| 1 | package org.farng.mp3.object; |
| 2 | |
| 3 | import org.farng.mp3.TagConstant; |
| 4 | |
| 5 | import java.util.HashMap; |
| 6 | import java.util.Iterator; |
| 7 | import java.util.TreeSet; |
| 8 | |
| 9 | /** |
| 10 | * ID3v2 and Lyrics3v2 tags have individual fields <code>AbstractMP3Fragment</code>s Then each fragment is broken down |
| 11 | * in to individual <code>AbstractMP3Object</code>s |
| 12 | * |
| 13 | * @author Eric Farng |
| 14 | * @version $Revision: 1.4 $ |
| 15 | */ |
| 16 | public class ObjectStringHashMap extends ObjectStringFixedLength implements ObjectHashMapInterface { |
| 17 | |
| 18 | public static final String LANGUAGE = "Language"; |
| 19 | HashMap idToString = null; |
| 20 | HashMap stringToId = null; |
| 21 | boolean hasEmptyValue = false; |
| 22 | |
| 23 | /** |
| 24 | * Creates a new ObjectStringHashMap object. |
| 25 | */ |
| 26 | public ObjectStringHashMap(final String identifier, final int size) { |
| 27 | super(identifier, size); |
| 28 | if (identifier.equals(ObjectStringHashMap.LANGUAGE)) { |
| 29 | this.stringToId = TagConstant.languageStringToId; |
| 30 | this.idToString = TagConstant.languageIdToString; |
| 31 | } else { |
| 32 | throw new IllegalArgumentException("Hashmap identifier not defined in this class: " + identifier); |
| 33 | } |
| 34 | } |
| 35 | |
| 36 | /** |
| 37 | * Creates a new ObjectStringHashMap object. |
| 38 | */ |
| 39 | public ObjectStringHashMap(final ObjectStringHashMap copyObject) { |
| 40 | super(copyObject); |
| 41 | this.hasEmptyValue = copyObject.hasEmptyValue; |
| 42 | this.idToString = copyObject.idToString; |
| 43 | this.stringToId = copyObject.stringToId; |
| 44 | } |
| 45 | |
| 46 | public HashMap getIdToString() { |
| 47 | return this.idToString; |
| 48 | } |
| 49 | |
| 50 | public HashMap getStringToId() { |
| 51 | return this.stringToId; |
| 52 | } |
| 53 | |
| 54 | public void setValue(final Object value) { |
| 55 | if (value instanceof String) { |
| 56 | this.value = ((String) value).toLowerCase(); |
| 57 | } else { |
| 58 | this.value = value; |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | public boolean equals(final Object obj) { |
| 63 | if ((obj instanceof ObjectStringHashMap) == false) { |
| 64 | return false; |
| 65 | } |
| 66 | final ObjectStringHashMap objectStringHashMap = (ObjectStringHashMap) obj; |
| 67 | if (this.hasEmptyValue != objectStringHashMap.hasEmptyValue) { |
| 68 | return false; |
| 69 | } |
| 70 | if (this.idToString == null) { |
| 71 | if (objectStringHashMap.idToString != null) { |
| 72 | return false; |
| 73 | } |
| 74 | } else { |
| 75 | if (this.idToString.equals(objectStringHashMap.idToString) == false) { |
| 76 | return false; |
| 77 | } |
| 78 | } |
| 79 | if (this.idToString == null) { |
| 80 | if (objectStringHashMap.idToString != null) { |
| 81 | return false; |
| 82 | } |
| 83 | } else { |
| 84 | if (this.stringToId.equals(objectStringHashMap.stringToId) == false) { |
| 85 | return false; |
| 86 | } |
| 87 | } |
| 88 | return super.equals(obj); |
| 89 | } |
| 90 | |
| 91 | public Iterator iterator() { |
| 92 | if (this.idToString == null) { |
| 93 | return null; |
| 94 | } |
| 95 | |
| 96 | // put them in a treeset first to sort them |
| 97 | final TreeSet treeSet = new TreeSet(this.idToString.values()); |
| 98 | if (this.hasEmptyValue) { |
| 99 | treeSet.add(""); |
| 100 | } |
| 101 | return treeSet.iterator(); |
| 102 | } |
| 103 | |
| 104 | public String toString() { |
| 105 | if (this.value == null) { |
| 106 | return ""; |
| 107 | } else if (this.idToString.get(this.value) == null) { |
| 108 | return ""; |
| 109 | } else { |
| 110 | return this.idToString.get(this.value).toString(); |
| 111 | } |
| 112 | } |
| 113 | } |