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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.dmx.internal.multiverse;
  14
  15 import java.util.ArrayList;
  16 import java.util.List;
  17 import java.util.regex.Matcher;
  18 import java.util.regex.Pattern;
  19 import java.util.stream.IntStream;
  20 import java.util.stream.Stream;
  21
  22 import org.eclipse.jdt.annotation.NonNullByDefault;
  23 import org.eclipse.jdt.annotation.Nullable;
  24 import org.openhab.binding.dmx.internal.Util;
  25 import org.slf4j.Logger;
  26 import org.slf4j.LoggerFactory;
  27
  28 /**
  29  * The {@link BaseDmxChannel} represents a basic DMX channel
  30  *
  31  * @author Jan N. Klug - Initial contribution
  32  */
  33 @NonNullByDefault
  34 public class BaseDmxChannel implements Comparable<BaseDmxChannel> {
  35     public static final int MIN_CHANNEL_ID = 1;
  36     public static final int MAX_CHANNEL_ID = 512;
  37
  38     protected static final Pattern CHANNEL_PATTERN = Pattern.compile("^(\\d*(?=:))?:?(\\d*)\\/?(\\d*)?$");
  39
  40     // this static declaration is needed because of the static fromString method
  41     private static final Logger LOGGER = LoggerFactory.getLogger(BaseDmxChannel.class);
  42
  43     private int universeId;
  44     private final int dmxChannelId;
  45
  46     /**
  47      * BaseChannel object
  48      *
  49      * @param universeId integer for DMX universe
  50      * @param dmxChannelId integer for DMX channel
  51      */
  52     public BaseDmxChannel(int universeId, int dmxChannelId) {
  53         this.universeId = universeId;
  54         this.dmxChannelId = Util.coerceToRange(dmxChannelId, MIN_CHANNEL_ID, MAX_CHANNEL_ID, LOGGER, "channelId");
  55     }
  56
  57     /**
  58      * copy constructor
  59      *
  60      * @param dmxChannel a BaseChannel object
  61      */
  62     public BaseDmxChannel(BaseDmxChannel dmxChannel) {
  63         this.universeId = dmxChannel.getUniverseId();
  64         this.dmxChannelId = dmxChannel.getChannelId();
  65         LOGGER.trace("created DMX channel {} in universe {} ", dmxChannelId, universeId);
  66     }
  67
  68     /**
  69      * get DMX channel
  70      *
  71      * @return an integer for the DMX channel
  72      */
  73     public int getChannelId() {
  74         return dmxChannelId;
  75     }
  76
  77     /**
  78      * get DMX universe
  79      *
  80      * @return a integer for the DMX universe
  81      */
  82     public int getUniverseId() {
  83         return universeId;
  84     }
  85
  86     /**
  87      * set the DMX universe id
  88      *
  89      * @param universeId an integer for the new universe
  90      */
  91     public void setUniverseId(int universeId) {
  92         this.universeId = universeId;
  93     }
  94
  95     @Override
  96     public int compareTo(@Nullable BaseDmxChannel otherDmxChannel) {
  97         if (otherDmxChannel == null) {
  98             return -1;
  99         }
 100         int universeCompare = Integer.compare(getUniverseId(), otherDmxChannel.getUniverseId());
 101         if (universeCompare == 0) {
 102             return Integer.compare(getChannelId(), otherDmxChannel.getChannelId());
 103         } else {
 104             return universeCompare;
 105         }
 106     }
 107
 108     @Override
 109     public String toString() {
 110         return universeId + ":" + dmxChannelId;
 111     }
 112
 113     /**
 114      * parse a BaseChannel list from string
 115      *
 116      * @param dmxChannelString channel string in format [universe:]channel[/width],...
 117      * @param defaultUniverseId default id to use if universe not specified
 118      * @return a List of BaseChannels
 119      */
 120     public static List<BaseDmxChannel> fromString(String dmxChannelString, int defaultUniverseId)
 121             throws IllegalArgumentException {
 122         List<BaseDmxChannel> dmxChannels = new ArrayList<>();
 123
 124         Stream.of(dmxChannelString.split(",")).forEach(singleDmxChannelString -> {
 125             int dmxChannelId, dmxChannelWidth;
 126             Matcher channelMatch = CHANNEL_PATTERN.matcher(singleDmxChannelString);
 127             if (channelMatch.matches()) {
 128                 final int universeId = (channelMatch.group(1) == null) ? defaultUniverseId
 129                         : Integer.parseInt(channelMatch.group(1));
 130                 dmxChannelWidth = "".equals(channelMatch.group(3)) ? 1 : Integer.parseInt(channelMatch.group(3));
 131                 dmxChannelId = Integer.parseInt(channelMatch.group(2));
 132                 LOGGER.trace("parsed channel string {} to universe {}, id {}, width {}", singleDmxChannelString,
 133                         universeId, dmxChannelId, dmxChannelWidth);
 134                 IntStream.range(dmxChannelId, dmxChannelId + dmxChannelWidth)
 135                         .forEach(c -> dmxChannels.add(new BaseDmxChannel(universeId, c)));
 136             } else {
 137                 throw new IllegalArgumentException("invalid channel definition" + singleDmxChannelString);
 138             }
 139         });
 140
 141         return dmxChannels;
 142     }
 143 }