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    1   /*
    2    * Copyright  2000-2004 The Apache Software Foundation
    3    *
    4    *  Licensed under the Apache License, Version 2.0 (the "License");
    5    *  you may not use this file except in compliance with the License.
    6    *  You may obtain a copy of the License at
    7    *
    8    *      http://www.apache.org/licenses/LICENSE-2.0
    9    *
    10   *  Unless required by applicable law or agreed to in writing, software
    11   *  distributed under the License is distributed on an "AS IS" BASIS,
    12   *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   *  See the License for the specific language governing permissions and
    14   *  limitations under the License.
    15   *
    16   */
    17  package org.apache.bcel.verifier;
    18
    19  import javax.swing.event.ListDataEvent;
    20
    21  /***
    22   * This class implements an adapter; it implements both a Swing ListModel and
    23   * a VerifierFactoryObserver.
    24   *
    25   * @version $Id: VerifierFactoryListModel.java 386056 2006-03-15 11:31:56Z tcurdt $
    26   * @author Enver Haase
    27   */
    28  public class VerifierFactoryListModel implements org.apache.bcel.verifier.VerifierFactoryObserver,
    29          javax.swing.ListModel {
    30
    31      private java.util.ArrayList listeners = new java.util.ArrayList();
    32      private java.util.TreeSet cache = new java.util.TreeSet();
    33
    34
    35      public VerifierFactoryListModel() {
    36          VerifierFactory.attach(this);
    37          update(null); // fill cache.
    38      }
    39
    40
    41      public synchronized void update( String s ) {
    42          int size = listeners.size();
    43          Verifier[] verifiers = VerifierFactory.getVerifiers();
    44          int num_of_verifiers = verifiers.length;
    45          cache.clear();
    46          for (int i = 0; i < num_of_verifiers; i++) {
    47              cache.add(verifiers[i].getClassName());
    48          }
    49          for (int i = 0; i < size; i++) {
    50              ListDataEvent e = new ListDataEvent(this, ListDataEvent.CONTENTS_CHANGED, 0,
    51                      num_of_verifiers - 1);
    52              ((javax.swing.event.ListDataListener) (listeners.get(i))).contentsChanged(e);
    53          }
    54      }
    55
    56
    57      public synchronized void addListDataListener( javax.swing.event.ListDataListener l ) {
    58          listeners.add(l);
    59      }
    60
    61
    62      public synchronized void removeListDataListener( javax.swing.event.ListDataListener l ) {
    63          listeners.remove(l);
    64      }
    65
    66
    67      public synchronized int getSize() {
    68          return cache.size();
    69      }
    70
    71
    72      public synchronized Object getElementAt( int index ) {
    73          return (cache.toArray())[index];
    74      }
    75  }