Simplify file scanner listener handling

[jSite.git] / src / main / java / de / todesbaum / jsite / gui / FileScanner.java

diff --git a/src/main/java/de/todesbaum/jsite/gui/FileScanner.java b/src/main/java/de/todesbaum/jsite/gui/FileScanner.java
index 9135073..1377604 100644 (file)
--- a/src/main/java/de/todesbaum/jsite/gui/FileScanner.java
+++ b/src/main/java/de/todesbaum/jsite/gui/FileScanner.java
@@ -29,6 +29,7 @@ import java.security.NoSuchAlgorithmException;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
+import java.util.Objects;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
@@ -52,7 +53,7 @@ public class FileScanner implements Runnable {
        private final static Logger logger = Logger.getLogger(FileScanner.class.getName());
 
        /** The list of listeners. */
-       private final List<FileScannerListener> fileScannerListeners = new ArrayList<FileScannerListener>();
+       private final FileScannerListener fileScannerListener;
 
        /** The project to scan. */
        private final Project project;
@@ -72,37 +73,9 @@ public class FileScanner implements Runnable {
         * @param project
         *            The project whose files to scan
         */
-       public FileScanner(Project project) {
+       public FileScanner(Project project, FileScannerListener fileScannerListener) {
                this.project = project;
-       }
-
-       /**
-        * Adds the given listener to the list of listeners.
-        *
-        * @param fileScannerListener
-        *            The listener to add
-        */
-       public void addFileScannerListener(FileScannerListener fileScannerListener) {
-               fileScannerListeners.add(fileScannerListener);
-       }
-
-       /**
-        * Removes the given listener from the list of listeners.
-        *
-        * @param fileScannerListener
-        *            The listener to remove
-        */
-       public void removeFileScannerListener(FileScannerListener fileScannerListener) {
-               fileScannerListeners.remove(fileScannerListener);
-       }
-
-       /**
-        * Notifies all listeners that the file scan finished.
-        */
-       protected void fireFileScannerFinished() {
-               for (FileScannerListener fileScannerListener : new ArrayList<FileScannerListener>(fileScannerListeners)) {
-                       fileScannerListener.fileScannerFinished(this);
-               }
+               this.fileScannerListener = Objects.requireNonNull(fileScannerListener);
        }
 
        /**
@@ -138,7 +111,7 @@ public class FileScanner implements Runnable {
                } catch (IOException ioe1) {
                        error = true;
                }
-               fireFileScannerFinished();
+               fileScannerListener.fileScannerFinished(this);
        }
 
        /**