bundles/org.simantics.acorn/src/org/simantics/acorn/AcornDatabaseManager.java

   1 package org.simantics.acorn;
   2
   3 import java.io.IOException;
   4 import java.nio.file.Files;
   5 import java.nio.file.Path;
   6 import java.util.HashMap;
   7 import java.util.Map;
   8
   9 import org.simantics.acorn.internal.AcornDatabase;
  10 import org.simantics.db.Database;
  11 import org.simantics.db.server.ProCoreException;
  12
  13 /**
  14  * @author Tuukka Lehtonen
  15  */
  16 public class AcornDatabaseManager {
  17
  18     private static Map<String, Database> dbs = new HashMap<String, Database>();
  19
  20     public static synchronized Database getDatabase(Path folder) throws ProCoreException {
  21         Path canonical;
  22         try {
  23             if (!Files.exists(folder))
  24                 Files.createDirectories(folder);
  25             canonical = folder.toRealPath();
  26         } catch (IOException e) {
  27             throw new ProCoreException("Could not get canonical path.", e);
  28         }
  29
  30         String canonicalPath = canonical.toString();
  31         Database db = dbs.get(canonicalPath);
  32         if (null != db)
  33             return db;
  34
  35         db = new AcornDatabase(canonical);
  36         dbs.put(canonicalPath, db);
  37         return db;
  38     }
  39
  40 }