PreferenceManager (org.apache.xmlgraphics:batik-util 1.10 API)

java.lang.Object
- org.apache.batik.util.PreferenceManager

public class PreferenceManager
extends Object

This class allows to manage users preferences.

Here is a short usage example:

 // at application intialization
 HashMap defaults = new HashMap();
 defaults.put("windowSize", new Dimension(640, 480));
 defaults.put("antialias", Boolean.TRUE);
 PreferenceManager prefs = new PreferenceManager("application.ini", defaults);
 try {
     prefs.load();
 } catch (IOException e) {
     //
 }
 myApplication.setSize(prefs.getDimension("windowSize"));
 myApplication.setAntialiasingOn(prefs.getBoolean("antialias"));

 // later a dialog box may customize preferences
 myApplication.setAntialiasingOn(antialiasCheckBox.getState());
 prefs.setBoolean("antialias", antialiasCheckBox.getState());

 // when leaving the application we need to save the preferences
 prefs.setDimension("windowSize", myApplication.getSize());
 prefs.setFiles("history", lastVisitedFileArray);
 try {
    prefs.save()
 } catch (IOException e) {
    //
 }

Version:: $Id: PreferenceManager.java 1804130 2017-08-04 14:41:11Z ssteiner $
Author:: Christophe Jolif

Field Summary

Fields
Modifier and Type	Field and Description
`protected Map`	`defaults`
`protected static String`	`FILE_SEP`
`protected String`	`fullName`
`protected Properties`	`internal`
`protected String`	`prefFileName`
`protected static String`	`USER_DIR`
`protected static String`	`USER_HOME`

Constructor Summary

Constructors
Constructor and Description
`PreferenceManager(String prefFileName)` Creates a preference manager.
`PreferenceManager(String prefFileName, Map defaults)` Creates a preference manager with a default values initialization map.

Method Summary

Methods
Modifier and Type	Method and Description
`boolean`	`getBoolean(String key)` Gets a boolean preference.
`Color`	`getColor(String key)` Retruns a Color preference.
`Dimension`	`getDimension(String key)` Returns a Dimension preference.
`File`	`getFile(String key)` Returns a File preference.
`File[]`	`getFiles(String mkey)` Returns an array of Files preference.
`float`	`getFloat(String key)` Gets a float preference.
`Font`	`getFont(String key)` Returns a font preference.
`int`	`getInteger(String key)` Gets an int preference.
`Point`	`getPoint(String key)` Returns a point preference.
`static String`	`getPreferenceDirectory()` Returns a `String` representing the directory where `PreferenceManager` instances should look for preferences.
`Rectangle`	`getRectangle(String key)` Returns a Rectangle preference.
`String`	`getString(String key)` Returns a String preference.
`String[]`	`getStrings(String mkey)` Returns an array of String preference.
`protected static String`	`getSystemProperty(String prop)` Gets a System property if accessible.
`URL`	`getURL(String key)` Returns an URL preference.
`URL[]`	`getURLs(String mkey)` Returns an array of URLs preference.
`void`	`load()` Loads the preference file.
`void`	`save()` Saves the preference file.
`void`	`setBoolean(String key, boolean value)` Sets a boolean property.
`void`	`setColor(String key, Color value)` Sets a Color preference.
`void`	`setDimension(String key, Dimension value)` Sets a Dimension preference.
`void`	`setFile(String key, File value)` Sets a File property.
`void`	`setFiles(String mkey, File[] values)` Sets an array of Files property.
`void`	`setFloat(String key, float value)` Sets a float property.
`void`	`setFont(String key, Font value)` Sets a Font preference.
`void`	`setInteger(String key, int value)` Sets an int property.
`void`	`setPoint(String key, Point value)` Sets a Point preference.
`static void`	`setPreferenceDirectory(String dir)` Sets a `String` representing the directory where `PreferenceManager` instances should look for preferences files.
`void`	`setRectangle(String key, Rectangle value)` Sets a Rectangle preference.
`void`	`setString(String key, String value)` Sets a String preference.
`void`	`setStrings(String mkey, String[] values)` Sets a String array preference.
`void`	`setURL(String key, URL value)` Sets an URL property.
`void`	`setURLs(String mkey, URL[] values)` Sets an array of URLs property.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - internal
```
protected Properties internal
```
  - defaults
```
protected Map defaults
```
  - prefFileName
```
protected String prefFileName
```
  - fullName
```
protected String fullName
```
  - USER_HOME
```
protected static final String USER_HOME
```
  - USER_DIR
```
protected static final String USER_DIR
```
  - FILE_SEP
```
protected static final String FILE_SEP
```
- Constructor Detail
  - PreferenceManager
```
public PreferenceManager(String prefFileName)
```
    Creates a preference manager.
    
    Parameters:
    prefFileName - the name of the preference file.
  - PreferenceManager
```
public PreferenceManager(String prefFileName,
                 Map defaults)
```
    Creates a preference manager with a default values initialization map.
    
