org.openide.util

Class MapFormat

java.lang.Object

java.text.Format

org.openide.util.MapFormat

All Implemented Interfaces:

Serializable, Cloneable

public class MapFormat
extends Format

A text format similar to MessageFormat but using string rather than numeric keys. You might use use this formatter like this:

MapFormat.format("Hello {name}", map);

Or to have more control over it:

 Map m = new HashMap ();
 m.put ("KEY", "value");
 MapFormat f = new MapFormat (m);
 f.setLeftBrace ("__");
 f.setRightBrace ("__");
 String result = f.format ("the __KEY__ here");
 

See Also:

MessageFormat, Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.text.Format

Format.Field

Constructor Summary

Constructors

Constructor and Description
MapFormat(Map arguments) Constructor.

Method Summary

Modifier and Type	Method and Description
StringBuffer	format(Object pat, StringBuffer result, FieldPosition fpos) Formats the parsed string by inserting table's values.
static String	format(String pattern, Map arguments) Designated method.
String	getLeftBrace() Returns string used as left brace
Map	getMap() Returns argument map
String	getRightBrace() Returns string used as right brace
boolean	isExactMatch() Test whether both brackets are required in the expression.
String	parse(String source) Parses the string.
Object	parseObject(String text, ParsePosition status) Parses the string.
protected Object	processKey(String key) Returns the value for given key.
String	processPattern(String newPattern) Scans the pattern and prepares internal variables.
void	setExactMatch(boolean flag) Specify whether both brackets are required in the expression.
void	setLeftBrace(String delimiter) Sets string used as left brace
void	setMap(Map map) Sets argument map This map should contain key-value pairs with key values used in formatted string expression.
void	setRightBrace(String delimiter) Sets string used as right brace
void	setThrowExceptionIfKeyWasNotFound(boolean flag) Specify whether formatter will throw exception if object for key was not found.
boolean	willThrowExceptionIfKeyWasNotFound() Test whether formatter will throw exception if object for key was not found.

Methods inherited from class java.text.Format

clone, format, formatToCharacterIterator, parseObject

Methods inherited from class java.lang.Object

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

Constructor Detail

MapFormat

public MapFormat(Map arguments)

Constructor. For common work use format(pattern, arguments) .

Parameters:

arguments - keys and values to use in the format

Method Detail

format

public static String format(String pattern,
                            Map arguments)

Designated method. It gets the string, initializes HashFormat object and returns converted string. It scans pattern for {} brackets, then parses enclosed string and replaces it with argument's get() value.

Parameters:

pattern - String to be parsed.

arguments - Map with key-value pairs to replace.

Returns:

Formatted string

processKey

protected Object processKey(String key)

Returns the value for given key. Subclass may define its own beahvior of this method. For example, if key is not defined, subclass can return string.

Parameters:

key - Key.

Returns:

Value for this key.

processPattern

public String processPattern(String newPattern)
                      throws IllegalArgumentException

Scans the pattern and prepares internal variables.

Parameters:

newPattern - String to be parsed.

Throws:

IllegalArgumentException - if number of arguments exceeds BUFSIZE or parser found unmatched brackets (this exception should be switched off using setExactMatch(false)).

format

public StringBuffer format(Object pat,
                           StringBuffer result,
                           FieldPosition fpos)

Formats the parsed string by inserting table's values.

Specified by:

format in class Format

Parameters:

pat - a string pattern

result - Buffer to be used for result.

fpos - position

Returns:

Formatted string

parseObject

public Object parseObject(String text,
                          ParsePosition status)

Parses the string. Does not yet handle recursion (where the substituted strings contain %n references.)

Specified by:

parseObject in class Format

parse

public String parse(String source)

Parses the string. Does not yet handle recursion (where the substituted strings contain {n} references.)

Returns:

New format.

willThrowExceptionIfKeyWasNotFound

public boolean willThrowExceptionIfKeyWasNotFound()

Test whether formatter will throw exception if object for key was not found. If given map does not contain object for key specified, it could throw an exception. Returns true if throws. If not, key is left unchanged.

setThrowExceptionIfKeyWasNotFound

public void setThrowExceptionIfKeyWasNotFound(boolean flag)

Specify whether formatter will throw exception if object for key was not found. If given map does not contain object for key specified, it could throw an exception. If does not throw, key is left unchanged.

Parameters:

flag - If true, formatter throws IllegalArgumentException.

isExactMatch

public boolean isExactMatch()

Test whether both brackets are required in the expression. If not, use setExactMatch(false) and formatter will ignore missing right bracket. Advanced feature.

setExactMatch

public void setExactMatch(boolean flag)

Specify whether both brackets are required in the expression. If not, use setExactMatch(false) and formatter will ignore missing right bracket. Advanced feature.

Parameters:

flag - If true, formatter will ignore missing right bracket (default = false)

getLeftBrace

public String getLeftBrace()

Returns string used as left brace

setLeftBrace

public void setLeftBrace(String delimiter)

Sets string used as left brace

Parameters:

delimiter - Left brace.

getRightBrace

public String getRightBrace()

Returns string used as right brace

setRightBrace

public void setRightBrace(String delimiter)

Sets string used as right brace

Parameters:

delimiter - Right brace.

getMap

public Map getMap()

Returns argument map

setMap

public void setMap(Map map)

Sets argument map This map should contain key-value pairs with key values used in formatted string expression. If value for key was not found, formatter leave key unchanged (except if you've set setThrowExceptionIfKeyWasNotFound(true), then it fires IllegalArgumentException.

Parameters:

map - the argument map