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| With JDK 1.4 Java has expanded on its Properties class and now provides a Preferences API. This is the product of JSR-10 (Java Specification Request) ''Preferences API Specication: A simple API allowing programs to manipulate user preference data and configuration data'', and is a substantial improvement on the Preferences functionality. |
| With JDK 1.4 Java has expanded on its Properties class and now provides a Preferences API. This is the product of JSR-10 (Java Specification Request) ''Preferences API Specification: A simple API allowing programs to manipulate user preference data and configuration data'', and is a substantial improvement on the Preferences functionality. |
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| Part of the reason I'm looking into this is that given it provides a hierarchical preferences model, it might suit the needs of WikiFarms. |
| Part of the reason I'm looking into this is that given it provides a hierarchical preferences model, it might suit the needs of WikiFarms (see MultipleWikis, MultiWikiDevelopment, IdeasMultipleWikiWebs), since it would be possible to share both system configuration and user-level information across multiple wiki. -- MurrayAltheim |
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| !! "Implementation" |
| !! Notes on "Implementation" |
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| The Preferences API permits XML import and export of preference data. The DTD is posted as part of the javadocs |
| for the java.util.prefs.Preferences class. There are methods for both importing and exporting the XML using |
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| ; {{importPreferences(~InputStream is)}} : Imports all of the preferences represented by the XML document on the specified input stream. |
| ; {{exportNode(~OutputStream os)}} : Emits on the specified output stream an XML document representing all of the preferences contained in this node (but not its descendants). |
| ; {{exportSubtree(~OutputStream os)}} : Emits an XML document representing all of the preferences contained in this node and all of its descendants. |
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| but normally developers wouldn't even have to deal with these unless one wanted to control where the J2SE implementation was storing the prefs, e.g., to permit the XML to be hand-edited. |
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| %%blockquote |
| This class contains an export/import facility, allowing preferences to be "exported" to an XML document, and XML documents representing preferences to be "imported" back into the system. This facility may be used to back up all or part of a preference tree, and subsequently restore from the backup. |
| %% |
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| * [Preferences API documentation in J2SE 1.4.2 | http://java.sun.com/j2se/1.4.2/docs/guide/lang/preferences.html] |
| * [Preferences API documentation in J2SE 1.5 | http://java.sun.com/j2se/1.5.0/docs/guide/preferences/index.html] |
| * [Preferences API Guide in J2SE 1.4.2 | http://java.sun.com/j2se/1.4.2/docs/guide/lang/preferences.html] |
| * [Preferences API Guide in J2SE 1.5 | http://java.sun.com/j2se/1.5.0/docs/guide/preferences/index.html] |
| * [Preferences API Javadoc | http://java.sun.com/j2se/1.4.2/docs/api/java/util/prefs/package-summary.html] |
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| ! Discussion |
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