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   1 /**
   2  * Copyright (c) 2010-2023 Contributors to the openHAB project
   3  *
   4  * See the NOTICE file(s) distributed with this work for additional
   5  * information.
   6  *
   7  * This program and the accompanying materials are made available under the
   8  * terms of the Eclipse Public License 2.0 which is available at
   9  * http://www.eclipse.org/legal/epl-2.0
  10  *
  11  * SPDX-License-Identifier: EPL-2.0
  12  */
  13 package org.openhab.binding.plugwise.internal;
  14
  15 import java.util.ArrayList;
  16 import java.util.List;
  17 import java.util.concurrent.CopyOnWriteArrayList;
  18
  19 import org.eclipse.jdt.annotation.NonNullByDefault;
  20 import org.openhab.binding.plugwise.internal.listener.PlugwiseMessageListener;
  21 import org.openhab.binding.plugwise.internal.protocol.Message;
  22 import org.openhab.binding.plugwise.internal.protocol.field.MACAddress;
  23 import org.slf4j.Logger;
  24 import org.slf4j.LoggerFactory;
  25
  26 /**
  27  * The {@link PlugwiseFilteredMessageListenerList} keeps track of a list of {@link PlugwiseFilteredMessageListener}s and
  28  * facilitates listener operations such as message notification.
  29  *
  30  * @author Wouter Born - Initial contribution
  31  */
  32 @NonNullByDefault
  33 public class PlugwiseFilteredMessageListenerList {
  34
  35     private final Logger logger = LoggerFactory.getLogger(PlugwiseFilteredMessageListenerList.class);
  36
  37     private final List<PlugwiseFilteredMessageListener> filteredListeners = new CopyOnWriteArrayList<>();
  38
  39     public void addListener(PlugwiseMessageListener listener) {
  40         if (!isExistingListener(listener)) {
  41             filteredListeners.add(new PlugwiseFilteredMessageListener(listener));
  42         }
  43     }
  44
  45     public void addListener(PlugwiseMessageListener listener, MACAddress macAddress) {
  46         if (!isExistingListener(listener, macAddress)) {
  47             filteredListeners.add(new PlugwiseFilteredMessageListener(listener, macAddress));
  48         }
  49     }
  50
  51     public boolean isExistingListener(PlugwiseMessageListener listener) {
  52         return filteredListeners.stream().anyMatch(filteredListener -> filteredListener.getListener().equals(listener));
  53     }
  54
  55     public boolean isExistingListener(PlugwiseMessageListener listener, MACAddress macAddress) {
  56         return filteredListeners.stream().anyMatch(filteredListener -> filteredListener.getListener().equals(listener)
  57                 && macAddress.equals(filteredListener.getMACAddress()));
  58     }
  59
  60     public void notifyListeners(Message message) {
  61         for (PlugwiseFilteredMessageListener filteredListener : filteredListeners) {
  62             if (filteredListener.matches(message)) {
  63                 try {
  64                     filteredListener.getListener().handleResponseMessage(message);
  65                 } catch (Exception e) {
  66                     logger.warn("Listener failed to handle message: {}", message, e);
  67                 }
  68             }
  69         }
  70     }
  71
  72     public void removeListener(PlugwiseMessageListener listener) {
  73         List<PlugwiseFilteredMessageListener> removedListeners = new ArrayList<>();
  74         for (PlugwiseFilteredMessageListener filteredListener : filteredListeners) {
  75             if (filteredListener.getListener().equals(listener)) {
  76                 removedListeners.add(filteredListener);
  77             }
  78         }
  79
  80         filteredListeners.removeAll(removedListeners);
  81     }
  82 }