bundles/org.simantics.scl.commands/src/org/simantics/scl/commands/Commands.java

   1 package org.simantics.scl.commands;\r
   2 \r
   3 import java.util.concurrent.ConcurrentHashMap;\r
   4 \r
   5 import org.simantics.db.ReadGraph;\r
   6 import org.simantics.scl.commands.internal.CommandImpl;\r
   7 \r
   8 \r
   9 public class Commands {\r
  10     private static final ConcurrentHashMap<String, Command> COMMAND_CACHE = \r
  11             new ConcurrentHashMap<String, Command>();\r
  12 \r
  13     /**\r
  14      * Returns a command object of given type. This method always succeeds,\r
  15      * but may return a command object whose check-method always returns fail\r
  16      * and commit will throw an exception.\r
  17      */\r
  18     public static Command get(ReadGraph graph, String name) {\r
  19         Command command = COMMAND_CACHE.get(name);\r
  20         if(command == null) {\r
  21             command = CommandImpl.create(graph, name);\r
  22             COMMAND_CACHE.put(name, command);\r
  23         }\r
  24         return command;\r
  25     }\r
  26 }\r