org.apache.wicket.extensions.util.encoding

Class CharSetMap

java.lang.Object

org.apache.wicket.extensions.util.encoding.CharSetMap

public final class CharSetMap
extends Object

This class maintains a set of mappers defining mappings between locales and the corresponding charsets. The mappings are defined as properties between locale and charset names. The definitions can be listed in property files located in user's home directory, Java home directory or the current class jar. In addition, this class maintains static default mappings and constructors support application specific mappings. This source has originally been taken from the jakarta Turbine project.

Author:

Ilkka Priha

Field Summary

Fields

Modifier and Type	Field and Description
static String	CHARSET_RESOURCE The name for charset mapper resources.
static String	DEFAULT_CHARSET The default charset when nothing else is applicable.

Constructor Summary

Constructors

Constructor and Description
CharSetMap() Constructs a new charset map with default mappers.
CharSetMap(File file) Constructs a charset map read from a property file.
CharSetMap(InputStream input) Constructs a charset map read from a stream.
CharSetMap(Properties props) Constructs a charset map from properties.
CharSetMap(String path) Constructs a charset map read from a property file path.

Method Summary

Modifier and Type	Method and Description
String	getCharSet(Locale locale) Gets the charset for a locale.
String	getCharSet(Locale locale, String variant) Gets the charset for a locale with a variant.
String	getCharSet(String key) Gets the charset for a specified key.
String	getCharSet(String key, String def) Gets the charset for a specified key.
protected static Map<String,String>	loadFile(File file) Loads mappings from a file.
protected static Map<String,String>	loadPath(String path) Loads mappings from a file path.
protected static Map<String,String>	loadResource(String name) Loads mappings from a resource.
protected static Map<String,String>	loadStream(InputStream input) Loads mappings from a stream.
void	setCharSet(String key, String charset) Sets a locale-charset mapping.
protected void	setCommonCharSet(String key, String charset) Sets a common locale-charset mapping.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_CHARSET

public static final String DEFAULT_CHARSET

The default charset when nothing else is applicable.

See Also:

Constant Field Values

CHARSET_RESOURCE

public static final String CHARSET_RESOURCE

The name for charset mapper resources.

See Also:

Constant Field Values

Constructor Detail

CharSetMap

public CharSetMap()

Constructs a new charset map with default mappers.

CharSetMap

public CharSetMap(Properties props)

Constructs a charset map from properties.

Parameters:

props - charset mapping properties.

CharSetMap

public CharSetMap(InputStream input)
           throws IOException

Constructs a charset map read from a stream.

Parameters:

input - an input stream.

Throws:

IOException - for an incorrect stream.

CharSetMap

public CharSetMap(File file)
           throws IOException

Constructs a charset map read from a property file.

Parameters:

file - a property file.

Throws:

IOException - for an incorrect property file.

CharSetMap

public CharSetMap(String path)
           throws IOException

Constructs a charset map read from a property file path.

Parameters:

path - a property file path.

Throws:

IOException - for an incorrect property file.

Method Detail

loadStream

protected static Map<String,String> loadStream(InputStream input)
                                        throws IOException

Loads mappings from a stream.

Parameters:

input - an input stream.

Returns:

the mappings.

Throws:

IOException - for an incorrect stream.

loadFile

protected static Map<String,String> loadFile(File file)
                                      throws IOException

Loads mappings from a file.

Parameters:

file - a file.

Returns:

the mappings.

Throws:

IOException - for an incorrect file.

loadPath

protected static Map<String,String> loadPath(String path)
                                      throws IOException

Loads mappings from a file path.

Parameters:

path - a file path.

Returns:

the mappings.

Throws:

IOException - for an incorrect file.

loadResource

protected static Map<String,String> loadResource(String name)

Loads mappings from a resource.

Parameters:

name - a resource name.

Returns:

the mappings.

setCharSet

public final void setCharSet(String key,
                             String charset)

Sets a locale-charset mapping.

Parameters:

key - the key for the charset.

charset - the corresponding charset.

getCharSet

public final String getCharSet(Locale locale)

Gets the charset for a locale. First a locale specific charset is searched for, then a country specific one and lastly a language specific one. If none is found, the default charset is returned.

Parameters:

locale - the locale.

Returns:

the charset.

getCharSet

public final String getCharSet(Locale locale,
                               String variant)

Gets the charset for a locale with a variant. The search is performed in the following order: "lang"_"country"_"variant"="charset", _"country"_"variant"="charset", "lang"__"variant"="charset", __"variant"="charset", "lang"_"country"="charset", _"country"="charset", "lang"="charset". If nothing of the above is found, the default charset is returned.

Parameters:

locale - the locale.

variant - a variant field.

Returns:

the charset.

getCharSet

public final String getCharSet(String key)

Gets the charset for a specified key.

Parameters:

key - the key for the charset.

Returns:

the found charset or the default one.

getCharSet

public final String getCharSet(String key,
                               String def)

Gets the charset for a specified key.

Parameters:

key - the key for the charset.

def - the default charset if none is found.

Returns:

the found charset or the given default.

setCommonCharSet

protected final void setCommonCharSet(String key,
                                      String charset)

Sets a common locale-charset mapping.

Parameters:

key - the key for the charset.

charset - the corresponding charset.