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JoSQL 1.8

  Date Added: July 27, 2010  |  Visits: 666

JoSQL

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JoSQL (SQL for Java Objects) provides the ability for a developer to apply a SQL statement to a collection of Java Objects. JoSQL provides the ability to search, order and group ANY Java objects and should be applied when you want to perform SQL-like queries on a collection of Java Objects. Example: // Get a list of java.io.File objects. List myObjs = getMyObjects (); // Create a new Query. Query q = new Query (); // Parse the SQL you are going to use, it is assumed here that // "myObjs" contains instances of "java.io.File". q.parse ("SELECT name,length " + "FROM java.io.File " + "WHERE fileExtension (name) = :fileExt " + "ORDER BY length DESC, name " + "EXECUTE ON RESULTS avg (:_allobjs, length) avgLength"); // Set the bind variable "fileExt". q.setVariable ("fileExt", "java"); // Execute the query. QueryResults qr = q.execute (myObjs); // Get the average length, this is a save value, the result // of executing the call "avg (:_allobjs, length)", it is saved against // key: "avgLength". Map saveValues = qr.getSaveValues (); Number avg = (Number) saveValues.get ("avgLength"); // Cycle over the results. List res = qr.getResults (); for (int i = 0; i < res.size (); i++) { // This time there is a List for each row, index 0 holds the name of // the file that matched, index 1 holds the length. List r = (List) res.get (i); System.out.println ("NAME: " + r.get (0)); System.out.println ("LENGTH: " + r.get (1) + ", AVG: " + avg); } Whats New in This Release: - This release focuses on bug fixes..

Requirements: No special requirements
Platforms: Linux
Keyword: Ability Collection For Java Java Java Objects Josql Length Libraries List Objects Programming Sql Statement
Users rating: 0/10

License: Freeware Size: 245.76 KB
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