    Parameters:
    prefFileName - the name of the preference file.
    defaults - where to get defaults value if the value is not specified in the file.
- Method Detail
  - getSystemProperty
```
protected static String getSystemProperty(String prop)
```
    Gets a System property if accessible. Returns an empty string otherwise
  - setPreferenceDirectory
```
public static void setPreferenceDirectory(String dir)
```
    Sets a String representing the directory where PreferenceManager instances should look for preferences files. The default value is null which means the automatic mechanism for looking for preferences is used.
    
    See Also:
    load()
  - getPreferenceDirectory
```
public static String getPreferenceDirectory()
```
    Returns a String representing the directory where PreferenceManager instances should look for preferences.
    
    See Also:
    load(), setPreferenceDirectory(java.lang.String)
  - load
```
public void load()
          throws IOException
```
    Loads the preference file. If the file has already been previously sucessfuly loaded or saved, it will first try to reaload it from this location. Otherwise, it will try to find the file in the following order: in the directory set by setPreferenceDirectory(java.lang.String) if it exists, in the user home directory and then in the current user directory.
    
    Throws:
    
    IOException - if an error occured when reading the file.
    See Also:
    save()
  - save
```
public void save()
          throws IOException
```
    Saves the preference file. If it has previously sucessfuly been loaded or save it will save it at the same location. In other cases it will save it in the directory set by setPreferenceDirectory(java.lang.String) if has been set and exists, otherwise in the user home directory.
    
    Throws:
    
    IOException - if an error occured when writing the file or if is impossible to write the file at all available locations.
    See Also:
    load()
  - getRectangle
```
public Rectangle getRectangle(String key)
```
    Returns a Rectangle preference.
  - getDimension
```
public Dimension getDimension(String key)
```
    Returns a Dimension preference.
  - getPoint
```
public Point getPoint(String key)
```
    Returns a point preference.
  - getColor
```
public Color getColor(String key)
```
    Retruns a Color preference.
  - getFont
```
public Font getFont(String key)
```
    Returns a font preference.
  - getString
```
public String getString(String key)
```
    Returns a String preference.
  - getStrings
```
public String[] getStrings(String mkey)
```
    Returns an array of String preference.
  - getURL
```
public URL getURL(String key)
```
    Returns an URL preference.
  - getURLs
```
public URL[] getURLs(String mkey)
```
    Returns an array of URLs preference.
  - getFile
```
public File getFile(String key)
```
    Returns a File preference.
  - getFiles
```
public File[] getFiles(String mkey)
```
    Returns an array of Files preference.
  - getInteger
```
public int getInteger(String key)
```
    Gets an int preference.
  - getFloat
```
public float getFloat(String key)
```
    Gets a float preference.
  - getBoolean
```
public boolean getBoolean(String key)
```
    Gets a boolean preference. If not found and no default returns false.
  - setRectangle
```
public void setRectangle(String key,
                Rectangle value)
```
    Sets a Rectangle preference. If null removes it.
  - setDimension
```
public void setDimension(String key,
                Dimension value)
```
    Sets a Dimension preference. If null removes it.
  - setPoint
```
public void setPoint(String key,
            Point value)
```
    Sets a Point preference. If null removes it.
  - setColor
```
public void setColor(String key,
            Color value)
```
    Sets a Color preference. If null removes it.
  - setFont
```
public void setFont(String key,
           Font value)
```
    Sets a Font preference. If null removes it.
  - setString
```
public void setString(String key,
             String value)
```
    Sets a String preference. If null removes it.
  - setStrings
```
public void setStrings(String mkey,
              String[] values)
```
    Sets a String array preference. If null or size null removes previous preference.
  - setURL
```
public void setURL(String key,
          URL value)
```
    Sets an URL property. If null removes it.
  - setURLs
```
public void setURLs(String mkey,
           URL[] values)
```
    Sets an array of URLs property. If null or size null removes previous preference.
  - setFile
```
public void setFile(String key,
           File value)
```
    Sets a File property. If null removes it.
  - setFiles
```
public void setFiles(String mkey,
            File[] values)
```
    Sets an array of Files property. If null or size null removes previous preference.
  - setInteger
```
public void setInteger(String key,
              int value)
```
    Sets an int property.
  - setFloat
```
public void setFloat(String key,
            float value)
```
    Sets a float property.
  - setBoolean
```
public void setBoolean(String key,
              boolean value)
```
    Sets a boolean property.

Class PreferenceManager

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

internal

defaults

prefFileName

fullName

USER_HOME

USER_DIR

FILE_SEP

Constructor Detail

PreferenceManager

PreferenceManager

Method Detail

getSystemProperty

setPreferenceDirectory

getPreferenceDirectory

load

save

getRectangle

getDimension

getPoint

getColor

getFont

getString

getStrings

getURL

getURLs

getFile

getFiles

getInteger

getFloat

getBoolean

setRectangle

setDimension

setPoint

setColor

setFont

setString

setStrings

setURL

setURLs

setFile

setFiles

setInteger

setFloat

setBoolean