.

See Also:

Constant Field Values

Constructor Detail

ApplicationContext

public ApplicationContext(String pathToConfigFile)
                   throws ClassNotFoundException,
                          PatternSyntaxException,
                          UnsupportedEncodingException

Constructs an ApplicationContext object that is based on a specified GDK application configuration file. The ClassLoader object is derived from this object.

Note: Do not use this method for a JSP/Java Servlet application, instead, use the ServletHelper.getApplicationContextInstance(HttpServletRequest) method.

Parameters:

pathToConfigFile - an absolute file path of the application configuration file

Throws:

ClassNotFoundException - if the LocaleSource class is not found

PatternSyntaxException - if rewriting rule or locale to charset mapping regular expression is invalid

UnsupportedEncodingException - if character set is invalid

ApplicationContext

public ApplicationContext(InputStream pathToConfigFile)
                   throws ClassNotFoundException,
                          PatternSyntaxException,
                          UnsupportedEncodingException

Constructs an ApplicationContext object based on the specified application configuration InputStream.

Parameters:

pathToConfigFile - an input stream object that references the application configuration file

Throws:

ClassNotFoundException - if the LocaleSource class is not found

PatternSyntaxException - if rewriting rule or locale to charset mapping regular expression is invalid

UnsupportedEncodingException - if character set is invalid

ApplicationContext

public ApplicationContext(String pathToConfigFile,
                          ClassLoader cloader)
                   throws ClassNotFoundException,
                          PatternSyntaxException,
                          UnsupportedEncodingException

Constructs an ApplicationContext object that is based on a specified GDK application configuration file and the ClassLoader object. The class loader may be required when a custom LocaleSource object is used in the application configuration file.

Note: Do not use this method for a JSP/Java Servlet application, instead, use the ServletHelper.getApplicationContextInstance(HttpServletRequest) method.

Parameters:

pathToConfigFile - an absolute file path of the application configuration file

cloader - the ClassLoader object that will be used to load LocaleSource classes and message bundles.

Throws:

ClassNotFoundException - if the LocaleSource class is not found

PatternSyntaxException - if rewriting rule or locale to charset mapping regular expression is invalid

UnsupportedEncodingException - if character set is invalid

ApplicationContext

public ApplicationContext(InputStream pathToConfigFile,
                          ClassLoader cloader)
                   throws ClassNotFoundException,
                          PatternSyntaxException,
                          UnsupportedEncodingException

Constructs an ApplicationContext object based on the specified application configuration InputStream and the ClassLoader object. The class loader is required if you will be using a custom LocaleSource object that is specified in the GDK application configuration file.

Parameters:

pathToConfigFile - an input stream object that references the application configuration file

cloader - the ClassLoader object that will be used to load LocaleSource classes and message bundles.

Throws:

ClassNotFoundException - if the LocaleSource class is not found

PatternSyntaxException - if rewriting rule or locale to charset mapping regular expression is invalid

UnsupportedEncodingException - if character set is invalid

Method Detail

getIANAPageCharacterSet

public String getIANAPageCharacterSet()

Returns the default IANA page character set name of the application or returns the string AUTO-CHARSET. If the value AUTO-CHARSET is set, this implies that the GDK framework automatically assigns an appropriate character set value based on the locale.

If the AUTO-CHARSET value is set, you may retrieve the resolved character set name by using the Localizer.getIANACharacterSet() method.

Returns:

an IANA character set name or AUTO-CHARSET

getParameterName

public String getParameterName(LocaleSource.Parameter parameter)

Returns a String representing the parameter name used to specify locale attributes. For example, if you want to get the locale value, use the LocaleSource.Parameter.LOCALE object as input. For example:

 ApplicationContext appctx = ServletHelper.getApplicationContextInstance(
   request);
 String locale = request.getParameter(
   appctx.getParameterName(LocaleSource.Parameter.LOCALE));
 

Parameters:

parameter - a parameter type

Returns:

a parameter name used in the application

getLocaleSources

public Class[] getLocaleSources()

Returns an array of locale source Class objects that are used to determine the current locale.

Returns:

an array of LocaleSource Class objects

getApplicationDefaultLocaleSource

public oracle.i18n.servlet.localesource.LocaleSource getApplicationDefaultLocaleSource()

Returns the application default locale source instance.

Returns:

a LocaleSource representing the application default locale

getMessageBundle

public Map getMessageBundle()

Returns a Map consisting of message bundle name and message bundle object pairs.

Returns:

the map of the message bundle object where the key is the message bundle name and the value is the ResourceBundle object

getSupportedLocales

public Locale[] getSupportedLocales()

Returns an array of locales supported by the application.

The supported locale can be specified in the application configuration file.

Returns:

an array of Locale objects representing supported locales in the application

getSupportedOraLanguages

public String[] getSupportedOraLanguages(String oraTerritory)

Returns supported Oracle languages for the Oracle territory.

The supported languages are determined by the supported locale. If the given territory name is null, all supported Oracle languages are returned.

Parameters:

oraTerritory - Oracle territory name. If this parameter is null, then the method will return all supported Oracle languages that are based on the application locale list.

Returns:

an array of String representing the supported languages in the application

getSupportedOraLanguages

public String[] getSupportedOraLanguages()

Returns supported Oracle languages based on the application locale list.

The supported languages are determined by the supported locale.

Returns:

an array of String objects representing the supported languages in the application

getSupportedOraTerritories

public String[] getSupportedOraTerritories(String oraLanguage)

Returns supported Oracle territories for the Oracle language.

The supported territories are determined by the supported locale list. If the given language is null, all available territories are returned.

Parameters:

oraLanguage - Oracle language name

Returns:

an array of String representing the supported territories in the application

getSupportedOraTerritories

public String[] getSupportedOraTerritories()

Returns the supported Oracle territories.

The supported territories are determined by the supported locale list.

Returns:

an array of String representing the supported territories in the application

getSupportedIANACharacterSets

public String[] getSupportedIANACharacterSets()

Returns an array of supported IANA character set names. This list is based on the supported locale list.

Returns:

an array of supported IANA character sets in the application

fallbackLocale

public Locale fallbackLocale(Locale locale)

Validates if the locale supplied as an argument is supported. If the locale is supported, it is returned by the method. Otherwise, the fallback locale is returned.

If you are not sure that the given locale is supported, call this method the custom locale source object.

Note that supported locales in the application are not equivalent to the translation locales that are handled by the ResourceBundle class or the ServletHelper.rewriteURL(String, HttpServletRequest) method. They validate locales by checking the actual translation resources. If the given locale's translation exists, it is returned, otherwise, it returns the fallback locale's translation.

Parameters:

locale - a Locale object to be examined

Returns:

a Locale that is supported by the application

hashCode

public int hashCode()

Returns the hash value.

Overrides:

hashCode in class Object

Returns:

hash value