| Revision | 77 (tree) |
|---|---|
| Time | 2015-08-21 01:21:09 |
| Author | t_nakayama1971 |
(empty log message)
| @@ -0,0 +1,172 @@ | ||
| 1 | +package core.util.bean; | |
| 2 | + | |
| 3 | +import java.io.Serializable; | |
| 4 | +import java.util.Arrays; | |
| 5 | +import java.util.Iterator; | |
| 6 | +import java.util.NoSuchElementException; | |
| 7 | + | |
| 8 | +/** | |
| 9 | + * タプル | |
| 10 | + * | |
| 11 | + * @author Tadashi Nakayama | |
| 12 | + * @version 1.0.0 | |
| 13 | + * @param <T> ジェネリックス | |
| 14 | + */ | |
| 15 | +public final class Tuple<T> implements Iterable<T>, Serializable { | |
| 16 | + /** serialVersionUID */ | |
| 17 | + private static final long serialVersionUID = 5818916983288475733L; | |
| 18 | + | |
| 19 | + /** 値保持配列 */ | |
| 20 | + private final T[] value; | |
| 21 | + | |
| 22 | + /** | |
| 23 | + * コンストラクタ | |
| 24 | + * | |
| 25 | + * @param vals 値 | |
| 26 | + */ | |
| 27 | + @SafeVarargs | |
| 28 | + public Tuple(final T... vals) { | |
| 29 | + if (vals == null) { | |
| 30 | + throw new IllegalArgumentException(); | |
| 31 | + } | |
| 32 | + | |
| 33 | + this.value = Arrays.copyOf(vals, vals.length); | |
| 34 | + } | |
| 35 | + | |
| 36 | + /** | |
| 37 | + * 長さ取得 | |
| 38 | + * | |
| 39 | + * @return 長さ | |
| 40 | + */ | |
| 41 | + public int length() { | |
| 42 | + return this.value.length; | |
| 43 | + } | |
| 44 | + | |
| 45 | + /** | |
| 46 | + * 取得 | |
| 47 | + * | |
| 48 | + * @param loc 位置 | |
| 49 | + * @return 値 | |
| 50 | + */ | |
| 51 | + public T get(final int loc) { | |
| 52 | + if (loc < 0 || this.value.length <= loc) { | |
| 53 | + throw new ArrayIndexOutOfBoundsException(loc); | |
| 54 | + } | |
| 55 | + return this.value[loc]; | |
| 56 | + } | |
| 57 | + | |
| 58 | + /** | |
| 59 | + * @see java.lang.Object#toString() | |
| 60 | + */ | |
| 61 | + @Override | |
| 62 | + public String toString() { | |
| 63 | + return Arrays.toString(this.value); | |
| 64 | + } | |
| 65 | + | |
| 66 | + /** | |
| 67 | + * 配列化 | |
| 68 | + * | |
| 69 | + * @return 配列 | |
| 70 | + */ | |
| 71 | + public T[] toArray() { | |
| 72 | + return Arrays.copyOf(this.value, this.value.length); | |
| 73 | + } | |
| 74 | + | |
| 75 | + /** | |
| 76 | + * @see java.lang.Iterable#iterator() | |
| 77 | + */ | |
| 78 | + @Override | |
| 79 | + public Iterator<T> iterator() { | |
| 80 | + return new TupleIterator<>(this.value); | |
| 81 | + } | |
| 82 | + | |
| 83 | + /** | |
| 84 | + * 連結 | |
| 85 | + * | |
| 86 | + * @param <T> ジェネリックス | |
| 87 | + * @param val 値 | |
| 88 | + * @param tpl タプル | |
| 89 | + * @return 連結結果 | |
| 90 | + */ | |
| 91 | + public static <T> Tuple<T> cons(final T[] val, final Tuple<T> tpl) { | |
| 92 | + return cons(new Tuple<>(val), tpl); | |
| 93 | + } | |
| 94 | + | |
| 95 | + /** | |
| 96 | + * 連結 | |
| 97 | + * | |
| 98 | + * @param <T> ジェネリックス | |
| 99 | + * @param tpl タプル | |
| 100 | + * @param val 値 | |
| 101 | + * @return 連結結果 | |
| 102 | + */ | |
| 103 | + @SafeVarargs | |
| 104 | + public static <T> Tuple<T> cons(final Tuple<T> tpl, final T... val) { | |
| 105 | + return cons(tpl, new Tuple<>(val)); | |
| 106 | + } | |
| 107 | + | |
| 108 | + /** | |
| 109 | + * 連結 | |
| 110 | + * | |
| 111 | + * @param <T> ジェネリックス | |
| 112 | + * @param tpl1 タプル | |
| 113 | + * @param tpl2 タプル | |
| 114 | + * @return 連結結果 | |
| 115 | + */ | |
| 116 | + public static <T> Tuple<T> cons(final Tuple<T> tpl1, final Tuple<T> tpl2) { | |
| 117 | + T[] array = Arrays.copyOf(tpl1.value, tpl1.value.length + tpl2.value.length); | |
| 118 | + System.arraycopy(tpl2.value, 0, array, tpl1.length(), tpl2.length()); | |
| 119 | + return new Tuple<>(array); | |
| 120 | + } | |
| 121 | + | |
| 122 | + /** | |
| 123 | + * イテレータクラス | |
| 124 | + * | |
| 125 | + * @author Tadashi Nakayama | |
| 126 | + * @version 1.0.0 | |
| 127 | + * @param <E> ジェネリックス | |
| 128 | + */ | |
| 129 | + private static final class TupleIterator<E> implements Iterator<E> { | |
| 130 | + /** 現在位置 */ | |
| 131 | + private int loc = 0; | |
| 132 | + /** インスタンス */ | |
| 133 | + private final E[] value; | |
| 134 | + | |
| 135 | + /** | |
| 136 | + * コンストラクタ | |
| 137 | + * | |
| 138 | + * @param val インスタンス | |
| 139 | + */ | |
| 140 | + public TupleIterator(final E[] val) { | |
| 141 | + this.value = val; | |
| 142 | + } | |
| 143 | + | |
| 144 | + /** | |
| 145 | + * @see java.util.Iterator#hasNext() | |
| 146 | + */ | |
| 147 | + @Override | |
| 148 | + public boolean hasNext() { | |
| 149 | + return this.loc < this.value.length; | |
| 150 | + } | |
| 151 | + | |
| 152 | + /** | |
| 153 | + * @see java.util.Iterator#next() | |
| 154 | + */ | |
| 155 | + @Override | |
| 156 | + public E next() { | |
| 157 | + if (this.value.length <= this.loc) { | |
| 158 | + throw new NoSuchElementException(); | |
| 159 | + } | |
| 160 | + | |
| 161 | + return this.value[this.loc++]; | |
| 162 | + } | |
| 163 | + | |
| 164 | + /** | |
| 165 | + * @see java.util.Iterator#remove() | |
| 166 | + */ | |
| 167 | + @Override | |
| 168 | + public void remove() { | |
| 169 | + throw new UnsupportedOperationException(); | |
| 170 | + } | |
| 171 | + } | |
| 172 | +} |