case-study/refaktor-after/src/no/uio/ifi/refaktor/change/SingleExecutionExecutorManager.java

   1 package no.uio.ifi.refaktor.change;
   2
   3 import no.uio.ifi.refaktor.change.exceptions.ExecutorManagerInitializationException;
   4 import no.uio.ifi.refaktor.change.exceptions.SingleExecutionViolationException;
   5 import no.uio.ifi.refaktor.change.executors.Executor;
   6
   7 import org.eclipse.core.runtime.CoreException;
   8 import org.eclipse.core.runtime.IProgressMonitor;
   9
  10 public class SingleExecutionExecutorManager implements ExecutorManager {
  11         private Executor executor;
  12         private boolean isExecuted;
  13
  14         public SingleExecutionExecutorManager() {
  15                 this(null);
  16         }
  17
  18         public SingleExecutionExecutorManager(Executor executor) {
  19                 setExecutor(executor);
  20         }
  21
  22         @Override
  23         public void setExecutor(Executor executor) {
  24                 this.executor = executor;
  25                 isExecuted = false;
  26         }
  27
  28         @Override
  29         public void executeChange(IProgressMonitor monitor) throws CoreException {
  30                 if (executor == null)
  31                         throw new ExecutorManagerInitializationException(this.getClass().getSimpleName() + ": No executor set!");
  32
  33                 if (isExecuted)
  34                         throw new SingleExecutionViolationException("The change can only be executed once!");
  35
  36                 executor.execute(monitor);
  37                 markAsExecuted();
  38         }
  39
  40         private void markAsExecuted() {
  41                 isExecuted = true;
  42         }
  43 }