procedure/single/SyncReadProcedure.java

   1 package org.simantics.db.common.procedure.single;
   2
   3 import org.simantics.db.AsyncReadGraph;
   4 import org.simantics.db.exception.DatabaseException;
   5 import org.simantics.db.procedure.AsyncProcedure;
   6
   7 final public class SyncReadProcedure<T> implements AsyncProcedure<T> {
   8
   9         private Throwable exception = null;
  10         public T result = null;
  11
  12         @Override
  13         public synchronized void execute(AsyncReadGraph graph, T t) {
  14                 result = t;
  15         }
  16
  17         @Override
  18         public void exception(AsyncReadGraph graph, Throwable t) {
  19                 exception = t;
  20         }
  21
  22         public void checkAndThrow() throws DatabaseException {
  23                 if(exception != null) {
  24                         if (exception instanceof DatabaseException)
  25                                 throw (DatabaseException) exception;
  26                         else
  27                                 throw new DatabaseException(
  28                                                 "Unexpected exception in ReadGraph.syncRequest(AsyncRead)",
  29                                                 exception);
  30                 }
  31         }
  32
  33 }
  34