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package org.jaudiotagger.tag.reference; |
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import java.util.EnumSet; |
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import java.util.HashMap; |
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| 11 | 4 | public enum MusicalKey |
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{ |
| 13 | 1 | NOTE_A("A"), |
| 14 | 1 | NOTE_B("B"), |
| 15 | 1 | NOTE_C("C"), |
| 16 | 1 | NOTE_D("D"), |
| 17 | 1 | NOTE_E("E"), |
| 18 | 1 | NOTE_F("F"), |
| 19 | 1 | NOTE_G("G"), |
| 20 | 1 | FLAT("b"), |
| 21 | 1 | SHARP("#"), |
| 22 | 1 | MINOR("m"), |
| 23 | 1 | OFF_KEY("o"); |
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private String value; |
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MusicalKey(String value) |
| 27 | 11 | { |
| 28 | 11 | this.value=value; |
| 29 | 11 | } |
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public String getValue() |
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{ |
| 33 | 15 | return value; |
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} |
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private static final int MAX_KEY_LENGTH = 3; |
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private static EnumSet<MusicalKey> groundKey; |
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private static EnumSet<MusicalKey> halfKey; |
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private final static HashMap<String, MusicalKey> groundKeyMap; |
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private final static HashMap<String, MusicalKey> halfKeyMap; |
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static |
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{ |
| 45 | 1 | groundKey = EnumSet.of(NOTE_A,NOTE_B,NOTE_C,NOTE_D,NOTE_E,NOTE_F,NOTE_G); |
| 46 | 1 | groundKeyMap = new HashMap<String, MusicalKey>(MusicalKey.values().length); |
| 47 | 1 | for (MusicalKey curr : groundKey) |
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{ |
| 49 | 7 | groundKeyMap.put(curr.getValue(), curr); |
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} |
| 51 | 1 | halfKey = EnumSet.of(FLAT,SHARP,MINOR); |
| 52 | 1 | halfKeyMap = new HashMap<String, MusicalKey>(MusicalKey.values().length); |
| 53 | 1 | for (MusicalKey curr : halfKey) |
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{ |
| 55 | 3 | halfKeyMap.put(curr.getValue(), curr); |
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} |
| 57 | 1 | } |
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public static boolean isValid(String musicalKey) |
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{ |
| 61 | 11 | if(musicalKey==null || musicalKey.length()>MAX_KEY_LENGTH || musicalKey.length()==0) |
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{ |
| 63 | 1 | return false; |
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} |
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| 67 | 10 | if(musicalKey.length()==1) |
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{ |
| 69 | 3 | if(musicalKey.equals(OFF_KEY.getValue())) |
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{ |
| 71 | 1 | return true; |
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} |
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} |
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| 75 | 9 | if(!groundKeyMap.containsKey(musicalKey.substring(0,1))) |
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{ |
| 77 | 1 | return false; |
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} |
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| 80 | 8 | if(musicalKey.length()==2||musicalKey.length()==3) |
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{ |
| 82 | 6 | if(!halfKeyMap.containsKey(musicalKey.substring(1,2))) |
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{ |
| 84 | 1 | return false; |
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} |
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} |
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| 88 | 7 | if(musicalKey.length()==3) |
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{ |
| 90 | 2 | if(!musicalKey.substring(2,3).equals(MINOR.getValue())) |
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{ |
| 92 | 1 | return false; |
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} |
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} |
| 95 | 6 | return true; |
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} |
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} |