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February 01, 2011

Mark Wielaard: New GPG key. Finally created a new GPG key using gnupg. The old one was a DSA/1024 bits one and 8 years old. The new one is a RSA/2048 bits one. I will use the new one in the future to sign any release tarballs I might create. pub 2048R/57816A6A 2011-01-29 Key f...

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February 01, 2011

Andrew Hughes: [SECURITY] IcedTea6 1.7.8, 1.8.5, 1.9.5 Released!. We are pleased to announce a new set of security releases, IcedTea6 1.7.8, IcedTea6 1.8.5 and IcedTea6 1.9.5. This update contains the following security updates: The IcedTea project provides a harness to build the source code from OpenJDK6 u...

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home > news > java technology > the hierarchy api

The Hierarchy API

Tree-like structures are a very common pattern. Just to count instances of this pattern in my FLOSS projects: The File Explorer in blueMarine, where photos are shown as they are stored in directories on the local disk. The Calendar Explorer in blueMarine, where nodes representing year / month / day are shown for each day in which a photo has been taken. The Metadata Explorer in blueMarine, where various metadata directories are shown (ok, this is a very shallow tree with only two levels). The Catalog Explorer in blueMarine, where photo tags and tag categories are shown in hierarchical fashion. The Gallery Explorer in blueMarine, where it's possible to create galleries of photos, that can contain folders inside (currently only one level of folders, but it's a limitation that I don't like). The Trip Explorer in blueMarine, where it's possible to see photos arranged by trip (and eventually associated GPS track).  The GeoExplorer in forceTen, where it's possible to navigate a tree of geographical entities. The forthcoming Place Eplorer of forceTen (and blueMarine too) where it will be possible to arrange a set of favourite locations, and arrange them in folders and subfolders (such as in Google Earth). Currently each of the mentioned features is implemented in a different way. Enough for trying a common solution? As all the real-life patterns, there are many variations on ...


Date: January, 12 2010
Url: http://www.java.net/blog/fabriziogiudici/archive/2010/01/11/hierarchy-api


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