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   1 /**
   2  * Copyright (c) 2010-2022 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.velbus.internal;
  14
  15 import java.util.ArrayList;
  16 import java.util.List;
  17
  18 import org.eclipse.jdt.annotation.NonNullByDefault;
  19 import org.openhab.core.thing.ChannelUID;
  20
  21 /**
  22  * The {@link VelbusModuleAddress} represents the address and possible subaddresses of a Velbus module.
  23  *
  24  * @author Cedric Boon - Initial contribution
  25  */
  26 @NonNullByDefault
  27 public class VelbusModuleAddress {
  28     private byte address;
  29     private byte[] subAddresses;
  30
  31     public VelbusModuleAddress(byte address, int numberOfSubAddresses) {
  32         this(address, getInitialSubAddresses(numberOfSubAddresses));
  33     }
  34
  35     public VelbusModuleAddress(byte address, byte[] subAddresses) {
  36         this.address = address;
  37         this.subAddresses = subAddresses;
  38     }
  39
  40     public byte getAddress() {
  41         return address;
  42     }
  43
  44     public void setSubAddresses(byte[] subAddresses) {
  45         this.subAddresses = subAddresses;
  46     }
  47
  48     public byte[] getSubAddresses() {
  49         return subAddresses;
  50     }
  51
  52     public byte[] getActiveAddresses() {
  53         List<Byte> activeAddresses = new ArrayList<>();
  54         activeAddresses.add(address);
  55
  56         for (int i = 0; i < subAddresses.length; i++) {
  57             if (subAddresses[i] != (byte) 0xFF) {
  58                 activeAddresses.add(subAddresses[i]);
  59             }
  60         }
  61
  62         byte[] result = new byte[activeAddresses.size()];
  63
  64         for (int i = 0; i < activeAddresses.size(); i++) {
  65             result[i] = activeAddresses.get(i);
  66         }
  67
  68         return result;
  69     }
  70
  71     public VelbusChannelIdentifier getChannelIdentifier(ChannelUID channelUID) {
  72         int channelIndex = getChannelIndex(channelUID);
  73
  74         return getChannelIdentifier(channelIndex);
  75     }
  76
  77     public int getChannelNumber(ChannelUID channelUID) {
  78         return Integer.parseInt(channelUID.getIdWithoutGroup().substring(2));
  79     }
  80
  81     public int getChannelIndex(ChannelUID channelUID) {
  82         return getChannelNumber(channelUID) - 1;
  83     }
  84
  85     public String getChannelId(VelbusChannelIdentifier velbusChannelIdentifier) {
  86         return "CH" + getChannelNumber(velbusChannelIdentifier);
  87     }
  88
  89     public int getChannelIndex(VelbusChannelIdentifier velbusChannelIdentifier) {
  90         return this.getChannelNumber(velbusChannelIdentifier) - 1;
  91     }
  92
  93     public int getChannelNumber(VelbusChannelIdentifier velbusChannelIdentifier) {
  94         byte[] activeAddresses = getActiveAddresses();
  95
  96         for (int i = 0; i < activeAddresses.length; i++) {
  97             if (velbusChannelIdentifier.getAddress() == activeAddresses[i]) {
  98                 return (i * 8) + velbusChannelIdentifier.getChannelNumberFromBitNumber();
  99             }
 100         }
 101
 102         throw new IllegalArgumentException("The byte '" + velbusChannelIdentifier.getChannelByte()
 103                 + "' does not represent a valid channel on the address '" + velbusChannelIdentifier.getAddress()
 104                 + "'.");
 105     }
 106
 107     public VelbusChannelIdentifier getChannelIdentifier(int channelIndex) {
 108         int addressIndex = channelIndex / 8;
 109         int addressChannelIndex = channelIndex % 8;
 110
 111         byte address = addressIndex == 0 ? this.address : subAddresses[addressIndex - 1];
 112         byte channel = (byte) Math.pow(2, addressChannelIndex);
 113
 114         return new VelbusChannelIdentifier(address, channel);
 115     }
 116
 117     private static byte[] getInitialSubAddresses(int numberOfSubAddresses) {
 118         byte[] subAddresses = new byte[numberOfSubAddresses];
 119
 120         for (int i = 0; i < numberOfSubAddresses; i++) {
 121             subAddresses[i] = (byte) 0xFF;
 122         }
 123
 124         return subAddresses;
 125     }
 126 }